A COMPARATIVE-STUDY OF SPERM-EGG INTERACTIONS IN BIRDS
A COMPARATIVE-STUDY OF SPERM-EGG INTERACTIONS IN BIRDS
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DOI：
10.1530/jrf.0.1010353
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发表时间：
1994-07-01
期刊：
影响因子：
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通讯作者：
FLETCHER, F
中科院分区：
文献类型：
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作者：
BIRKHEAD, TR;SHELDON, BC;FLETCHER, F
对27种鸟类卵的卵周外层捕获的精子数量和穿透卵周内层的精子数量进行了比较研究。每个卵的精子总数（捕获的精子加上精子形成的孔）在29 ~ 164 000个之间，与卵的大小呈显著正相关。在大多数物种中，孔洞在生发盘周围形成了一个“晕”，这个区域的孔洞密度比其他地方要大得多，尤其是雀形目鸟类。在一些品种中，孔洞的高比例发生在离生发盘一定距离的地方。这似乎是一种人工现象，因为在受精和产卵之间，一些被困在卵泡外周层的精子会发生蛋白水解活动，并在卵泡内周层产生额外的孔，这些孔既在生发盘附近，也在远离卵泡的地方。在所有物种和大多数个体物种中，捕获精子的数量与卵周层内孔的数量呈正相关。一窝卵中连续卵子上精子总数的减少提供了精子从精子储存管中使用的比率的指数。
A comparative study was made of the number of spermatozoa trapped on the outer perivitelline layer and the number of spermatozoa penetrating the inner perivitelline layer of the eggs of 27 species of bird. The total number of spermatozoa (trapped spermatozoa plus holes made by spermatozoa) varied between 29 and 164 000 per egg among species and was significantly and positively correlated with size of the ovum. In most species, holes formed a 'halo' around the germinal disc area and the density of holes was much greater in this region than elsewhere, especially in passerine birds. In some species, a high proportion of holes occurred at some distance from the germinal disc. This seems to be an artefact due to the fact that some spermatozoa trapped in the outer perivitelline layer undergo proteolytic activity between fertilization and oviposition and create additional holes in the inner perivitelline layer both at and away from the germinal disc. Across all species and within most individual species, the number of trapped spermatozoa was positively correlated with the number of holes in the inner perivitelline layer. Decreases in the total number of spermatozoa on successive eggs of a clutch provided an index of the rate at which spermatozoa were used from the sperm storage tubules.