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dc.contributor.authorLorentsen, Svein-Håkon
dc.contributor.authorAnker-Nilssen, Tycho
dc.contributor.authorBarrett, Robert
dc.contributor.authorSystad, Geir Helge Rødli
dc.coverage.spatialNorway, Skagerak, Rogaland, Østfolden_US
dc.date.accessioned2022-08-29T10:36:06Z
dc.date.available2022-08-29T10:36:06Z
dc.date.created2022-08-03T09:22:29Z
dc.date.issued2021
dc.identifier.citationArdea. 2021, 109 (3), 299-312.en_US
dc.identifier.issn0373-2266
dc.identifier.urihttps://hdl.handle.net/11250/3014109
dc.description.abstractTwo subspecies of the Great Cormorant breed in Norway, the continental Phalacrocorax carbo sinensis in the south, along the Skagerrak coast, and the marine P. c. carbo from central Norway and northwards. Here we review the information existing until 2017 on population status and trends, breeding performance and diet of these two subspecies in Norway. The most recent national population estimates are approximately 2500 (in 2012) and 19,000 (in 2012–2014) breeding pairs of sinensis and carbo, respectively. The sinensis population established itself in 1996 in Rogaland at the south-western tip of Norway, and in 1997 in Østfold close to the Swedish border; in both areas it increased for about ten years. Since then, the numbers have stabilised. For carbo, the population increased from 21,000 pairs in the early 1980s to 27,000 in 1995, and then decreased to the current number of 19,000 pairs. Significant annual variations in clutch size and reproductive output have been observed, but the drivers of these changes have not been identified. Unidentified gadoids and Atlantic Cod Gadus morhua were the most common prey of carbo, whereas inshore species such as Corkwing Wrasse Symphodus melops, Rockcook Centrolabrus exoletus, Goldsinny Wrasse Ctenolabrus rupestris and Black Goby Gobius niger were the most common prey in the eastern Skagerrak caught by sinensis. Carbo took very large numbers of 1–3-year-old gadoids during the year, and we cannot exclude the possibility this can have local effects on fish mortality rates. Great Cormorant, Norway, sinensis, carbo, population changes, breeding performance, dieten_US
dc.language.isoengen_US
dc.subjectGreat Cormoranten_US
dc.subjectNorwayen_US
dc.subjectsinensisen_US
dc.subjectcarboen_US
dc.subjectpopulation changesen_US
dc.subjectbreeding performanceen_US
dc.subjectdieten_US
dc.titlePopulation status, breeding biology and diet of Norwegian Great Cormorantsen_US
dc.title.alternativePopulation status, breeding biology and diet of Norwegian Great Cormorantsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.pagenumber299-312en_US
dc.source.volume109en_US
dc.source.journalArdeaen_US
dc.source.issue3en_US
dc.identifier.doi10.5253/arde.v109i2.a4
dc.identifier.cristin2040815
dc.relation.projectAndre: Norwegian Environment Agencyen_US
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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