Petersen Christopher W
Friday Harbor Laboratories, 620 University Road, 98250, Friday Harbor, WA, USA.
Oecologia. 1990 May;83(1):62-67. doi: 10.1007/BF00324635.
This paper examines the correlates of individual size, reproductive success, gonadal allocation, and growth in a hermaphroditic reef fish. Individuals in S. fasciatus mature as simultaneous hermaphrodites; large individuals subsequently lose female function and become functional males. Daily female reproductive success was highly correlated with both hermaphrodite size and amount of female gonadal tissue. Three separate comparisons gave a positive correlation between male reproductive success and male gonadal allocation: (1) Males had higher levels of male gonadal allocation and male reproductive success than hermaphrodites. (2) The percent of gonad allocated to male tissue in hermaphrodites was higher in the year they had higher male mating success. (3) Male gonadal tissue of hermaphrodites was positively correlated with male reproductive success in the year that male reproductive success by hermaphrodites was higher and more variable. There was no evidence for a trade-off between male function, female function, and growth among hermaphrodites. Many of these patterns have also been observed in plants, but the selective pressures leading to these patterns in S. fasciatus and plants are probably quite different.
本文研究了一种雌雄同体的珊瑚礁鱼类个体大小、繁殖成功率、性腺分配和生长之间的相关性。条纹海猪鱼个体同时成熟为雌雄同体；大型个体随后失去雌性功能并成为功能性雄鱼。每日雌性繁殖成功率与雌雄同体大小和雌性性腺组织量均高度相关。三项独立比较表明雄性繁殖成功率与雄性性腺分配呈正相关：（1）雄鱼比雌雄同体具有更高水平的雄性性腺分配和雄性繁殖成功率。（2）雌雄同体中分配给雄性组织的性腺百分比在其雄性交配成功率较高的年份更高。（3）在雌雄同体的雄性繁殖成功率较高且变化较大的年份，雌雄同体的雄性性腺组织与雄性繁殖成功率呈正相关。没有证据表明雌雄同体的雄性功能、雌性功能和生长之间存在权衡。许多这些模式在植物中也有观察到，但导致条纹海猪鱼和植物出现这些模式的选择压力可能有很大不同。
