Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)

The age and growth parameters of Brazilian flathead, Percophis brasiliensis, from the southwest Atlantic coastal waters (34°-41°S) were determined for samples collected in spring (n = 853; years 1998 and 2000) and winter (n = 596; year 2004), whereas age was validated through the edge analysis of ot...

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Autores principales:	Barretto,Alfredo C, Sáez,Margarita B, Rico,María R, Jaureguizar,Andrés J
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2011
Materias:	Brazilian flathead Percophis brasiliensis age determination otolith validation growth southwest Atlantic
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200011
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spelling	oai:scielo:S0718-560X20110002000112011-07-26Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)Barretto,Alfredo CSáez,Margarita BRico,María RJaureguizar,Andrés J Brazilian flathead Percophis brasiliensis age determination otolith validation growth southwest Atlantic The age and growth parameters of Brazilian flathead, Percophis brasiliensis, from the southwest Atlantic coastal waters (34°-41°S) were determined for samples collected in spring (n = 853; years 1998 and 2000) and winter (n = 596; year 2004), whereas age was validated through the edge analysis of otoliths collected in 2007 (n = 1367 otoliths). The indices of precision APE, V, and D were used to test the reproducibility, between agers, of the ages determined from 845 otoliths. Maximum determined ages were 19 years for males and 15 years for females. One opaque and one translucent band are laid down per year, in the sagittal otolith. According to the APE (0.668%), V (1.121%), and D (0.647%) indices, the age determination was consistent. Von Bertalanffy's growth parameters [males: spring (L∞ = 58.1 cm, k = 0.26 year-1, t0= -2.02 years), winter (L∞ = 58.7 cm, k = 0.21 year-1, t0 = -2.90 years); females: spring (L∞ = 65.2 cm, k = 0.29 year-1, t0 = -1.15 years), winter (L∞= 63.5 cm, k = 0.26 year-1, t0 = -2.01 years)] were significantly different between sexes and seasons. From the first year of life, females grow faster and reach greater lengths than males of the same age due, probably, to an asynchronism in the sexual maturity.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.39 n.2 20112011-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200011en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Brazilian flathead Percophis brasiliensis age determination otolith validation growth southwest Atlantic
spellingShingle	Brazilian flathead Percophis brasiliensis age determination otolith validation growth southwest Atlantic Barretto,Alfredo C Sáez,Margarita B Rico,María R Jaureguizar,Andrés J Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
description	The age and growth parameters of Brazilian flathead, Percophis brasiliensis, from the southwest Atlantic coastal waters (34°-41°S) were determined for samples collected in spring (n = 853; years 1998 and 2000) and winter (n = 596; year 2004), whereas age was validated through the edge analysis of otoliths collected in 2007 (n = 1367 otoliths). The indices of precision APE, V, and D were used to test the reproducibility, between agers, of the ages determined from 845 otoliths. Maximum determined ages were 19 years for males and 15 years for females. One opaque and one translucent band are laid down per year, in the sagittal otolith. According to the APE (0.668%), V (1.121%), and D (0.647%) indices, the age determination was consistent. Von Bertalanffy's growth parameters [males: spring (L∞ = 58.1 cm, k = 0.26 year-1, t0= -2.02 years), winter (L∞ = 58.7 cm, k = 0.21 year-1, t0 = -2.90 years); females: spring (L∞ = 65.2 cm, k = 0.29 year-1, t0 = -1.15 years), winter (L∞= 63.5 cm, k = 0.26 year-1, t0 = -2.01 years)] were significantly different between sexes and seasons. From the first year of life, females grow faster and reach greater lengths than males of the same age due, probably, to an asynchronism in the sexual maturity.
author	Barretto,Alfredo C Sáez,Margarita B Rico,María R Jaureguizar,Andrés J
author_facet	Barretto,Alfredo C Sáez,Margarita B Rico,María R Jaureguizar,Andrés J
author_sort	Barretto,Alfredo C
title	Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
title_short	Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
title_full	Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
title_fullStr	Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
title_full_unstemmed	Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
title_sort	age determination, validation, and growth of brazilian flathead (percophis brasiliensis) from the southwest atlantic coastal waters (34°-41°s)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200011
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Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)

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