Chaeturichthys Stigmatias Research Articles

Interannual Variation of Ichthyoplankton Community Structure in the Yellow River Estuary, China

To understand the community structure dynamics of fish eggs and larvae in the Yellow River estuary, four trawl surveys were annually conducted between 2011 and 2014, including at 13 stations in 2011 and 18 stations between 2012 and 2014. A total of 2540 eggs and 143 larvae were collected during the four surveys, comprising 25 species, 8 orders, 16 families, and 20 genera. During the survey period, species numbers of eggs first decreased and then increased, while abundances first increased and then decreased. Larval species numbers exhibited the same trends as for eggs, while larval abundances fluctuated across the four years of the study. The primary species represented by the eggs were Konosirus punctatus, Sillago sihama, and Cynoglossus joyeri, while the larval species primarily comprised Amblychaeturichthys hexanema, Chaeturichthys stigmatias, and Engraulis japonicus. Cluster analysis of species compositions for eggs and larvae revealed the presence of four groups, wherein groups 1–3 comprised communities from 12, 3, and 2 stations, respectively, that were primarily distributed in the eastern part of the estuary. In contrast, group four only comprised communities from one station at the western part of the estuary near Bohai Bay. All biodiversity indices were lowest in 2012 and biodiversity of fish egg and larval communities were most correlated with the water depth among the parameters that were measured. Overall, interannual variation in the distribution and diversity of fish egg and larval communities in the Yellow River estuary reflected the responses of fish to environmental variability.

Development and characterization of microsatellite markers for Chaeturichthys stigmatias (Actinopterygii: Gobiiformes: Gobiidae) based on restriction site-associated DNA sequencing (RAD-seq)

Chaeturichthys stigmatias Richardson, 1844, a fish species of the family Gobiidae, is an offshore warm-temperate fish species and a dominant component of estuarine ecosystems. In this study, restriction site-associated DNA sequencing was adopted to analyze the traits of candidate microsatellite markers for C. stigmatias, and 30 polymorphic loci were developed. A total of 5631 microsatellites with primer fragments were detected, among which trinucleotide repeats (57.56% of the total simple sequence repeats) were the most abundant, followed by di- (23.30%), tetra- (11.79%), penta- (4.14%), and hexa- (3.21%) nucleotide repeats type. The numbers of alleles per locus ranged from 6 to 14 with the mean value of 10.4. The mean value of observed heterozygosity and the expected heterozygosity were 0.349 and 0.870, respectively. The microsatellite locus with the lowest polymorphic information content (PIC) was 0.749, which indicated that all sites were highly polymorphic (PIC > 0.50). This is the first microsatellite development and characterization of this species to be reported.

Larval Ecology of Gobiid Fishes in a Subtropical Embayment: Environmental Preferences and Spatiotemporal Habitat Partitioning

Larval ecology of gobiid fishes in Xiangshan Bay of the east coast of China was examined from ichthyoplanktonic data collected during 10 weekly cruises in spring–early summer of 2015. Particular attention was given to their environmental preferences and spatiotemporal habitat partitioning. A total of 87, 007 gobiid larval individuals, distributed in 9 species, were collected. The thermal and salinity preferences of 6 of the 9 gobiid larvae have been determined using a quotient-rule analysis. This work filled some gaps in larval ecology of these poorly studied gobiids. Temporal succession in gobiid larvae composition was strongly evident. The bay ecosystem was mainly occupied by Asian freshwater goby Acanthogobius ommaturus, branded goby Chaeturichthys stigmatias and tank goby Glossogobius giuris, with preferences for temperature bellow 19°C during April to early May, while striped sand goby Amoya pflaumi and burrowing goby Trypauchen vagina, which preferred water temperature above 22°C, predominated the larval assemblage in early June. With respect to spatial distribution, relatively little variation was detected among species. Most of gobiid larvae exhibited little obvious habitat preference except pinkgray goby Amblychaeturichthys hexanema and A. ommaturus, which distributed preferably in the inner zone and mouth of the bay ecosystem, respectively. Water temperature was the major structuring factor of gobiid larvae assemblage structure in the bay. The gobiid larvae exhibited to be particularly susceptible to the rapid rising temperature shocks. Sharp decline in the total abundance of gobiid larvae was detected with each rapid heating process. In addition, significant shift in larval fish composition occurred following the process. The results suggest that pattern of temperature increase in spring and early summer plays a vital role in recruitment success of the gobiid larvae.

Nutritional contribution of terrestrial organic carbon to four fish species in the Yellow River Estuary and adjacent coastal waters

