Seabird attacks contribute to calf mortality in a whale population

Autores
Piotto, María; Barberá, Iván; Sironi, Mariano; Rowntree, Victoria J.; Uhart, Marcela María; Agrelo, Macarena; Fernandez Ajo, Alejandro Apolo; Seger, Jon; Marón, Carina Flavia
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Reports of seabirds attacking marine mammals have become frequent in the 2000s. Southern right whales Eubalaena australis off Península Valdés (PV), Argentina, have suffered the effects of micropredation by kelp gulls Larus dominicanus since at least the 1970s. During 2003-2013, this population experienced 9 yr of unprecedented high calf mortality. Using a 25 yr dataset (1995-2019) of focal follows of gull-whale interactions, we studied long-term changes in gull attack intensity (attacks h-1) and frequency, and explored whether they influenced calf mortality. We also asked whether calf mortality was affected by prey density at maternal feeding grounds during gestation. Applying Bayesian models, we found that the intensity and frequency of attacks increased significantly from 1995 to the 2000s, and that in 2004-2019, calves received 2.85 times as many attacks as did mothers. Moreover, attacks significantly contributed to increase the probability of calves dying, such that a year with average overall harassment had 2.26 times the mortality of a hypothetical year with no attacks. In years of high intensity and frequency of attacks, many older calves died near the end of the season, probably reflecting the cumulative effect of gull harassment on calf health. However, calf mortality was not affected by prey density, and extremely high mortality was not related to extremely high frequency or intensity of attacks, indicating that deaths are also influenced by other unidentified factors. These findings imply that chronic micropredation contributed to the unprecedented high calf mortality observed in PV and that other marine mammal populations experiencing seabird attacks could be threatened.
Fil: Piotto, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina. Instituto de Conservacion de Ballenas;
Fil: Barberá, Iván. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Sironi, Mariano. Instituto de Conservacion de Ballenas; . Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; Argentina. Southern Right Whale Health Monitoring Program; Argentina
Fil: Rowntree, Victoria J.. University Of Utah. Department Of Biology; Estados Unidos. Ocean Alliance; Estados Unidos
Fil: Uhart, Marcela María. University of California at Davis; Estados Unidos. Southern Right Whale Health Monitoring Program; Argentina
Fil: Agrelo, Macarena. Instituto de Conservacion de Ballenas; . Universidade Federal de Santa Catarina; Brasil
Fil: Fernandez Ajo, Alejandro Apolo. Instituto de Conservacion de Ballenas; . State University of Oregon; Estados Unidos
Fil: Seger, Jon. University Of Utah. Department Of Biology; Estados Unidos
Fil: Marón, Carina Flavia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto de Conservacion de Ballenas; . Universidad Nacional de Cordoba. Facultad de Cs.exactas Fisicas y Naturales. Departamento de Biologia. Cat.de Ecologia General; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; Argentina
Materia
Calf deaths
Micropredation
Kelp gulls
Right whales
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/260588
Acceder
id CONICETDig_2ce8994b03ec8d98ee2215eb4e0bcb54
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Seabird attacks contribute to calf mortality in a whale populationPiotto, MaríaBarberá, IvánSironi, MarianoRowntree, Victoria J.Uhart, Marcela MaríaAgrelo, MacarenaFernandez Ajo, Alejandro ApoloSeger, JonMarón, Carina FlaviaCalf deathsMicropredationKelp gullsRight whaleshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Reports of seabirds attacking marine mammals have become frequent in the 2000s. Southern right whales Eubalaena australis off Península Valdés (PV), Argentina, have suffered the effects of micropredation by kelp gulls Larus dominicanus since at least the 1970s. During 2003-2013, this population experienced 9 yr of unprecedented high calf mortality. Using a 25 yr dataset (1995-2019) of focal follows of gull-whale interactions, we studied long-term changes in gull attack intensity (attacks h-1) and frequency, and explored whether they influenced calf mortality. We also asked whether calf mortality was affected by prey density at maternal feeding grounds during gestation. Applying Bayesian models, we found that the intensity and frequency of attacks increased significantly from 1995 to the 2000s, and that in 2004-2019, calves received 2.85 times as many attacks as did mothers. Moreover, attacks significantly contributed to increase the probability of calves dying, such that a year with average overall harassment had 2.26 times the mortality of a hypothetical year with no attacks. In years of high intensity and frequency of attacks, many older calves died near the end of the season, probably reflecting the cumulative effect of gull harassment on calf health. However, calf mortality was not affected by prey density, and extremely high mortality was not related to extremely high frequency or intensity of attacks, indicating that deaths are also influenced by other unidentified factors. These findings imply that chronic micropredation contributed to the unprecedented high calf mortality observed in PV and that other marine mammal populations experiencing seabird attacks could be threatened.Fil: Piotto, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina. Instituto de Conservacion de Ballenas;Fil: Barberá, Iván. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Sironi, Mariano. Instituto de Conservacion de Ballenas; . Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; Argentina. Southern Right Whale Health Monitoring Program; ArgentinaFil: Rowntree, Victoria J.. University Of Utah. Department Of Biology; Estados Unidos. Ocean Alliance; Estados UnidosFil: Uhart, Marcela María. University of California at Davis; Estados Unidos. Southern Right Whale Health Monitoring Program; ArgentinaFil: Agrelo, Macarena. Instituto de Conservacion de Ballenas; . Universidade Federal de Santa Catarina; BrasilFil: Fernandez Ajo, Alejandro Apolo. Instituto de Conservacion de Ballenas; . State University of Oregon; Estados UnidosFil: Seger, Jon. University Of Utah. Department Of Biology; Estados UnidosFil: Marón, Carina Flavia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto de Conservacion de Ballenas; . Universidad Nacional de Cordoba. Facultad de Cs.exactas Fisicas y Naturales. Departamento de Biologia. Cat.de Ecologia General; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; ArgentinaInter-Research2024-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/260588Piotto, María; Barberá, Iván; Sironi, Mariano; Rowntree, Victoria J.; Uhart, Marcela María; et al.; Seabird attacks contribute to calf mortality in a whale population; Inter-Research; Marine Ecology Progress Series; 746; 10-2024; 1-160171-8630CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v746/p1-16/info:eu-repo/semantics/altIdentifier/doi/10.3354/meps14689info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:43Zoai:ri.conicet.gov.ar:11336/260588instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:43.426CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Seabird attacks contribute to calf mortality in a whale population
title Seabird attacks contribute to calf mortality in a whale population
spellingShingle Seabird attacks contribute to calf mortality in a whale population
Piotto, María
Calf deaths
Micropredation
Kelp gulls
Right whales
title_short Seabird attacks contribute to calf mortality in a whale population
title_full Seabird attacks contribute to calf mortality in a whale population
title_fullStr Seabird attacks contribute to calf mortality in a whale population
title_full_unstemmed Seabird attacks contribute to calf mortality in a whale population
title_sort Seabird attacks contribute to calf mortality in a whale population
dc.creator.none.fl_str_mv Piotto, María
Barberá, Iván
Sironi, Mariano
Rowntree, Victoria J.
Uhart, Marcela María
Agrelo, Macarena
Fernandez Ajo, Alejandro Apolo
Seger, Jon
Marón, Carina Flavia
author Piotto, María
author_facet Piotto, María
Barberá, Iván
Sironi, Mariano
Rowntree, Victoria J.
Uhart, Marcela María
Agrelo, Macarena
Fernandez Ajo, Alejandro Apolo
Seger, Jon
Marón, Carina Flavia
author_role author
author2 Barberá, Iván
Sironi, Mariano
Rowntree, Victoria J.
Uhart, Marcela María
Agrelo, Macarena
Fernandez Ajo, Alejandro Apolo
Seger, Jon
Marón, Carina Flavia
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Calf deaths
Micropredation
Kelp gulls
Right whales
topic Calf deaths
Micropredation
Kelp gulls
Right whales
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Reports of seabirds attacking marine mammals have become frequent in the 2000s. Southern right whales Eubalaena australis off Península Valdés (PV), Argentina, have suffered the effects of micropredation by kelp gulls Larus dominicanus since at least the 1970s. During 2003-2013, this population experienced 9 yr of unprecedented high calf mortality. Using a 25 yr dataset (1995-2019) of focal follows of gull-whale interactions, we studied long-term changes in gull attack intensity (attacks h-1) and frequency, and explored whether they influenced calf mortality. We also asked whether calf mortality was affected by prey density at maternal feeding grounds during gestation. Applying Bayesian models, we found that the intensity and frequency of attacks increased significantly from 1995 to the 2000s, and that in 2004-2019, calves received 2.85 times as many attacks as did mothers. Moreover, attacks significantly contributed to increase the probability of calves dying, such that a year with average overall harassment had 2.26 times the mortality of a hypothetical year with no attacks. In years of high intensity and frequency of attacks, many older calves died near the end of the season, probably reflecting the cumulative effect of gull harassment on calf health. However, calf mortality was not affected by prey density, and extremely high mortality was not related to extremely high frequency or intensity of attacks, indicating that deaths are also influenced by other unidentified factors. These findings imply that chronic micropredation contributed to the unprecedented high calf mortality observed in PV and that other marine mammal populations experiencing seabird attacks could be threatened.
