Movements and activities of male black‐tailed gulls in breeding and sabbatical years. (1st July 2013)

• Record Type: Journal Article
• Authors: Kazama, Kentaro; Hirata, Kazuhiko; Yamamoto, Takashi; Hashimoto, Hiroshi; Takahashi, Akinori; Niizuma, Yasuaki; Trathan, Philip N.; Watanuki, Yutaka
• Is Part Of: Journal of avian biology. Volume 44:Number 6(2013:Nov.)
• Page Start: 603
• Page End: 608
• Publication Date: 2013-07-01
• Subjects: Ornithology -- Periodicals; Ornithology -- Scandinavia -- Periodicals; 598
• DOI: 10.1111/j.1600-048X.2013.00103.x
• Languages: English
• ISSNs: 0908-8857

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Long‐lived animals sometimes skip one or more breeding seasons; however, little is known about their movements and activities during such 'sabbatical' periods. Here we present novel data on year‐round movements and activities of two male black‐tailed gulls <italic>Larus crassirostris</italic> during a sabbatical year. We compare the data with those in a year when they bred and with those of two other breeding males. The year‐round migration routes of two sabbatical males were consistent with those of the breeding males: they returned to the breeding area but did not visit the colony in the sabbatical year. They landed more frequently on water (a potential index of foraging effort) during the non‐breeding autumn and winter prior to the sabbatical year than before breeding. Sabbatical gulls may forage more intensively to recover body condition immediately after breeding.</p> </abstract>