Estimating red deer abundance in a wide range of management situations in Mediterranean habitats
Estimating red deer abundance in a wide range of management situations in Mediterranean habitats
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DOI：
10.1111/j.1469-7998.2008.00464.x
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发表时间：
2008-09-01
影响因子：
2
通讯作者：
Gortazar, C.
中科院分区：
文献类型：
--
作者：
Acevedo, P.;Ruiz-Fons, F.;Gortazar, C.
当人类干预通过偏爱某些物种来干扰野生动物种群的自然调节时，可能会出现过度繁殖。我们评估了在西班牙南部不同的种群密度范围内估计马鹿数量的不同方法。在22个地点使用距离抽样估计作为参考方法，并与两公里丰度指数(KAI)、四个基于颗粒群计数的指数和两个浏览指数(BWI)进行了比较。通过距离抽样估计的平均马鹿密度为19.51+/-3.19头/100公顷，在研究区范围内(0.04-66.77)表现出很大的变化范围。距离抽样估计与Kais、基于颗粒组的指数和体重指数相关。当在CAIS中使用群体而不是个体时，当滴数中最小颗粒群大小固定在20个颗粒时，以及在BWI中只使用高度适口的物种时，与距离抽样的一致性更好。因此，经过适当修改，几种直接和间接方法可以估计西班牙南部地中海栖息地的马鹿数量。
When human interventions interfere with the natural regulation of wildlife populations by favouring some species, overabundance can emerge. We evaluated different methods of estimating red deer abundance in a wide range of population densities from southern Spain. Distance sampling estimates were used as the reference method across 22 localities and were compared with two kilometric abundance indices (KAIs), four indices based on pellet group counts and two browsing indices (BWIs). The average red deer density estimated by distance sampling was 19.51 +/- 3.19 deer per 100 ha, showing a wide range across the study area (0.04-66.77). Distance sampling estimates correlated with the KAIs, pellet group-based index and the BWI. The agreement with distance sampling improved when groups were used instead of individuals in the KAIs, when the minimum pellet group size was fixed at 20 pellets in the dropping counts, and when only highly palatable species were used in the BWI. Thus, several direct and indirect methods can estimate red deer abundance in Mediterranean habitats from Southern Spain with appropriate modifications.