Length-weight Relationship Parameters Research Articles

Size distribution and length-weight relationships in Pholis fangi in Haizhou Bay

PDF HTML阅读 XML下载 导出引用 引用提醒 海州湾方氏云鳚体长与体重分布特征及其关系 DOI: 作者: 作者单位: 1. 中国海洋大学 水产学院, 山东 青岛 266003;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 266003 作者简介: 栾静(1993-),女,硕士研究生,主要从事渔业资源的研究.E-mail:lj_199308@126.com 通讯作者: 中图分类号: S93 基金项目: 中央高校基本科研业务费专项资金资助（201612002，201512002）. Size distribution and length-weight relationships in Pholis fangi in Haizhou Bay Author: Affiliation: 1. Key Laboratory of East China Sea and Oceanic Fishery Resources Exploitation and Utilization, Ministry of Agriculture;East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 20009, China;2. College of Fisheries, Ocean University of China, Qingdao 266003, 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:体长、体重是鱼类种群的基本生物学特征，能够反映鱼类个体生理状态以及所处环境条件的变化，但在实际研究中其时空变化往往被忽略。本文根据2011-2016年春、秋季海州湾8个航次的渔业资源底拖网调查数据，研究了方氏云鳚（）的体长组成、体重组成，体长-体重关系和肥满度特征，并分析了上述指标的时空异质性。结果表明，海州湾方氏云鳚的群体有多个年龄组，体长、体重和体长-体重关系参数及肥满度在时空上均有较大波动，且在年间差异显著。秋季各航次平均体长、体重呈现逐年增大趋势；肥满度的季节差异要大于年间差异，春季肥满度小于秋季；体长和肥满度在海州湾分布均是西南部大于东北部，但秋季肥满度分布则与此相反。调查的方氏云鳚群体基本符合正异速生长类型。体长体重特征的时空异质性可能与气候、摄食强度、性成熟比例与捕捞压力等有关，并在一定程度上反映了渔业生态系统和栖息地特征。相关研究应充分考虑体长、体重关系参数的时空变化，以为渔业资源评估提供精确参数。 Abstract:Body size is a basic biological characteristic in fish populations and can reflect individual physiology as well as changing environment conditions. Slight variabilities in some biological parameters may result in complex ecological effects, and affect food web link intensity in trophic cascades. However, the spatial and temporal heterogeneity of size composition within populations have often been ignored in many studies of fish biology. We use Fang's gunnel () in Haizhou Bay as an example for studying the variability of body size on an annual scale. is a low trophic fish and plays an important role in the food web and ecosystem of the Yellow Sea, with increasing dominance in Haizhou Bay. We collected annual bottom trawl surveys in Haizhou Bay in the spring and fall from 2011 to 2016. We used a range of statistical methods, included variable coefficient, covariance analysis, two-sample -test, and Pearson correlation analysis to study the population size composition, length-weight relationship, and relative fatness of in this area. We analyzed the annual and seasonal variability as well as the spatial distribution of body length and relative body mass. The results showed that had multiple age structure in Haizhou Bay. Their length frequency distributions were multi-modal and skewed, with the majority of captured individuals aged 2-3 years. Statistical analysis indicated that there were remarkable temporal and spatial variations in the average size and the parameters of body length-weight relationship of <0.05). The average body length and relative fatness tended to be higher during autumn surveys than spring surveys. Variation in relative fatness was greater between seasons than among years. In spring, the spatial distribution of body length and relative fatness was larger in the southwest area than the northeast area of the bay. A -test on the body length-weight relationship showed that the allometric growth patterns of were generally positive. Correlation analyses between benthic water temperature and the length-weight relationship showed that temperature had a substantial influence on the relative fatness, body length-weight relationship, and mean body length. The spatiotemporal variability of fish size and other parameters may be attributed to their feeding intensity, maturation, fishing pressure, and environmental and habit variation, and is also likely to reflect changes in the fishery ecosystem. We suggest that the spatiotemporal variability of population size composition should be fully considered in fisheries resource management, as these basic parameters can contribute significantly to fishery ecosystem modelling and management strategy evaluation. 参考文献 相似文献 引证文献

