South China Sea Fisheries Research Articles

Analysis of fishing intensity in the South China Sea based on automatic identification system data: A comparison between China and Vietnam

AbstractObjectiveRecently, the South China Sea has been facing a crisis of depleted fishery resources, primarily due to the impacts of illegal, unreported, and unregulated fishing activities, as well as overfishing. Accurately understanding the fishing activity intensity in the South China Sea holds significant implications for the sustainable management of fisheries resources.MethodsLeveraging the automatic identification system trajectory data from 2018, this paper employs spatial statistical methods and fishing effort indicators to comparatively analyze the spatial variations in fishing intensity between Chinese and Vietnamese fishing vessels.ResultThe results of this study show that (1) in 2018, the total fishing effort of Chinese fishing vessels in the South China Sea was 7.65 times that of Vietnamese vessels, but during China's South China Sea fishing moratorium, the fishing effort exerted by Vietnamese vessels surpassed that of China and (2) the top 10 ports in China and Vietnam support approximately 30% and 55.13% of their respective fishing intensities in the South China Sea.ConclusionThe study highlights significant variations in fishing intensity between Chinese and Vietnamese vessels and the substantial support provided by major ports. These findings offer valuable insights for fisheries resource monitoring and maritime spatial planning, contributing to the sustainable management of the South China Sea's fisheries resources.

The developments of marine environmental protection obligation in article 192 of UNCLOS and the operational impact on China's marine policy – A south China sea fisheries perspective

States have the obligation to protect and preserve the marine environment under Article 192 of the United Nations Convention on the Law of the Sea (UNCLOS), however, the wording in Article 192 of UNCLOS is too general to apply in practice. For a quarter of a century since UNCLOS entered into forth in 1994, the marine environmental protection obligation has been interpreted and developed by international courts and tribunals, especially by the South China Sea (SCS) Arbitration. This paper first analyzes the developments of marine environmental protection obligation made by the SCS Arbitration in submission 11 and 12B. Then the paper aims to demonstrate that, even though China repeated its non-compliance policy towards the SCS Arbitration, the developments of marine environmental protection obligation made by the SCS Tribunal still had significant operational impact in China's marine policy, especially in China's SCS fisheries policy.

A step forward to the joint management of the South China Sea fisheries resources: Joint works on catches, management measures and conservation issues

Degradation of the fishery resources in the SCS has been frequently reported, and calls for international cooperation through establishing an international or multilateral fisheries management organization were frequently made in recent years. However, little progress has been observed in this regard and most resources in the region are not subject to any regional cooperative management, mainly due to the disputes of sovereign rights on the SCS. In order to bypass such disputes and take a practical step forward towards reaching the goal of joint management for the SCS fisheries, a ‘bottom-up approach’ was undertaken through holding a “SCS Fisheries Resources and Management Workshop” in 2017 which is a non-political, depoliticized and non-State driven forum with key SCS fishing actors providing and exchanging substantive information on their individual fisheries for building up mutual understanding and confidence as the first step for further collaboration on the management of SCS fisheries resources. Based on information from the Workshop and substantial joint works afterwards, for the first time, this study have successfully compiled and presented basic information on (1) the fisheries statistics from key fishing actors of the region, (2) the management measures implemented by each fishing actor, and (3) subjective evaluations from managers/scientists of the key fishing actors through a questionnaire study on the causes of the stock depletion and/or the key issues that should be addressed for any potential stock recovery. Several statistical issues have been identified, and a further review of the existing statistical systems of the participating parties was recommended as an important topic for future meetings. Communication and mutual understanding of the management measures designed for and implemented in the region are considered crucial for the future construction of any regional collaborative management scheme. High priority issues that were emphasized by the respondents of the questionnaire study include insufficient control on fishing capacity and fishing efforts as well as weak law enforcement; which may relate to the issues of insufficient enforcement resources, low policy priority and institutional weakness.

Fish community structure and its relationship with environmental factors in Leizhou Bay

PDF HTML阅读 XML下载 导出引用 引用提醒 雷州湾附近海域鱼类群落结构及其与环境因子的关系 DOI: 作者: 作者单位: 1. 广东海洋大学水产学院, 广东 湛江 524088;2. 中国水产科学研究院南海水产研究所, 农业农村部南海渔业资源开发利用重点实验室, 广东省渔业生态环境重点实验室, 广东 广州 510300 作者简介: 曾嘉维(1992-),男,硕士研究生,从事渔业生态学研究.E-mail:zengjw1992@163.com 通讯作者: 中图分类号: S931 基金项目: 公益性行业（农业）科研专项经费项目（201403008）. Fish community structure and its relationship with environmental factors in Leizhou Bay Author: Affiliation: 1. Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China;2. Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs;Guangdong Provincial Key Laboratory of Fishery Ecology and Environment;South China Sea Fisheries Re-search Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为了解雷州湾及其附近海域渔业生物的群落结构及其物理影响因素，于2016—2017年开展了4个季度的底拖网渔业资源与生态环境调查。运用聚类分析、相似性百分比分析以及冗余分析研究了该海域鱼类群落结构及其与环境因子之间的关系。结果表明，雷州湾附近海域共捕获鱼类256种，以底层鱼类和暖水性鱼类为主；各季节均可划分为两个亚群落（Anosim test：Cynoglossus puncticeps）、中华海鲇（）等；群落Ⅱ的平均相似性为41.38%~52.59%，主要贡献种为多齿蛇鲻（）等。两个亚群落的平均相异性为57.74%~76.25%；水深是4个季度显著影响鱼类分布的重要生态因子，溶解氧是3个季度显著影响鱼类分布的重要环境因子。综上所述，雷州湾及其附近海域鱼类种类数丰富，高于海州湾、大亚湾等海域；本研究揭示了该海域鱼类群落结构特征及其与环境因子的关系，为该海域鱼类资源的养护及利用提供参考依据。 Abstract:Leizhou Bay, located on the eastern side of Leizhou Peninsula in Guangdong province, is the primary habitat of Chinese white dolphin (), besides being a reserve for juvenile fish and shrimp. However, the ecological state of this coastal ecosystem remains largely unknown. To understand the fish community structure and its physical drivers in Leizhou Bay, seasonal bottom trawl along with environment monitoring surveys were conducted from 2016 to 2017. The relationships of fish community structure with environmental factors were analyzed using K-means cluster analysis, similarity percentage analysis, and redundancy analysis. These analyses led to the identification of 256 fish species, comprising mainly demersal fish and warm-water fish. The study sites for each season could be divided into two groups:group I, with water depth of less than 10 m, and group Ⅱ, with water depth between 10 m and 20 m. Group I showed an average similarity of 38.48%-47.44% across seasons in terms of fish community structure (which was shown as matrixes of sites by species biomass). Three species, Plotosus lineatus contributed greatly to the average similarity within Group I in summer, fall and winter. Furthermore, Group Ⅱ showed an average similarity of 41.38%-52.59% across seasons. The contributed mostly to the average similarity within Group Ⅱ in spring, summer and winter. The average dissimilarity between group I and group Ⅱ in seasons was 57.74%-76.25%. Six ecological factors, i.e. depth, dissolved oxygen, water temperature, salinity, pH, and chlorophyll a, explained 41.76%-47.11% of variation in fish biomass, with depth being the dominant environmental factor affecting fish community structure in each season. Moreover, the fish species richness in Leizhou Bay was obviously higher than in other bays of China. This study provides preliminary data on fish community structure and its relationship with environmental factors in Leizhou Bay, and provides clues for stocking enhancement in the waters. 参考文献 相似文献 引证文献

