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, A.C., Sáez, M.B., Rico, M.R., Jaureguizar, A.J.
Formato: JOUR
Materias:
Age determination
Brazilian flathead
Growth
Otolith
Percophis brasiliensis
Southwest Atlantic
Validation
Kathetostoma giganteum
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0718560X_v39_n2_p297_Barretto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0718560X_v39_n2_p297_Barretto2023-10-03T15:36:33Z Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S) Barretto, A.C. Sáez, M.B. Rico, M.R. Jaureguizar, A.J. Age determination Brazilian flathead Growth Otolith Percophis brasiliensis Southwest Atlantic Validation Kathetostoma giganteum Percophis brasiliensis 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, t 0 = -2.02 years), winter (L ∞ = 58.7 cm, k = 0.21 year -1, t 0 = -2.90 years); females: spring (L ∞ = 65.2 cm, k = 0.29 year -1, t 0 = -1.15 years), winter (L ∞ = 63.5 cm, k = 0.26 year -1, t 0 = -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. Fil:Barretto, A.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jaureguizar, A.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0718560X_v39_n2_p297_Barretto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Age determination
Brazilian flathead
Growth
Otolith
Percophis brasiliensis
Southwest Atlantic
Validation
Kathetostoma giganteum
Percophis brasiliensis
spellingShingle Age determination
Brazilian flathead
Growth
Otolith
Percophis brasiliensis
Southwest Atlantic
Validation
Kathetostoma giganteum
Percophis brasiliensis
Barretto, A.C.
Sáez, M.B.
Rico, M.R.
Jaureguizar, A.J.
Age determination, validation, and growth of Brazilian flathead (Percophis brasiliensis) from the southwest Atlantic coastal waters (34°-41°S)
topic_facet Age determination
Brazilian flathead
Growth
Otolith
Percophis brasiliensis
Southwest Atlantic
Validation
Kathetostoma giganteum
Percophis brasiliensis
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, t 0 = -2.02 years), winter (L ∞ = 58.7 cm, k = 0.21 year -1, t 0 = -2.90 years); females: spring (L ∞ = 65.2 cm, k = 0.29 year -1, t 0 = -1.15 years), winter (L ∞ = 63.5 cm, k = 0.26 year -1, t 0 = -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.
format JOUR
author Barretto, A.C.
Sáez, M.B.
Rico, M.R.
Jaureguizar, A.J.
author_facet Barretto, A.C.
Sáez, M.B.
Rico, M.R.
Jaureguizar, A.J.
author_sort Barretto, A.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)
url http://hdl.handle.net/20.500.12110/paper_0718560X_v39_n2_p297_Barretto
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