Application of the Relative Weight Index to Juvenile Walleyes

Application of the Relative Weight Index to Juvenile Walleyes

Weight‐length data for juvenile walleyes Stizostedion vitreum from 39 populations (N = 2,006) in seven states were used to develop a standard weight (Ws) equation. We used the regression‐line‐percentile technique, which provides a 75th‐percentile standard, to develop the equation. The proposed Ws eq...

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Veröffentlicht in:North American journal of aquaculture 1999-10, Vol.61 (4), p.310-314
Hauptverfasser: Flammang, Mark K., Olson, Julaine A., Willis, David W.
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Freshwater
Stizostedion vitreum
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container_title North American journal of aquaculture
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creator Flammang, Mark K.
Olson, Julaine A.
Willis, David W.
description Weight‐length data for juvenile walleyes Stizostedion vitreum from 39 populations (N = 2,006) in seven states were used to develop a standard weight (Ws) equation. We used the regression‐line‐percentile technique, which provides a 75th‐percentile standard, to develop the equation. The proposed Ws equation is log10 Ws(g) = −4.804 + 2.869 log10total length (TL, mm). The equivalent in English units is log10 Ws(lb) = −3.431 + 2.869 log10TL(in). The walleye Ws equation is valid for juvenile fish between 30 and 149 mm. This proposed Ws equation should serve as a basis for further evaluation of Wr as an index and the continued development of Ws equations for juvenile fishes.
doi_str_mv 10.1577/1548-8454(1999)061<0310:AOTRWI>2.0.CO;2
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subjects Freshwater
Stizostedion vitreum
title Application of the Relative Weight Index to Juvenile Walleyes
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