叶猴(Presbytis)、金丝猴(Rhinopithecus)、长臂猿(Hylobates)自由取食时的利手现象

THE HAND PREFERENCE OF PRESBYTIS (PR),RHINOPITHECUS (RH), AND HYLOBATES (HY) IN PICKING UP FOOD

本文报道叶猴、金丝猴、长臂猿自由取食时的利手现象。本研究共用金丝猴12只(雄性8只,雌性4只),叶猴25只(雄性16只、雌性9只),长臂猿5只(雄性3只,雌性2只)。对每个动物而言,总观察次数不少于30次,其结果显示:在雄性金丝猴中,62.5％的动物显示右利,25％显示主利,12.5％无利手现象。在雄性叶猴中,62.5％的动物显示右利,18.7％显示左利,18.7％无利手现象。在3只雄性长臂猿中,2只显示右利,一只无利手现象。 统计结果表明:雄性金丝猴有明显的右利手现象(P<0.05),雄性叶猴右利手现象接近显著(P=0.06),长臂猿因观察数量太少,未进行统计。 在上述三种动物中,雌性个体无利手现象。 木工作结果提示:(1)雄性金丝猴,叶猴在自由取食时具有右利手现象,长臂猿也可能有右利手现象,(2)大脑两半球的不对称性与性别有关。

The animals used in this research were 12 RH (male: 8, female: 4), 25 PR (male: 16, female: 9) and 5 HY (male: 3, female: 2). Each animal was observed more than 30 times. The results show that 62.5% male RH were right-handed, 25% were left-handed and 12.5% were both hand preference. In male PR, 62.5% were right-handed, 18.7% were left-handed and 18.7% were both handed preference. In male Hy, two animals were right-handed, one animal was both-hand preference. Statistic data of this research show that there was clear right-hand preference in male RH (P<0.05) and there was right-hand preference which approachs the clear level (P = 0.06) in male PR. Data from HY were not calculated because of the limited number of ani-mal we used. In female RH, PR and HY, there were not deviation and laterality of hand preference.