Thorpe K E, Huntingford F A, Taylor A C
Department of Zoology, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK.
Behav Processes. 1994 Nov;32(3):235-46. doi: 10.1016/0376-6357(94)90045-0.
Female velvet swimming crabs (Necora puber) fight readily in the laboratory, with interactions being initiated equally often by the larger and smaller of the two opponents, but with the larger usually being victorious. In 17 out of 65 interactions, however, a smaller crab won against a larger one, and possible reasons for this are discussed. In two respects our results are surprising in the context of insights gained from games theory: firstly, the fights do not show a gradual pattern of escalation through display to overt physical violence; and secondly, fights do not become more costly in terms of either potential for injury (intensity) or duration as the contestants became more evenly matched; indeed, as the contestants became more evenly matched, fight duration decreased.
雌性天鹅绒游泳蟹（Necora puber）在实验室中很容易发生争斗，两只对手中较大和较小的蟹发起互动的频率相同，但较大的蟹通常会获胜。然而，在65次互动中有17次，较小的蟹战胜了较大的蟹，并讨论了其中可能的原因。从博弈论获得的见解来看，我们的结果在两个方面令人惊讶：第一，争斗并没有呈现出从展示到公开身体暴力的逐步升级模式；第二，随着参赛者变得更加势均力敌，争斗在潜在伤害（强度）或持续时间方面的代价并没有变得更高；事实上，随着参赛者变得更加势均力敌，争斗持续时间缩短了。