Length-weight Relationships and State of Well-being of Parachanna obscura Gunther1861, in Eleyele Reservoir, Southwestern Nigeria

The knowledge of length-weight relationship parameters has numerous practical applications in fishery research and management. However, there is currently dearth of information on the growth pattern and state of well-being of Parachanna obscura in Eleyele Reservoir. This study therefore investigates the allometry and condition factor of P. obscura inhabiting the Eleyele Reservoir, Southwestern Nigeria. 688 specimens of P. obscura were collected from artisanal fishers’ at their landing sites on a bimonthly basis for 24 months. Standard Length (SL, cm), and Body Weight (BW, g) were measured. Length-Weight Relationships (b>3 or <3-allometric; b=3-isometric), and condition factor (K) were calculated using standard formula. Data were analysed using descriptive statistics and ANOVA at α0.05. The SL and BW of P. obscura ranged from 10.6 to 39.2 and 15.3 to 830.5 respectively. The LWR were 3.04 (male) and 2.99 (female) indicating positive allometric pattern of growth in male and negative allometric growth in female. The growth coefficient b ranged between 2.877 in July and 3.348 in May, with very significant coefficient of determination r2 for all the months. Variations recorded in the b value of different size groups showed positive allometric growth in 10.1 cm -15.0 cm, 15.1 cm -20.0 cm and 20.1 cm -25.0 cm, but negative allometric growth in 25.1 cm -30.0 cm and 30.1 cm -40.0 cm. The maximum (1.54 ± 0.12) K was noticed during March 2016 and the minimum (1.30 ± 0.7) K in September 2015. Significant variation occurred in K with size groups. The mean K value in females (1.43 ± 0.21 and 1.44 ± 0.20) was higher than males (1.40 ± 0.18 and 1.42 ± 0.17) for 2014-2015 and 2015-2016, respectively. The results indicated that P. obscura were thriving very well in Eleyele Reservoir.

Length-weight relationships of four indigenous freshwater fish species from Khalsi wetland in lower Ganga basin, West Bengal, India

The length-weight relationships of four indigenous freshwater fishes Parambassis lala (Hamilton, 1822), Trichogaster lalius (Hamilton, 1822), Puntius terio (Hamilton, 1822), and Pethia phutunio (Hamilton, 1822) were determined. Fish samples were collected during December 2013 to May 2015 from Khalsi, a floodplain wetland along the tributary of the River Ganges in West Bengal state, India using different types of gear (castnets, gillnets and drag nets, stretched mesh sizes of 15–20 mm, 20–30 mm and 5–10 mm, respectively). This is the first report on the length–weight relationship parameters of these four species.

Length-weight relationships of fish species in Kordan River (Namak Lake basin), Iran

Length-weight relationships were estimated for three little-known species in Kordan River, in the Namak Lake Basin, Iran. For all species the estimated length-weight relationship parameters fell within normal distributions and predicted ranges.

Length-weight relationships of 58 fish species in French Guiana streams

Length-weight relationship parameters of the form W = aLb are presented for 58 fish species representing 36 genus and 19 families captured in streams of French Guiana. LWRs for 53 of the species are estimated for the first time.

