Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping

Population size assessments for nocturnal burrow-nesting seabirds are logistically challenging because these species are active in colonies only during darkness and often nest on remote islands where manual inspections of breeding burrows are not feasible. Many seabird species are highly vocal, and...

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Autores: Oppel, Steffen, Hervías-Parejo, Sandra, Oliveira, Nuno, Pipa, T., Silva, Carlos, Geraldes, Pedro, Goh, Michelle, Immler, Eva, McKown, Matthew
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/180364
Acceso en línea:http://hdl.handle.net/10261/180364
Access Level:acceso abierto
Palabra clave:Nest Density
Calonectris borealis
Vocal Activity
Random forest
Cory’s shearwater
Azores
Macaronesia
Procellariformes
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spelling Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mappingOppel, SteffenHervías-Parejo, SandraOliveira, NunoPipa, T.Silva, CarlosGeraldes, PedroGoh, MichelleImmler, EvaMcKown, MatthewNest DensityCalonectris borealisVocal ActivityRandom forestCory’s shearwaterAzoresMacaronesiaProcellariformesPopulation size assessments for nocturnal burrow-nesting seabirds are logistically challenging because these species are active in colonies only during darkness and often nest on remote islands where manual inspections of breeding burrows are not feasible. Many seabird species are highly vocal, and recent technological innovations now make it possible to record and quantify vocal activity in seabird colonies. Here we test the hypothesis that remotely recorded vocal activity in Cory’s shearwater (Calonectris borealis) breeding colonies in the North Atlantic increases with nest density, and combined this relationship with cliff habitat mapping to estimate the population size of Cory’s shearwaters on the island of Corvo (Azores). We deployed acoustic recording devices in 9 Cory’s shearwater colonies of known size to establish a relationship between vocal activity and local nest density (slope = 1.07, R2 = 0.86, p < 0.001). We used this relationship to predict the nest density in various cliff habitat types and produced a habitat map of breeding cliffs to extrapolate nest density around the island of Corvo. The mean predicted nest density on Corvo ranged from 6.6 (2.1–16.2) to 27.8 (19.5–36.4) nests/ha. Extrapolation of habitat-specific nest densities across the cliff area of Corvo resulted in an estimate of 6326 Cory’s shearwater nests (95% confidence interval: 3735–10, 524). This population size estimate is similar to previous assessments, but is too imprecise to detect moderate changes in population size over time. While estimating absolute population size from acoustic recordings may not be sufficiently precise, the strong positive relationship that we found between local nest density and recorded calling rate indicates that passive acoustic monitoring may be useful to document relative changes in seabird populations over time.This work was co-financed by the European Union (LIFE07 NAT/P/000649).Peer ReviewedPensoft PublishersEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920142019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/180364reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3897/natureconservation.7.6890Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1803642026-05-22T06:33:51Z
dc.title.none.fl_str_mv Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
title Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
spellingShingle Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
Oppel, Steffen
Nest Density
Calonectris borealis
Vocal Activity
Random forest
Cory’s shearwater
Azores
Macaronesia
Procellariformes
title_short Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
title_full Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
title_fullStr Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
title_full_unstemmed Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
title_sort Estimating population size of a nocturnal burrow-nesting seabird using acoustic monitoring and habitat mapping
dc.creator.none.fl_str_mv Oppel, Steffen
Hervías-Parejo, Sandra
Oliveira, Nuno
Pipa, T.
Silva, Carlos
Geraldes, Pedro
Goh, Michelle
Immler, Eva
McKown, Matthew
author Oppel, Steffen
author_facet Oppel, Steffen
Hervías-Parejo, Sandra
Oliveira, Nuno
Pipa, T.
Silva, Carlos
Geraldes, Pedro
Goh, Michelle
Immler, Eva
McKown, Matthew
author_role author
author2 Hervías-Parejo, Sandra
Oliveira, Nuno
Pipa, T.
Silva, Carlos
Geraldes, Pedro
Goh, Michelle
Immler, Eva
McKown, Matthew
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Nest Density
Calonectris borealis
Vocal Activity
Random forest
Cory’s shearwater
Azores
Macaronesia
Procellariformes
topic Nest Density
Calonectris borealis
Vocal Activity
Random forest
Cory’s shearwater
Azores
Macaronesia
Procellariformes
description Population size assessments for nocturnal burrow-nesting seabirds are logistically challenging because these species are active in colonies only during darkness and often nest on remote islands where manual inspections of breeding burrows are not feasible. Many seabird species are highly vocal, and recent technological innovations now make it possible to record and quantify vocal activity in seabird colonies. Here we test the hypothesis that remotely recorded vocal activity in Cory’s shearwater (Calonectris borealis) breeding colonies in the North Atlantic increases with nest density, and combined this relationship with cliff habitat mapping to estimate the population size of Cory’s shearwaters on the island of Corvo (Azores). We deployed acoustic recording devices in 9 Cory’s shearwater colonies of known size to establish a relationship between vocal activity and local nest density (slope = 1.07, R2 = 0.86, p < 0.001). We used this relationship to predict the nest density in various cliff habitat types and produced a habitat map of breeding cliffs to extrapolate nest density around the island of Corvo. The mean predicted nest density on Corvo ranged from 6.6 (2.1–16.2) to 27.8 (19.5–36.4) nests/ha. Extrapolation of habitat-specific nest densities across the cliff area of Corvo resulted in an estimate of 6326 Cory’s shearwater nests (95% confidence interval: 3735–10, 524). This population size estimate is similar to previous assessments, but is too imprecise to detect moderate changes in population size over time. While estimating absolute population size from acoustic recordings may not be sufficiently precise, the strong positive relationship that we found between local nest density and recorded calling rate indicates that passive acoustic monitoring may be useful to document relative changes in seabird populations over time.
publishDate 2014
dc.date.none.fl_str_mv 2014
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/180364
url http://hdl.handle.net/10261/180364
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3897/natureconservation.7.6890
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Pensoft Publishers
publisher.none.fl_str_mv Pensoft Publishers
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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