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Length–weight relationships for 19 Scorpion fishes (Scorpaenidae) from Visakhapatnam coast, India
Author(s) -
Naranji Muddula Krishna,
Velamala Govinda Rao,
Kandula Sujata
Publication year - 2018
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.13805
Subject(s) - fishing , fishery , allometry , biology , hook , scorpaenidae , bay , fish measurement , shore , fish <actinopterygii> , zoology , oceanography , ecology , geology , structural engineering , engineering
This study presents the length–weight relationships (LWRs) for 19 scorpionid species from Visakhapatnam coast, India. Samples were collected fortnightly between December 2010 and December 2013 from commercially operated fishing gears viz. gill nets (Hung length: 115–143 m and mesh size: 100–270 mm) operated at 20–30 m depth, shore seines (mesh size: 10–20 mm), trawls (head rope length: 37–46 m and cod end mesh size: 15–32 mm) operated at depth of 20–50 m from a fishing vessel of 9.6–11.1 m length overall (LAO) and hook and lines off Visakhapatnam coast, India (16.98 ° N–20 ° .2 N, Long. 82.19 ° –86.53 ° E). Most of the collected specimens are from multiday fisheries. A multiday fishing trip is of 6–12 days and an individual fishing vessel undertakes 2–3 such trips in 1 month. Soaking time of gill nets ranged from 4 to 7 hr while each trawl haul lasted for 3–4 hr. The fish specimens were taken to the laboratory in iced condition, where total length (TL), standard length (SL), and wet weight were measured to the nearest centimeter and gram, respectively. The allometric coefficient ( b value) for the estimated LWRs ranged from strongly hypoallometric (1.412) in case of Minous inermis to marginally hyperallometric (3.389) for Scorpaenopsis oxycephala . The r 2 values ranged from 0.9024 ( Pterois russelii ) to 0.98 ( Snyderinae guentheri ). Results provided herein are the baseline information for the species which can be used as an input or priors for subsequent biological investigations on scorpionfishes.