Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand

Machovsky-Capuska, Gabriel E.; Hauber, Mark E.; Dassis, Mariela; Libby, Eric.; Schuckard, Rob; Wikelski, Martin; Melville, David S.; Cook, Willie; Houston, Michelle; Raubenheimer, David

Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand

Dateien

Machovsky_0-262343.pdfGröße: 237.91 KBDownloads: 586

Datum

2014

Autor:innen

Machovsky-Capuska, Gabriel E.

Hauber, Mark E.

Dassis, Mariela

Libby, Eric.

Schuckard, Rob

Wikelski, Martin

Melville, David S.

Cook, Willie

Houston, Michelle

Raubenheimer, David

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Titel in einer weiteren Sprache

Nahrungssuchverhalten und Habitatnutzung Australischer Tölpel während der Jungenaufzucht in Neuseeland

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Ornithology. 2014, 155(2), pp. 379-387. ISSN 2193-7192. eISSN 2193-7206. Available under: doi: 10.1007/s10336-013-1018-4

Zusammenfassung

Patchily distributed marine pelagic prey present considerable challenges to predatory seabirds, including Gannets (Morus spp.) departing from large breeding colonies. Here, for the first time, we used GPS data loggers to provide detailed spatial, temporal, and habitat metrics of chick-rearing Australasian Gannets (Morus serrator) foraging behaviours from two distant colonies in New Zealand. Our goal was to examine the extent to which Gannet foraging tactics vary across disparate habitats, and determine whether the observed differences are consistent with predictions derived from foraging studies of other gannet species. Foraging trip performance was highly consistent between colonies, and sexes, and no significant differences in any of the variables analyzed were observed. However, Gannets from Farewell Spit (FS) dove in shallower waters (0–50 m) than birds from Cape Kidnappers (CK, >50 m), which is consistent with previous dietary studies suggesting that FS Gannets feed mainly on coastal prey, whereas CK birds feed on species with a more oceanic distribution. Diving frequencies were similar in the two colonies suggesting that Gannets were foraging in habitats with similar levels of food availability. Further studies are needed to understand the relationship between prey availability, oceanography and geographic features, to better interpret foraging tactics of Australasian Gannets.

Zusammenfassung in einer weiteren Sprache

Lückenhaft verbreitete pelagische Beute stellt eine beträchtliche Herausforderung für nahrungssuchende Seevögel dar. Das gilt auch für Tölpel (Morus spp.), die aus großen Brutkolonien zur Nahrungssuche auf See abfliegen. In zwei weit voneinander entfernt liegenden Kolonien Australischer Tölpel (Morus serrator) in Neuseeland wurden nun zum ersten Mal GPS-Datenlogger eingesetzt, um während der Jungenaufzucht detaillierte Raum-Zeit-Daten sowie Informationen zur Habitatnutzung nahrungssuchender Tölpel zu erhalten. Ziel war es zum einen zu untersuchen, in welchem Ausmaß die Nahrungssuchstrategien der Tölpel variieren zwischen verschiedenen Habitaten. Zum anderen wurde bestimmt, ob die beobachteten Unterschiede konsistent sind mit Vorhersagen aus Studien zur Nahrungssuche anderer Tölpelarten. Die Nahrungsflug-Leistung war einheitlich zwischen den Kolonien und Geschlechtern. Es konnten keine signifikanten Unterschiede zwischen den weiteren analysierten Variablen nachgewiesen werden. Allerdings tauchten Tölpel der Farewell Spit Kolonie (FS) in flacheren Gewässern (0–50 m) als Vögel aus der Cape Kidnappers Kolonie (CK, >50 m). Frühere Nahrungsstudien bestätigen dies und deuten darauf hin, dass FS Tölpel hauptsächlich küstennahe Beute fressen, wohingegen CK Tölpel mehr ozeanisch verbreitete Nahrung aufnehmen. Die Tauchfrequenzen waren ähnlich in beiden Kolonien, was darauf schließen lässt, dass Tölpel in Habitaten mit ähnlichen Beuteverfügbarkeiten auf Nahrungssuche gehen. Weiterführende Untersuchungen zur Beziehung zwischen Beuteverfügbarkeit, Ozeanografie und geografischen Eigenschaften sind nötig, um die Strategien der Nahrungssuche Australischer Tölpel besser zu verstehen und interpretieren zu können.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

