Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Biology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017 |
Resumo: | Oceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vitória-Trindade seamounts. We observed 19 groups of cetaceans along a 1300-km search trajectory, with six species being identified: the humpback whale (Megaptera novaeangliae, N = 9 groups), the fin whale (Balaenoptera physalus, N = 1), the Antarctic minke whale (Balaenoptera bonaerensis, N = 1), the rough-toothed dolphin (Steno bredanensis, N = 1), the bottlenose dolphin (Tursiops truncatus, N = 2), and the killer whale (Orcinus orca, N = 1). Most humpback whale groups (N = 7; 78%) were observed in the Vitória-Trindade seamounts, especially the mounts close to the Abrolhos Bank. Only one lone humpback whale was observed near Trindade Island after a search effort encompassing more than 520 km. From a total of 28 acoustic stations, humpback whale songs were only detected near the seamounts close to the Abrolhos Bank, where most groups of this species were visually detected (including a competitive group and groups with calves). The presence of humpback whales at the Trindade Island and surroundings is most likely occasional, with few sightings and low density. Finally, we observed a significant number of humpback whales along the seamounts close to the Abrolhos Bank, which may function as a breeding habitat for this species. We also added important records regarding the occurrence of cetaceans in these mounts and in the Western South Atlantic, including the endangered fin whale. |
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Brazilian Journal of Biology |
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Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic OceanMegaptera novaeangliaeBalaenoptera physalusBalaenoptera bonaerensisOrcinus orcaSteno bredanensisTursiops truncatusseamountsBrazilOceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vitória-Trindade seamounts. We observed 19 groups of cetaceans along a 1300-km search trajectory, with six species being identified: the humpback whale (Megaptera novaeangliae, N = 9 groups), the fin whale (Balaenoptera physalus, N = 1), the Antarctic minke whale (Balaenoptera bonaerensis, N = 1), the rough-toothed dolphin (Steno bredanensis, N = 1), the bottlenose dolphin (Tursiops truncatus, N = 2), and the killer whale (Orcinus orca, N = 1). Most humpback whale groups (N = 7; 78%) were observed in the Vitória-Trindade seamounts, especially the mounts close to the Abrolhos Bank. Only one lone humpback whale was observed near Trindade Island after a search effort encompassing more than 520 km. From a total of 28 acoustic stations, humpback whale songs were only detected near the seamounts close to the Abrolhos Bank, where most groups of this species were visually detected (including a competitive group and groups with calves). The presence of humpback whales at the Trindade Island and surroundings is most likely occasional, with few sightings and low density. Finally, we observed a significant number of humpback whales along the seamounts close to the Abrolhos Bank, which may function as a breeding habitat for this species. We also added important records regarding the occurrence of cetaceans in these mounts and in the Western South Atlantic, including the endangered fin whale.Instituto Internacional de Ecologia2014-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017Brazilian Journal of Biology v.74 n.1 2014reponame:Brazilian Journal of Biologyinstname:Instituto Internacional de Ecologia (IIE)instacron:IIE10.1590/1519-6984.21812info:eu-repo/semantics/openAccessWedekin,LLRossi-Santos,MRBaracho,CCypriano-Souza,ALSimões-Lopes,PCeng2015-10-27T00:00:00Zoai:scielo:S1519-69842014000100017Revistahttps://www.scielo.br/j/bjb/https://old.scielo.br/oai/scielo-oai.phpbjb@bjb.com.br||bjb@bjb.com.br1678-43751519-6984opendoar:2015-10-27T00:00Brazilian Journal of Biology - Instituto Internacional de Ecologia (IIE)false |
dc.title.none.fl_str_mv |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
title |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
spellingShingle |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean Wedekin,LL Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil |
title_short |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
title_full |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
title_fullStr |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
title_full_unstemmed |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
title_sort |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
author |
Wedekin,LL |
author_facet |
Wedekin,LL Rossi-Santos,MR Baracho,C Cypriano-Souza,AL Simões-Lopes,PC |
author_role |
author |
author2 |
Rossi-Santos,MR Baracho,C Cypriano-Souza,AL Simões-Lopes,PC |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Wedekin,LL Rossi-Santos,MR Baracho,C Cypriano-Souza,AL Simões-Lopes,PC |
dc.subject.por.fl_str_mv |
Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil |
topic |
Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil |
description |
Oceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vitória-Trindade seamounts. We observed 19 groups of cetaceans along a 1300-km search trajectory, with six species being identified: the humpback whale (Megaptera novaeangliae, N = 9 groups), the fin whale (Balaenoptera physalus, N = 1), the Antarctic minke whale (Balaenoptera bonaerensis, N = 1), the rough-toothed dolphin (Steno bredanensis, N = 1), the bottlenose dolphin (Tursiops truncatus, N = 2), and the killer whale (Orcinus orca, N = 1). Most humpback whale groups (N = 7; 78%) were observed in the Vitória-Trindade seamounts, especially the mounts close to the Abrolhos Bank. Only one lone humpback whale was observed near Trindade Island after a search effort encompassing more than 520 km. From a total of 28 acoustic stations, humpback whale songs were only detected near the seamounts close to the Abrolhos Bank, where most groups of this species were visually detected (including a competitive group and groups with calves). The presence of humpback whales at the Trindade Island and surroundings is most likely occasional, with few sightings and low density. Finally, we observed a significant number of humpback whales along the seamounts close to the Abrolhos Bank, which may function as a breeding habitat for this species. We also added important records regarding the occurrence of cetaceans in these mounts and in the Western South Atlantic, including the endangered fin whale. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1519-6984.21812 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Instituto Internacional de Ecologia |
publisher.none.fl_str_mv |
Instituto Internacional de Ecologia |
dc.source.none.fl_str_mv |
Brazilian Journal of Biology v.74 n.1 2014 reponame:Brazilian Journal of Biology instname:Instituto Internacional de Ecologia (IIE) instacron:IIE |
instname_str |
Instituto Internacional de Ecologia (IIE) |
instacron_str |
IIE |
institution |
IIE |
reponame_str |
Brazilian Journal of Biology |
collection |
Brazilian Journal of Biology |
repository.name.fl_str_mv |
Brazilian Journal of Biology - Instituto Internacional de Ecologia (IIE) |
repository.mail.fl_str_mv |
bjb@bjb.com.br||bjb@bjb.com.br |
_version_ |
1752129880070291456 |