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A Revised Standard Weight (WS) Equation for Spotted Bass
Author(s) -
Wiens Jennifer R.,
Guy Christopher S.,
Brown Michael L.
Publication year - 1996
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(1996)016<0958:arswwe>2.3.co;2
Subject(s) - percentile , bass (fish) , statistics , micropterus , mathematics , fish <actinopterygii> , standard error , range (aeronautics) , fishery , biology , materials science , composite material
Weight‐length data were compiled from 139 populations of spotted bass Micropterus punctulatus ( N = 26,289 fish) from 16 states within the geographic range of the species. The regression‐line‐percentile technique was applied to these data to develop a new 75th‐percentile standard weight ( W s ) equation. The revised W s . equation is log 10 W s = –5.392 + 3.215 log 10 TL, where W s is the standard weight in grams and TL is the total length in millimeters and is valid for fish 100–640 mm. The English‐unit equivalent is log 10 W s = –3.533 + 3.215 log 10 TL, where W s . is the standard weight in pounds and TL is in inches and is valid for fish 4–25 in. We found the current W s equation to be length biased, but no such bias was apparent in the new equation.