Only a small amount of terrestrial organic carbon was found in the ocean organic carbon pool, though 0.40 Gt terrestrial organic carbon was transported to ocean via estuaries each year. This finding indicated that large quantity of terrestrial organic carbon was depleted in the estuaries and coasts, which provided additional materials and energy for the ecosystem. To investigate the material and energy supplement of terrestrial organic carbon transported by the Yellow River to the estuary and coastal system, the nutritional contribution of terrestrial organic carbon to four fish species: <italic>Acanthogobius ommaturus</italic>, <italic>Cynoglossus joyneri</italic>, <italic>Chaeturichthys stigmatias</italic>, <italic>Sardinella zunasi</italic>, was studied using multivariate analysis of similarity (MANOSIM) and stable isotope analysis in R (SIAR). In MANOSIM, the similarity carbon and nitrogen stable isotope in the temporal level was studied by the factors of species and seasons, and that in the spatial level was studied by the factors of species and stations. The similarity was judged by <italic>R</italic>. <italic>R</italic><0.25, similarity was high. 0.25≤<italic>R</italic>≤0.50, similarity was in the middle level. <italic>R</italic>>0.50, similarity was in the low level. In the study of SIAR, the nutritional sources of four fish species were considered as riverine, terrestrial and marine sources. The carbon stable isotope of riverine, terrestrial and marine source was (-30.0±0.4) ‰, (-26.0±0.4) ‰, and (-18.1±0.9) ‰ respectively. And the nitrogen stable isotope of riverine, terrestrial and marine source was (9.0±0.7) ‰, (1.0±0.7) ‰, and (6.0±1.2) ‰ respectively. Trophic enrichment factors (TEF) of carbon and nitrogen stable isotope was (1.1±1.3) ‰ and (2.8±1.4) ‰ respectively. We found that carbon and nitrogen stable isotope of four species showed no significant difference either in temporal level (<italic>R</italic>=0.08, <italic>P</italic><0.01) or in spatial level (<italic>R</italic>=0.19, <italic>P</italic><0.01) by MANOSIM. However, temporal and spatial variations of nutritional contribution of terrestrial organic carbon to four species were obvious. The nutritional contribution of terrestrial organic carbon was 8.7%, 7.3%, 4.3% and 32.0% higher in summer than that in autumn for <italic>Acanthogobius ommaturus</italic>, <italic>Cynoglossus joyneri</italic>, <italic>Chaeturichthys stigmatias</italic> and <italic>Sardinella zunasi</italic> respectively. And nutritional contribution of terrestrial organic carbon was 19.8%, 12.4%, 14.1% and 13.2% higher in estuary than that in coast for <italic>Acanthogobius ommaturus</italic>, <italic>Cynoglossus joyneri</italic>, <italic>Chaeturichthys stigmatias</italic> and <italic>Sardinella zunasi</italic> respectively. Temporal and spatial variations of Yellow River transporting terrestrial organic carbon may lead to variations.

Seasonal changes in fish diversity, density, biomass, and assemblage alongside environmental variables in the Yangtze River Estuary.

The present study used multivariate techniques, to analyze the fish species diversity and distribution patterns in order to determine the possible role of environmental parameters as drivers of fish community structure and composition in the Yangtze River Estuary (YRE). This analysis was conducted using data obtained in the YRE from February 2012 to December 2014. Analysis of the catch data showed that species composition, total density, and total biomass varied significantly between stations and seasons. Thirty-eight species belonging to 18 families were collected. Sciaenidae was the most dominant family accounting for 40.8% of total captured specimens. In descending order, Collichthys lucidus, Cynoglossus gracilis, Chaeturichthys stigmatias, and Lophiogobius ocellicauda dominated catches in the YRE. These four species constituted 64.2% of the total catches and showed average dissimilarities of 74.19% between stations and 81.3% between months. The highest number of fish specimens captured was recorded in August 2012 while the highest species richness was observed in December 2013. The mean fish density and biomass for the YRE was 0.35 individuals/m2 and 2.5g/m2, respectively. The mean density and biomass for the most important and dominant species changed significantly between stations and seasons. Canonical correspondence analysis indicated that salinity and chlorophyll-a were the key variables that structured the fish assemblage in the YRE. High total species density and biomass were recorded in high saline stations (North Branch) of the YRE. This study confirms that most species captured in the YRE needs estuarine conditions to complete their growth and development. Hence, the findings in this study are important to understanding and developing suitable conservation plans for the management of fish resources in the YRE.

The accumulation of microplastics in fish from an important fish farm and mariculture area, Haizhou Bay, China

Marine fisheries and aquaculture can match growing demand for marine protein from an increasing population. However, the microplastics (MPs) in marine environments may pose a threat to human health through food chains by seafood consumption. The MPs have been found lodged in the digestive tracts and other tissues of various sea animals, nevertheless, little is known in regard to the accumulation of MPs in fish from major fish farms and mariculture areas, especially in non-digestive tissues of fishes. This study investigated the accumulation of MPs in six major wild fish species (including Thryssa kammalensis, Amblychaeturichthys hexanema, Odontamblyopus rubicundus, Cynoglossus semilaevis, Chaeturichthys stigmatias and Collichthys lucidus), both in digestive and non-digestive tissues, from an important fish farm and mariculture area, Haizhou Bay, China. All fishes had items that were identified as MPs. The highest abundance of MPs was 22.21±1.70items/individual or 11.19±1.28items/g in T. kammalensis, which is filter-feeding and usually inhabits in estuary. The lowest abundance of MPs was observed in C. semilaevis (13.54±2.09items/individual) and C. stigmatias (1.61±0.56items/g). The abundance of MPs exponentially increased with the decrease of MPs size. The MPs were dominated by fiber in shape, black or grey in colour and cellophane in composition. As to different tissues, the total number of MPs on skin (800) or in gills (746) was higher than that in gut (514). In terms of skin, the abundances of MPs in three species of scaleless fish with mucus (A. hexanema, C. stigmatias and O. rubicundus) were generally higher than other three fishes with scales (C. lucidus, C. semilaevis and T. kammalensis), implying the potential high risk of scaleless fish consumption for human health in Haizhou Bay. More in-depth studies need to focus on the scaleless fish through mucus adsorbing enormous MPs.