Analysis of Priacanthus macracanthus fishing grounds in the northern South China Sea based on sea surface temperature and depth

Analysis of <i>Priacanthus macracanthus</i> fishing grounds in the northern South China Sea based on sea surface temperature and depth

The probability distribution of the jack mackerel ( Trachurus japonicus ) density in the offshore of the northern South China Sea

PDF HTML阅读 XML下载 导出引用 引用提醒 南海北部近海竹荚鱼资源密度的概率分布型特征 DOI: 作者: 作者单位: 1. 中国水产科学研究院南海水产研究所, 农业农村部外海渔业开发重点实验室, 广东 广州 510300;2. 上海海洋大学海洋科学学院, 上海 201306 作者简介: 晏然(1993-),男,硕士研究生,主要从事渔业资源空间分析研究.E-mail:harbinyanran@qq.com 通讯作者: 中图分类号: S931 基金项目: 公益性行业（农业）科研专项（201403008）；农业财政专项“南海北部近海渔业资源调查”（2014-2018）；广东省促进海洋经济发展专项资金（GDME-2018E004）；中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金项目（2015TS22）. The probability distribution of the jack mackerel (Trachurus japonicus) density in the offshore of the northern South China Sea Author: Affiliation: 1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs;Guangdong Provincial Key Laboratory of Fishery Ecology and Environment;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:竹荚鱼（）是中国南海北部近海主要渔获物之一，其空间分布具有非均匀性。根据2014—2017年南海北部近海两个周期（2014—2015年为第1周期，2016—2017年为第2周期）的底拖网调查数据，以单位捕捞努力量（catch per unit effort，CPUE）表征资源密度，采用柯尔莫可洛夫-斯米洛夫检验（Kolmogorov-Smirnov，K-S test）探索了11种概率分布特征。结果表明，南海北部陆架区竹荚鱼不具明显的概率分布特征，而北部湾海域竹荚鱼资源密度服从对数正态分布型且第二周期较第一周期更为显著。同时，采用基于对数正态理论模型法（对数正态模型与Delta模型）与调查设计法（均值法）对该海域进行资源密度估值比较，发现基于对数正态理论模型更切合竹荚鱼资源密度结构分布特征，而在对数正态理论模型中Delta模型法更适用于该物种资源密度估值。 Abstract:The jack mackerel () is one of the main catches in the northern South China Sea, and its spatial distribution is non-uniform. According to the two cycles of bottom trawl survey data in the northern South China Sea from 2014 to 2017 (2014-2015 is the first cycle, 2016-2017 is the second cycle), resource density is characterized by the catch per unit effort (CPUE). The Kolmogorov-Smirnov test (K-S test) was used to explore 11 probability distribution features. The results showed that the continental shelf area of the northern South China Sea had no obvious probability distribution, while the jack mackerel resource density in the Beibu Gulf obeys the lognormal distribution pattern, and the second cycle is more significant than the first cycle. At the same time, using a lognormal theory model (lognormal model and delta model) and an investigative design method (arithmetic method) to compare the estimation of the resource density within a certain area, we found that the lognormal model is more fit to describe the distribution characteristics of the density structure of jack mackerel, and the delta model is more suitable to estimate the jack mackerel resource density. 参考文献 相似文献 引证文献

Characteristics of zooplankton community structure and its seasonal variation in Lingshui Bay

PDF HTML阅读 XML下载 导出引用 引用提醒 陵水湾浮游动物群落结构特征及其季节变化 DOI: 作者: 作者单位: 中国水产科学研究院南海水产研究所, 农业农村部外海渔业开发重点实验室, 广东 广州 510300 作者简介: 龚玉艳(1985-),助理研究员,从事海洋浮游动物、鱼类摄食生态及食物网研究.E-mail:yuyangong@163.com 通讯作者: 中图分类号: S931 基金项目: 公益性行业（农业）专项经费项目（201403008）；国家重点基础研究发展计划项目（2014CB441500）. Characteristics of zooplankton community structure and its seasonal variation in Lingshui Bay Author: Affiliation: Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs;South China Sea Fisher-ies Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为了探明陵水湾浮游动物饵料情况，本研究依据2014年11月（秋季）、2015年5月（春季）、8月（夏季）和2016年1月（冬季）陵水湾4个航次的调查资料，分析了该海湾浮游动物的种类组成、优势种、丰度和生物量、生物多样性等群落结构特征及其影响因素。调查共发现浮游动物94种和浮游幼虫21类，其中桡足类（Copepoda）最多，有38种，其次是水螅水母类（Hydromedusae）11种，毛颚类（Chaetognatha）8种，其余类群种类数在1~6种之间。浮游动物群落主要由广温广盐类群、暖水沿岸类群和暖水外海类群组成，优势种主要分布在前两个类群，无全年优势种；浮游幼虫是陵水湾的重要类群，丰度呈现为冬季（低温）高于春季（高温）。与亚热带海域不同，低温已不再是制约陵水湾海洋生物生长的主要因子。浮游动物丰度和生物量均呈现为秋季最高，春季最低，冬季高于夏季。浮游动物群落物种Shannon-Wiener指数（'）的变化趋势一致，表现为春夏季高，秋冬季低，湾外高，湾内低。聚类分析结果表明，陵水湾浮游动物可分为湾内和湾外两个群落，主要受地形阻隔所致。盐度与浮游动物丰度和生物量均呈显著负相关关系，是浮游动物季节变化的主要影响因子之一。根据陵水湾浮游动物年均生物量估算出浮游动物提供的渔产潜力为2.24×104 kg。陵水湾浮游动物丰度呈现剧烈的季节变化，有必要对其进行长期的跟踪监测。 Abstract:Based on the data obtained from four cruises in November (autumn) 2014, May (spring) and August (summer) 2015, and January (winter) 2016, the structure of zooplankton community in Lingshui Bay, including species composition, abundance, dominant species, and species diversity, was studied. A total of 94 zooplankton species and 21 types of pelagic larvae were identified. The most dominant group of zooplankton was copepods (38 species), followed by hydromedusae (11 species), and Chaetognatha (8 species), accounting for 40.43%, 11.70%, and 8.51% of the total species, respectively. The remaining groups were represented by 1 to 6 species per group. Based on species composition and ecological distribution, the zooplankton community in Lingshui Bay mainly comprised three ecological groups, including eurythermal euryhaline group, warm water coastal group, and warm water pelagic group; the dominant species were distributed mainly in the former two groups. No dominant species was widespread throughout all the seasons. Appendiculata was the only dominant group all year-round. Pelagic larvae formed an important group in Lingshui Bay. Their abundance in winter (lower water temperature) was higher than in spring (higher water temperature), which was different from that in subtropical waters. This suggests that in Lingshui Bay, lower seawater temperature was no longer the main factor determining zooplankton abundance. The abundance and biomass of zooplankton were highest in autumn, followed by winter, summer, and finally, spring. Both the species diversity indices were consistent in seasonal and horizontal variation, being higher in spring and summer than in autumn and winter, and higher in the outer bay than the inner bay. Two communities, from the inner and outer bays, were identified by clustering analysis, which can be mainly attributed to the barrier caused by the terrain. Furthermore, we measured temperature, salinity, concentration of chlorophyll a, phytoplankton abundance, and concentration of dissolved oxygen and determined the responses of the zooplankton community to these factors. Salinity was the primary factor influencing zooplankton community structure in Lingshui Bay, based on Pearson's correlation analysis. Based on the annual biomass of zoo-plankton in Lingshui Bay, potential productivity of zooplankton was estimated to be 2.24×104 kg. The abundance of zooplankton in Lingshui Bay has changed dramatically with different seasons. Thus, it is necessary to continuously monitor zooplankton abundance in Lingshui Bay over a long period to better understand the actual prey situation. 参考文献 相似文献 引证文献

