Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean
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 Vitó...
Published in: | Brazilian Journal of Biology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Instituto Internacional de Ecologia
|
Subjects: | |
Online Access: | https://doi.org/10.1590/1519-6984.21812 https://doaj.org/article/c0acc2ca21b74d7791607e903994c0e6 |
id |
ftdoajarticles:oai:doaj.org/article:c0acc2ca21b74d7791607e903994c0e6 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:c0acc2ca21b74d7791607e903994c0e6 2023-05-15T13:51:26+02:00 Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean LL Wedekin MR Rossi-Santos C Baracho AL Cypriano-Souza PC Simões-Lopes https://doi.org/10.1590/1519-6984.21812 https://doaj.org/article/c0acc2ca21b74d7791607e903994c0e6 EN eng Instituto Internacional de Ecologia http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017&lng=en&tlng=en https://doaj.org/toc/1678-4375 1678-4375 doi:10.1590/1519-6984.21812 https://doaj.org/article/c0acc2ca21b74d7791607e903994c0e6 Brazilian Journal of Biology, Vol 74, Iss 1, Pp 137-144 Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil Science Q Biology (General) QH301-705.5 Zoology QL1-991 Botany QK1-989 article ftdoajarticles https://doi.org/10.1590/1519-6984.21812 2022-12-31T05:17:45Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis Balaenoptera physalus Fin whale Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca South Atlantic Ocean Killer whale Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Lone ENVELOPE(11.982,11.982,65.105,65.105) Brazilian Journal of Biology 74 1 137 144 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil Science Q Biology (General) QH301-705.5 Zoology QL1-991 Botany QK1-989 |
spellingShingle |
Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil Science Q Biology (General) QH301-705.5 Zoology QL1-991 Botany QK1-989 LL Wedekin MR Rossi-Santos C Baracho AL Cypriano-Souza PC Simões-Lopes Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
topic_facet |
Megaptera novaeangliae Balaenoptera physalus Balaenoptera bonaerensis Orcinus orca Steno bredanensis Tursiops truncatus seamounts Brazil Science Q Biology (General) QH301-705.5 Zoology QL1-991 Botany QK1-989 |
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. |
format |
Article in Journal/Newspaper |
author |
LL Wedekin MR Rossi-Santos C Baracho AL Cypriano-Souza PC Simões-Lopes |
author_facet |
LL Wedekin MR Rossi-Santos C Baracho AL Cypriano-Souza PC Simões-Lopes |
author_sort |
LL Wedekin |
title |
Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean |
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 |
publisher |
Instituto Internacional de Ecologia |
url |
https://doi.org/10.1590/1519-6984.21812 https://doaj.org/article/c0acc2ca21b74d7791607e903994c0e6 |
long_lat |
ENVELOPE(11.982,11.982,65.105,65.105) |
geographic |
Antarctic The Antarctic Lone |
geographic_facet |
Antarctic The Antarctic Lone |
genre |
Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis Balaenoptera physalus Fin whale Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca South Atlantic Ocean Killer whale |
genre_facet |
Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis Balaenoptera physalus Fin whale Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca South Atlantic Ocean Killer whale |
op_source |
Brazilian Journal of Biology, Vol 74, Iss 1, Pp 137-144 |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842014000100017&lng=en&tlng=en https://doaj.org/toc/1678-4375 1678-4375 doi:10.1590/1519-6984.21812 https://doaj.org/article/c0acc2ca21b74d7791607e903994c0e6 |
op_doi |
https://doi.org/10.1590/1519-6984.21812 |
container_title |
Brazilian Journal of Biology |
container_volume |
74 |
container_issue |
1 |
container_start_page |
137 |
op_container_end_page |
144 |
_version_ |
1766255297783922688 |