Keystone species of fish community structure in the Bohai Sea

PDF HTML阅读 XML下载 导出引用 引用提醒 渤海鱼类群落结构关键种 DOI: 作者: 作者单位: 1. 中国水产科学研究院 黄海水产研究所, 农业部海洋渔业可持续发展重点实验室, 山东 青岛 266071;2. 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 266235;3. 中国水产科学研究院 黄海水产研究所, 山东省渔业资源与生态环境重点实验室, 山东 青岛 266071 作者简介: 李忠义(1974-),副研究员,主要从事海洋生态研究.E-mail:lizy@ysfri.ac.cn 通讯作者: 中图分类号: S931 基金项目: 国家973计划项目（2015CB453303）；青岛海洋科学与技术国家实验室鳌山科技创新计划（2015ASKJ02）；农业部公益性行业科研专项（2013030503）；农业部黄渤海渔业资源环境重点野外科学观测试验站和山东省泰山学者工程专项. Keystone species of fish community structure in the Bohai Sea Author: Affiliation: 1. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, China;2. Laboratory for Marine Fisheries and Aquaculture, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China;3. Shangdong Provincinal Key Laboratory for Fishery Resources and Eco-environment, 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:基于2012-2016年每年8月渤海鱼类资源量底拖网调查数据，对鱼类群落进行了CLUSTER聚类分析和MDS标序，根据组间差异种和组内相似种年际贡献率，筛选鱼类群落结构关键种，结果显示：（1）在29.93%~35.69%的相似性水平上，2012-2016年各年度渤海鱼类群落分组情况良好，相应MDS系数都小于0.2。（2）2012-2016年渤海鱼类组间种类组成差异都极显著（）、3个年度共有的种有黄鲫（）；组间差异性贡献率大于10%，且出现率超过50%的鱼类，3个年度共有种仅有鳀，2个年度共有种仅有黄鲫。（3）贡献2012-2016年渤海鱼类群落组内相似性80%累积贡献率，且出现率超过50%的鱼类，2个年度共有的种有鳀、矛尾虾虎鱼（）；组内相似性贡献率大于10%，且出现率超过50%的鱼类，3个年度共有种有鳀，2个年度共有种有矛尾虾虎鱼和矛尾复虾虎鱼。（4）依据2012-2016年渤海鱼类群落结构相似性与差异性中各鱼种累积贡献率和单贡献率的大小和出现频率，推断鳀是渤海鱼类群落结构的首要关键种，其次为黄鲫，然后是矛尾虾虎鱼和矛尾复虾虎鱼。这4种鱼的站位平均资源量对中上层鱼类及底层鱼类站位平均资源量的比例及相关性和回归性，以及年度的优势度指数也证实上述关键种观点。综上所述，渤海鱼类群落结构首要关键种为鳀，其次为黄鲫，渤海鱼类关键种的研究可为渤海捕捞产业的调整和渔业资源的养护提供科学依据。 Abstract:This study applied cluster analysis and MDS sequence analysis to catch-rate data of fish species from bottom-trawl surveys in the Bohai Sea in August of 2012 to 2016. We selected keystone species of the fish community in the Bohai Sea, based on the annual contributions of similar species within clusters and different species between various clusters. (1) When the similarity contribution rate ranged from 29.93% to 35.69%, the fish communities in the Bohai Sea were clustered into 7, 9, 6, 5 and 6 groups for 2012-2016 consecutively, with corresponding MDS coefficients equaling 0.16, 0.14, 0.18, 0.15, and 0.17 respectively. (2) There were significant differences (=0.001) in the species composition of the fish community groups among the five years. The fish species were identified for each year that had cumulatively contributed to about 80% of the difference between community groups and occurred in more than half of the groups. Unfortunately, no common species was identified for all five years. was identified in three years. For species which contributed to more than 10% of the between-groups difference and displayed a more than 50% of occurrence in a year, none occurred in four or five years, only occurred in three years. (3) Similarly, the fish species were identified for each year that had cumulatively contributed to about 80% of the difference within groups and occurred in more than half of the groups. No species were common to three or more years. Three species (i.e. Synechogobius hasta) occurred in two of the five years. For species which had contributed to more than 10% of the within-groups difference and displayed greater than 50% occurrence in a year, no species occurred in more than four years, only Chaeturichthys stigmatias and occurred in two years. (4) Based on the annual cumulative or single similarity or difference contribution rates of every fish species to community groups, we conclude that is the primary keystone species in the fish community structure of the Bohai Sea, the Chaeturichthys stigmatias and . This conclusion is supported by the ratio, correlation, and regression of the average catches per station of these four species to that of all the pelagic or demersal species, and the annual dominance indices of these species. Results of this study provide a scientific basis for the adjustment of the fishing industry and the maintenance of fishery resources in the Bohai Sea. 参考文献 相似文献 引证文献

