Increased density and male-male interactions reduce male longevity in the medfly, Ceratitis capitata
Increased density and male-male interactions reduce male longevity in the medfly, Ceratitis capitata
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DOI：
10.1006/anbe.2001.1896
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发表时间：
2002-01-01
期刊：
影响因子：
2.5
通讯作者：
Chapman, T
中科院分区：
文献类型：
--
作者：
Gaskin, T;Futerman, P;Chapman, T
我们研究了大规模饲养的地中海果蝇品系中成虫密度对雄性和雌性寿命以及行为相互作用的影响。随着雄性密度的增加（雄性在直径 5.5 厘米、高 12 厘米的花盆中每 285 厘米（2）饲养 1、2、6 和 10 只果蝇），雄性存活率显着下降，雄性之间的行为相互作用显着增加。在相同密度范围内的雌性中没有观察到这种效应。这表明男性存活率下降是由于男性与男性行为相互作用的有害影响。在最高密度下，随着时间的推移，针对其他雄性的求偶翅膀扇动显着减少。此外，随着密度或偏雄性的性别比例的增加，雄性越来越有可能进行不针对雌性的求偶扇动。这些结果表明，高成虫密度可能会降低存活率和交配成功率，从而显着降低雄性繁殖成功率。结果强调了男性与男性相互作用的潜在高生存成本，并表明两种性别的生殖成本性质存在差异。 (C) 2002 年动物行为研究协会。
We investigated the effect of adult density on male and female longevity and behavioural interactions in a mass-reared strain of the medfly. Male survival decreased significantly, and male-male behavioural interactions increased significantly, with increasing male density (males were kept at 1, 2, 6 and 10 flies per 285 cm(2) in pots of 5.5 cm in diameter and 12 cm. high). No such effects were observed in females over the same density range. This suggests that male survival decreased in response to the deleterious effects of male-male behavioural interactions. At the highest density, courtship wing fanning directed towards other males decreased significantly over time. In addition, as either density or male-biased sex ratio increased, males were increasingly likely to be engaged in courtship wing fanning that was not directed towards females. These results suggest that high adult density may significantly reduce male reproductive success, by decreasing survival and mating success. The results highlight the potentially high survival costs of male-male interactions and indicate differences in the nature of reproductive costs in the two sexes. (C) 2002 The Association for the Study of Animal Behaviour.