等级结构稳定性是衡量群体凝聚力的重要指标,雌性等级结构稳定对于母系社会群体具有重要的生物学意义。本文采用目标动物取样和全事件记录相结合的方法,研究黄山短尾猴鱼鳞坑A1群(YA1群)和鱼鳞坑A2群(YA2群)的成年雌性分别在交配季节(2011年9~12月)和非交配季节(2012年2~5月)内的攻击-屈服行为。采用等级结构中雌性间攻击-屈服频率、社会顺位和等级梯度3个量化指标,首次定量探讨了短尾猴雌性等级结构及其稳定性。研究期间,YA1群和YA2群雌性间攻击-屈服频率、社会顺位和等级梯度均无季节性变化(P〉0.05)。结果表征短尾猴雌性等级结构趋于稳定,该结果支持了短尾猴雌性等级结构稳定性的定性判断。
Dominance hierarchy stability has been used to measure group stability and cohesiveness.In female-philopatric species,the stability of the female dominance hierarchy is especially important in determining group dynamics.For four months each during the mating(September-December 2011)and non-mating(February-May 2012)seasons,we examined stability of the adult female dominance hierarchy in free-ranging Tibetan macaques(Macaca thibetana).We studied Yulinkeng(Y)A1 and YA2 groups,using focal animal and all-occurrences data collection methods.We investigated the female dominance hierarchy and its stability based on three quantitative indices:aggression-submission frequency,social ranks and hierarchical steepness.We found no variation by season in the three variables in either social group(P0.05).Our data indicate that,in YA1 and YA2,the female dominance hierarchy is stable.Our results support earlier,qualitative reports of female dominance hierarchy in this species.