Body weight of wild and captive common marmosets (Callithrix jacchus)
Body weight of wild and captive common marmosets (Callithrix jacchus)
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DOI：
10.1023/a:1005433722475
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发表时间：
2000-04-01
影响因子：
2.5
通讯作者：
Yamamoto, ME
中科院分区：
文献类型：
--
作者：
Araújo, A;Arruda, MF;Yamamoto, ME
圈养研究和偶尔对野生个体的诱捕表明，富营养化鸟的体型和体重较小，缺乏两性二态性。我们比较了巴西两个种群的圈养和野生刺萼虫的体重。我们通过对北格兰德联邦大学（universsidade Federal do里约热内卢Grande do north）殖民地的138只个体进行常规称重获得圈养数据，并通过定期捕获IBAMA在Nisia Floresta的野外站点的15个自由放养群体中的243只个体获得野生数据。根据受试者的出生日期或体型、生殖状况和牙齿发育情况，我们将所有受试者分为婴儿、青少年、亚成人和成人四个年龄段。雄性和雌性在4个年龄组中均无显著差异，但圈养被试在除婴儿外的所有年龄组均比野生被试重。育龄和非育龄成年雌性在体重上没有统计学差异。这些结果与之前关于普通狨猴缺乏体型性别二态性的报道一致，并表明野生和圈养普通狨猴之间的差异不是先天的，而是饮食和身体活动的结果。具有生殖能力和非生殖能力的雌性之间没有体重差异表明，在普通狨猴中，任何可能的高地位优势都被繁殖成本所抵消。
Captive studies and occasional trappings of wild individuals indicate that callitrichids have small size and body weight and lack sexual dimorphism. We compared body weights of captive and wild Callithrix jacchus obtained by repeatedly weighing subjects from two populations in Brazil. We obtained captive data by routinely weighing 138 individuals from the Universidade Federal do Rio Grande do Norte colony and wild data via regular trapping of 243 individuals in 15 free-ranging groups from IBAMA's field site in Nisia Floresta. We assigned all subjects to one of four age classes-infant, juvenile, subadult, and adult-according to their birth dates or size, reproductive status, and dental development. There is no significant difference between males and females in any of the four age classes, but captive subjects were heavier than wild ones in all age classes but infant. Reproductive and nonreproductive adult females showed no statistical difference in weight. These results accord with previous reports of lack of body size sexual dimorphism in common marmosets and suggest that differences between wild and captive common marmosets are not constitutional, but are instead a consequence of diet and physical activity. The absence of weight difference between reproductive and nonreproductive females suggests that any possible advantage from high rank is outweighed by the costs of reproduction in common marmosets.