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Empirical Percentile Standard Weight Equation for the Blacktail Redhorse
Author(s) -
Rypel Andrew L.,
Richter Tracy J.
Publication year - 2008
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/m07-193.1
Subject(s) - percentile , statistics , structural equation modeling , population , mathematics , demography , sociology
We generated a standard weight ( W s ) equation for the blacktail redhorse Moxostoma poecilurum by use of the empirical percentile (EmP) method. Length and weight data were compiled from 3,098 individuals representing 60 populations across five states in the southeastern USA. These data were subsequently used to create the W s equation. The species' total length (TL) constraints (130–450 mm) were used to produce the final W s equation: log 10 W s = −5.182 + 3.087 · log 10 TL. No length‐related bias could be detected from the equation, indicating that it is a strong W s equation. A separate data set from 42 populations and 179 individuals was used to validate the W s equation. We recommend use of this equation for assessment of blacktail redhorse population dynamics, and we contend that creation of EmP W s equations for other nongame fishes would be useful in management of fish communities as a whole.