Chorus tenure and estimates of population size of male European tree frogs Hyla arborea:: implications for conservation
Chorus tenure and estimates of population size of male European tree frogs Hyla arborea:: implications for conservation
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DOI：
10.1163/156853805774806269
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发表时间：
2005-12-01
影响因子：
1.6
通讯作者：
Meuche, I
中科院分区：
文献类型：
--
作者：
Grafe, TU;Meuche, I
合唱的雄性无尾两栖类通常只在繁殖季节的一部分时间里鸣叫，尽管合唱团的任期通常是交配成功的最佳预测因素。我们确定了男性参加合唱团（合唱任期）的夜晚数及其对欧洲树蛙，树雨蛙交配成功的影响。在38个夜晚的研究季节中，合唱团的平均任期为7.5个夜晚。在合唱团中度过两个晚上以上的男性在合唱团的第一个晚上和最后一个晚上之间平均有47%的夜晚。每日最低温度，环境温度在开始调用，和每日降雨量解释37.8%的方差在男性出席。25只雄性在活动高峰的晚上打电话，这是44只雄性中的一小部分。这表明，保护生物学家广泛使用的基于高峰活动的雄性种群规模估计是不准确的。我们建议，当标记-再捕获方法不能使用，男性人口规模计算使用回归模型的基础上，可以进一步发展，随着更多的数据积累的呼叫男性的峰值数。
Chorusing male anurans typically spend only a part of the breeding season calling although chorus tenure is often the best predictor of mating success. We determined the number of nights males attended a chorus (chorus tenure) and its influence on mating success in the European tree frog, Hyla arborea. The median chorus tenure was 7.5 nights out of a study season of 38 nights. Males that spent more than two nights in the chorus were present for an average of 47% of the nights between their first and last night in the chorus. Minimum daily temperature, ambient temperature at initiation of calling, and daily rainfall explained 37.8% of the variance in male attendance. Twenty-five males were calling on the night of peak activity, a fraction of the 44 males marked. This suggests that estimates of male population size based on peak activity, widely used by conservation biologists, are inaccurate. We suggest that, when mark-recapture methods cannot be used, male population size be calculated by using a regression model based on the peak number of calling males that can be further developed as more data accumulates.