The Evolution of Sexual Patterns in the Seabasses

摘要: he variety of sexual patterns exhibited by animals and plants includes almost every possible combination sex change, hermaphroditism, self-fertilization, parthenogenesis. However, the distribution these is far from uniform. For example, consider cosexuality, where each individual has active male female reproductive organs. This pattern very common in plants, fairly invertebrates, but rare among vertebrates. It occurs as a normal mode reproduction only eleven out several hundred fish families (Smith 1975, Warner 1978). A major task evolutionary biologists to account for allocation. Largescale comparative studies (Ghiselin 1969, 1974, Maynard Smith 1978, Policansky 1982) have not been altogether successful, largely because two problems inherent method (Clutton-Brock Harvey 1984). First, it difficult separate influence environmental factors