莱州湾鱼类群落优势种生态位

PDF HTML阅读 XML下载 导出引用 引用提醒 莱州湾鱼类群落优势种生态位 DOI: 10.5846/stxb201408281711 作者: 作者单位: 山东省海洋资源与环境研究院,山东省海洋资源与环境研究院,山东省海洋资源与环境研究院,烟台市水产研究所 作者简介: 通讯作者: 中图分类号: S931.1 基金项目: 山东省渔业资源增殖效果评价（SD-XGPJ-2012-2）；山东省优秀中青年科学家科研奖励基金（BS2012HZ030） Ecological niche of dominant species of fish assemblages in Laizhou Bay, China Author: Affiliation: Shandong Marine Resource and Environment Research Institute,Shandong Provincial Key Laboratory of Restoration for Marine Ecology,Shandong Marine Resource and Environment Research Institute,Shandong Provincial Key Laboratory of Restoration for Marine Ecology,Shandong Marine Resource and Environment Research Institute,Shandong Provincial Key Laboratory of Restoration for Marine Ecology,Yantai Fisheries Research Institute 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:根据2011年5月、8月、10月和12月莱州湾底拖网调查资料，对该海域鱼类群落优势种的生态位进行了研究。结果表明，全年调查共捕获鱼类49种，各季节优势种种类数分别为春季3种，夏季5种，秋季3种，冬季4种。夏、冬季优势种的丛生指数较低，春、秋季较高；冬、春季优势种的平均拥挤度较低，夏、秋季较高。基于欧氏距离的优势种丰度聚类结果同优势度排序结果吻合。主成分分析（PCA）表明，青鳞小沙丁鱼（Sardinella zunasi）和赤鼻棱鳀（Thryssa kammalensis）分别是影响第一轴和第二轴的主要种类。绯鱼衔（Callionymus beniteguri）、鲬（Platycephalus indicus）、髭缟虾虎鱼（Tridentiger barbatus）和短吻红舌鳎（Cynoglossus joyneri）是时空二维生态位宽度最高的种类（>2）。时空生态位显著重叠（>0.6）的种类有7组，其中银姑鱼（Pennahia argentata）和皮氏叫姑鱼（Johnius belengerii）重叠值最高（0.798）。δ13C值变幅（CR）最大的种类为斑鱼祭（Konosirus punctatus），δ15N值变幅（NR）最大的种类为青鳞小沙丁鱼；青鳞小沙丁鱼和鱼祭生态位总面积超过20，皮氏叫姑鱼生态位总面积最小（1.38）且与其他优势种营养生态位重叠较高。等级聚类、排序、PCA和优势种排序结果较一致，而与时空生态位宽度分析结果差异较大，表明莱州湾鱼类群落结构受洄游鱼类的影响较大。时空生态位宽度较高的种类主要为集群特征不明显的周年定居种（绯鱼衔、鲬、短吻红舌鳎等底层鱼类），而季节洄游种（青鳞小沙丁鱼、鱼祭、赤鼻棱鳀等中上层鱼类）因时间生态位宽度较低导致时空生态位宽度较低。时空生态位和营养生态位分析表明，生态位重叠导致的资源利用性竞争并不是导致莱州湾鱼类群落结构现状的决定性因素，而更多可能是人为干扰形成的。 Abstract:Laizhou Bay, an estuary of the Yellow River, is one of the three most important bays of the Bohai Sea, China. It is characterized by a high level of primary productivity and is one of the most important spawning and feeding grounds for most fish species in the Yellow Sea and Bohai Sea. After decades of overfishing, the dominant species of the fish assemblage have been altered. Ecological niche describes how an organism or population responds to the distribution of resources. Therefore, studies on ecological niches are extremely important to clarify the ecological dynamics of different species and the mechanism of interspecific coexistence and competition, as they are a fundamental tool for the conservation and assessment of fish stocks, as well as for the analysis of the ecosystem as a whole. Data were obtained from a bottom trawl survey conducted in Laizhou Bay (119°05'-120°00'E, 37°12'-37°40'N) in 2011. The most dominant species that contributed to 97.2% of biomass and 98.4% of abundance were used for the hierarchical cluster analysis, non-metric multidimensional scaling (NMDS), principal component analysis (PCA), and spatio-temporal niche analysis. Tissue samples were collected from the 12 most dominant species recorded in the trawl-survey catches. δ13C and δ15N stable-isotope analyses were performed to assess the trophic niche. A total of 49 fishes were collected. The assemblage density of dominant species was low in the summer and winter and high in the spring and autumn. The mean crowding of the dominant species was low in the spring and winter, and high in the summer and autumn. The results of the hierarchical cluster analysis based on the Euclidean distance showed a similarity with the results of the ecological dominance analysis. The PCA showed that Sardinella zunasi was one of the species that mostly affected the first axis, and Thryssa kammalensis mostly affected the second axis. Callionymus beniteguri had the highest value of tempo-spatial niche width, followed by Platycephalus indicus, Tridentiger barbatus, and Cynoglossus joyneri. Significant overlap of spatio-temporal niche occurred between the seven groups:Pennahia argentata vs. Setipinna taty (0.798), S. taty vs. Johnius belangerii (0.793), C. joyneri vs. J. belangerii (0.771), Chaeturichthys stigmatias vs. J. belangerii (0.770), Konosirus punctatus vs. Scomberomorus niphonius (0.763), and K. punctatus vs. C. joyneri (0.625). Konosirus punctatus had the highest δ13C range (CR=9.2), and J. belangerii had the highest δ15N range (NR=7.1). The total area (TA) of the trophic niche of S. zunasi and K. punctatus were the highest, both being larger than 20. Johnius belangerii had the lowest TA (1.38); however, it had a significant overlap with other species, such as C. stigmatias, C. joyneri, and P. argentata. The results showed a similar trend with cluster analysis, NMDS, and PCA; however, the trend was different with the tempo-spatial niche analysis. The non-migration species, which lives throughout year in the bay, with lower assemblage densities had a higher value of spatio-temporal niche width. The seasonal migratory species had a lower tempo-spatial niche width because of the low temporal niche width. The high spatio-temporal niche overlap between the most dominant species found in this study also reflected a high degree of homogeneity of fish assemblies in the Laizhou Bay. Competition owing to niche overlap was not the decisive factor that formed the community structure of nekton in the Laizhou Bay. The community structures might be most affected by anthropogenic activities. 参考文献 相似文献 引证文献

Autumn ichthyoplankton assemblage in the Yangtze Estuary shaped by environmental factors.

