Length–weight relations for 29 demersal fishes caught by small otter trawl on the south-eastern coast of Korea

Abstract

Park J.M., Huh S.H. 2015. Length-weight relations for 29 demersal fi shes caught by small otter trawl on the south-eastern coast of Korea. Acta Ichthyol. Piscat. 45 (4): 427-431.Abstract. We present herewith the relations between total length and weight (LWRs) for 29 fi sh species from the southern coast of the East Sea (=Sea of Japan) The fi shes examined in the presently reported study were collected off the south-eastern coast of Korea. The study area, in terms of its environmental and geographical characteristics, differs generally from other coastal marine ecosystems in the east and south seas of Korea (Suh et al. 2001). It is a habitat for many commercially important demersal fi sh species and has been renowned for being abundant in prey organisms (Kim unpublished ** ). However, little is known on the ecology of the fi shes living in the area.Length-weight relation (LWR) parameters (a, b) are useful in the assessment of fi sh stocks and populations (Ricker 1968, Froese 2006. LWRs are used to estimate the mean weight for a given length group and convert length observations into weights to provide a measure of biomass (Froese 2006, Froese et al. 2011. LWRs also allow for life history and morphological comparisons between different fi sh species or between fi sh populations from different habitats and/or regions (Gonçalves et al. 1997). Although LWRs of scorpionfi shes and righteye fl ounders inhabiting south-eastern coast of Korea have been reported (Baeck et al. 2012(Baeck et al. , 2014 Fish specimens were collected monthly from January to December 2006 off the south-eastern coast of Korea (35°15′~35°17′N, 129°18′~129°21′E) from depths between 30 and 60 m using a small otter trawl. Fish samples were immediately packed with ice and taken to the laboratory for measurement of total length (TL) and wet weight to the nearest millimetre and gram, respectively. All scientifi c names were verifi ed following FishBase (Froese and Pauly 2015).For each species, the weight-length relation was determined based on the formula:where W is the wet weight [g], L is total length [cm], and a and b are the intercept and allometric coeffi cient, respectively. Parameters a and b were estimated using a simple linear regression analysis of log-transformed data. Extreme outliers were removed before fi tting the linear regression (Froese et al. 2011). The 95% confidence intervals (CIs) of parameters a and b and the statistical signifi cance level of r 2 were estimated using SYS-TAT software (Systat, version 12. SPSS, USA). LWRs were summarized over all months. Seasonal LWRs, each spring (March-May), summer (June-August), autumn (September-November), and winter (December-February), were also estimated for species where more than 30 specimens were collected for each season. Analysis of covariance (ANCOVA) was used to determine significant differences in the slopes of length-weight regressions between seasons.Length-weight regressions were applied to 16 456 specimens of the 29 species from 24 families. Comparing with information in Fish...

Length-Weight Relationships and Condition Factor of Six Sole Fish species from Coastal Waters of Pakistan

“…with the "b" values (3.043) for P. javanicus, is comparable to the reported values 3.207 for the same species [29]. Cynoglossus arel was the third most abundant species showed the significant correlation (R 2 = 0.68) between length-weight relationship with a positive allometry (Figure 4).…”

Length-weight relationships of three fish species from Liaodong Bay, Bohai Sea, China

“…The differences in b values for L. tanakae were detected when compared to previous studies (Park & Huh, 2015;Xue et al, 2011).…”

Length-weight and length-length relationships for six commercial fishes from southern Korean waters

“…The LWRs and LLRs estimated in FishBase, however, were based on insufficient sample numbers and narrow size ranges, which prevented direct comparisons with the results of this study. However, the LWRs and LLRs of D. berycoides , H. agrammus , H. otakii and A. schlegelii reported from the southern Korean waters (Park & Huh, ), the Davao Gulf, Philippines (Gumanao, Saceda Cardoza, Mueller, & Bos, ), the southwestern coast of Taiwan (Chu, Wang, Hou, Ueng, & Chu, ), and the Yellow Sea (Wang et al., ; Xue et al., ) used sufficient sample numbers and wider length ranges. Our LWR estimates were compared with the Bayesian estimates of LWRs in FishBase (Froese, Thorson, & Reyes, ), and fell within the ranges expected for each species or the family and body shape to which they belong.…”

“…However, the LWRs and LLRs of D. berycoides, H. agrammus, H. otakii and A. schlegelii reported from the southern Korean waters (Park & Huh, 2015), the Davao Gulf, Philippines (Gumanao, Saceda Cardoza, Mueller, & Bos, 2016), the southwestern coast of Taiwan (Chu, Wang, Hou, Ueng, & Chu, 2011), and the Yellow Sea (Wang et al, 2016;Xue et al, 2011) used sufficient sample numbers and wider length ranges.…”