Genetic differentiation of the purpleback flying squid, Sthenoteuthis oualaniensis , in the South China Sea:population or species divergence

PDF HTML阅读 XML下载 导出引用 引用提醒 南海鸢乌贼的遗传差异: 种群分化还是种间分化 DOI: 作者: 作者单位: 中国水产科学研究院南海水产研究所, 农业农村部外海渔业开发重点实验室, 广东 广州 510300 作者简介: 李敏(1984-),男,博士,副研究员,从事海洋生物多样性和保护研究.E-mail:limin@scsfri.ac.cn 通讯作者: 中图分类号: S931 基金项目: 国家重点研发计划项目（2018YFC1406500）；农业农村部财政专项（NFZX2018）；广东省自然科学基金项目（2014A030310177）；国家重点基础研究发展计划项目（2014CB441500）. Genetic differentiation of the purpleback flying squid, Sthenoteuthis oualaniensis, in the South China Sea:population or species divergence Author: Affiliation: Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs;South China Sea Fisher-ies Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:利用线粒体ND2、COI和16S rDNA序列，对2012年9月至2015年9月采自南海的鸢乌贼（）样本进行了种群遗传结构的分析。系统发育关系显示鸢乌贼中型群和微型群各自形成了单系群分支，而分支内没有形成与地理群体或季节群体对应的支系。分子方差分析同样表明，地理群体或季节群体之间不存在明显的遗传分化，而中型群和微型群之间具有极显著的遗传分化（<0.0001）。遗传多样性分析显示，鸢乌贼中型群和微型群均呈现出较高的单倍型多样性（0.9465和0.8545）和较低的核苷酸多样性（0.0051和0.0021），中型群的遗传多样性指数要高于微型群。基于ND2、COI和16S rDNA序列计算的中型群和微型群之间的遗传距离分别达到了14.0%、9.6%和8.8%，远大于类群内的遗传分化（平均<1%）。研究结果表明，南海鸢乌贼存在分布高度重合且有显著遗传分化的两个种群，即中型群和微型群。中型群和微型群之间的遗传差异达到了种间分化的水平，提示体型较大、具有背部发光器的中型群鸢乌贼（典型鸢乌贼）与体型较小、背部发光器缺失的微型群鸢乌贼可能是两个相互独立的种类。 Abstract:In the present study, the population differentiation of the purpleback flying squid () in the South China Sea was examined based on mitochondrial ND2, COI, and 16S rDNA sequences, using samples collected between September 2012 and September 2015. Phylogenetic analysis revealed two significantly divergent monophyletic groups corresponding to the "medium form" and the "dwarf form, " but no geographical lineages corresponding to the sampling localities or seasonal groups were found. The Analysis of Molecular Variance also revealed significant genetic differentiation between the "medium form" and the "dwarf form" (<0.0001), while no genetic variance between either geographic populations or seasonal groups was found. The genetic diversity analysis showed that both the "medium form" and the "dwarf form" of in the South China Sea were characterized by high haplotype diversity (0.9465 and 0.8545) and low nucleotide diversity (0.0051 and 0.0021). The genetic distance between the ‘medium form’ and the "dwarf form" based on ND2, COI, and 16S sequences were 14.0%, 9.6%, and 8.8%, respectively. The genetic distances between the two forms were considerably larger than the genetic distances within each of the two forms (<1%). It was demonstrated that two divergent populations of were sympatrically distributed in the South China Sea, i.e. the "medium form" and the "dwarf form." The genetic differentiation between these two populations was similar to that among separate species within Ommastrephidae, which indicated that the two morphologically distinct forms of the purpleback flying squid, namely the "medium form" (middle sized, with a photophore) and the "dwarf form" (small sized, without a photophore), are two distinct species. 参考文献 相似文献 引证文献

Taxonomic notes on Anthomedusae (Cnidaria: Hydrozoa: Hydroidomedusa) from the south-central South China Sea, with a new genus and four new species

This study describes and illustrates four new species Laticanna nanhaiensis Xu, Huang and Wang, gen. nov. and sp. nov., Protiaropsis gemmifera Xu, Huang and Du, sp. nov., Merga nanhaiensis Xu, Huang and Guo, sp. nov. and Rhabdoon apiciloculus Xu, Huang and Du, sp. nov. based on specimens from the south-central South China Sea. Additionally, keys to known genera of family Bythotiaridae and species of genera Protiaropsis, Merga, and Rhabdoon are described. All type specimens are deposited in the South China Sea Fisheries Research Institute, Chinese Academy of Fishery Science.

Correlation and path analyses of quantitative traits in different shell color F6 lines of pearl oyster ( Pinctada fucata )

