DISTRIBUTION, POPULATION-SIZE AND CONSERVATION OF THE CASPIAN TERN STERNA-CASPIA IN SOUTHERN AFRICA

被引：8
作者：
COOPER, J
BROOKE, RK
CYRUS, DP
MARTIN, AP
TAYLOR, RH
WILLIAMS, AJ
机构：
[1] Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch
[2] Coastal Research Unit of Zululand, Department of Zoology, University of Zululand, KwaDlangezwa, 3886
[3] Department of Zoology, University of Port Elizabeth, Port Elizabeth, 6000
[4] Natal Parks Board, St Lucia Estuary, 3936
[5] Cape Nature Conservation, Walvis Bay, 9190
来源：
OSTRICH | 1992年 / 63卷 / 2-3期
关键词：
D O I：
10.1080/00306525.1992.9633950
中图分类号：
Q95 [动物学];
学科分类号：
071002 ;
摘要：
The Caspian Tern Sterna caspia occurs along the whole southern African coastline and on large river systems and water bodies away from the coast. A total of 28 definite breeding localities has been recorded in southern Africa. Breeding has occurred recently at at least 14 coastal localities between Swakopmund, Namibia, and Lake St Lucia, Natal, South Africa. Inland breeding has been recorded in recent years at Sua Pan, Botswana and Kalkfonteindam, Orange Free State, South Africa. Based on censuses conducted between 1980 and 1991, the southern African breeding population is estimated to be of the order of 500 pairs, 91% of which breed coastally and 89% breed on islands. Up to 290 pairs (58%) bred at Lake St Lucia. Seventyone per cent of the 1980-1991 breeding population falls within eight nature reserves. Conservation of the Caspian Tern in southern Africa requires protection at breeding localities, including commercial salt and soda ash extraction works, against the effects of changing water levels, human disturbance and predation. Pesticide levels of addled and abandoned eggs should be measured at selected breeding localities.
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页码：58 / 67
页数：10
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