This study investigated the response of the ichthyoplankton community to environmental changes in the Yangtze Estuary using canonical correspondence analysis. Ichthyoplankton community and environmental data were recorded during the autumns of 1998, 2000, 2002, 2003, 2004, 2007 and 2009. Among the ichthyoplankton, the dominant larval and juvenile families were the Engraulidae, Gobiidae and Salangidae, and the most common eggs were from Trichiurus lepturus. The ichthyoplankton was identified via canonical correspondence analysis to three assemblages: an estuary assemblage dominated by Chaeturichthys stigmatias, a coastal assemblage dominated by Engraulis japonicus and Stolephorus commersonii, and an offshore assemblage dominated by Trichiurus lepturus. Regarding environmental factors in the Yangtze Estuary, suspended matter and surface seawater salinity were the main factors influencing the distributions of the different assemblages, while sediment from the Yangtze River during the rainy season and chlorophyll a were the principle drivers of the annual variances in the distribution of ichthyoplankton assemblages. Our aims in this study were to provide detailed characterizations of the ichthyoplankton assemblage in the autumns of seven years, examine the long-term dynamics of autumn ichthyoplankton assemblages, and evaluate the influence of environmental factors on the spatial distribution and inter-annual variations of ichthyoplankton assemblages associated with the Yangtze Estuary.

The complete mitochondrial genome sequence and gene organization of Amblychaeturichthys hexanema (Gobiidae: Amblychaeturichthys) with phylogenetic consideration

We sequenced and characterized the complete mitochondrial genome of Amblychaeturichthys hexanema and uncovered its molecular phylogenetic relationship. This genome was 18 642 bp in size, and contained 37 classic genes, including 13 protein-coding genes, 22 transfer RNA genes and 2 ribosomal RNA genes. The gene organization and nucleotide composition were the same with those found in most other Gobiidae fishes. In contrast, gene NADH 6 was obviously larger than the same gene identified from other Gobiidae species. Two big repeat regions were detected on both sides of D-loop region. The A + T content (71.2%) of D-loop region was higher than any other region in this genome. Among 37 genes, 28 were encoded by the heavy strand, while nine were encoded by the light strand. The total nucleotide composition of this genome was 28.6% for A, 15.8% for G, 27.2% for C, and 28.3% for T, with a high A + T content of 56.9%. Phylogeny analysis of 22 fish species within Gobioidei showed that A. hexanema and Chaeturichthys stigmatias first formed a single cluster, then they together with other 17 species grouped a big branch. This work should be helpful for the studies on population genetic diversity and molecular evolution of Gobiidae fish species.

Application of otolith shape analysis for stock discrimination and species identification of five goby species (Perciformes: Gobiidae) in the northern Chinese coastal waters

We tested the use of otolith shape analysis to discriminate between species and stocks of five goby species (Ctenotrypauchen chinensis, Odontamblyopus lacepedii, Amblychaeturichthys hexanema, Chaeturichthys stigmatias, and Acanthogobius hasta) found in northern Chinese coastal waters. The five species were well differentiated with high overall classification success using shape indices (83.7%), elliptic Fourier coefficients (98.6%), or the combination of both methods (94.9%). However, shape analysis alone was only moderately successful at discriminating among the four stocks (Liaodong Bay, LD; Bohai Bay, BH; Huanghe (Yellow) River estuary HRE, and Jiaozhou Bay, JZ stocks) of A. hasta (50%-54%) and C. stigmatias (65.7%-75.8%). For these two species, shape analysis was moderately successful at discriminating the HRE or JZ stocks from other stocks, but failed to effectively identify the LD and BH stocks. A large number of otoliths were misclassified between the HRE and JZ stocks, which are geographically well separated. The classification success for stock discrimination was higher using elliptic Fourier coefficients alone (70.2%) or in combination with shape indices (75.8%) than using only shape indices (65.7%) in C. stigmatias whereas there was little difference among the three methods for A. hasta. Our results supported the common belief that otolith shape analysis is generally more effective for interspecific identification than intraspecific discrimination. Moreover, compared with shape indices analysis, Fourier analysis improves classification success during inter- and intra-species discrimination by otolith shape analysis, although this did not necessarily always occur in all fish species.

Evaluation and Content of Various Heavy Metals Found in the Fish (&lt;i&gt;Chaeturichthys Stigmatias&lt;/i&gt; Richardson) Collected from the Oil Spill Area of Bohai Bay (China) during the Summer

The heavy metal content in fish (Chaeturichthys stigmatias Richardson) tissue in the oil spill area of Bohai Bay had been evaluated though the determination results, the distribution and variation difference of the heavy metal content in fish tissue had been discussed The fish of each sample stations were not polluted by heavy metals.

