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【6h】Ecology and demography of golden-headed lion tamarins (Leontopithecus chrysomelas) in Cabruca agroforest, Bahia State, Brazil.

机译巴西巴伊亚州卡布鲁卡(Cabruca)农林的金头狮子绢毛猴(Leontopithecus chrysomelas)生态学和人口统计学。

【摘要】Understanding how species use the matrix of habitat that surrounds forest fragments can contribute to conservation strategies in fragmented landscapes. In this dissertation, I evaluate the effects of habitat structure and resource availability on group characteristics, use of space, and predation risk for the endangered golden-headed-lion tamarins in shaded cocoa plantations locally known as cabruca agroforest. In the first chapter I present a list of tree species that provide key foods and sleeping sites used by lion tamarins. Families Myrtaceae and Sapotaceae are the most commonly used by lion tamarins for both food and sleeping sites. Fifty-five tree species were ranked as extremely valuable for the tamarins. Cabruca management that retains the species listed in this study may improve the long-term survival of lion tamarins. In the second chapter, I compare ecological and demographic data of lion tamarins in cabruca and other vegetation types. In contrast with my prediction that food resources would be scarce in cabruca, the exotic and invasive jackfruit ( Artocarpus heterophyllus) was an abundant food resource for tamarins in cabruca while bromeliads were the favorite substrate for animal prey foraging. Group size and composition were similar in all vegetation types. Males in cabruca were heavier than those in primary forest. Density of lion tamarins in cabruca was the highest and home range size the smallest reported for the species. This is the first study to show that lion tamarins can live and reproduce exclusively in cabruca and has important implications for conservation of the species. In my third chapter, I test two hypotheses explaining the association between lion tamarins and Wied.s marmoset (Callithrix kuhlii): foraging benefits and predation avoidance. I found no evidence to support the hypothesis that interspecific associations provide foraging benefits for lion tamarins. However, several findings support the predation avoidance hypothesis: associations occurred in areas where predation risk was higher, and during the part of the day in which predation risk was highest, and following birth events when the tamarins were more susceptible to predation. Despite the importance of cabruca to lion tamarins, they are more exposed to predation in this habitat.

【摘要机译】了解物种如何利用围绕森林碎片的生境矩阵可以有助于在破碎的景观中实施保护策略。在这篇论文中,我评估了栖息地结构和资源的可获得性对当地被称为cabruca农林的阴凉可可种植园中濒临灭绝的金头狮子猴的群体特征,空间利用和捕食风险的影响。在第一章中,我列出了一些树种,这些树种提供了狮子猴所使用的主要食物和睡眠场所。狮猴最常将桃金娘科和桔梗科用作食物和睡眠场所。 55种树种被认为对绢毛猴非常有价值。保留本研究中所列物种的卡布鲁卡管理可能会改善狮子绢毛猴的长期生存。在第二章中,我比较了卡布鲁卡和其他植被类型中狮子罗望子的生态和人口统计数据。与我的预测相反,蜡梅缺乏食物资源,异国和入侵的菠萝蜜(Artocarpus heterophyllus)是蜡梅中绢毛猴的丰富食物资源,而凤梨则是动物猎物觅食的首选基质。在所有植被类型中,种群大小和组成均相似。卡布鲁卡的雄性比原始森林中的重。据报道,卡布鲁卡地区的狮猴的密度最高,而家养范围最小。这是第一个表明狮子绢毛猴可以在cabruca中生活和繁殖的研究,这对保护该物种具有重要意义。在我的第三章中,我测试了两个假设,它们解释了狮子绢毛猴和Wied.s mo猴(Callithrix kuhlii)之间的联系:觅食效益和避免掠食行为。我发现没有证据支持种间协会为狮子猴提供觅食益处的假说。但是,有一些发现支持避免捕食假说:在掠食风险较高的地区,在捕食风险最高的一天中的部分时间以及在绢毛猴更容易被捕食的出生事件之后发生关联。尽管cabruca对狮子绢毛猴很重要,但它们在该生境中更容易被捕食。

【作者】Oliveira, Leonardo de Carvalho.;

【作者单位】University of Maryland, College Park.;

【年(卷),期】2010(),

【年度】2010

【页码】147 p.

【总页数】147

【原文格式】PDF

【正文语种】eng

【中图分类】;

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