Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground

Detalhes bibliográficos
Autor(a) principal: Gonçalves,Maria Isabel Carvalho
Data de Publicação: 2018
Outros Autores: Sousa-Lima,Renata Santoro de, Teixeira,Niel Nascimento, Carvalho,Gustavo Henrique, Danilewicz,Daniel, Baumgarten,Júlio Ernesto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Biota Neotropica
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400210
Resumo: Abstract: The population of humpback whales from breeding stock A is increasing, and little is known about the routes used by humpbacks that move north of the main calving area of Brazil, the Abrolhos Bank. The aim of this study was to describe the movements of humpback whales in a reoccupation wintering area (Serra Grande, Bahia state, Brazil) based on land-based surveys to test if movement patterns change during the season and between years, due to group composition, behavioral state, and distance to the coast. The mean leg speed of the groups sighted was 6.88 (±2.92) km/h, and leg speed was positively correlated with distance to the coast. There was an increase in leg speed and distance to the coast with increasing number of escorts in the groups with calves. The mean linearity value for group trajectory was 0.81 (±0.19) and the mean reorientation rate was 25.72 (±19.09) º/min. We observed a predominance of trajectories heading south throughout the study. Groups exhibiting more erratic movements early in the season, and groups moving south showed more linear trajectories than groups moving north, indicating the beginning of their migration back to the feeding grounds. Energy conserving strategies and social context affect the movements of humpback whales in Serra Grande, resulting in the observed patterns of the reoccupation of available and suitable habitat north of Abrolhos. Thereby, special attention should be given managing activities with the potential to disturb or displace whales using the region to calve and breed.
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spelling Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding groundcalving areadistance to the coastland-based stationlinearityspeedAbstract: The population of humpback whales from breeding stock A is increasing, and little is known about the routes used by humpbacks that move north of the main calving area of Brazil, the Abrolhos Bank. The aim of this study was to describe the movements of humpback whales in a reoccupation wintering area (Serra Grande, Bahia state, Brazil) based on land-based surveys to test if movement patterns change during the season and between years, due to group composition, behavioral state, and distance to the coast. The mean leg speed of the groups sighted was 6.88 (±2.92) km/h, and leg speed was positively correlated with distance to the coast. There was an increase in leg speed and distance to the coast with increasing number of escorts in the groups with calves. The mean linearity value for group trajectory was 0.81 (±0.19) and the mean reorientation rate was 25.72 (±19.09) º/min. We observed a predominance of trajectories heading south throughout the study. Groups exhibiting more erratic movements early in the season, and groups moving south showed more linear trajectories than groups moving north, indicating the beginning of their migration back to the feeding grounds. Energy conserving strategies and social context affect the movements of humpback whales in Serra Grande, resulting in the observed patterns of the reoccupation of available and suitable habitat north of Abrolhos. Thereby, special attention should be given managing activities with the potential to disturb or displace whales using the region to calve and breed.Instituto Virtual da Biodiversidade | BIOTA - FAPESP2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400210Biota Neotropica v.18 n.4 2018reponame:Biota Neotropicainstname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)instacron:BIOTA - FAPESP10.1590/1676-0611-bn-2018-0567info:eu-repo/semantics/openAccessGonçalves,Maria Isabel CarvalhoSousa-Lima,Renata Santoro deTeixeira,Niel NascimentoCarvalho,Gustavo HenriqueDanilewicz,DanielBaumgarten,Júlio Ernestoeng2018-10-05T00:00:00Zoai:scielo:S1676-06032018000400210Revistahttps://www.biotaneotropica.org.br/v20n1/pt/https://old.scielo.br/oai/scielo-oai.php||juliosa@unifap.br1676-06111676-0611opendoar:2018-10-05T00:00Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)false
dc.title.none.fl_str_mv Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
title Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
spellingShingle Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
Gonçalves,Maria Isabel Carvalho
calving area
distance to the coast
land-based station
linearity
speed
title_short Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
title_full Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
title_fullStr Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
title_full_unstemmed Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
title_sort Movement patterns of humpback whales (Megaptera novaeangliae) reoccupying a Brazilian breeding ground
author Gonçalves,Maria Isabel Carvalho
author_facet Gonçalves,Maria Isabel Carvalho
Sousa-Lima,Renata Santoro de
Teixeira,Niel Nascimento
Carvalho,Gustavo Henrique
Danilewicz,Daniel
Baumgarten,Júlio Ernesto
author_role author
author2 Sousa-Lima,Renata Santoro de
Teixeira,Niel Nascimento
Carvalho,Gustavo Henrique
Danilewicz,Daniel
Baumgarten,Júlio Ernesto
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Gonçalves,Maria Isabel Carvalho
Sousa-Lima,Renata Santoro de
Teixeira,Niel Nascimento
Carvalho,Gustavo Henrique
Danilewicz,Daniel
Baumgarten,Júlio Ernesto
dc.subject.por.fl_str_mv calving area
distance to the coast
land-based station
linearity
speed
topic calving area
distance to the coast
land-based station
linearity
speed
description Abstract: The population of humpback whales from breeding stock A is increasing, and little is known about the routes used by humpbacks that move north of the main calving area of Brazil, the Abrolhos Bank. The aim of this study was to describe the movements of humpback whales in a reoccupation wintering area (Serra Grande, Bahia state, Brazil) based on land-based surveys to test if movement patterns change during the season and between years, due to group composition, behavioral state, and distance to the coast. The mean leg speed of the groups sighted was 6.88 (±2.92) km/h, and leg speed was positively correlated with distance to the coast. There was an increase in leg speed and distance to the coast with increasing number of escorts in the groups with calves. The mean linearity value for group trajectory was 0.81 (±0.19) and the mean reorientation rate was 25.72 (±19.09) º/min. We observed a predominance of trajectories heading south throughout the study. Groups exhibiting more erratic movements early in the season, and groups moving south showed more linear trajectories than groups moving north, indicating the beginning of their migration back to the feeding grounds. Energy conserving strategies and social context affect the movements of humpback whales in Serra Grande, resulting in the observed patterns of the reoccupation of available and suitable habitat north of Abrolhos. Thereby, special attention should be given managing activities with the potential to disturb or displace whales using the region to calve and breed.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
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=S1676-06032018000400210
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400210
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1676-0611-bn-2018-0567
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 Virtual da Biodiversidade | BIOTA - FAPESP
publisher.none.fl_str_mv Instituto Virtual da Biodiversidade | BIOTA - FAPESP
dc.source.none.fl_str_mv Biota Neotropica v.18 n.4 2018
reponame:Biota Neotropica
instname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
instacron:BIOTA - FAPESP
instname_str Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
instacron_str BIOTA - FAPESP
institution BIOTA - FAPESP
reponame_str Biota Neotropica
collection Biota Neotropica
repository.name.fl_str_mv Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
repository.mail.fl_str_mv ||juliosa@unifap.br
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