Intraspecific nest parasitism and extra-pair copulation in lesser snow geese
Intraspecific nest parasitism and extra-pair copulation in lesser snow geese
复制标题
小雪雁的种内巢寄生和配对外交配
DOI：
10.1016/0003-3472(89)90008-0
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发表时间：
1989
期刊：
影响因子：
2.5
通讯作者：
F. Cooke
中科院分区：
文献类型：
--
作者：
D. Lank;P. Mineau;R. Rockwell;F. Cooke
在加拿大北方马尼托巴，对一群羽毛多态性较小的雪雁（Chen caerulescens caerulescens）进行了14年的研究，结果表明，种内巢寄生和对外受精对个体繁殖成功有显著的影响。寄生的女性喜欢躺在或邻近占领，防御巢，而不是不设防的巢。筑巢的雌性通常会把附近产下的蛋滚进巢里。守巢的雄鸟通常会攻击入侵的雌鸟的配偶，而后者通常会停留在很短的距离内，从而将常驻的雄鸟从巢穴中吸引走。羽毛遗传学被用来估计巢寄生率和额外对受精。纯合显性蓝色变体对的巢产生了4.03%的纯合隐性白色雏鹅（N= 4938），这些雏鹅一定与双亲无关，提供了巢寄生率的信息。纯合隐性白色变体对的巢产生了2.12%的蓝雏（N= 45777），这一定是与一个或两个父母无关，提供了巢寄生率加上额外对受精的信息。通过对所产雏鹅的颜色比例（28.5%为蓝色）和雄性雏鹅的蓝色等位基因频率（21%）进行群体范围内的估计，计算出巢寄生占孵化雏鹅的5.6%，2.4%的雏鹅是通过对外受精而产生的。
Intraspecific nest parasitism and extra-pair fertilization contributed significantly to individual reproductive success in a colony of plumage polymorphic lesser snow geese,Chen caerulescens caerulescens, studied for 14 years in northern Manitoba, Canada. Parasitic females preferred to lay in or adjacent to occupied, defended nests, rather than undefended nests. Nesting females usually rolled eggs that had been laid nearby into their nests. Nest-attendant males typically attacked the intruding female's mate, who usually remained at a short distance, thereby drawing the resident male away from the nest. Plumage genetics were used to estimate rates of both nest parasitism and extra-pair fertilization. Nests of homozygous dominant blue morph pairs produced 4·03% homozygous recessive white goslings (N= 4938), which must have been unrelated to both parents, providing information on the rate of nest parasitism. Nests of homozygous recessive white morph pairs produced 2·12% blue goslings (N= 45 777), which must have been unrelated to either one or both parents, providing information on the rate of nest parasitism plus extra-pair fertilization. Using colony-wide estimates of the colour ratio of goslings produced (28·5% blue) and of the blue allele frequency in males (21%), it was calculated that nest parasitism accounted for 5·6% of hatching goslings, and that 2·4% of goslings were fathered by extra-pair fertilization.