排序方式: 共有1条查询结果,搜索用时 0 毫秒
1
1.
We estimated the cost to females of the lekking butterfly Coenonympha pamphilus of visiting males on leks instead of taking off and soliciting courtship from males passing them outside leks, as occurs
in the non-lekking congener C. tullia. We followed released virgin females of C. pamphilus in the field until they mated. We estimated the time they lost by remaining perched and not approaching males that passed
them, and observed how often and at what distance virgin females were passed by males in the field. We then calculated how
much faster these females would have been detected if they had taken off and approached these males, using probabilities of
detection as a function of passing distance derived from field observations on C. tullia females. C. pamphilus females on average lost 201 min by not approaching males on their way to leks. To estimate what this time loss meant in terms
of fitness, we measured how the age at mating affected fecundity. Using field measures of fecundity and mortality, the time
loss translated into an average 2.8% reduction in fecundity as a best estimate, and an average 1.3% reduction in fecundity
as a lower estimate. This fitness cost is larger than has been reported earlier for a lekking bird, but is probably too small
to eliminate the possibility of indirect benefits of mating with males on leks.
Received: 15 August 1996 / Accepted after revision: 24 January 1997 相似文献
1