Effects of dehorning on population productivity in four Namibia sub-populations of black rhinoceros (Diceros bicornis bicornis).
Effects of dehorning on population productivity in four Namibia sub-populations of black rhinoceros (Diceros bicornis bicornis).
复制标题
DOI：
10.1007/s10344-022-01607-5
复制
发表时间：
2022
影响因子：
2
通讯作者：
中科院分区：
文献类型：
--
作者：
黑犀牛（犀牛）（Diceros bicornis）是极度濒危物种，偷猎是对该物种生存的几个威胁之一。包括纳米比亚、南非和津巴布韦在内的几个国家的许多保护区现在都在切除犀牛的角，试图减少偷猎。纳米比亚环境、林业和旅游部和拯救犀牛信托基金会收集的历史数据被用于调查去角是否对首次繁殖年龄（AFR）、产犊间隔（ICI）、出生性别比、小牛存活率、死亡原因和寿命有影响。这些是在四个纳米比亚黑犀牛亚种群（以下简称“种群”）中进行的评估（分别表示为A、B、C和D），它们经历了不同程度的去角。在无角个体和有角个体之间，没有发现任何变量的显著差异。种群是AFR （LRT = 7.433, p = 0.024）和ICI （LRT = 13.281, p = 0.004）的显著预测因子，尽管两组比较仅发现种群a和种群B存在显著差异（AFR: z = - 2.736, p = 0.017, ICI: z = - 3.705, p = 0.001）。另外，种群D中男性出生数显著高于女性出生数（p = 0.021, CI = 0.544, 0.960）。无角个体和有角个体被偷猎的比例差异无统计学意义（X2 = 0.638, p = 0.424, n = 265），但所有个体的主要死亡原因是偷猎。没有证据表明去角对黑犀牛的AFR、ICI、出生性别比、幼崽存活率或寿命有任何影响，这让人们对继续使用去角作为该物种的反偷猎技术感到放心。
The black rhinoceros (rhino) (Diceros bicornis) is critically endangered, with poaching being one of several threats to the species’ survival. Many reserves across several countries, including Namibia, South Africa, and Zimbabwe, now dehorn their rhinos in an attempt to reduce poaching. Historical data collected by the Namibian Ministry of Environment, Forestry, and Tourism and Save the Rhino Trust were used to investigate whether dehorning has an effect on age at first reproduction (AFR), inter-calving interval (ICI), birth sex ratios, calf survival, cause of death, and lifespan. These were assessed in four Namibian sub-populations (hereafter referred to as ‘populations’) of black rhino (denoted A, B, C, and D) which have undergone varying levels of dehorning. No significant difference was found in any of the variables between dehorned and horned individuals. Population was a significant predictor of AFR (LRT = 7.433, p = 0.024) and ICI (LRT = 13.281, p = 0.004), although pairwise comparisons only found populations A and B to be significantly different (AFR: z = −2.736, p = 0.017, ICI: z = −3.705, p = 0.001). Additionally, a significantly higher number of males than females were born in population D (p = 0.021, CI = 0.544, 0.960). The main cause of death across all individuals was poaching, although there was no significant difference in the proportion of rhinos poached between dehorned and horned individuals (X2 = 0.638, p = 0.424, n = 265). No evidence was found to suggest that dehorning has any effect on AFR, ICI, birth sex ratios, calf survival, or lifespan in the black rhino, which is reassuring in the continued use of dehorning as an anti-poaching technique in this species.
登录
查看更多内容
影响因子：
3.4
作者：
Brodie, J. F.;Muntifering, J.;du Preez, P.
通讯作者：
du Preez, P.
DOI：
10.1098/rstb.2009.0140
发表时间：
2009-11-27
影响因子：
6.3
作者：
Bronson, F. H.
通讯作者：
Bronson, F. H.
影响因子：
--
作者：
Berkeley, Elizabeth V.;Linklater, Wayne L.
通讯作者：
Linklater, Wayne L.
影响因子：
3.7
作者：
Ferreira SM;Greaver C;Knight GA;Knight MH;Smit IP;Pienaar D
通讯作者：
Pienaar D
影响因子：
3.7
作者：
F Millán M;Carranza J;Pérez-González J;Valencia J;Torres-Porras J;Seoane JM;de la Peña E;Alarcos S;Sánchez-Prieto CB;Castillo L;Flores A;Membrillo A
通讯作者：
Membrillo A