Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic
Reproductive biology and habitat preferences of the white trevally, Pseudocaranx dentex (Carangidae), were studied in the Azores islands, central north Atlantic, to determine the spatial and seasonal dynamics of habitat use of immature and mature fish. The sex ratio was close to 1:1 and fish matured...
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Consejo Superior de Investigaciones Científicas
2008
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ftdoajarticles:oai:doaj.org/article:c4f665289bf248ffaf725e119b8a8118 2023-05-15T17:30:23+02:00 Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic Pedro Afonso Jorge Fontes Telmo Morato Kim N. Holland Ricardo S. Santos 2008-06-01T00:00:00Z https://doi.org/10.3989/scimar.2008.72n2373 https://doaj.org/article/c4f665289bf248ffaf725e119b8a8118 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/854 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2008.72n2373 https://doaj.org/article/c4f665289bf248ffaf725e119b8a8118 Scientia Marina, Vol 72, Iss 2, Pp 373-381 (2008) trevally reproduction spawning habitat offshore reefs marine reserves Aquaculture. Fisheries. Angling SH1-691 article 2008 ftdoajarticles https://doi.org/10.3989/scimar.2008.72n2373 2022-12-31T09:34:29Z Reproductive biology and habitat preferences of the white trevally, Pseudocaranx dentex (Carangidae), were studied in the Azores islands, central north Atlantic, to determine the spatial and seasonal dynamics of habitat use of immature and mature fish. The sex ratio was close to 1:1 and fish matured at about 30 cm fork length. There were no differences in the maturation or length-weight relationships between sexes. The spawning season lasts from June to September. Underwater visual censuses showed that schools of mature individuals preferentially aggregate around the summits of offshore reefs during the spawning season. In contrast, schools of smaller, immature fish use inshore habitats all year round. Our data support the hypothesis that offshore reefs are a preferential spawning habitat of larger white trevally, and most possibly for a number of visitor pelagic predators as well. Inverse relationships between exploitation levels, abundance and size composition at the two different islands suggest that the summer fishery targeting trevally schools around offshore reefs has negatively impacted the population. These findings bring additional ecological and management relevance to offshore reefs. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Scientia Marina 72 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
trevally reproduction spawning habitat offshore reefs marine reserves Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
trevally reproduction spawning habitat offshore reefs marine reserves Aquaculture. Fisheries. Angling SH1-691 Pedro Afonso Jorge Fontes Telmo Morato Kim N. Holland Ricardo S. Santos Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
topic_facet |
trevally reproduction spawning habitat offshore reefs marine reserves Aquaculture. Fisheries. Angling SH1-691 |
description |
Reproductive biology and habitat preferences of the white trevally, Pseudocaranx dentex (Carangidae), were studied in the Azores islands, central north Atlantic, to determine the spatial and seasonal dynamics of habitat use of immature and mature fish. The sex ratio was close to 1:1 and fish matured at about 30 cm fork length. There were no differences in the maturation or length-weight relationships between sexes. The spawning season lasts from June to September. Underwater visual censuses showed that schools of mature individuals preferentially aggregate around the summits of offshore reefs during the spawning season. In contrast, schools of smaller, immature fish use inshore habitats all year round. Our data support the hypothesis that offshore reefs are a preferential spawning habitat of larger white trevally, and most possibly for a number of visitor pelagic predators as well. Inverse relationships between exploitation levels, abundance and size composition at the two different islands suggest that the summer fishery targeting trevally schools around offshore reefs has negatively impacted the population. These findings bring additional ecological and management relevance to offshore reefs. |
format |
Article in Journal/Newspaper |
author |
Pedro Afonso Jorge Fontes Telmo Morato Kim N. Holland Ricardo S. Santos |
author_facet |
Pedro Afonso Jorge Fontes Telmo Morato Kim N. Holland Ricardo S. Santos |
author_sort |
Pedro Afonso |
title |
Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
title_short |
Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
title_full |
Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
title_fullStr |
Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
title_full_unstemmed |
Reproduction and spawning habitat of white trevally, Pseudocaranx dentex, in the Azores, central north Atlantic |
title_sort |
reproduction and spawning habitat of white trevally, pseudocaranx dentex, in the azores, central north atlantic |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2008 |
url |
https://doi.org/10.3989/scimar.2008.72n2373 https://doaj.org/article/c4f665289bf248ffaf725e119b8a8118 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Scientia Marina, Vol 72, Iss 2, Pp 373-381 (2008) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/854 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.2008.72n2373 https://doaj.org/article/c4f665289bf248ffaf725e119b8a8118 |
op_doi |
https://doi.org/10.3989/scimar.2008.72n2373 |
container_title |
Scientia Marina |
container_volume |
72 |
container_issue |
2 |
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1766126750323965952 |