莱州湾及黄河口水域鱼类群落结构的季节变化

PDF HTML阅读 XML下载 导出引用 引用提醒 莱州湾及黄河口水域鱼类群落结构的季节变化 DOI: 10.5846/stxb201303060354 作者: 作者单位: 上海海洋大学海洋科学学院 上海;山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛;山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛,山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛;山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛,山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛,山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛,山东省渔业资源与生态环境重点实验室 中国水产科学研究院黄海水产研究所 青岛 作者简介: 通讯作者: 中图分类号: 基金项目: 国家重点基础研究发展计划资助项目（2011CB409805，2010CB951204）；山东省优秀中青年科学家科研奖励基金资助项目（BS2012HZ030）；山东省泰山学者专项基金资助项目 Seasonal variations in fish community structure in the Laizhou Bay and the Yellow River Estuary Author: Affiliation: College of Marine Sciences, Shanghai Ocean University, Shanghai;Shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment, Yellow Sea Fisheries Research Institute, CAFS, Qingdao,,,,Shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment, Yellow Sea Fisheries Research Institute, CAFS, Qingdao 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:根据2011年5月-2012年4月对莱州湾及黄河口水域9个航次的渔业底拖网调查数据，对该水域鱼类群落结构特征及其季节变化进行了初步研究。结果表明：莱州湾及黄河口水域共捕获鱼类62种，隶属于11目、34科、53属，主要由暖水种和暖温种组成，其中鲈形目种类最多（37种），其次是鲉形目（7种）和鲽形目（6种）。春季优势种包括矛尾鰕虎鱼（Chaeturichthys stigmatias）、鲱衔（Callionymus beniteguri）、短吻红舌鳎（Cynoglossus joyneri）、矛尾复鰕虎鱼（Synechogobius hasta）和方氏云鳚（Enedrias fangi），其渔获量占总渔获量的70.8%；夏季包括矛尾鰕虎鱼、斑鰶（Konosirus punctatus）、鲱衔和短吻红舌鳎，占总渔获量的68.1%；秋季包括矛尾鰕虎鱼、赤鼻棱鳀（Thrissa kammalensis）、鳀（Engraulis japonicus）、青鳞小沙丁鱼（Sardinella zunasi）、斑鰶、小黄鱼（Larimichthys polyactis）和矛尾复鰕虎鱼，占总渔获量的87.1%。平均单位时间渔获量存在显著季节变化，以秋季最高（22.63kg/h），其次是夏季（16.75kg/h），春季最低（1.29kg/h）。春季（5月）平均单位时间渔获量为0.69kg/h，为1959年、2003年、2006年和2008年春季（5月）的0.3%、0.3%、1.7%和541.2%，鱼类资源量虽有所回升，但总体呈大幅下降的趋势。鱼类种类数、丰富度指数和多样性指数夏季较高，秋季次之，春季最低，但是以渔获尾数计算的均匀度指数，夏季最大，春季最小，以渔获量计算的均匀度指数则相反，且丰富度指数和多样性指数与表层温度呈极显著相关（P<0.01），丰富度指数和均匀度指数与表层盐度呈极显著相关（P<0.01）。 Abstract:Seasonal variations in fish community structure characteristics in the Laizhou Bay and the Yellow River Estuary were analyzed by combining data collected from bottom trawl surveys on 9 different voyages in May-November, 2011 and March-April, 2012 with existing historical data. A total 62 fish species were caught, belonging to 11 orders and 34 families, which mainly comprised warm water and warm temperate species. The Perciformes were the most abundant (37 species), followed by the Scorpaeniformes (7 species) and Pleuronectiformes (6 species). In terms of total catch per haul (kg) and the number per haul, warm temperate species were the most abundant followed by warm water species and cold temperate species. The warm temperate species catches were highest in spring in the coastal region, whereas warm water and warm temperate species catches were higher in summer and autumn, which were mostly distributed in the northeast Laizhou Bay deep-water area in autumn. Warm temperate species were widely distributed in summer and warm water species were mostly distributed in the coastal region of southern Laizhou Bay. The dominant species in spring were mainly non-commercial demersal fish; Chaeturichthys stigmatias, Callionymus beniteguri, Synechogobius hasta, and Enedrias fangi accounted for 66.4% of the total catch. The dominant species in summer were also mainly non-commercial demersal fish species; C. stigmatias and C. beniteguri accounted for 44.6% of the total catch. While in autumn, the dominant species were mainly commercial pelagic fish; Engraulis japonicus, Sardinella zunasi, and Konosirus punctatus accounted for 40.8% of the total catch. According to the dominance curve, the dominant species were most prominent in summer, autumn, and spring in that order. The catch per haul exhibited significant seasonal variation, being highest in autumn (22.66 kg/h) followed by summer (16.75kg/ h) then spring (1.29 kg/ h). The average catch per haul of the dominant species in spring (May) was 0.69 kg/h, which is 0.3%, 0.3%, 1.7%, and 541.2% of the surveys in the spring (May) of 1959, 2003, and 2008, respectively. Despite the small increase in fish resources, the overall trend shows a substantial decrease. Species composition exhibited higher similarities in adjacent months, i.e. each month of the same season and the months of summer and autumn. The number of fish species and abundance and diversity indices were all highest in summer, followed by autumn and then spring. However, the evenness index calculated by number was highest in summer and lowest in spring, this trend was inversed when the index was calculated by weight. The species abundance and diversity indices were significantly correlated with sea surface temperature (P<0.01). The species abundance index and evenness index were significantly correlated with sea surface salinity (P<0.01). 参考文献 相似文献 引证文献

Unusual features of control region and a novel NADH 6 genes in mitochondrial genome of the finespot goby, Chaeturichthys stigmatias (Perciformes, Gobiidae)

In this article, we determined the complete mitogenome of finespot goby Chaeturichthys stigmatias with emphasis on the arranged gene order and gene feature with published Gobiidae species. The C. stigmatias mtDNA was 18,562 bp in length (56.94% AT), and comprised 37 genes (13 protein genes, 2 rRNAs and 22 tRNAs) that was typical for mitochondrial genome of Gobiidae species. Unusually, the NADH 6 gene was very large in length compared with other Gobiidae species. Mitogenome of C. stigmatias had a long putative control region with high AT content (71.28%). Within this sequence, we determined repeat regions, the termination-associated sequence and the conserved sequence block for this region. The origin of L-strand replication in C. stigmatias was located in a cluster of five tRNA genes (WANCY). The conserved motif (5′-GCCGG-3′) was also determined at the base of the stem in the tRNA-Cys gene. This study will provide a better understanding of Gobiidae mitogenomes and offer useful information for future studies concerning Gobiidae mitogenome evolution.

