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High abundance and large proportion of medium and large duikers in an intact and unhunted afrotropical protected area: Insights into monitoring methods
African Journal of Ecology ( IF 1 ) Pub Date : 2021-02-08 , DOI: 10.1111/aje.12853
Thomas Breuer 1, 2 , Mireille Breuer‐Ndoundou Hockemba 2, 3 , Cisquet Kiebou Opepa 3 , Sarah Yoga 3 , Franck Barrel Mavinga 3
Affiliation  

Unsustainable hunting of bushmeat has dramatic impacts on ecological processes and people's livelihoods. Unfortunately, there is often a strong controversy regarding the sustainability of duiker hunting due to their continued presence in bushmeat markets, on the one hand, and the predictions of sustainable harvest models for duiker abundance, on the other. This apparent contradiction is largely due to biased low abundance estimates from dung surveys. We present results from a 52.4 km line transect dung survey using site decay rates to estimate duiker densities. In addition, camera trapping (14,995 camera trap-days) was used to provide detection rates and a baseline for the ratio of blue to red duikers as an index of hunting pressure from Nouabalé-Ndoki National Park, with almost zero levels of hunting. Dung surveys revealed high overall duiker densities (totalling 107.4 duikers per km2) and quick dung decay rate. Camera trapping revealed high-duiker detection rates and a high ratio of red to blue duikers. Pristine protected areas and no-hunting zones continue to act as source habitats for high recruitment of harvested species. We discuss future options for monitoring duikers and applying the ratio of red to blue duikers as an index of the level of duiker hunting.

中文翻译:

在完整且未受狩猎的亚热带保护区中,大量的大中型混混物:监测方法的见解

不可持续的食用森林猎物对生态过程和人们的生计产生巨大影响。不幸的是,一方面由于其在丛林肉市场上的持续存在,另一方面,由于对杜克狩猎活动的可持续性,人们经常争论激烈,另一方面,对杜克丰富度可持续收获模式的预测也是如此。这种明显的矛盾在很大程度上是由于粪便调查估计的低丰度估计值有偏差。我们提供了一个52.4公里的线样粪便调查的结果,该调查使用了站点衰减率来估计duiker密度。此外,相机捕获(14,995个相机捕获天)用于提供检测率和蓝色与红色杜克犬比率的基线,作为努瓦巴莱-恩多基国家公园狩猎压力的指标,狩猎水平几乎为零。2)和快速的粪便衰减率。相机陷印显示出侦查人员的侦查率很高,红色与蓝色侦查器的比率很高。原始的保护区和禁猎区继续充当着大量收集已采集物种的原始栖息地。我们讨论了监视侦听器并将红色与蓝色侦听器的比率作为侦听器狩猎水平的指标的未来选择。
更新日期:2021-02-08
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