MACHOVSKY-CAPUSKA, Gabriel E., Mark E. HAUBER, Mariela DASSIS, Eric. LIBBY, Rob SCHUCKARD, Martin WIKELSKI, David S. MELVILLE, Willie COOK, Michelle HOUSTON, David RAUBENHEIMER, 2014. Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand. In: Journal of Ornithology. 2014, 155(2), pp. 379-387. ISSN 2193-7192. eISSN 2193-7206. Available under: doi: 10.1007/s10336-013-1018-4

BibTex

@article{MachovskyCapuska2014Forag-30711,
  year={2014},
  doi={10.1007/s10336-013-1018-4},
  title={Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand},
  number={2},
  volume={155},
  issn={2193-7192},
  journal={Journal of Ornithology},
  pages={379--387},
  author={Machovsky-Capuska, Gabriel E. and Hauber, Mark E. and Dassis, Mariela and Libby, Eric. and Schuckard, Rob and Wikelski, Martin and Melville, David S. and Cook, Willie and Houston, Michelle and Raubenheimer, David}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/30711">
    <dcterms:alternative>Nahrungssuchverhalten und Habitatnutzung Australischer Tölpel während der Jungenaufzucht in Neuseeland</dcterms:alternative>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-04-10T09:05:41Z</dcterms:available>
    <dc:language>eng</dc:language>
    <dc:contributor>Wikelski, Martin</dc:contributor>
    <dcterms:issued>2014</dcterms:issued>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/30711"/>
    <dc:contributor>Hauber, Mark E.</dc:contributor>
    <dc:contributor>Dassis, Mariela</dc:contributor>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Machovsky-Capuska, Gabriel E.</dc:contributor>
    <dc:creator>Hauber, Mark E.</dc:creator>
    <dc:creator>Libby, Eric.</dc:creator>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Raubenheimer, David</dc:creator>
    <dc:creator>Dassis, Mariela</dc:creator>
    <dc:creator>Wikelski, Martin</dc:creator>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Libby, Eric.</dc:contributor>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-04-10T09:05:41Z</dc:date>
    <dcterms:title>Foraging behaviour and habitat use of chick-rearing Australasian Gannets in New Zealand</dcterms:title>
    <dc:creator>Houston, Michelle</dc:creator>
    <dc:contributor>Raubenheimer, David</dc:contributor>
    <dc:creator>Cook, Willie</dc:creator>
    <dc:rights>terms-of-use</dc:rights>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dc:creator>Melville, David S.</dc:creator>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/30711/3/Machovsky_0-262343.pdf"/>
    <dc:creator>Schuckard, Rob</dc:creator>
    <dc:contributor>Melville, David S.</dc:contributor>
    <dcterms:abstract xml:lang="eng">Patchily distributed marine pelagic prey present considerable challenges to predatory seabirds, including Gannets (Morus spp.) departing from large breeding colonies. Here, for the first time, we used GPS data loggers to provide detailed spatial, temporal, and habitat metrics of chick-rearing Australasian Gannets (Morus serrator) foraging behaviours from two distant colonies in New Zealand. Our goal was to examine the extent to which Gannet foraging tactics vary across disparate habitats, and determine whether the observed differences are consistent with predictions derived from foraging studies of other gannet species. Foraging trip performance was highly consistent between colonies, and sexes, and no significant differences in any of the variables analyzed were observed. However, Gannets from Farewell Spit (FS) dove in shallower waters (0–50 m) than birds from Cape Kidnappers (CK, &gt;50 m), which is consistent with previous dietary studies suggesting that FS Gannets feed mainly on coastal prey, whereas CK birds feed on species with a more oceanic distribution. Diving frequencies were similar in the two colonies suggesting that Gannets were foraging in habitats with similar levels of food availability. Further studies are needed to understand the relationship between prey availability, oceanography and geographic features, to better interpret foraging tactics of Australasian Gannets.</dcterms:abstract>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/30711/3/Machovsky_0-262343.pdf"/>
    <dc:creator>Machovsky-Capuska, Gabriel E.</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dc:contributor>Cook, Willie</dc:contributor>
    <dc:contributor>Houston, Michelle</dc:contributor>
    <dc:contributor>Schuckard, Rob</dc:contributor>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Ja