PDF HTML阅读 XML下载 导出引用 引用提醒 合浦珠母贝不同壳色选育系F6数量性状的相关性和通径分析 DOI: 作者: 作者单位: 1. 中国水产科学研究院南海水产研究所, 农业农村部南海渔业资源开发利用重点实验室, 广东 广州 510300;2. 天津农学院 水产学院, 天津市水产生态及养殖重点实验室, 天津 300384 作者简介: 张景晓(1990-),男,博士研究生,从事贝类遗传育种研究.E-mail:jingxiao2000@163.com 通讯作者: 中图分类号: S917 基金项目: 国家自然科学基金项目（31772843）；青岛市产业培育计划项目（17-3-3-64-nsh）；山东省科技发展计划项目（2016ZDJ-S06A06）. Correlation and path analyses of quantitative traits in different shell color F6 lines of pearl oyster (Pinctada fucata) Author: Affiliation: 1. Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. College of Fishery Science, Tianjin Agriculture University;Tianjin Key Laboratory of Aquaculture, Tianjin 300384, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为深入了解不同壳色合浦珠母贝（）形态性状与体重间的关系，为亲贝的选择提供策略，本研究使用合浦珠母贝传统壳色、金壳色、白壳色、红壳色和黑壳色5种壳色选育系F6各1000只个体的性状数据进行通径分析和聚类分析。测量的性状包括壳长（SL，mm）、壳高（SH，mm）、壳宽（SW，mm）、绞合线长（HL，mm）和体重（BW，g）。结果显示，5种壳色合浦珠母贝所有形态性状与体重间的相关系数均达到极显著（<0.01）。通径分析表明，壳长对传统壳色和白壳色贝体重的直接影响最大，壳高对金壳色和红壳色贝体重的直接影响最大，壳宽对黑壳色贝体重的直接影响最大。利用多元回归方法构建不同壳色合浦珠母贝形态性状与体重（BW，g）间的回归方程，其中传统壳色：BW=-24.999+0.467SL+0.387SH-0.259SW+0.244HL；金壳色：BW=-38.661+0.305SL+0.477SH+0.242SW+0.375HL；白壳色：BW=-4.130+0.332SL+0.300SH-0.307SW+0.088HL；红壳色：BW=-27.307+0.327SL+0.321SH+0.252SW+0.305HL；黑壳色：BW=-40.921+0.278SL+0.335SH+1.076SW+0.269HL。聚类分析显示，传统壳色与金壳色形态特征相近，而白壳色、红壳色和黑壳色形态特征相近。 Abstract:To determine the effect of main morphological traits on the body weight of and to offer strategies for parent selection during the breeding of , the correlations between the morphometric attributes and body weight of were explored by the correlation, path, and regression analyses. One thousand individuals from each of traditional shell, golden shell, white shell, red shell, and black shell oysters were randomly sampled to measure their body weight (BW, g) and four morphometric attributes, including the shell length (SL, mm), shell height (SH, mm), shell width (SW, mm), and hinge length (HL, mm). The correlation coefficients among all variables were calculated. The path coefficients were calculated by setting the body weight as a dependent variable and other attributes as independent variables via stepwise elimination. The results showed that the four morphometric attributes of the five kinds of oysters extremely significantly (<0.01) correlated with body weight. The shell length presented the highest correlation with the body weight of traditional, white, and red shell oysters, and the shell height showed the highest correlation with the body weight of golden and black shell oysters. The results of the path coefficient analysis showed that the shell length of traditional and white shell oysters, the shell height of golden and red shell oysters, and the shell width of black shell oysters showed the highest correlation with body weight, and exhibited predominant direct effect and determinacy on the body weight for . The multiple regression equations were obtained to estimate body weight as traditional shell golden shell color:BW=-38.661+0.305SL+0.477SH+0.242SW+ 0.375HL; white shell red shell color:BW=-27.307+0.327SL+ 0.321SH+0.252SW+ 0.305HL; black shell color:BW=-40.921+0.278SL+0.335SH+1.076SW+0.269HL. The clustering results showed that the morphological traits were more similar between the traditional and golden shell oysters and between the white, red, and black shell oysters. 参考文献 相似文献 引证文献

DNA barcoding technology to identity spawn from the Jiangmen marine environment in summer

PDF HTML阅读 XML下载 导出引用 引用提醒 基于DNA条形码技术对江门沿岸海域夏季鱼卵的鉴定 DOI: 作者: 作者单位: 1. 中国水产科学研究院南海水产研究所, 农业农村部南海渔业资源开发利用重点实验室, 广东 广州 510300;2. 上海海洋大学 水产与生命学院, 上海 201306 作者简介: 张楠(1987-),男,助理研究员,从事水产种质资源研究.E-mail:zhangnhs@163.com 通讯作者: 中图分类号: S917 基金项目: 科技部科技基础性工作专项（2013FY110700）；中国水产科学研究院中央级公益性科研院所基本科研业务费专项（2013A11）；农业部重大财政专项（NFZX2013）；国家科技基础条件平台建设运行项目（2017DKA30470）. DNA barcoding technology to identity spawn from the Jiangmen marine environment in summer Author: Affiliation: 1. Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. College of Aqua-life Science and Technology, Shanghai Ocean University, Shanghai 201306, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:以江门沿岸海域夏季采集到的鱼卵研究对象，利用DNA条形码技术分析鉴定鱼卵种类。本研究获得鱼卵个体有效线粒体COI序列信息217个，测序成功率为68.5%。经BOLD数据库比对分析，成功鉴定鱼卵5目14科19属20种（未知种2种）；种内遗传距离为0~0.006，平均遗传距离为0.002，种间遗传距离为0.149~0.325，平均遗传距离为0.255，种间遗传距离为种内遗传的128倍；鱼卵样品以鲈形目数量最多，占51.8%；鲱形目次之，占24.8%；其中鱼卵优势种为黄斑鲾（Megalaspis cordyla）、粗鳞鮻（Harpadon nehereus）、亚洲鱚（）。本次调查川山群岛东部海域获得鱼卵数量、鱼卵种类数均最多，是江门沿岸海域日本鳀、龙头鱼的主要产卵场；黄茅海、镇海湾西部水域均未获得鱼卵，可能与水域环境变化及陆源污染导致产卵环境破坏、亲体量减少有关。该研究结果揭示了江门沿岸海域夏季鱼卵分布格局，为其制定有效的产卵场保护措施提供依据，同时表明DNA条形码技术能有效地对鱼卵进行种类鉴定，可被广泛地应用于我国沿海海域鱼卵鉴定工作。 Abstract:The main purpose of this study was to analyze and identify the species of fish eggs from the Jiangmen marine environment in summer, based on DNA barcoding technology. In the present study, we acquired a total of 217 effective mitochondrial COI sequences from fish eggs, and the success rate of sequencing was up to 68.5%. After the alignment of the BOLD database, we found that besides 2 species, a total of 5 orders, 14 families, 19 genera, and 20 species were identified. Statistical analyses showed that the interspecific genetic distances were 0~0.006, and mean interspecific genetic distance was 0.002, whereas the intraspecific genetic distances were 0.149~0.325, and mean intraspecific genetic distance was 0.255, which was 128-fold higher than the former. Among the fish eggs, the most abundant order was Perciformes (51.8%), followed by Clupeiformes (24.8%); the most abundant species was Megalaspis cordyla, , and . In this investigation, the most abundant fish eggs were found in eastern Chuanshan Archipelago, both in numbers and species. The Chuanshan Archipelago is also known as the main spawning site of . However, nearly no fish eggs were found in the Huangmao Bay area or western Zhenhai Bay, possibly owing to environmental disruption and a decrease of effective parent number, triggered by environmental variation and contamination from land-sourced pollutants. In general, we revealed the distribution pattern of fish eggs from the Jiangmen marine environment in summer, which provided a theoretical basis for developing effective protective measures for spawning sites. Meanwhile, the results also showed that DNA barcoding technology could be effective and broadly applied to identify the species of fish eggs in the marine habitats of our country. 参考文献 相似文献 引证文献

Euphausia superba swarm characteristics in the South Orkney Islands by the echogram of acoustic survey