LENGTH�WEIGHT AND LENGTH�LENGTH RELATIONSHIPS OF SIX PONYFISH SPECIES FROM THE PERSIAN GULF

Length–weight relationship (LWR) and length–length relationship (LLR) were estimated for six species of ponyfishes captured in the Persian Gulf, Iran. The LWRs indicated isometric growth in ornate ponyfish (Equulites lineolatus), common ponyfish (Leiognathus equulus) and deep pugnose ponyfish (Secutor ruconius) species, positive allometric growth in striped ponyfish (Aurigequula fasciata) and negative allometric growth in decorated ponyfish (Nuchequula gerreoides) and orangefin ponyfish (Photopectoralis bindus). LWR and LLR parameters for one of the species (E. lineolatus) are given for the first time. The relationships between TL, FL and SL were all linear and highly correlated (for all cases: r2 > 0.97)

Length-weight relationships of dominant fish species from Caxiuanã National Forest, Eastern Amazon, Brazil

Summary The present work presents parameters of the length–weight relationships (LWR) for 12 species of freshwater fish from rivers within the Caxiuana National Forest, Eastern Amazon. Data coverage include the main taxonomic groups in the sampling area: Characiformes: Acestrorhynchidae, Anostomidae, Curimaridae, Erythrinidae, Hemiodontidae; Siluriformes: Auchenipteridae; Perciformes: Sciaenidae. LWR parameters are estimated for the first time for five species: Leporinus affinis, Bryconops melanurus, Pygopristis denticulata, Serrasalmus gouldingi and Triportheus albus. Relative growth patterns were evenly distributed among species, one-third showing negative allometry (b 3; n = 4).

The length-weight relationship of freshwater blenny, Salaria fluviatilis (Asso, 1801) in 7 drainage basin of Turkey.

The present work aimed at determining the length-weight relationship of freshwater blenny (Salaria fluviatilis) in the 7 drainage basins of Turkey. For this purpose, total of 652 freshwater blenny specimens were examined belonging to the Marmara, Küçük Menderes, Western Black Sea, Antalya, Eastern Mediterranean, Seyhan and Ceyhan basins. Total lengths ranged from 2.0 to 12.9 cm and total weights ranged from 0.10 to 33.82 g. Length-weight relationship parameters were computed as a=0.0135, b=3.004, r2=0986 for all individuals of the species in the freshwater of Turkey. In addition, growth type were determined isometric in 5 basin, positive allometric in 1 basin and negative allometric in 1 basin.

A Bayesian approach for estimating length-weight relationships in fishes

A Bayesian hierarchical approach is presented for the estimation of length-weight relationships (LWR) in fishes. In particular, estimates are provided for the LWR parameters a and b in general as well as by body shape. These priors and existing LWR studies were used to derive species-specific LWR parameters. In the cases of data-poor species, the analysis includes LWR studies of closely related species with the same body shape. This approach yielded LWR parameter estimates with measures of uncertainty for practically all known 32 000 species of fishes. Provided is a 3 large LWR data set extracted from www.fishbase.org, the source code of the respective analyses, and ready-to-use tools for practitioners. This is presented as an example of a self-learning online database where the addition of new studies improves the species-specific parameter estimates, and where these parameter estimates inform the analysis of new data.

The length-weight relationship of freshwater blenny, Salaria fluviatilis (Asso, 1801) in 7 drainage basin of Turkey.

The present work aimed at determining the length-weight relationship of freshwater blenny (Salaria fluviatilis) in the 7 drainage basins of Turkey. For this purpose, total of 652 freshwater blenny specimens were examined belonging to the Marmara, Kucuk Menderes, Western Black Sea, Antalya, Eastern Mediterranean, Seyhan and Ceyhan basins. Total lengths ranged from 2.0 to 12.9 cm and total weights ranged from 0.10 to 33.82 g. Length-weight relationship parameters were computed as a=0.0135, b=3.004, r2=0986 for all individuals of the species in the freshwater of Turkey. In addition, growth type were determined isometric in 5 basin, positive allometric in 1 basin and negative allometric in 1 basin.

