哥伦比亚荒原白尾鹿种群密度和年龄结构的空间变化

Q3 Agricultural and Biological Sciences
Therya Pub Date : 2024-01-30 DOI:10.12933/therya-24-5425
Jennifer Zilenthsjigh Carrillo-Villamizar, Hugo Fernando López-Arévalo
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引用次数: 0

摘要

野生动物种群密度受资源可用性、捕食者和竞争者以及人为压力因素的影响。 对密度及其影响因素的分析对于保护、利用或种群控制非常重要。 根据对密度和种群参数的估计,并结合生态位模型,以往的研究认为,由于捕食者等调节种群数量的因素影响不大,金加扎国家自然公园(NNP)的白尾鹿种群正处于指数增长期。 本研究旨在评估哥伦比亚 Chingaza 国家自然公园白尾鹿的种群密度和年龄结构。 为了评估 Chingaza 国家自然保护区 Monterredondo 和 La Paila 地区白尾鹿的种群密度和年龄结构,共设置了 10 个横断面,每个横断面上都有圆形地块。 我们对这些横断面进行了两次访问;在每次访问中,我们都收集了所有的鹿粪团,测量每个粪团以估算其体积。 采用埃伯哈特和范埃特恩方法以及使用 FSC 和 FAR 技术的半自动 PELLET 程序计算种群密度;通过 k-means 和模糊聚类分析估计年龄结构。利用 FAR 技术,蒙特雷东多的鹿密度估计为 2.09 头/平方公里,拉派拉为 0.94 头/平方公里。 使用 PELLET 技术,蒙特雷东多的密度为 0.37 ± 0.4 ind/km2,拉派拉为 0.16 ± 0.2 ind/km2。 各年龄段(成年、幼年和小鹿)的比例在蒙特雷东多为 1:0.29:0,在拉派拉为 1:0.57:0.04。 Chingaza 国家自然保护区两个区域的白尾鹿种群密度并不均匀,而是呈现出时间和空间上的变化。 与以前在同一地区的研究报告相比,白尾鹿的种群密度有所下降,2004 年的白尾鹿数量最高,主要集中在蒙特雷东多地区。 各年龄段的比例表明种群数量稳定,因为最大比例的个体属于成年阶段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatial Variation of Population Density and Age Structure of White-Tailed Deer (Odocoileus virginianus) in a Colombian Moor
Wildlife population density is affected by resource availability, predators and competitors, and anthropogenic stressors.  Its analysis and the factors affecting it are important for conservation, use, or population control.  Based on estimates of density and population parameters, together with niche modeling, previous studies considered that the white-tailed deer population at the Chingaza National Natural Park (NNP) is undergoing exponential growth due to the marginal influence of factors regulating its abundance, such as predators.  The aim of this study was to evaluate the population density and age structure of the white-tailed deer in the Chingaza NNP, Colombia.  To evaluate the population density and age structure of white-tailed deer in the Monterredondo and La Paila sectors of the Chingaza NNP, 10 transects were installed with circular plots in each.  These were visited twice; in each visit, we collected all deer pellet groups, measuring each pellet to estimate its volume.  Population density was calculated using the Eberhardt and Van Etten method and the semi-automated PELLET procedure using FSC and FAR techniques; the age structure was estimated by k-means and fuzzy clustering analyses. With the FAR technique, the estimated deer density was 2.09 ind/km2 in Monterredondo and 0.94 ind/km2 in La Paila.  With PELLET, these values were 0.37 ± 0.4 ind/km2 for Monterredondo and 0.16 ± 0.2 ind/km2 for La Paila.  The proportion of age classes (adult, juvenile, and fawn) was 1:0.29:0 for Monterredondo and 1:0.57:0.04 for La Paila.  The population density of white-tailed deer in two sectors of the Chingaza NNP is not homogeneous, but shows temporal and spatial variations.  Population density has decreased versus reports from previous studies in this same area, with the highest deer abundance recorded in 2004, mostly in the Monterredondo sector.  The proportion of age classes suggests that the population is stable, as the largest proportion of individuals corresponds to the adult stage
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来源期刊
Therya
Therya Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
1.60
自引率
0.00%
发文量
40
审稿时长
8 weeks
期刊介绍: THERYA aims to disseminate information and original and unpublished knowledge related to the study of mammals in all disciplines of knowledge. It is an open forum for teachers, researchers, professionals and students worldwide in which articles are published in Spanish and English.
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