Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean
With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare for the next fasting period. Valuable insights into habitat use and diving beha...
Published in: | PLoS ONE |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/11250/109317 https://doi.org/10.1371/journal.pone.0080438 |
id |
ftimr:oai:imr.brage.unit.no:11250/109317 |
---|---|
record_format |
openpolar |
spelling |
ftimr:oai:imr.brage.unit.no:11250/109317 2023-05-15T15:59:53+02:00 Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean Andersen, Julie M. Skern-Mauritzen, Mette Boehme, Lars Wiersma, Yolanda F. Rosing-Asvid, Aqqalu Hammill, Mike O. Stenson, Garry B. 2013-11-25 application/pdf http://hdl.handle.net/11250/109317 https://doi.org/10.1371/journal.pone.0080438 eng eng Public Library of Science Andersen JM, Skern-Mauritzen M, Boehme L, Wiersma YF, Rosing-Asvid A, et al. (2013) Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean. PLoS ONE 8(11): e80438. urn:issn:1932-6203 http://hdl.handle.net/11250/109317 https://doi.org/10.1371/journal.pone.0080438 13 p. 8 PLoS ONE 11 VDP::Agriculture and fishery disciplines: 900::Clinical veterinary science disciplines: 950::Reproduction: 951 Journal article Peer reviewed 2013 ftimr https://doi.org/10.1371/journal.pone.0080438 2021-09-23T20:16:04Z With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare for the next fasting period. Valuable insights into habitat use and diving behaviour during these periods have been obtained by attaching Satellite Relay Data Loggers (SRDLs) to 51 Northwest (NW) Atlantic hooded seals (33 females and 18 males) during icebound fasting periods (200422008). Using General Additive Models (GAMs) we describe habitat use in terms of First Passage Time (FPT) and analyse how bathymetry, seasonality and FPT influence the hooded seals' diving behaviour described by maximum dive depth, dive duration and surface duration. Adult NW Atlantic hooded seals exhibit a change in diving activity in areas where they spend >20 h by increasing maximum dive depth, dive duration and surface duration, indicating a restricted search behaviour. We found that male and female hooded seals are spatially segregated and that diving behaviour varies between sexes in relation to habitat properties and seasonality. Migration periods are described by increased dive duration for both sexes with a peak in May, October and January. Males demonstrated an increase in dive depth and dive duration towards May (post-breeding/pre-moult) and August-October (post-moult/pre-breeding) but did not show any pronounced increase in surface duration. Females dived deepest and had the highest surface duration between December and January (post-moult/pre-breeding). Our results suggest that the smaller females may have a greater need to recover from dives than that of the larger males. Horizontal segregation could have evolved as a result of a resource partitioning strategy to avoid sexual competition or that the energy requirements of males and females are different due to different energy expenditure during fasting periods. Article in Journal/Newspaper Cystophora cristata Northwest Atlantic Institute for Marine Research: Brage IMR PLoS ONE 8 11 e80438 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Clinical veterinary science disciplines: 950::Reproduction: 951 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Clinical veterinary science disciplines: 950::Reproduction: 951 Andersen, Julie M. Skern-Mauritzen, Mette Boehme, Lars Wiersma, Yolanda F. Rosing-Asvid, Aqqalu Hammill, Mike O. Stenson, Garry B. Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Clinical veterinary science disciplines: 950::Reproduction: 951 |
description |
With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare for the next fasting period. Valuable insights into habitat use and diving behaviour during these periods have been obtained by attaching Satellite Relay Data Loggers (SRDLs) to 51 Northwest (NW) Atlantic hooded seals (33 females and 18 males) during icebound fasting periods (200422008). Using General Additive Models (GAMs) we describe habitat use in terms of First Passage Time (FPT) and analyse how bathymetry, seasonality and FPT influence the hooded seals' diving behaviour described by maximum dive depth, dive duration and surface duration. Adult NW Atlantic hooded seals exhibit a change in diving activity in areas where they spend >20 h by increasing maximum dive depth, dive duration and surface duration, indicating a restricted search behaviour. We found that male and female hooded seals are spatially segregated and that diving behaviour varies between sexes in relation to habitat properties and seasonality. Migration periods are described by increased dive duration for both sexes with a peak in May, October and January. Males demonstrated an increase in dive depth and dive duration towards May (post-breeding/pre-moult) and August-October (post-moult/pre-breeding) but did not show any pronounced increase in surface duration. Females dived deepest and had the highest surface duration between December and January (post-moult/pre-breeding). Our results suggest that the smaller females may have a greater need to recover from dives than that of the larger males. Horizontal segregation could have evolved as a result of a resource partitioning strategy to avoid sexual competition or that the energy requirements of males and females are different due to different energy expenditure during fasting periods. |
format |
Article in Journal/Newspaper |
author |
Andersen, Julie M. Skern-Mauritzen, Mette Boehme, Lars Wiersma, Yolanda F. Rosing-Asvid, Aqqalu Hammill, Mike O. Stenson, Garry B. |
author_facet |
Andersen, Julie M. Skern-Mauritzen, Mette Boehme, Lars Wiersma, Yolanda F. Rosing-Asvid, Aqqalu Hammill, Mike O. Stenson, Garry B. |
author_sort |
Andersen, Julie M. |
title |
Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
title_short |
Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
title_full |
Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
title_fullStr |
Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
title_full_unstemmed |
Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean |
title_sort |
investigating annual diving behaviour by hooded seals (cystophora cristata) within the northwest atlantic ocean |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/109317 https://doi.org/10.1371/journal.pone.0080438 |
genre |
Cystophora cristata Northwest Atlantic |
genre_facet |
Cystophora cristata Northwest Atlantic |
op_source |
13 p. 8 PLoS ONE 11 |
op_relation |
Andersen JM, Skern-Mauritzen M, Boehme L, Wiersma YF, Rosing-Asvid A, et al. (2013) Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean. PLoS ONE 8(11): e80438. urn:issn:1932-6203 http://hdl.handle.net/11250/109317 https://doi.org/10.1371/journal.pone.0080438 |
op_doi |
https://doi.org/10.1371/journal.pone.0080438 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
11 |
container_start_page |
e80438 |
_version_ |
1766395775706726400 |