PDF HTML阅读 XML下载 导出引用 引用提醒 基于声学映像的南奥克尼群岛海域南极磷虾集群特征 DOI: 作者: 作者单位: 1. 上海海洋大学海洋科学学院, 上海 201306;2. 上海海洋大学大洋渔业资源可持续开发教育部重点实验室, 上海 201306;3. 上海海洋大学国家远洋渔业工程技术研究中心, 上海 201306;4. 中国水产科学院南海水产研究所, 广东 广州, 510300 作者简介: 王腾(1989-),博士研究生,研究方向为渔业资源声学评估.E-mail:twangshanghao@163.com 通讯作者: 中图分类号: S931 基金项目: 国家自然科学基金项目（41776185，41606210）；国家重点研发计划项目（2018YFC1406801）；农业部南极海洋生物资源开发利用项目（D8002-18-0097）. Euphausia superba swarm characteristics in the South Orkney Islands by the echogram of acoustic survey Author: Affiliation: 1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;2. The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China;3. National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China;4. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为确定南奥克尼群岛海域南极磷虾（）集群特征，本研究根据2017年3-4月我国南极磷虾探捕项目采集的断面声学数据，使用通用声学数据后处理软件，研究了该海域的南极磷虾集群特征信息。本研究共检测并提取了2539个磷虾集群的高度、长度、分布深度、集群间距、集群面积及集群磷虾密度信息，其中白天集群1389个，夜晚集群1150个。通过集群特征值的统计，将该海域集群分为3类。聚类A的虾群密度最大[（19.24±27.00） ind/m3]，聚类B的虾群最深[（174.74±53.30） m]，聚类C的虾群面积最大[（2868.62±2149.75） m2]。聚类A和聚类B的集群长度无显著性差异（>0.05）。A类集群主要分布在南奥克尼群岛北部及西北部的深水区，水深>1000 m。B类和C类集群在整个调查海域均有分布，其中B类集群多分布在群岛大陆架海域，水深<200 m。不同区域的集群分布信息不同，离岛屿最远的东西两个断面集群较少，分布比较分散。本研究结果表明大部分的磷虾个体位于少数的大型集群中，集群磷虾密度和集群间距间存在正相关关系；未来通过磷虾集群与外界因子（环境因子，捕食者）相关性的研究，可以帮助我们更为准确地了解集群结构与形成机制，预测磷虾资源分布。 Abstract:Knowledge about swarm dynamics and underlying causes is essential to understand the ecology and distribution of . We examined swarms across the South Orkney Islands in March and April 2017 using the Simrad EK60 (38 and 120 kHz) echosounder, concurrent with net sampling. The acoustic data were analyzed by applying a swarm-identification algorithm, and then filtering out all non-krill targets. A total of 2539 krill swarms with swarm characters including swarm height and length, packing density, swimming depth, and inter-swarm distance were extracted, of which 1389 were daytime swarms and 1150 night swarms. Compared with those of the night swarms, krill aggregated in deep waters during the daytime with lower packing density and smaller inter-swarm distance. There were significant differences between day and night krill swarms. Through the multivariate analysis, the krill swarms were divided into three categories, which differed in both their dimensions and packing density. Group A presented the highest swarm density[(19.24±27.00) ind/m3], Group B swarms presented the deepest distribution depth[(174.74±53.30) m], Group C presented the largest swarm area[(2868.62±2149.75) m2] with the longest swarm length[(258.76±322.88) m]. There was no significant difference in swarm length between Groups A and B and no significant difference in swarm depth between Groups A and C. Group A swarms were mainly distributed in deep water areas in the north and northwest regions of the South Orkney Islands at a depth of >1000 m, and mainly occurred during daytime. Groups B and C swarms were distributed throughout the survey area; Group B swarms were aggregated in the continental shelf at a water depth of <200 m. The results suggest that the majority of krill were contained within a minor fraction of the total number of swarms, and there was a positive correlation between packing density and inter-swarm distance. The results also provide valuable information on the distribution of krill swarms in this area and basic data for the current feedback krill resource management of Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). In the future, studies on the correlation between krill swarms and external factors, such as environmental factors and predators, can help understand the swarm structure and formation mechanism more accurately and predict the distribution of krill resources. 参考文献 相似文献 引证文献

Comparative study of Jiaozhou Bay ecosystem based on an Ecopath model

PDF HTML阅读 XML下载 导出引用 引用提醒 基于Ecopath模型的胶州湾生态系统比较研究 DOI: 作者: 作者单位: 1. 中国水产科学研究院 南海水产研究所, 农业部南海外海渔业开发重点实验室, 广东 广州 510300;2. 上海海洋大学 海洋科学学院, 上海 201306;3. 中国水产科学研究院 黄海水产研究所, 山东 青岛 266071 作者简介: 马孟磊(1992-),男,硕士研究生,从事渔业资源和海洋生态研究.E-mail:nysymml@163.com 通讯作者: 中图分类号: S931 基金项目: 国家重点基础研究发展计划项目（2015CB452904）；广东省自然科学基金项目（2015A030313785）；广州市科技计划项目珠江科技新星专项（2014J2200020）. Comparative study of Jiaozhou Bay ecosystem based on an Ecopath model Author: Affiliation: 1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;3. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:文章根据2015-2016年胶州湾渔业资源与生态环境调查数据，并收集20世纪80年代胶州湾渔业资源数据，利用Ecopath with Ecosim 6.5（EwE）软件构建了由21个功能组组成的胶州湾1980-1982年和2015-2016年两个时期的Ecopath模型，比较分析了不同时期胶州湾生态系统结构和功能变化以及系统发育特征。研究结果显示，与1980-1982年生态系统相比，胶州湾2015-2016年生态系统中大型底层鱼类生物量减少，菲律宾蛤仔（）生物量提高，渔获物产出以菲律宾蛤仔为主，渔获平均营养级降低，系统能量转化效率从1980-1982年的15.83%提高到2015-2016年的16.35%，能量流动始终以牧食食物链为主。关键种分析表明，胶州湾生态系统两个时期的关键种均为菲律宾蛤仔。此外，与1980-1982年生态系统相比，2015-2016年胶州湾生态系统整体规模增大，净生产量提高5倍，系统总初级生产量与总呼吸量的比值由1980-1982年的1.267提高到2015-2016年的2.518，系统连接指数、杂食指数与Finn's循环指数和平均路径长度均减小，说明在过去30多年胶州湾生态系统成熟度和稳定性不断降低，发育过程出现由成熟向幼态的逆行演替现象，目前处于不稳定的幼态阶段。 Abstract:Based on survey data from fishery resources and on the ecological environment in the Jiaozhou Bay during 2015-2016 and 1980-1982, we constructed ecosystem models of Jiaozhou Bay for these two periods using Ecopath with Ecosim 6.5 software. The models of the Jiaozhou Bay consisted of 21 functional groups. Based on the two models, we compared and analyzed the differences in ecosystem structure, function, and attributes. The trophic structure of the Jiaozhou Bay ecosystem in 2015-2016 had changed, with a decrease in the proportion of top predator biomass and an increase in the proportion of R. philippinarum, and the mean trophic level of fishery catch had reduced. The energy flow of the Jiaozhou Bay ecosystem was mainly dominated by a grazing food chain, and the system-energy-transfer efficiencies increased from 15.83% in 1980-1982 to 16.35% in 2015-2016. Analysis of the keystones species for Jiaozhou bay ecosystem indicated that is a keystones species in both the 1980-1982 and 2015-2016 periods. Compared with the 1980s ecosystem, the scale of the Jiaozhou Bay system had increased and the net system production increased by 5 times by 2015. The parameters of the ratio of total primary production to total respiration increased from 1.267 in 1980-1982 to 2.518 in 2015-2016. In addition, the connectance index, system omnivory index, and Finn's cycling index decreased from the 1980s to 2015-2016. In conclusion, the maturity and stability of the Jiaozhou Bay ecosystem has been reduced over the past 30 years, and the system has shown a trend moving from a mature stage to an immature stage. In short, the Jiaozhou Bay ecosystem is currently in an unstable, young stage. 参考文献 相似文献 引证文献