Length-weight relationships for 24 selected fish species from a non-tidal lagoon of the southern Adriatic Sea (Italy)

1 - Length-weight relationships (LWR) were estimated for 24 selected fish species in a small non-tidal lagoon located on the Italian coast of the southern Adriatic Sea (central Mediterranean Sea) 2 - Samples were collected bi-weekly from June 2007 to May 2008 with fyke nets and LWR parameters were obtained by ordinary least square regression over log10-log10 transformed data 3 - In terms of taxonomic richness, the assemblage was dominated by the family Sparidae (8 species), followed by Mugilidae (4), Gobiidae (3) and Mullidae (2). Seven families were represented by only one species 4 - The values of the exponent b ranged from 2.891 for Sciaena umbra to 3.313 for Diplodus sargus sargus, with a mean value of 3.132. All the relationships were highly significant. Length-length equations for converting between length measurements (standard length (SL) to total length (TL))were also computed 5 - To the authors’ best knowledge, this study reports the first reference for LWR of two gobid species in the Adriatic Sea.

Length-weight relationships, condition factors and relative weight of five fish species of Bushehr waters, Northern Persian Gulf

The aim of this study was to record the length-weight relationship parameters and condition factors for some commercially important fish of Bushehr coastal waters of Persian Gulf. The length-weight relationships were calculated for five species caught during fishing surveys using different types of fishing gears (trawls, pots and gill net with different mesh size) during April 2008 to December 2010. The b value ranged between 2.733 for Argyrops spinifer and 3.03 for Epinephelus coioides . The coefficient of determination (r2) was very significant for all the species. Relative weight had significant differences (Kruskal-Wallis test, P<0.001) with best performance by E. coioides. This results show that this range size of specimens in these populations apparently do not reach and surpass 100% of mean weight. In this study, length-weight relationships and condition factors are reported for the first time for A. spinifer, Pomadasys kaakan and Lutjanus malabaricus from the Persian Gulf and for Lethrinus nebulosus and Lutjanus malabaricus ruber which has not been previously recorded in the Iranian waters. Key words : Length-weight relationships, condition factor, relative weight, Persian Gulf.

Condition, length–weight and length–length relationships of the silver hatchet Chela, Chela cachius (Hamilton, 1822) in the Old Brahmaputra River of Bangladesh

The silver hatchet chela, Chela cachius (Hamilton, 1822), is a cyprinid freshwater species, commercially important for both subsistence and artisanal fisheries in Bangladesh. This study describes the length–weight relationship (LWR), length–length relationship (LLR) and the condition of this minnow species from the Old Brahmaputra River in Bangladesh. In this study, 12 monthly samples totalling 2400 specimens (1172 male; 1228 female) collected from November 2004 to October 2005 were used to conduct this study. For each individual, the total length (TL), fork length (FL) and standard length (SL) as well as body weight (BW) were measured. The overall sex ratio showed no significant difference from the expected value of 1:1 and the analysis of covariance (ANCOVA) revealed no significant difference between LWRs of male and female for the pooled data over a year. Parameters of LWRs of combined gender varied monthly with high coefficients of determination (r 2 > 0.751; p < 0.001). All the LLRs (SL vs. FL, FL vs. TL and SL vs. TL) exhibited strong correlations (r 2 > 0.886; p < 0.001) and ANCOVA analyses further indicated that LLRs did not differ between males and females. The relative-condition factors with regard to both months and SLs varied in all gender groups. Females maintained similar mean condition throughout life and showed more plumpness than both males and combined genders in all months. Finally, the results should be useful for the sustainable management of this minnow species in Old Brahmaputra River and adjacent water-bodies.

Length-weight relationships and seasonality in reproduction of six commercially utilized fish species in the coastal lagoon of Tres Palos (Mexico)

Summary The length–weight relationship parameters and seasonal reproductive cycle are recorded for six commercially important fish species caught in the coastal lagoon of Tres Palos. The length–weight information is new to the literature for three of these species (spot cichlid, spotted sleeper, Pacific fat sleeper) and is within the expected range for the other three (widehead sea catfish, three spot cichlid, white mullet). Differences between sexes are statistically significant for four species and deviations from isometric growth are indicated in three species. The reproductive period for the Pacific fat sleeper differed substantially from the period reported for this species in Ecuadorian waters.

