The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/108384 https://doi.org/10.1038/s41598-017-01312-3 |
Resumo: | The lunar cycle is believed to strongly influence the vertical distribution of many oceanic taxa, with implications for the foraging behaviour of nocturnal marine predators. Most studies to date testing lunar effects on foraging have focused on predator activity at-sea, with some birds and marine mammals demonstrating contrasting behavioural patterns, depending on the lunar-phase. However, to date no study has focused on how the lunar cycle might actually affect predator-prey interactions in the upper layers of the ocean. Here, we tested whether the diet of the predominantly nocturnal pelagic predator, the Bulwer's petrel (Bulweria bulwerii) would change throughout the lunar cycle, using molecular analysis to augment detection and taxonomic resolution of prey collected from stomach-contents. We found no evidence of dietary shifts in species composition or diversity, with Bulwer's petrel always consuming a wide range of mesopelagic species. Other co-variables potentially affecting light availability at-sea, such as percentage of cloud cover, did not confound our results. Moreover, many of the species found are thought not to reach the sea-surface. Our findings reveal that nocturnal predators are probably more specialized than previously assumed, irrespective of ambient-light, but also reveal deficiencies in our current understanding of species vertical distribution and predation-dynamics at-sea. |
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The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycleAnimalsOceans and SeasBirdsDietMoonPredatory BehaviorThe lunar cycle is believed to strongly influence the vertical distribution of many oceanic taxa, with implications for the foraging behaviour of nocturnal marine predators. Most studies to date testing lunar effects on foraging have focused on predator activity at-sea, with some birds and marine mammals demonstrating contrasting behavioural patterns, depending on the lunar-phase. However, to date no study has focused on how the lunar cycle might actually affect predator-prey interactions in the upper layers of the ocean. Here, we tested whether the diet of the predominantly nocturnal pelagic predator, the Bulwer's petrel (Bulweria bulwerii) would change throughout the lunar cycle, using molecular analysis to augment detection and taxonomic resolution of prey collected from stomach-contents. We found no evidence of dietary shifts in species composition or diversity, with Bulwer's petrel always consuming a wide range of mesopelagic species. Other co-variables potentially affecting light availability at-sea, such as percentage of cloud cover, did not confound our results. Moreover, many of the species found are thought not to reach the sea-surface. Our findings reveal that nocturnal predators are probably more specialized than previously assumed, irrespective of ambient-light, but also reveal deficiencies in our current understanding of species vertical distribution and predation-dynamics at-sea.Springer Nature2017-05-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/108384http://hdl.handle.net/10316/108384https://doi.org/10.1038/s41598-017-01312-3eng2045-2322Waap, S.Symondson, W. O. C.Granadeiro, J. P.Alonso, H.Serra-Gonçalves, C.Dias, M. P.Catry, P.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-28T10:06:20Zoai:estudogeral.uc.pt:10316/108384Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:24:41.111615Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
title |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
spellingShingle |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle Waap, S. Animals Oceans and Seas Birds Diet Moon Predatory Behavior |
title_short |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
title_full |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
title_fullStr |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
title_full_unstemmed |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
title_sort |
The diet of a nocturnal pelagic predator, the Bulwer's petrel, across the lunar cycle |
author |
Waap, S. |
author_facet |
Waap, S. Symondson, W. O. C. Granadeiro, J. P. Alonso, H. Serra-Gonçalves, C. Dias, M. P. Catry, P. |
author_role |
author |
author2 |
Symondson, W. O. C. Granadeiro, J. P. Alonso, H. Serra-Gonçalves, C. Dias, M. P. Catry, P. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Waap, S. Symondson, W. O. C. Granadeiro, J. P. Alonso, H. Serra-Gonçalves, C. Dias, M. P. Catry, P. |
dc.subject.por.fl_str_mv |
Animals Oceans and Seas Birds Diet Moon Predatory Behavior |
topic |
Animals Oceans and Seas Birds Diet Moon Predatory Behavior |
description |
The lunar cycle is believed to strongly influence the vertical distribution of many oceanic taxa, with implications for the foraging behaviour of nocturnal marine predators. Most studies to date testing lunar effects on foraging have focused on predator activity at-sea, with some birds and marine mammals demonstrating contrasting behavioural patterns, depending on the lunar-phase. However, to date no study has focused on how the lunar cycle might actually affect predator-prey interactions in the upper layers of the ocean. Here, we tested whether the diet of the predominantly nocturnal pelagic predator, the Bulwer's petrel (Bulweria bulwerii) would change throughout the lunar cycle, using molecular analysis to augment detection and taxonomic resolution of prey collected from stomach-contents. We found no evidence of dietary shifts in species composition or diversity, with Bulwer's petrel always consuming a wide range of mesopelagic species. Other co-variables potentially affecting light availability at-sea, such as percentage of cloud cover, did not confound our results. Moreover, many of the species found are thought not to reach the sea-surface. Our findings reveal that nocturnal predators are probably more specialized than previously assumed, irrespective of ambient-light, but also reveal deficiencies in our current understanding of species vertical distribution and predation-dynamics at-sea. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-05-03 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/108384 http://hdl.handle.net/10316/108384 https://doi.org/10.1038/s41598-017-01312-3 |
url |
http://hdl.handle.net/10316/108384 https://doi.org/10.1038/s41598-017-01312-3 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2045-2322 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Springer Nature |
publisher.none.fl_str_mv |
Springer Nature |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134130629246976 |