Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil
Biological aspects of sailfin dory, Zenopsis conchifer, were studied from 839 individuals obtained from deep-sea commercial bottom trawling off southern Brazil at depths up to 526 m in 2002 and 2003. Samples included fish from 101 mm Lt and 15 g up to 640 mm Lt and 2,9 g. The sex-ratio was 50% at 15...
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Universidade de São Paulo
2012-06-01
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doaj-918d9c91226749e1b642df21a07384af2020-11-25T00:46:43ZengUniversidade de São PauloBrazilian Journal of Oceanography 1679-87591982-436X2012-06-0160217117910.1590/S1679-87592012000200007Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern BrazilRodrigo Silvestre MartinsPaulo Ricardo SchwingelBiological aspects of sailfin dory, Zenopsis conchifer, were studied from 839 individuals obtained from deep-sea commercial bottom trawling off southern Brazil at depths up to 526 m in 2002 and 2003. Samples included fish from 101 mm Lt and 15 g up to 640 mm Lt and 2,9 g. The sex-ratio was 50% at 150 mm Lt and between 300-350 mm Lt, with females outnumbering males in the remaining size classes. Reproductive activity seems to peak between July and August (austral winter). Size at attainment of 50% maturity (Lt50) was 311 mm Lt in females. The mean length and maturity of the specimens increased with depth, suggesting that larger fish concentrate in deeper waters.<br>Aspectos biológicos do peixe-galo-de-profundidade, Zenopsis conchifer, foram estudados a partir de 839 peixes amostrados na pesca comercial de arrasto de profundidade (até 526 m) no sul do Brasil entre 2002 e 2003. As amostras incluíram peixes entre 101 mm TL e 15 g até 640 mm TL e 2.952 g. A proporção sexual foi próxima à paridade na classe de tamanho de 150 mm TL e entre 300-350 mm TL, sendo que as fêmeas predominaram nas demais classes. A atividade reprodutiva apresentou um pico durante o inverno. O tamanho de primeira maturação (TL50) nas fêmeas foi de 311 mm TL. Os comprimentos corporais e a maturidade sexual aumentaram com a profundidade, sugerindo que os maiores exemplares se concentram águas profundas.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000200007Zeidaeestrutura de tamanhosproporção sexualmaturidadebatimetriasul do BrasilZeidaesize structuresex ratiomaturitybathymetrysouthern Brazil |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rodrigo Silvestre Martins Paulo Ricardo Schwingel |
spellingShingle |
Rodrigo Silvestre Martins Paulo Ricardo Schwingel Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil Brazilian Journal of Oceanography Zeidae estrutura de tamanhos proporção sexual maturidade batimetria sul do Brasil Zeidae size structure sex ratio maturity bathymetry southern Brazil |
author_facet |
Rodrigo Silvestre Martins Paulo Ricardo Schwingel |
author_sort |
Rodrigo Silvestre Martins |
title |
Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil |
title_short |
Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil |
title_full |
Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil |
title_fullStr |
Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil |
title_full_unstemmed |
Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil |
title_sort |
biological aspects of the sailfin dory zenopsis conchifer (lowe, 1852) caught by deep-sea trawling fishery off southern brazil |
publisher |
Universidade de São Paulo |
series |
Brazilian Journal of Oceanography |
issn |
1679-8759 1982-436X |
publishDate |
2012-06-01 |
description |
Biological aspects of sailfin dory, Zenopsis conchifer, were studied from 839 individuals obtained from deep-sea commercial bottom trawling off southern Brazil at depths up to 526 m in 2002 and 2003. Samples included fish from 101 mm Lt and 15 g up to 640 mm Lt and 2,9 g. The sex-ratio was 50% at 150 mm Lt and between 300-350 mm Lt, with females outnumbering males in the remaining size classes. Reproductive activity seems to peak between July and August (austral winter). Size at attainment of 50% maturity (Lt50) was 311 mm Lt in females. The mean length and maturity of the specimens increased with depth, suggesting that larger fish concentrate in deeper waters.<br>Aspectos biológicos do peixe-galo-de-profundidade, Zenopsis conchifer, foram estudados a partir de 839 peixes amostrados na pesca comercial de arrasto de profundidade (até 526 m) no sul do Brasil entre 2002 e 2003. As amostras incluíram peixes entre 101 mm TL e 15 g até 640 mm TL e 2.952 g. A proporção sexual foi próxima à paridade na classe de tamanho de 150 mm TL e entre 300-350 mm TL, sendo que as fêmeas predominaram nas demais classes. A atividade reprodutiva apresentou um pico durante o inverno. O tamanho de primeira maturação (TL50) nas fêmeas foi de 311 mm TL. Os comprimentos corporais e a maturidade sexual aumentaram com a profundidade, sugerindo que os maiores exemplares se concentram águas profundas. |
topic |
Zeidae estrutura de tamanhos proporção sexual maturidade batimetria sul do Brasil Zeidae size structure sex ratio maturity bathymetry southern Brazil |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000200007 |
work_keys_str_mv |
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