The length-weight relationship parameters of demersal fish species off the western coast of Baja California Sur, Mexico

The length–weight relationship parameters were recorded for 24 families, 34 genera and 46 species of 10 963 specimens sampled off the western coast of Baja California Sur, Mexico, many for the first time. New maximum length records were obtained for seven of these species. The b values ranged from 2.62 for Sebastes rubrivinctus to 3.80 for Peprilus simillimus.

Length-weight relationships for six freshwater fish species in Iran

The aim of this study is to report the length-weight relationship parameters (a and b) for some economically important fish species from Iranian freshwaters. The length-weight relationships (LWR) are calculated for six freshwater fish species collected during 2006 and 2007 in Iran. The values of the exponent b in the LWR (W=aLb) vary between 2.985 and 3.543. The LWR with high correlation coefficient (r2) is significant for all the species. These parameters are of great importance to evaluate the relative condition of populations, biology, species management and their fisheries and stock assessment. The application of the length-weight relationships presented here should be limited to the observed length ranges.

Length-Weight Relationships of Fishes from Gökova Bay, Turkey (Aegean Sea)

Length-weight relationships (LWRs) are presented for 17 fish species caught from Gökova Bay (southeastern Aegean Sea) during the 2006 fishing season. Fish samples were collected from small-scale trammel nets and longline fisheries. The values of b ranged from 2.086 (±0.152) for Sphyraena sphyraena to 3.499 (±0.058) for Scomber japonicus. The median value of b was 3.055 (±0.081). The r^2 values ranged from 0.712 for Sphyraena chrysotaenia to 0.996 for Scomber japonicus and all relationships were highly significant (P < 0.001). Estimated LWR parameters of 4 species, Dicentrarchus labrax, Seriola dumerili, Siganus luridus and Sphyraena sphyraena, for Turkish waters are presented for the first time.

LENGTH-WEIGHT RELATIONSHIP OF MARINE COMMERCIAL FISH SPECIES IN RIO DE JANEIRO STATE, BRAZIL

Length-weight relationship parameters of thirteen species of demersal and pelagic fishes that are of economic and ecological relevance in the commercial fisheries of Rio de Janeiro State, southeastern of Brazil, are presented. These relationships indicate a positive allometry tendency for the regression slope, b in the sampled fish community.

Length-weight parameters and condition factor of Bonga, Ethmalosa fimbriata in the Cross River Estuary, Nigeria: importance of large volume of data

No abstract available Length-weight parameters for bonga, Ethmalosa fimbriata in Cross River Estuary were estimated. Weight growth in Ethmalosa fimbriata was found to be isometric, with exponent b= 3.0 and a = 0.00967. This indicates that growth is proportional in all directions. The value of (a) was the same as that of the condition factor, providing a biological interpretation to the parameters of the length-weight relationship. The importance of using large volume of data in the estimation of the parameters of length-weight relationship in any fish species as well as the implication of these findings with regards to the possibility of applying conventional fish population dynamics models to the analysis of bonga population are demonstrated. Key Words: Length-weight parameters; condition factor; bonga; Cross River Estuary; large data Global Jnl Pure and Applied Sciences Vol.10(3) 2004: 379-383

Age and Growth of Flathead Catfish, Pylodictus olivaris Rafinesque, in the Altamaha River System, Georgia

ABSTRACT Flathead catfish were introduced to the Altamaha River system, Georgia in the 1970's. We determined the length-weight relationship, Von Bertalanffy growth parameters, and back calculated lengths by examining the sagittal otoliths of 331 individuals captured from this population. We found that there were no sex related differences in length weight relationship or Von Bertalanffy growth parameters. Flathead catfish in the Altamaha River system grow at about the same rate as individuals in other introduced populations.