Species composition and community diversity of nekton in Laizhou Bay, China

Based on trawls conducted in Laizhou Bay, China (119°05′–120°00′ E, 37°12′–37°40′ N), in 2010 and 2011, an analysis was made of changes in species composition, dominant species and community diversity of nekton. A total of 85 species were identified, which included 55 fish, 25 crustaceans and 5 cephalopod species. The most species-rich orders were Perciformes (28 species) and Decapoda (24 species). There was obvious seasonal variation in nekton number, mostly influenced by the number of fishes. Sardinella zunasi, Konosirus punctatus and Thryssa kammalensis were the main pelagic fishes in Laizhou Bay, Chaeturichthys stigmatias, Acanthogobius ommaturus and Cynoglossus joyneri were the main bottom fishes, Orgtosaquilla oratoria, Charybdis japonica and Crangon hakodatei were the main crustaceans, while squid (Loliolus sp.) represented the main cephalopods. Loliolus sp., Chaeturichthys stigmatias and Konosirus punctatus were the dominant species in both 2010 and 2011 and the Shannon-Wiener diversity index was highest in summer and lowest in winter. The Shannon-Wiener index was also higher in the north-east area and lower in the south-west. Since the late 538 生 物 多 样 性 Biodiversity Science 第 21卷 1950s, nekton number, especially of fish, has significantly declined due to human activities and climate change impacts. This is particularly true for cartilaginous fish, estuarine species, river-migratory species, large-scale economic fish, flatfish and takifugu. In parallel, dominant species, such as Trichiurus lepturus, Setipinna taty, Engraulis japonicus, Thryssa kammalensis have been replaced by smaller nekton.

Spatial variation in fish community of Yangtze River estuary in spring

For studing the effect and mechanism of variability of habitat factors on important biological resources in the Yangtze River estuary(YRE),we evaluated the relationship between fish community structure and envi-ronmental factors in the YRE.We collected fish by bottom trawling and obtained environmental data from 30 sta-tions in the YRE in May and June 2010.In addition,we used historical data to analyze the effect of large hydraulic projects on fish community dynamics in the YRE.We collected a total of 40 fish species belonging to 23 families and 12 formers.The Engraulidae and Gobiidae families were the most abundant(5 species each),followed by Sciaenidae(4 species),and Cynoglossidae(3 species).The trawl catches were dominated by young-of-year juve-niles.The most abundant species(94.11% of the total catch) by life history type were Chaeturichthys stigmatias(resident),Collichthys lucidus(marine migrant),Collia mystus(semi-anadromous),and Collia nasus(anadro-mous).Cluster and non-metric multidimension scaling analysis revealed significant spatial variation in the fish community.Of the nine environmental variables we measured,water depth,bottom salinity,and surface salinity were the most significant factors influencing fish species richness and density in the inner zone.Conversely,the fish community in the outer zone was primarily influenced by the bottom pH,surface salinity,and bottom tem-perature.The number of fish species declined compared to historical catches in May(69 species,1.72×104 ind/km2)and June(62 species,2.29×104 ind/km2) in 1985,though fish density(5.2×104 ind/km2) increased.Our results indicate the YRE has still been the spawming and nursery ground for commercial species,but fish commu-nity structure has varied.

中街山列岛海洋保护区鱼类物种多样性

The Zhongjieshan Islands Marine Protected Area( MPA) is located in the central area of the Zhoushan fishing ground. It lies to the east of Zhoushan Islands District in Zhejiang Province and is historically known as the "fish warehouse"of the East China Sea. Fish community taxonomy and eco-group data from eight bottom trawl surveys in Zhongjieshan Islands MPA,carried out from 2010 to 2012,were used to examine species composition in detail. Indices such as Margalef' s species richness index,Shannon-Wiener' s species diversity index,Pielou' s species evenness index,resource density index as well as Pinkas' s IRI were used to analyze the status of fish diversity in the protected area. A total of 55 fish species belonging to 2 classes,12 orders,32 families and 44 genera were collected during the survey. 26 species from the order Perciformes( accounting 47. 3% of the total species) and 41 reef species( 74. 5% of the total species) were captured. There were 30 warm temperate species,24 warm water species and 1 cold temperate species,and nearly 70% of total rare species were warm temperate species. There were 27 local species,24 offshore migrating species and 24 seasonal species. Forty percent of the fish caught were demersal,36. 4% were meso-demersal and 23. 6% were pelagic. The dominant species in each habitat layer was examined,Chaeturichthys stigmatias was the most abundant demersal fish,Harpodon nehereus was the most dominant meso-demersal fish. Fish in the family Engraulidae dominated the surface waters.The mean biomass index of the study area was highest in summer( 1043. 7 kg / km2) and lowest in spring. The abundance density index was highest in spring( 122×103ind / km2),but lowest in winter. Both the biomass index and the abundance density index in the highest season were significantly different from that in the lowest season( P 0. 05). The average Margalef's species richness index was highest in winter,but lowest in autumn,while the highest and lowest of both Shannon-Wiener's species diversity index and Pielou's species evenness index were in summer and autumn,respectively.Hierarchical clustering and further non-metric multidimensional scaling( NMDS) analysis indicated extremely significant seasonal changes in the fish community structure( P0. 01). The structure of fish resources in Zhongjieshan Islands MPA was significantly influenced by offshore seasonal migrating species,and the seasonal dynamic of fish distributions showed alternate migratory rhythm. Although the diversity of the protected area showed a downward trend,and the dominance of traditional economic species gradually declined or marginalized,the unique reef habitat still played an important role in both maintaining the local species and offering more bio-available habitat. With the development of marine ranching and implementation of a range of resource protection and restoration measures,the family Sciaenidae became a dominant group,and a large number of small forage fish appeared in the protected area.

