Length-weight relationships of three fish species from the Arial Khan River, an outlet of the river Padma, Bangladesh

Abstract

Summary The present study narrated the length–weight relationships (LWRs) of three fish species Salmophasia sardinella (Valenciennes, 1844), Amblypharyngodon microlepis (Bleeker, 1853) and Macrognathus aral (Bloch & Scheider, 1801) from the Arial Khan River, a south‐eastward outlet of the river Padma, Bangladesh. Fish samples were collected monthly basis from fishermen who used cast nets (mesh size <0.5 cm) and set bag nets (mesh size 0.5 cm) for catching fish species from January to December, 2016. The growth coefficient b in LWRs were 3.004, 3.001 and 2.936 for M. aral, S. sardinella and A. microlepis, respectively.

Length-weight relationships of Acanthopagrus longispinnis (Valenciennes, 1830), Raconda russeliana (Gray, 1831) and Coilia neglecta (Whitehead, 1967) from the Bay of Bengal coast, Bangladesh

“…During the study period, specimens of each species from juvenile and adult stage were examined to attain a better species‐specific estimate (Rastgoo, Fatemi,Valinassab, & Mortazavi, ; Siddik et al, ). The estimated values of coefficient of allometry ( b ) of three species remained within the expected limits of 2.5 to 3.5, which are in line with the finding of other researchers (Froese, ; Siddik, Hanif, & Chaklader, ; Siddik, Hanif, Chaklader, Nahar, & Mahmud, ; Siddik, Hanif, Nahar, Chaklader, & Kleindienst, ). The coefficient of allometry ( b ) for A. longispinnis was 3.192, which exceeded the Bayesian prediction (2.95) based on sub family body shape (Froese, Thorson, & Reyes, ).…”

Length‐weight relationships of seven cyprinid fish species from the Kaptai Lake, Bangladesh

“…The a and b value of al species in the present study were between the expected range predicted by Froese () and 95% confidence limits of the Bayesian LWR prediction value in Fishbase (Froese & Pauly, ). Parameter b > 3.0 is the indication of highly nourished adult specimens, b = 3.0 indicates similar growth pattern from small to larger size population and b < 3.0 indicates faster growth in length than weight and robustness of small‐sized specimens (Siddik, Hanif, & Chaklader, ). The value of slope b can differ mainly due to several environmental (habitat, season), arti‐factual (length type, size range, specimen number) and biological (sex, maturation of gonad, diet, degree of stomach fullness, growth phase) factors (De La Cruz‐Agüero, Moncayo‐ Estrada, Chollet‐Villalpando, & Cota‐Gómez, ; Hanif et al, ; Nahar, Hanif, Siddik, Chaklader, & Islam, ).…”

Length–weight relationships of three carangid fish species Alepes vari (Cuvier, 1833), Uraspis uraspis (Günther, 1860) and Carangiodes oblongus (Cuvier, 1833) from the Bay of Bengal coast, Bangladesh

“…All regressions of LWRs for three species were highly significant ( p < 0.001) with r 2 value>0.95 which demonstrates proper fitness of model as regression coefficient close to 1 indicates a tight correlation of the data (Hanif, Siddik, Chaklader, Pham, & Kleindienst, ). The calculated value of “ b” for all three species variated within the expected limit 2.5–3.5 (Hanif, Islam, Siddik, & Chaklader, ; Islam et al, ; Nahar, Hanif, Siddik, Chaklader, & Islam, ; Siddik, Hanif, & Chaklader, ; Siddik, Hanif, Chaklader, Nahar, & Mahmud, ). For A. vari , b ≈ 3 which indicates that small size individuals in the sample have similar form as larger size one (Froese, ; Jabeen, Choudhury, & Sarma, ) while for U. uraspis and C. oblongus , b < 3 indicates both the species grow faster in length compared to weight and small‐sized individuals were in good nutritional condition during the sampling period.…”