Implications of faecal removal by dung beetles for scat surveys in a fragmented landscape of the Brazilian Amazon
Implications of faecal removal by dung beetles for scat surveys in a fragmented landscape of the Brazilian Amazon
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DOI：
10.1017/s0030605309990809
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发表时间：
2010-07-01
期刊：
影响因子：
2.7
通讯作者：
Michalski, Fernanda
中科院分区：
文献类型：
--
作者：
Norris, Darren;Michalski, Fernanda
监测稀有和难以捉摸的物种以进行有效的管理和保护尤其具有挑战性，并且通常需要开发专门的技术。粪便调查已用于监测各种稀有物种，但对适当抽样设计的开发却相对较少关注。为了确定粪便调查是否可用于比较巴西亚马逊支离破碎地区三个栖息地的物种分布，对森林、河岸廊道和牧场栖息地中人类（n=27）和美洲虎（n=27）粪便样本的清除进行了 24 小时记录。粪甲虫清除了大部分样本（71%），广义线性混合效应模型揭示了栖息地和粪便类型对清除概率的显着影响，与牧场栖息地的样本相比，森林和河岸走廊的清除率更高。尽管非侵入性粪便调查有可能解决基本的大范围保护和管理问题，但我们的结果表明，热带地区的粪便调查必须考虑栖息地和目标物种之间粪便清除率的差异，然后才能得出有关栖息地利用模式的结论。
Monitoring rare and elusive species for effective management and conservation is particularly challenging and often demands the development of specialized techniques. Scat surveys have been applied to monitor a variety of rare species but relatively little attention has been given to the development of appropriate sampling designs. To determine if scat surveys could be applied to compare the distribution of species across three habitats of a fragmented region in the Brazilian Amazon, the removal of human (n=27) and jaguar (n=27) scat samples in forest, riparian corridor and pasture habitats was recorded for 24 hours. Dung beetles were responsible for removing the majority of samples (71%) and a generalized linear mixed effect model revealed significant influence of habitat and scat type on removal probability, with forest and riparian corridors having higher removal compared with samples in pasture habitats. Although non-invasive scat surveys can potentially address fundamental broad-scale conservation and management questions, our results demonstrate that scat surveys in the tropics must account for differences in scat removal rates between habitats and target species before conclusions can be drawn regarding patterns of habitat use.