POPULATION-SIZE, DISTRIBUTION AND DISPERSAL OF KELP GULLS IN THE SOUTHWESTERN CAPE, SOUTH-AFRICA

被引：29

作者：

STEELE, WK

HOCKEY, PAR

机构：

[1] Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch

来源：

OSTRICH | 1990年 / 61卷 / 3-4期

关键词：

D O I：

10.1080/00306525.1990.9634153

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

There are indications that the Kelp Gull Larus dominicanus population of the southwestern Cape Province, South Africa, is increasing. It is proposed that decreased post-fledging mortality due to supplementary food from man's activities, at sites such as fishing harbours and refuse dumps, is likely to be the main cause of this population increse. Kelp Gulls aggregate, and juveniles (first-year birds) are disproportionately abundant, at sites where supplementary food is available. Juvenile dispersal from the two largest breeding colonies, 38 km apart, is in opposite directions.

引用

页码：97 / 106

页数：10

共 46 条

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