Fallow deer and wild boar pellet group disappearance in a mediterranean area
Fallow deer and wild boar pellet group disappearance in a mediterranean area
复制标题
地中海地区小鹿和野猪颗粒群消失
DOI：
10.2307/3802561
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发表时间：
1998
影响因子：
2.3
通讯作者：
P. Genov
中科院分区：
文献类型：
--
作者：
G. Massei;P. Bacon;P. Genov
有关当地人口密度的信息是必不可少的管理有蹄类动物，往往是通过颗粒组计数。估计颗粒组消失率对于该方法的可靠性至关重要。然而，没有研究已经在地中海气候的颗粒组消失率，并没有定量信息的野猪（猪）和休闲鹿（Dama dama）的颗粒组的损失。我们调查了在地中海沿岸地区的野猪和休闲鹿颗粒群的消失率，并评估了可能的相关因素的影响。每个季节，每种30个新鲜颗粒组沉积在4个栖息地类型的每一个，并记录其消失率放置后的第一周和此后每3周。颗粒组损失的变化与季节比栖息地，并遵循类似的模式在有蹄类动物。颗粒组在冬季持续时间最长：至少99%的休闲鹿和100%的野猪颗粒组仍然存在1个月后沉积，和78%的两个物种的颗粒组仍然存在3个月后沉积。相反，消失率在秋季急剧增加，特别是对休闲鹿：88%的休闲鹿和5%的野猪颗粒组消失后1个月沉积。粪甲虫（Geotrupes，Aphodius）和野猪的生根活动影响颗粒群的消失率。在地中海地区，颗粒组计数应在冬季进行，颗粒组计数应在1个月内进行，以优化方法的可靠性。
Information about local population densities is essential to manage ungulates and is often obtained by pellet group counts. Estimating the rate of pellet group disappearance is critical for the reliability of this method. However, no studies have been performed on pellet group disappearance rates in Mediterranean climate, and no quantitative information is available on loss of pellet groups of wild boar (Sus scrofa) and fallow deer (Dama dama). We investigated disappearance rate of wild boar and fallow deer pellet groups in a coastal Mediterranean area and assessed the influence of possible correlates. Every season, 30 fresh pellet groups per species were deposited in each of 4 habitat types, and their disappearance rate was recorded the first week after placement and every 3 weeks thereafter. Pellet group loss varied more in relation to season than to habitat and followed a similar pattern in both ungulates. Pellet groups persisted longest in winter: at least 99% of fallow deer and 100% of wild boar pellet groups were still present 1 month after deposition, and 78% of pellet groups of both species had remained 3 months after deposition. Conversely, the disappearance rate increased dramatically in autumn, particularly for fallow deer: 88% of fallow deer and 5% of wild boar pellet groups disappeared 1 month after deposition. Dung beetles (Geotrupes, Aphodius) and rooting activity bf wild boar influenced disappearance rate of pellet groups. In Mediterranean regions, pellet group counts should be performed during winter, and pellet groups should be counted in a 1-month period to optimize the reliability of the method.