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Titolo:
A new model of growth back-calculation incorporating age effect based on otoliths
Autore:
Morita, K; Matsuishi, T;
Indirizzi:
Hokkaido Univ, Fac Fisheries, Hakodate, Hokkaido 0418611, Japan Hokkaido Univ Hakodate Hokkaido Japan 0418611 te, Hokkaido 0418611, Japan
Titolo Testata:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
fascicolo: 9, volume: 58, anno: 2001,
pagine: 1805 - 1811
SICI:
0706-652X(200109)58:9<1805:ANMOGB>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATIC GROWTH; FISH; LEUCOMAENIS; AURATUS; WEIGHT; SALMON; SCALES; SIZE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Morita, K Hokkaido Univ, Fac Fisheries, Hakodate, Hokkaido 0418611, Japan Hokkaido Univ Hakodate Hokkaido Japan 0418611 do 0418611, Japan
Citazione:
K. Morita e T. Matsuishi, "A new model of growth back-calculation incorporating age effect based on otoliths", CAN J FISH, 58(9), 2001, pp. 1805-1811

Abstract

We developed a simple back-calculation model that includes the age effect in which otolith size increases continuously during no-growth periods. To evaluate the validity of our proposed model, we back-calculated the past fish lengths and growth rates using the new model and seven traditional back-calculation models (scale-proportional hypothesis (SPH), body-proportional hypothesis (BPH), Fraser-Lee, biological intercept, nonlinear SPH, nonlinearBPH, and modified Fry) using the otoliths of individually tag-recaptured white-spotted char (Salvelinus leucomaenis). The estimated fish lengths corresponded well to observed fish lengths for simple traditional (SPH, BPH, and Fraser-Lee) and the new models. However, the back-calculated growth ratesdid not correspond to observed growth rates except for the new model. All previous models had considerable bias; growth rates of slow-growing fish were overestimated. As our model incorporating the age effect did not show such bias, this bias would be attributed to the age effect. Our proposed back-calculation model incorporating the age effect should be useful to estimate past growth rates at the individual level.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 13:24:10