Sexual dominance in hermit crab shell fights: asymmetries in owner–intruder status, crab size, and resource value between sexes
Sexual dominance in hermit crab shell fights: asymmetries in owner–intruder status, crab size, and resource value between sexes
复制标题
寄居蟹壳争夺中的性别优势：两性之间主人与入侵者地位、螃蟹大小和资源价值的不对称
DOI：
10.1007/s10164-002-0055-x
复制
发表时间：
2002
影响因子：
0.9
通讯作者：
S. Goshima
中科院分区：
文献类型：
--
作者：
K. Yoshino;S. Goshima
我们研究了寄居蟹 Pagurus filholiin 种内竞争中个体攻击性的性别优势和季节差异，包括参赛者的体型大小和试图剥夺其他蟹壳的持续时间。在繁殖前和繁殖后季节，通过配对的内性和间性竞赛进行了实验。参赛者之间的体型比例被系统地改变，以评估体型和所有者优势方面的性别差异。在两性内和两性之间的竞争中，随着体型的增大，入侵者蟹往往更容易赢得比赛，也就是说，体型优势战胜了主人优势。尽管我们没有认识到大小和主人在竞争结果中的优势存在性别差异，但雄性入侵蟹剥夺雌性主人的壳的时间比剥夺雄性主人的时间更短。此外，繁殖前季节的雄性个体的战斗持续时间明显更长。战斗是要付出代价的。因此，雄性可以花费更多的精力和时间进行战斗，这表明在甲壳战斗中，雄性作为入侵者和主人都比雌性更具优势。
We studied sexual dominance and seasonal differences in aggressiveness of individuals in intraspecific competition for shells of the hermit crabPagurus filholiin terms of size of contestants and duration of the attempt to deprive other crabs of their shell. Experiments were conducted using paired intrasexual and intersexual contests in the pre-breeding and post-breeding seasons. Size ratios between contestants were systematically varied to assess the sexual difference in size and owner advantages. In both intrasexual and intersexual contests intruder crabs tended to win the contests more often as their size increased, that is, size advantage overcame owner advantage. Although we did not recognize a sexual difference in size and owner advantages in contest outcomes, male intruder crabs took a shorter time to deprive female owners of a shell than to deprive male owners. Furthermore, male individuals in the pre-breeding season had significantly longer fight durations. Fighting is costly. Thus males can afford to expend more energy and time fighting, indicating that males are dominant over females in shell fights as both intruders and owners.