Assessment of natural mortality coefficients in fish stocks: a review

PDF HTML阅读 XML下载 导出引用 引用提醒 鱼类自然死亡系数评估研究进展 DOI: 作者: 作者单位: 1. 中国水产科学研究院南海水产研究所, 农业部外海渔业开发重点实验室, 广东省渔业生态环境重点实验室, 广东 广州 510300;2. 上海海洋大学 海洋科学学院, 上海 201306 作者简介: 耿平(1993-),男,硕士研究生,从事渔业资源评估研究.E-mail:bsg1030@live.com 通讯作者: 中图分类号: S931 基金项目: 国家自然科学基金项目（31602157）；农业部财政专项“南海北部近海渔业资源调查”项目（2014-2018）；公益性行业（农业）科研专项经费项目（201403008）. Assessment of natural mortality coefficients in fish stocks: a review Author: Affiliation: 1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture;Key Laboratory of Fishery Ecology and Environment, Guangdong Province;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:自然死亡系数是渔业资源评估中不可或缺的重要参数，其准确度直接决定了资源评估结果的可靠性，进而影响渔业管理策略的制定。本文从生活史参数、标志回捕和年龄结构3个方面列举了国内外自然死亡系数的常用评估方法，讨论了相关方法的优缺点及影响因素，并以犬齿牙鲆（）和中国近海鱼类为例对比分析不同模型的计算结果。在此基础上，着重介绍了Pauly经验公式在中国近海主要经济鱼类自然死亡系数评估中的应用进展及存在问题。根据渔业资源调查和研究数据现状，认为现阶段使用Pauly经验公式评估中国近海经济鱼类自然死亡系数具有积极作用。 Abstract:Natural mortality coefficient () is a key parameter in fisheries stock assessment. Its accuracy directly determines the reliability of assessment results and also influences the establishment of fisheries management. Most mathematical models of fish stock dynamics incorporate , either directly or indirectly. Fishery scientists have explored accurate estimates of for a long time, in order to develop a more precise understanding of fish populations and to establish a more scientific basis for managing fisheries resources and sustainable development. The present study introduces and evaluates the most common models for estimating natural mortality coefficients for fish populations from three aspects, namely life-history parameters, tag-return, and age-structure. The first approach to estimate the instantaneous rate of natural mortality in fish stocks is based on the observation that is strongly correlated with life history parameters, such as maximum observed age, age at reproductive maturity, asymptotic fish length, and growth rate. The Pauly empirical equation, Gislason empirical equation, and Tanaka's maximum observed age's method are among the most commonly used methods for assessing inshore fisheries in China. By classifying tagging data, based on catch per unit effort, size at release, and the probability of tag loss, Chapman, Hampton, and Treble have each constructed their own models, and some scholars have combined these methods to develop a model that is superior to any of the individual models. The assessment results of using tag-return methods would have a high reliability, but the huge costs of investigation, lower credibility of recapture, and prior model assumptions contribute to poor generality. Considering that age is the potentially most important factor affecting estimates of , virtual population analysis (VPA) and cohort analysis (CA) are established using catch-at-age data. These methods could be used to reliably estimate fish stocks with long-term catch data. However, considering the incomplete and inaccurate statues of historical catch data in Chinese coastal fishes, the practicality of the VPA or CA models is relatively low. Meanwhile, taking and some coastal fish stocks as examples, this study compared estimation results through different methods and found that Pauly empirical equation is more reasonable to calculate . Then, this paper introduced the misapplications of Pauly empirical equation in inshore fisheries of China. The main misapplications were equation error, unit error and calculation mistake. According to the limited data and fishery exploitation status, we suggest that Pauly empirical equation has a positive meaning to assess the for major economic fish stocks in China. 参考文献 相似文献 引证文献

Population genetic structure of Thamnaconus septentrionalis in China's coastal waters based on mitochondrial Cyt b sequences

PDF HTML阅读 XML下载 导出引用 引用提醒 基于线粒体Cyt b基因序列的绿鳍马面鲀6个野生群体的遗传结构分析 DOI: 作者: 作者单位: 1. 中国水产科学研究院黄海水产研究所, 山东 青岛 266071;2. 农业农村部外海渔业开发重点实验室, 广东 广州 510300;3. 中国水产科学研究院南海水产研究所, 广东 广州 510300;4. 青岛海洋科学与技术国家实验室, 海洋渔业科学与食物产出过程功能实验室, 山东 青岛 266071;5. 上海海洋大学 水产与生命学院, 上海 201306 作者简介: 边力(1988-),助理研究员,博士,研究方向为鱼类遗传育种.E-mail:bianli@ysfri.ac.cn 通讯作者: 中图分类号: Q347;S931.5 基金项目: 农业部外海渔业开发重点实验室开放课题（LOF 2017-05）；中国水产科学研究院黄海水产研究所级基本科研业务费项目（20603022017014）. Population genetic structure of Thamnaconus septentrionalis in China's coastal waters based on mitochondrial Cyt b sequences Author: Affiliation: 1. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China;2. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture and Rural Affairs, Guangzhou 510300, China;3. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;4. Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;5. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:利用线粒体细胞色素b（cytochrome b，Cyt ）6个野生群体（大连、秦皇岛、蓬莱、日照、舟山和汕头）的遗传多样性和群体遗传结构。结果显示，在176个个体915 bp的Cyt 部分序列中共检测到32个变异位点和30个单倍型；6个群体的单倍型多样性为0.883~0.953，核苷酸多样性0.0032~0.0039；群体间固定指数较小，呈中低度分化；AMOVA分析表明，遗传变异主要来源于群体内，群体间遗传分化未达到显著水平。群体历史动态分析表明，绿鳍马面鲀在16.9万~42.2万年前经历种群扩张。总体上，各群体间的遗传分化较小，并未形成相应的地理支系，推测黑潮的输送作用以及绿鳍马面鲀的洄游习性维持了各群体间高强度的基因交流；中更新世中晚期的气候波动对绿鳍马面鲀的种群扩张以及地理分布格局可能具有重要影响。本研究结果加深了人们对于绿鳍马面鲀资源情况的认识，为绿鳍马面鲀资源的保护和合理利用提供了理论依据。 Abstract:Genetic data have aided fishery conservation research and management by facilitating the detection of genetically distinct populations, the measurement of genetic connectivity, and the identification of the risks associated with demographic change and inbreeding. is an important economic marine fish species in China and inhabits in the Bohai Sea, Yellow Sea, East China Sea and South China Sea. has become an important fishing target in the East China Sea since 1974. Its annual catches were once second only to has declined sharply since 1990 due to overfishing and ocean environmental change. To provide better protection and effective recovery for this species, it is urgent to evaluate its population structure and genetic diversity. However, population surveys of in China's coastal waters were rare. No population structure research based on molecular makers was available. In this study, we amplified the partial mitochondrial Cyt gene sequences of 176 individuals from six populations (Dalian, Qinhuangdao, Penglai, Rizhao, Zhoushan, and Shantou). The results showed that 32 polymorphic nucleotide sites and 30 haplotypes were detected among all the Cyt sequences. The haplotype diversity ranged from 0.883 to 0.953, and the nucleotide diversity was 0.0032-0.0039. This genetic diversity pattern was probably caused by a recent demographic expansion in the Pleistocene, a rapid population growth after 1970, and the adaptable biological characteristics of . Although the haplotype diversity was high, the genetic diversity is still vulnerable to overfishing. AMOVA analysis showed that the genetic differentiation of mainly occurred within the population variation. The genetic differentiations among populations were weak and no groups were identified. The high gene exchange among populations is probably caused by the seasonal migration behaviors of the adults and the long-distance transportation of juveniles by the Kuroshio (Black) Current. Demographic history analysis showed that the six populations experienced rapid population growth 0.17-0.42 Mya. This time point was within the middle Pleistocene. During this period, sea levels changed dramatically due to unstable temperatures. We speculate that the sea level changes during the middle Pleistocene might have had significant influence on the population expansion of . To our knowledge, this is the first population genetics research on in China's coastal waters based on molecular markers. This study could deepen our understanding of how to optimize the utilization of the natural resources of . 参考文献 相似文献 引证文献