English

&nbsp; To study the genetic and phylogenetic relationship of gobioid fishes in China, the representatives of 10 gobioid fishes from 2 subfamilies in China were examined by amplified fragment length polymorphism (AFLP) analysis. We established 220 AFLP bands for 45 individuals from the 10 species, and the percentage of polymorphic bands was 100%. The percentage of polymorphic loci within species ranged from 3.61 to 58.56%.&nbsp;Chaeturichthys stigmatias&nbsp;showed the greatest percentage of polymorphic loci (58.56%), the highest Nei&rsquo;s genetic diversity (0.2421 &plusmn; 0.2190) and Shannon&rsquo;s information index (0.3506 &plusmn; 0.3092), while&nbsp;Pterogobius zacalles&nbsp;showed the lowest percentage polymorphic loci (3.61%), the lowest Nei&rsquo;s genetic diversity (0.0150 &plusmn; 0.0778) and lowest Shannon&rsquo;s information index (0.0219 &plusmn; 0.1136). The topology of UPGMA tree showed that the individuals from the same species clustered together and the 10 species formed two major clades. One clade consisted&nbsp;Cryptocentrus filifer,&nbsp;P.&nbsp;zacalles,&nbsp;Tridentiger trigonocephalus,Chaeturichthys hexanema,&nbsp;C.&nbsp;stigmatias,&nbsp;Acanthogobius flavimanus&nbsp;andSynechogobius ommaturus,&nbsp;and the other clade consisted&nbsp;Odontamblyopus rubicundus,&nbsp;Trypauchen vagina&nbsp;and&nbsp;Ctenotrypauchen microcephalus. The results agreed with the traditional taxonomy of the morphological characters. AFLP fingerprints were successfully used to study the phylogenetic relationship of the gobioid fishes and it identified species origins of morphologically similar taxa. &nbsp; Key words:&nbsp;Phylogenetic, amplified fragment length polymorphism (AFLP), gobiidae, Amblyopinae, gobiinae.

완도 해역의 새우조망어업에서 발생한 부수어획물의 계절적 변동

We examined shrimp and bycatch species composition in the shrimp beam trawl fishery off Wan-do, Korea(in the major or fishing ground)from December 2004 to November 2005. We observed a total of 103, 072 individuals in 96 taxa. By densities of individuals, 96.97% were shrimps, 1.20% decapods, 1.10% fish, 0.30% cephalopods and 0.43% other species. By catch weight, 57.29% were shrimps, 26.33% fish, 6.82% decapods, 4.64% cephalopods and 4.92% other species. In spring, the dominant bycatch species by biomass were Okamejei kenojei, Lophiomus setigerus, and Charybdis bimaculata. In summer, the dominant species were Charybdis bimaculata, Muraenesox cinereus, and Paralichlhys olivaceus. In autumn, dominants were Okamejei kenojei, Conger myriasler, and Sefipinna tenuifilis, and in winter they were Okamjei kenojei, Chaeturichthys stigmatias, and Sillago japonica. Bycatch species composition and individual species abundances differed significantly among seasons, probably indicating that variations were related to the life history characteristics of bycatch species. The diversity index was highest in October (2.797) and lowest in July (1.012). The July dominance index (0.569) was much higher than in other months; evenness was highest in September (0.856) and lowest in July (0.374). During the study period, the bycatch-to-shrimp ratio of this fishery varied from 0.063 in February 2005 to 11.031 in May 2005, with a mean of 3.363 These temporal variations may be linked 10 variations in reproductive behaviors and migration patterns of the marine animals sampled.

Ecological conversion efficiency and its influencers in twelve species of fish in the Yellow Sea Ecosystem

The ecological conversion efficiencies in twelve species of fish in the Yellow Sea Ecosystem, i.e., anchovy ( Engraulis japonicus), rednose anchovy ( Thrissa kammalensis), chub mackerel ( Scomber japonicus), halfbeak ( Hyporhamphus sajori), gizzard shad ( Konosirus punctatus), sand lance ( Ammodytes personatus), red seabream ( Pagrus major), black porgy ( Acanthopagrus schlegeli), black rockfish ( Sebastes schlegeli), finespot goby ( Chaeturichthys stigmatias), tiger puffer ( Takifugu rubripes), and fat greenling ( Hexagrammos otakii), were estimated through experiments conducted either in situ or in a laboratory. The ecological conversion efficiencies were significantly different among these species. As indicated, the food conversion efficiencies and the energy conversion efficiencies varied from 12.9% to 42.1% and from 12.7% to 43.0%, respectively. Water temperature and ration level are the main factors influencing the ecological conversion efficiencies of marine fish. The higher conversion efficiency of a given species in a natural ecosystem is acquired only under the moderate environment conditions. A negative relationship between ecological conversion efficiency and trophic level among ten species was observed. Such a relationship indicates that the ecological efficiency in the upper trophic levels would increase after fishing down marine food web in the Yellow Sea ecosystem.