Length‐weight relationships of six tropical estuarine fish species from Pulicat lagoon, India

Abstract

Length-weight relationships (LWRs) of six finfish species under two families of the order Perciformes collected from Pulicat lagoon (India) are presented in this study.The fish specimens were collected weekly from the catches of shore seine net (with a mesh size of 50mm at the main webbing and 10 mm at the cod end) operated in the lagoon at an average depth of 2.5 m by the local fishermen during the period from July 2018 to April 2019. This study reports the LWRs for five gobiid and one siganid fish species which have no earlier reports on LWRs. The calculated 'b' value ranged from 3.538 (Favonigobius reichei) to 2.677 (Oxyurichthys microlepis) and 'a' value varied from 0.0041 (Favonigobius reichei) to 0.0199 (Acentrogobius cyanomos).This study also reports the new maximum total length (TL max ) for the gobiid fish species Oxyurichthys microlepis.

Length-weight and Length-length Relationships of Farmed Catla catla during Winter Season from Muzaffargarh, Pakistan

“…Whereas, condition factor value was ranged from 1.41 to 1.56, with a mean 1.49±0.04. The high coefficient of determination values achieved in the calculation of LWR and LLRs in the present study reduced ambiguity (Nallathambi et al, 2020) and indicated a good quality of the prediction and small dispersion of the data (Correia et al, 2018) for linear regression in the observed fish specimens of Catla catla.…”

Length‐weight relationships of three Clupeiformes species from the Southeast coast of India, Bay of Bengal, Eastern Indian Ocean

“…The present study showed that 'b' values of 3.1215-3.1819 may be considered within the expected range of fishes (Froese, 2006;Sivadas, Sureshkumar, & Kannan, 2020) as different variables including sampling preference such as different fishing gears and mesh size, geographic area, seasons, feeding habits, population, gonad condition, parasitic infection, physiological factors and environmental parameter may affect the outcome of the study (Moutopoulos & Stergiou, 2002). The lower r 2 values in this study might be due to following limitation (a) measurements were made very restricted to narrow size range of these species, where the smaller size classes were missing (b) observation of similar body form during different seasons (Gupta, Sarkar, Bhardwaj, & Pal, 2011) (c) over-representation of the certain size range (Kodeeswaran et al, 2020) and (d) different geographic collection (Moulitharan et al, 2020). This study can be used to understand the basic biological parameters of these clupeid fishes.…”

Length-weight-relationship of two Ictalurid catfish species from an artisanal fishery in central México

“…The most appreciated species by fishermen are two catfishes that belong to the Ictaluridae family, Ictalurus balsanus (Jordan & Snyder, 1899) [11] a native of the basin, and I. punctatus (Rafinesque, 1818) [19] which was introduced as a fishing alternative (Mejía-Mojica et al, 2013) [14] . The introduction of exotic species to native ecosystems, in conjunction with the over-exploitation of fishery resources, are among the main threats to fish diversity, and directly impact ecosystem functioning ( [22,23,13,9,17,4] . This research analyzes the length-weight relationship for these two catfish species, which are subject to lowscale commercial fishing.…”