Preliminary study on the nautical area scattering coefficient and distribution of mesopelagic fish species in the central-southern part of the South China Sea

PDF HTML阅读 XML下载 导出引用 引用提醒 南海中南部中层鱼资源声学积分值及时空分布初探 DOI: 作者: 作者单位: 中国水产科学研究院 南海水产研究所, 农业部南海渔业资源开发利用重点实验室, 农业部南海渔业资源环境科学观测实验站, 广东 广州 510300 作者简介: 张俊(1984-),男,助理研究员,从事海洋渔业声学研究.E-mail:zkexin0901@126.com 通讯作者: 中图分类号: S932 基金项目: 农业部财政专项项目（NFZX2013）；国家重点基础研究发展计划项目（2014CB441500）；农业部财政专项项目（2009-2016）；中央级公益性科研院所基本科研业务费专项资金项目（2014TS18）；农业部南海渔业资源开发利用重点实验室开放基金（FREU2016-01）. Preliminary study on the nautical area scattering coefficient and distribution of mesopelagic fish species in the central-southern part of the South China Sea Author: Affiliation: South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture;Scientific Observing and Experimental Station of South China Sea Fishery Resources & Environments, Ministry of Agriculture, Guangzhou 510300, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:本研究利用Simrad EK60科学探鱼仪（38 kHz）于2013年春季和2014年春季采集的南沙和中沙、西沙海域渔业声学数据，结合中层拖网取样，采用回声积分法研究了南海中南部中层鱼的资源量及其时空分布特征。结果显示，2014年春季中、西沙海域9次中层拖网作业共捕获和鉴定鱼类和头足类79种，隶属于3纲16目37科60属，其中硬骨鱼纲的种类最多（65种），鞘亚纲次之（13种），软骨鱼纲1种，硬骨鱼纲中巨口鱼科、灯笼鱼科和钻光鱼科的种类最多，分别有20种、13种和6种；南沙海域中层鱼声学积分值（nautical area scattering coefficient，m2/nmi2）显著低于中沙、西沙及邻近海域，前者夜间向上迁移的强度高于后者；2013年春季南沙海域夜间10~200 m和白天200~1000 m声学积分值构成没有显著差异（<0.01）；南沙海域白天200~1000 m不同纬度组间中层鱼声学积分值构成有极显著差异（<0.01）；南海中南部中层鱼声学积分值是（2387±601）m2/nmi2，基于现存公开发表的中层鱼的声学目标强度数据并取其均值，推算南海中南部中层鱼资源量是（8200±2100）万t。研究表明，南海中南部中层鱼声学积分值比全球平均值高约29.2%，可能是我国未来具有开发价值的大宗生物资源。 Abstract:Two acoustical surveys were conducted using a Simrad EK60 scientific echosounder (38 kHz split-beam transducer) in the Nansha, Zhongsha, and Xisha areas during spring 2013 and 2014 to explore the abundance and spatiotemporal distribution of mesopelagic fish species in the central-southern part of the South China Sea. The abundance and distribution were estimated using the echo-integration method based on acoustic data and mid-water trawl samples. We identified 79 fish and squid species in 60 genera, 37 families, 16 orders, and 3 classes in the Zhongsha and Xisha areas during spring 2014. Osteichthyes was the most abundant (65 species), followed by Coleoidea (13 species), and Chondrichthyes was only represented by one species. Stomiidae, Myctophidae, and Gonostomidae (Osteichthyes) were the most abundant families and were represented by 20, 13, and 6 species, respectively. The nautical area scattering coefficient (NASC, m2/nmi2) of mesopelagic fish in the Nansha area was much lower than that in the Zhongsha and Xisha areas, and the former presented more obvious ascending intensity at night. The NASC composition of fish living in 10-200 m depth range at night was not different from that of fish living in 200-1000 m during the day in the Nansha area in spring of 2013, but the difference was significant in the Zhongsha and Xisha areas in spring of 2014. The NASC composition values of fish living in 200-1000 m during the day for the different latitude scopes in the Nansha, Zhongsha, and Xisha areas were significantly different. The NASC of mesopelagic fish in the central-southern part of the South China Sea was (2387±601) m2/nmi2. We estimated the abundance of mesopelagic fish in the central-southern part of the South China Sea to be (82±21) million tons based on the existing mesopelagic fish target strength parameters and the median value. These results indicate that the NASC of mesopelagic fish in the central-southern part of the South China Sea was 29.2% higher than the global average. Mesopelagic fish are a potential major strategic fishery resource and are very important for China to develop. 参考文献 相似文献 引证文献

Differences in high temperature stress and growth between southern and northern populations of Haliotis discus hannai

