MALE MATING SUCCESS AND SURVIVAL IN THE FIELD WITH RESPECT TO SIZE AND COURTSHIP SONG CHARACTERS IN DROSOPHILA-LITTORALIS AND D-MONTANA (DIPTERA, DROSOPHILIDAE)
MALE MATING SUCCESS AND SURVIVAL IN THE FIELD WITH RESPECT TO SIZE AND COURTSHIP SONG CHARACTERS IN DROSOPHILA-LITTORALIS AND D-MONTANA (DIPTERA, DROSOPHILIDAE)
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DOI：
10.1007/bf01990970
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发表时间：
1995-01-01
影响因子：
1
通讯作者：
HOIKKALA, A
中科院分区：
文献类型：
--
作者：
ASPI, J;HOIKKALA, A
通过两年的野外调查，研究了雄性鸣唱和形态特征对雄性交配成功率的影响。littoralis和D.蒙大拿我们比较了交配苍蝇的属性与随机男性样本在同一时间和地点。In D. littoralis的雄性个体大小对其交配成功率没有影响，而D.在第一个研究年度，蒙大拿州的小雄性在田间具有交配优势。女性更喜欢男性短声脉冲在这两个物种。我们还研究了男性形态和歌曲字符和生活力之间的关系，收集雄蝇在夏末和比较男性字符的手段越冬苍蝇的第二年春天。In D.雄性个体大小对越冬存活率无影响。In D.蒙大拿州的大苍蝇比小苍蝇存活得更好。在这两个物种在冬季休眠期间的歌曲字符的转变是相反的性选择所造成的。因此，我们的研究结果意味着性选择和自然选择的力量之间可能存在平衡，这两种力量对有吸引力的男性特征起着相反的作用。
We investigated the importance of male song and morphological characters to the male mating success in a two-year field study in natural populations of D. littoralis and D. montana. We compared the properties of mating flies with those of a random male sample taken at the same time and place. In D. littoralis the male's size had no effect on his mating success, while in D. montana small males had a mating advantage in the field during the first study year. Females preferred males with short sound pulses in both species. We also examined the relationship between male morphological and song characters and viability by collecting male flies in late summer and comparing the means of male characters to those of overwintered flies the next spring. In D. littoralis male size had no effect on overwinter survival. In D. montana large flies survived better than small flies. In both species the shifts in song characters during the winter dormancy were opposite to those caused by sexual selection. Our results, accordingly, imply a possible balance between the forces of sexual and natural selection, which act in opposing directions on attractive male traits.