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Development and Evaluation of a Standard Weight (W s ) Equation for Blue Catfish
Author(s) -
Muoneke Maurice I.,
Pope Kevin L.
Publication year - 1999
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1999)019<0878:daeoas>2.0.co;2
Subject(s) - ictalurus , catfish , percentile , mathematics , statistics , standard error , regression analysis , body weight , zoology , fishery , biology , fish <actinopterygii> , endocrinology
Using a data set composed of 33 populations from six states, we employed the regression‐line‐percentile technique to develop a standard weight equation for blue catfish Ictalurus furcatus and validated it with an independent data set composed of 43 populations from 10 states. The equation is log 10 W s = −6.067 + 3.400 log 10 TL, where W s is standard weight in grams and TL is total length in millimeters. The English‐unit equivalent (pounds and inches) is log 10 W s = −3.950 + 3.400 log 10 TL. The equation is valid for blue catfish 160 mm (approximately 6 in) TL and longer. Relative weight (W r ) values computed with this equation did not exhibit any systematic length bias.