Risso's dolphins alter daily resting pattern in response to whale watching at the Azores
P>Behavioral responses of Risso's dolphins (Grampus griseus) to whale watching vessels were studied off Pico Island, Azores. Dolphin behavior was studied from a land-based lookout, enabling observations of groups in the absence and presence of vessels. The number of whale watching vessels sh...
Published in: | Marine Mammal Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://hdl.handle.net/11370/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://research.rug.nl/en/publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://doi.org/10.1111/j.1748-7692.2010.00398.x |
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ftunigroningenpu:oai:pure.rug.nl:publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 2024-06-02T08:12:48+00:00 Risso's dolphins alter daily resting pattern in response to whale watching at the Azores Visser, Fleur Hartman, Karin L. Rood, Ente J. J. Hendriks, Arthur J. E. Zult, Daan B. Wolff, Wim J. Huisman, Jef Pierce, Graham J. 2011-04 https://hdl.handle.net/11370/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://research.rug.nl/en/publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://doi.org/10.1111/j.1748-7692.2010.00398.x eng eng https://research.rug.nl/en/publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 info:eu-repo/semantics/closedAccess Visser , F , Hartman , K L , Rood , E J J , Hendriks , A J E , Zult , D B , Wolff , W J , Huisman , J & Pierce , G J 2011 , ' Risso's dolphins alter daily resting pattern in response to whale watching at the Azores ' , Marine Mammal Science , vol. 27 , no. 2 , pp. 366-381 . https://doi.org/10.1111/j.1748-7692.2010.00398.x Risso's dolphin Grampus griseus whale watching Azores behavioral budget land observations resting behavior BOTTLE-NOSED DOLPHINS ORCINUS-ORCA SAMPLING METHODS TURSIOPS SPP NEW-ZEALAND TOUR BOATS BEHAVIOR DISTURBANCE FLORIDA MODEL article 2011 ftunigroningenpu https://doi.org/10.1111/j.1748-7692.2010.00398.x 2024-05-07T18:49:19Z P>Behavioral responses of Risso's dolphins (Grampus griseus) to whale watching vessels were studied off Pico Island, Azores. Dolphin behavior was studied from a land-based lookout, enabling observations of groups in the absence and presence of vessels. The number of whale watching vessels showed a clear seasonal pattern, dividing the whale watching period into a low season and a high season. During the low season, Risso's dolphins rested mainly in the morning and afternoon. During the high season, Risso's dolphins rested less and did so mainly at noon, when the number of active vessels was lowest. Data analysis using a generalized additive mixed model indicated that this change in resting behavior was associated with vessel abundance. When more than five vessels were present, Risso's dolphins spent significantly less time resting and socializing. During the high season, this vessel abundance was exceeded during 20% of observation days. While we cannot be sure that the observed changes in behavior have fitness consequences for Risso's dolphins, reduced resting and socializing rates can have negative impacts on the build-up of energy reserves and on reproductive success. We suggest the adoption of precautionary management measures to regulate the timing and intensity of whale watching activities. Article in Journal/Newspaper Orca Orcinus orca University of Groningen research database Lookout ENVELOPE(77.955,77.955,-68.605,-68.605) New Zealand Marine Mammal Science 27 2 366 381 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
Risso's dolphin Grampus griseus whale watching Azores behavioral budget land observations resting behavior BOTTLE-NOSED DOLPHINS ORCINUS-ORCA SAMPLING METHODS TURSIOPS SPP NEW-ZEALAND TOUR BOATS BEHAVIOR DISTURBANCE FLORIDA MODEL |
spellingShingle |
Risso's dolphin Grampus griseus whale watching Azores behavioral budget land observations resting behavior BOTTLE-NOSED DOLPHINS ORCINUS-ORCA SAMPLING METHODS TURSIOPS SPP NEW-ZEALAND TOUR BOATS BEHAVIOR DISTURBANCE FLORIDA MODEL Visser, Fleur Hartman, Karin L. Rood, Ente J. J. Hendriks, Arthur J. E. Zult, Daan B. Wolff, Wim J. Huisman, Jef Pierce, Graham J. Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
topic_facet |
Risso's dolphin Grampus griseus whale watching Azores behavioral budget land observations resting behavior BOTTLE-NOSED DOLPHINS ORCINUS-ORCA SAMPLING METHODS TURSIOPS SPP NEW-ZEALAND TOUR BOATS BEHAVIOR DISTURBANCE FLORIDA MODEL |
description |
P>Behavioral responses of Risso's dolphins (Grampus griseus) to whale watching vessels were studied off Pico Island, Azores. Dolphin behavior was studied from a land-based lookout, enabling observations of groups in the absence and presence of vessels. The number of whale watching vessels showed a clear seasonal pattern, dividing the whale watching period into a low season and a high season. During the low season, Risso's dolphins rested mainly in the morning and afternoon. During the high season, Risso's dolphins rested less and did so mainly at noon, when the number of active vessels was lowest. Data analysis using a generalized additive mixed model indicated that this change in resting behavior was associated with vessel abundance. When more than five vessels were present, Risso's dolphins spent significantly less time resting and socializing. During the high season, this vessel abundance was exceeded during 20% of observation days. While we cannot be sure that the observed changes in behavior have fitness consequences for Risso's dolphins, reduced resting and socializing rates can have negative impacts on the build-up of energy reserves and on reproductive success. We suggest the adoption of precautionary management measures to regulate the timing and intensity of whale watching activities. |
format |
Article in Journal/Newspaper |
author |
Visser, Fleur Hartman, Karin L. Rood, Ente J. J. Hendriks, Arthur J. E. Zult, Daan B. Wolff, Wim J. Huisman, Jef Pierce, Graham J. |
author_facet |
Visser, Fleur Hartman, Karin L. Rood, Ente J. J. Hendriks, Arthur J. E. Zult, Daan B. Wolff, Wim J. Huisman, Jef Pierce, Graham J. |
author_sort |
Visser, Fleur |
title |
Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
title_short |
Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
title_full |
Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
title_fullStr |
Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
title_full_unstemmed |
Risso's dolphins alter daily resting pattern in response to whale watching at the Azores |
title_sort |
risso's dolphins alter daily resting pattern in response to whale watching at the azores |
publishDate |
2011 |
url |
https://hdl.handle.net/11370/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://research.rug.nl/en/publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 https://doi.org/10.1111/j.1748-7692.2010.00398.x |
long_lat |
ENVELOPE(77.955,77.955,-68.605,-68.605) |
geographic |
Lookout New Zealand |
geographic_facet |
Lookout New Zealand |
genre |
Orca Orcinus orca |
genre_facet |
Orca Orcinus orca |
op_source |
Visser , F , Hartman , K L , Rood , E J J , Hendriks , A J E , Zult , D B , Wolff , W J , Huisman , J & Pierce , G J 2011 , ' Risso's dolphins alter daily resting pattern in response to whale watching at the Azores ' , Marine Mammal Science , vol. 27 , no. 2 , pp. 366-381 . https://doi.org/10.1111/j.1748-7692.2010.00398.x |
op_relation |
https://research.rug.nl/en/publications/a7efd9a6-cc0a-41d3-9d66-b3c85c1ebe76 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/j.1748-7692.2010.00398.x |
container_title |
Marine Mammal Science |
container_volume |
27 |
container_issue |
2 |
container_start_page |
366 |
op_container_end_page |
381 |
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1800759363712843776 |