Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground
The Abrolhos Bank (off the State of Bahia, northeastern Brazil) is the most important breeding and calving ground for humpback whales, Megaptera novaeangliae, in the western South Atlantic. The area is shallow with a mean depth of 30m and a group of five islands (the Abrolhos Archipelago) is located...
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ftunivfurg:oai:repositorio.furg.br:1/1106 2024-10-06T13:49:22+00:00 Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground Martins, Cristiane Cavalcante Albuquerque Morete, Maria Emilia Coitinho, Márcia Helena Engel Freitas, Ana Cristina Secchi, Eduardo Resende Kinas, Paul Gerhard 2001 application/pdf http://repositorio.furg.br/handle/1/1106 eng eng MARTINS, C. C. A. et al. Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground. Memoirs of the Queensland Museum, Brisbane, v. 47, n. 2, p. 563-570, 2001. Disponível em: <http://mardecetaceos.net/media_files/download/Martinsetal2001Aspects.pdf>. Acesso em: 11 out. 2011. http://repositorio.furg.br/handle/1/1106 open access Megaptera novaeangliae Habitat use Abrolhos Bank Brazil article 2001 ftunivfurg 2024-09-12T03:26:33Z The Abrolhos Bank (off the State of Bahia, northeastern Brazil) is the most important breeding and calving ground for humpback whales, Megaptera novaeangliae, in the western South Atlantic. The area is shallow with a mean depth of 30m and a group of five islands (the Abrolhos Archipelago) is located in the northern portion of the Bank. Data collected from 1992 to 1998 were analysed to identify possible different habitat use patterns by different humpback whale group types. An analysis of variance found differences in the mean water depths where different group types were recorded: single whales, 18.9m (se = 0.505); pairs, 18.6m (se = 0.386); competitive groups, 19.1m (se = 0.573); mother-calf pairs, 15.8m (se = 0.373); mother-calf-principal escort, 14.9m (se = 0.489); and competitive group with mother-calf pair, 16.4m (se = 0.889). With the exception of competitive groups, those containing calves (mother-calf alone or mother-calf-principal escort) occurred in significantly shallower water than non-calf groups (Tukey test, p<0.05). In addition, groups containing calves were found significantly more often nearer the Archipelago (within 4 nautical miles) than other groups (two-sample Kolmogorov-Smirnov test, D = 0.139; 2 = 18.516, p<0.05). Accordingly, a spatially stratified management scheme is recommended in order to protect mother-calf pairs from possible harassment by whale watching operations in the area. Article in Journal/Newspaper Humpback Whale Megaptera novaeangliae RI FURG (Repositório da Universidade Federal do Rio Grande) Five Islands ENVELOPE(-69.415,-69.415,60.184,60.184) |
institution |
Open Polar |
collection |
RI FURG (Repositório da Universidade Federal do Rio Grande) |
op_collection_id |
ftunivfurg |
language |
English |
topic |
Megaptera novaeangliae Habitat use Abrolhos Bank Brazil |
spellingShingle |
Megaptera novaeangliae Habitat use Abrolhos Bank Brazil Martins, Cristiane Cavalcante Albuquerque Morete, Maria Emilia Coitinho, Márcia Helena Engel Freitas, Ana Cristina Secchi, Eduardo Resende Kinas, Paul Gerhard Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
topic_facet |
Megaptera novaeangliae Habitat use Abrolhos Bank Brazil |
description |
The Abrolhos Bank (off the State of Bahia, northeastern Brazil) is the most important breeding and calving ground for humpback whales, Megaptera novaeangliae, in the western South Atlantic. The area is shallow with a mean depth of 30m and a group of five islands (the Abrolhos Archipelago) is located in the northern portion of the Bank. Data collected from 1992 to 1998 were analysed to identify possible different habitat use patterns by different humpback whale group types. An analysis of variance found differences in the mean water depths where different group types were recorded: single whales, 18.9m (se = 0.505); pairs, 18.6m (se = 0.386); competitive groups, 19.1m (se = 0.573); mother-calf pairs, 15.8m (se = 0.373); mother-calf-principal escort, 14.9m (se = 0.489); and competitive group with mother-calf pair, 16.4m (se = 0.889). With the exception of competitive groups, those containing calves (mother-calf alone or mother-calf-principal escort) occurred in significantly shallower water than non-calf groups (Tukey test, p<0.05). In addition, groups containing calves were found significantly more often nearer the Archipelago (within 4 nautical miles) than other groups (two-sample Kolmogorov-Smirnov test, D = 0.139; 2 = 18.516, p<0.05). Accordingly, a spatially stratified management scheme is recommended in order to protect mother-calf pairs from possible harassment by whale watching operations in the area. |
format |
Article in Journal/Newspaper |
author |
Martins, Cristiane Cavalcante Albuquerque Morete, Maria Emilia Coitinho, Márcia Helena Engel Freitas, Ana Cristina Secchi, Eduardo Resende Kinas, Paul Gerhard |
author_facet |
Martins, Cristiane Cavalcante Albuquerque Morete, Maria Emilia Coitinho, Márcia Helena Engel Freitas, Ana Cristina Secchi, Eduardo Resende Kinas, Paul Gerhard |
author_sort |
Martins, Cristiane Cavalcante Albuquerque |
title |
Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
title_short |
Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
title_full |
Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
title_fullStr |
Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
title_full_unstemmed |
Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground |
title_sort |
aspects of habitat use patterns of humpback whales in the abrolhos bank, brazil, breeding ground |
publishDate |
2001 |
url |
http://repositorio.furg.br/handle/1/1106 |
long_lat |
ENVELOPE(-69.415,-69.415,60.184,60.184) |
geographic |
Five Islands |
geographic_facet |
Five Islands |
genre |
Humpback Whale Megaptera novaeangliae |
genre_facet |
Humpback Whale Megaptera novaeangliae |
op_relation |
MARTINS, C. C. A. et al. Aspects of habitat use patterns of humpback whales in the Abrolhos bank, Brazil, breeding ground. Memoirs of the Queensland Museum, Brisbane, v. 47, n. 2, p. 563-570, 2001. Disponível em: <http://mardecetaceos.net/media_files/download/Martinsetal2001Aspects.pdf>. Acesso em: 11 out. 2011. http://repositorio.furg.br/handle/1/1106 |
op_rights |
open access |
_version_ |
1812177441436729344 |