PDF HTML阅读 XML下载 导出引用 引用提醒 皱纹盘鲍南北方群体的高温应激和生长差异 DOI: 作者: 作者单位: 1. 中国水产科学研究院 南海水产研究所, 农业部南海渔业资源开发利用重点实验室, 广东 广州 510300;2. 天津农学院 水产科学系, 天津 300384 作者简介: 姚托(1984-),男,博士,助理研究员,主要从事贝类遗传育种方面研究.E-mail:yao-tuo@163.com 通讯作者: 中图分类号: S94 基金项目: 现代农业产业技术体系建设专项资金项目（CARS-48）；广东省海洋渔业科技推广专项（A201301F04）；中央级公益性科研院所基本科研业务费专项资金项目（2014TS29）. Differences in high temperature stress and growth between southern and northern populations of Haliotis discus hannai Author: Affiliation: 1. Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture;South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;2. Department of Fishery Science, Tianjin Agricultural University, Tianjin 300384, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为研究皱纹盘鲍（ Ino）经过杂交和南方养殖后，南方群体（杂交群体）是否与北方群体（自交群体）在适温性上是否产生了差异，从而是否更加适应南方高温环境，本研究开展了皱纹盘鲍南北方群体的高温应激和南方地区养殖实验。高温应激实验中：经过30℃应激后，南方群体恢复期所有取样组织中HSP70在0 h的表达量都显著高于北方群体（<0.05），HSP90在外套膜和肝胰脏中的表达量也高于北方群体（鳃中的表达量略低但差异不显著）；经过33℃应激后，南方群体HSP70和HSP90在足、外套膜和鳃0 h表达量都显著高于北方群体（<0.05）。养殖实验中：从12月开始至翌年2月水温不超过17.11℃，为北方群体的快速生长期，生长快于南方群体；从3月开始，水温逐渐超过20℃，北方群体生长慢于南方群体，同时北方群体开始出现死亡现象，7月北方群体大量死亡，存活数量不足30粒。综合HSP70、HSP90的高温应激表达和养殖实验结果，可以得出：皱纹盘鲍经过杂交和南方累代养殖后，适温上限有所提高，已与北方群体产生较大差异，可适应较高的水温；30℃水温刺激下南北方群体的HSP70的相对表达量与对高温的耐受性具有正相关性，可以在鲍的抗高温选育种中进行辅助筛选。 Abstract:Hybrid abalone () have been cultured in southern China for many years. Two experiments were performed (high temperature stress and culture in a southern sea area) to study whether a southern population (hybrid population) of Pacific abalone has different high temperature tolerance and is more adapted to that environment than a northern population (inbred population). After a 30℃ stress or in the high temperature stress experiment, relative expression of heat shock protein (HSP) 70 in the southern population at 0h of the recovery phase was significantly higher in the foot, mantle, gill, and hepatopancreas than those in the northern population (<0.05). At the same time, relative expression of HSP90 in the southern population was significantly higher in the mantle and hepatopancreas than that in the northern population. The relative expression levels of HSP70 and HSP90 in the southern population after the 33℃ stressor were significantly higher in the foot, mantle, and hepatopancreas at 0 h in the recovery phase than those in the northern population (<0.05). In another experiment, the most rapid growth period in the northern population occurred from December to February;abalone in the northern population grew faster than those in the southern population and water temperature was no higher than 17.11℃ at this time. Water temperature eventually exceeded 20℃ in March, when the northern population grew slower than the southern population and mortality increased. Less than 30 abalone in the northern population remained in July. Taken together, we conclude that because hybrid abalone have been cultured for many generations in southern China, they became better adapted to higher water temperature. The relative expression levels of HSP70 in the two populations were positively correlated with heat resistance after the 30℃ stressor. These data could be useful for assisted selection in an abalone high temperature resistance breeding program. 参考文献 相似文献 引证文献

Problems and Countermeasures on the Fishery Development in the South China Sea*

The South China Sea is one of the most abundant fishery areas in the world, which is a typical multi fish species area. The South China Sea Fisheries can be divided into four parts, the northern continental shelf offshore fisheries, Xisha Qundao, Zhongsha Qundao and Nansha Qundao coral reef fisheries, the northern slope fisheries and Southern Ocean, rising flow fisheries. In recent years, the ecological environment of the South China Sea has been severely damaged, resulting in the fisheries resources becoming poor increasingly, in the meantime, there exist other problems, such as the effect and validity of unilateral management of the fishery resources is still limited, bilateral and multilateral cooperation are not yet mature.

南海南部悬浮颗粒物脂肪酸组成分析

Some fatty acids( FA) are specific to individual classes of organisms and attempts to trace organic materials in the ocean. Fatty acid markers have been widely used to trace or confirm predator-prey relationships so as to illustrate the key trophic linkages in the marine ecosystem. Suspended particulate matter from 0m,75 m and 150 m were collected to better understand the fatty acid composition and its fatty acid biomarkers in the southern South China Sea. The cruise was conducted by"NanFeng"RV from February 22 to March 30,initiated by South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences. The range of FA contents were 9.9—15.65 μg /L,10.45 —14.45 μg /L and 9.65—16.45 μg /L at 0 m,75 m and 150 m,respectively. FA contents indicate that vertical change of FA contents was unobvious.Deep chlorophyll a( Chl a) maximum phenomenon was popular in South China Sea,thus FA /Chl a concentration varied in the water column obviously. The ratio of FA /Chl a was higher than 70 at surface and 150m layer,while lower than 30 at75m layer( except A7). Saturated fatty acids( SFA) and mono-unsaturated fatty acids( MUFA) dominated total fatty acid contents in all SPM from each layer. Major SFA was C16: 0,C18: 0 and C12: 0. Major MUFA were C14: 1n3,C16: 1n7 and C16: 1n9,and major polyunsaturated fatty acids( PUFA) were C18: 2n6 and C22: 2n6. Principle components analysis( PCA) revealed that PC1 was positively related to C16:0,C18:0 and C20:0 concentrations,so PC1 maybe the indicator of phytoplankton and debris. PC2 may be represented the information of zooplankton. Within five FA biomarkers,C16: 1n7 /C16: 0 was positively related to C16: 1 /∑FA,while negatively related to ∑C18 /∑FA,so the combination of C16: 1n7 /C16: 0 and C16: 1 /∑FA can be considered as FA biomarker of diatoms,and ∑C18 /∑FA also can be applied to indicate dinoflagellate.

Notes on shark and ray types at the South China Sea Fisheries Research Institute (SCSFRI) in Guangzhou, China.

Most of the shark and ray type material at the South China Sea Fisheries Research Institute (SCSFRI) in Guangzhou, China was examined during a museum visit by the senior author in 2009. The status of the shark and ray species described from the South China Sea in the 1980s and deposited in this collection is discussed. Squalus acutirostris is considered a junior synonym of Squalus mitsukurii from the western North Pacific. Centrophorus ferrugineus is considered a junior synonym of Centrophorus squamosus. Centroscymnus macrops is confirmed as a junior synonym of Centroscymnus coelolepis. Scymnodon niger is confirmed as a junior synonym of Zameus squamulosus. Isistius labialis is considered a synonym of Isistius brasiliensis. Halaelurus immaculatus is confirmed as a valid species of the genus Bythaelurus. Urolophus marmoratus is considered a junior synonym of the widespread Plesiobatis daviesi. Springeria nanhaiensis is a questionable synonym of Sinobatis borneensis, following previous researchers. Springeria stenosoma is considered as questionably valid but with further investigation into generic placement required. The validity of species with SCSFRI type specimens not examined in this study are also briefly discussed.