Fil: Piotto, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina. Instituto de Conservacion de Ballenas;
Fil: Barberá, Iván. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Sironi, Mariano. Instituto de Conservacion de Ballenas; . Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; Argentina. Southern Right Whale Health Monitoring Program; Argentina
Fil: Rowntree, Victoria J.. University Of Utah. Department Of Biology; Estados Unidos. Ocean Alliance; Estados Unidos
Fil: Uhart, Marcela María. University of California at Davis; Estados Unidos. Southern Right Whale Health Monitoring Program; Argentina
Fil: Agrelo, Macarena. Instituto de Conservacion de Ballenas; . Universidade Federal de Santa Catarina; Brasil
Fil: Fernandez Ajo, Alejandro Apolo. Instituto de Conservacion de Ballenas; . State University of Oregon; Estados Unidos
Fil: Seger, Jon. University Of Utah. Department Of Biology; Estados Unidos
Fil: Marón, Carina Flavia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto de Conservacion de Ballenas; . Universidad Nacional de Cordoba. Facultad de Cs.exactas Fisicas y Naturales. Departamento de Biologia. Cat.de Ecologia General; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Cátedra de Diversidad Animal II; Argentina
description Reports of seabirds attacking marine mammals have become frequent in the 2000s. Southern right whales Eubalaena australis off Península Valdés (PV), Argentina, have suffered the effects of micropredation by kelp gulls Larus dominicanus since at least the 1970s. During 2003-2013, this population experienced 9 yr of unprecedented high calf mortality. Using a 25 yr dataset (1995-2019) of focal follows of gull-whale interactions, we studied long-term changes in gull attack intensity (attacks h-1) and frequency, and explored whether they influenced calf mortality. We also asked whether calf mortality was affected by prey density at maternal feeding grounds during gestation. Applying Bayesian models, we found that the intensity and frequency of attacks increased significantly from 1995 to the 2000s, and that in 2004-2019, calves received 2.85 times as many attacks as did mothers. Moreover, attacks significantly contributed to increase the probability of calves dying, such that a year with average overall harassment had 2.26 times the mortality of a hypothetical year with no attacks. In years of high intensity and frequency of attacks, many older calves died near the end of the season, probably reflecting the cumulative effect of gull harassment on calf health. However, calf mortality was not affected by prey density, and extremely high mortality was not related to extremely high frequency or intensity of attacks, indicating that deaths are also influenced by other unidentified factors. These findings imply that chronic micropredation contributed to the unprecedented high calf mortality observed in PV and that other marine mammal populations experiencing seabird attacks could be threatened.
publishDate 2024
dc.date.none.fl_str_mv 2024-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/260588
Piotto, María; Barberá, Iván; Sironi, Mariano; Rowntree, Victoria J.; Uhart, Marcela María; et al.; Seabird attacks contribute to calf mortality in a whale population; Inter-Research; Marine Ecology Progress Series; 746; 10-2024; 1-16
0171-8630
CONICET Digital
CONICET
url http://hdl.handle.net/11336/260588
identifier_str_mv Piotto, María; Barberá, Iván; Sironi, Mariano; Rowntree, Victoria J.; Uhart, Marcela María; et al.; Seabird attacks contribute to calf mortality in a whale population; Inter-Research; Marine Ecology Progress Series; 746; 10-2024; 1-16
0171-8630
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v746/p1-16/
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps14689
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Inter-Research
publisher.none.fl_str_mv Inter-Research
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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