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Length–weight relationships of six indigenous fish species from the River Cauvery and its estuary, India
Author(s) -
Roshith Chakkiyath Madayi,
Manna Ranjan Kumar,
Suresh Vettath Raghavan,
Samanta Srikanta,
Baitha Raju,
Koushlesh Satish K.,
Salim Sibina Mol,
Kumar Lohith,
Sharma Shravan Kumar,
Roychowdhury Ashis,
Vijayakumar Muttanahalli Eregowda,
Pal Rakesh,
Das Basanta Kumar
Publication year - 2021
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.14190
Subject(s) - estuary , biology , sciaenidae , fishery , calipers , monsoon , sampling (signal processing) , fish <actinopterygii> , veterinary medicine , ecology , oceanography , mathematics , medicine , geometry , filter (signal processing) , computer science , computer vision , geology
The present study estimated length–weight relationships (LWRs) for six indigenous fish species ( Barilius gatensis , Salmostoma acinaces , S. boopis , Puntius amphibius , Hemibagrus punctatus and Ambassis miops ) based on specimens collected from River Cauvery (including estuary) during July 2017–January 2020. The sampling surveys were carried out in three distinct sampling seasons, viz., the pre‐monsoon (March–May), the monsoon (July–October) and the post‐monsoon (November–February). Majority of the fish specimens dealt in the study were collected from multi‐meshed monofilament gill nets (mesh sizes 18, 30, 45, 60, 90, 110, 120 and 150 mm) operated by local fishers. For those sites situated in the protected areas, sampling was carried out by cast nets with prior permission from the local administration and the collected fishes were released back into river after length–weight measurements. The length measurements were noted as total length (TL) measured to the nearest 0.1 cm by using a digital Vernier caliper. A digital balance was used for weight measurements with an accuracy of 0.01 g. The study recorded a new maximum length of 48 cm for H. punctatus . The LWR data generated from the present study are significant for proper assessment of the stock status and their management, if collected together with other essential biological and physical parameters.