DYNAMICS OF LOCAL AND TEMPORAL BREEDING ASSEMBLAGES IN A BUFO-CALAMITA METAPOPULATION

被引:35
作者
SINSCH, U
SEIDEL, D
机构
[1] Institute for Biology, University of Koblenz-Landau, Koblenz
来源
AUSTRALIAN JOURNAL OF ECOLOGY | 1995年 / 20卷 / 03期
关键词
BUFO CALAMITA; LOCAL POPULATIONS; METAPOPULATION; MIGRATION; SEX-BIAS; SITE FIDELITY; TEMPORAL POPULATIONS;
D O I
10.1111/j.1442-9993.1995.tb00550.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Natterjack toads (Bufo calamita) form metapopulations consisting of interacting local and temporal breeding assemblages. The gene flow between simultaneously reproductive local populations is limited at the adult stage to about 2% roaming males and around 20% of females. The gene flow between temporal populations breeding successively at the same locality is based on about 0-15% of males and 0-29% of females reproducing in different temporal breeding assemblages. The annual mortality rate of males ranges between 50 and 60%, corresponding to a maximum life expectancy of about 7 years. The main cause of local extinction is always deterioration of the habitat, namely destruction of the breeding habitat or a dry climate.
引用
收藏
页码:351 / 361
页数:11
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