首页   按字顺浏览 期刊浏览 卷期浏览 Food and Feeding Range of the Australasian GannetMorus Serrator(Gray)
Food and Feeding Range of the Australasian GannetMorus Serrator(Gray)

 

作者: WinghamElspeth J.,  

 

期刊: Emu - Austral Ornithology  (Taylor Available online 1985)
卷期: Volume 85, issue 4  

页码: 231-239

 

ISSN:0158-4197

 

年代: 1985

 

DOI:10.1071/MU9850231

 

出版商: Taylor&Francis

 

数据来源: Taylor

 

摘要:

SUMMARYWingham, E.J. 1985. Food and feeding range of the Australasian GannetMorus senator(Gray). Emu 85: 231–239.Regurgitations analysed over three seasons (1978–80) indicated that PilchardsSardinops neopilchardus, both numerically and by weight, were the most common prey species of the Australasian Gannet at Motukaramarama. The next most common species were: numerically, AnchoviesEngraulis australisand by weight, Jack MackerelTrachurus novaeselandiae.It is thought that relative abundance of prey analysed reflects their abundance. Prey between 11–20 cm comprised 77% of the Gannet's diet.A further two prey species: SpratSprattus antipodumand KahawaiArripis truttawere recorded, bringing the known food of the Gannet to 15 species.The average adult Gannet regurgitated food equal to 11 % of its body weight (or 259 g and 2,000 Kj), whereas the average daily energy requirements were estimated at 2,844 Kj/day, or 353 g of food.An average feeding range of 268 km (range = 86–450 km) was estimated from the time adults spent away from the colony, resighting of marked birds and from recoveries of banded, breeding adults.

 

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