Fragmented forest affects the southern black-horned capuchin (Sapajus nigritus cucullatus) in the Argentinean Atlantic Forest.

IF 1.3 4区 生物学 Q2 ZOOLOGY
Primates Pub Date : 2024-03-01 Epub Date: 2024-01-18 DOI:10.1007/s10329-023-01114-4
Victoria Martinez de Zorzi, Sam Shanee, Luciana Inés Oklander
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Abstract

The southern black-horned capuchin, Sapajus nigritus cucullatus, is considered Near Threatened on the IUCN Red List and Vulnerable in Argentina. The species is mainly threatened by habitat loss and fragmentation. The aim of this study was to compare range size, group size, and density in S. n. cucullatus groups between areas of continuous and fragmented habitat in the Atlantic Forest in Argentina. The study was carried out in two areas in northern Misiones province, one continuous and one anthropogenic fragment. Fieldwork was carried out for 5 days each month from November 2019 to March 2020 and from November 2020 to March 2021. SARS-CoV-2 restrictions meant we could not survey in the intervening period. Group counts were made on existing trails and subsequent group follows. We georeferenced encounters and follows to estimate home range sizes. We calculated density based on home range modeling using 100% minimum convex polygons (MCP), and compared these using generalized linear models (GLM). Smaller groups and lower density of S. n. cucullatus were found in continuous forest, with group sizes between 12 and 23 individuals, and density of 0.14 ind/ha, whereas in the fragmented forest, group sizes were between 32 and 36, with density of 0.62 ind/ha (n = 107; zero-inflated negative binomial regression [ZINB], p < 0.05). The higher density in forest fragments may be due to reduced dispersal ability. This work highlights data on species plasticity that could contribute to the development of conservation management strategies for S. n. cucullatus and its habitat.

Abstract Image

森林破碎化对阿根廷大西洋森林中南方黑角卷尾猴(Sapajus nigritus cucullatus)的影响。
南方黑角卷尾猴(Sapajus nigritus cucullatus)在《世界自然保护联盟红色名录》中被视为 "近危 "物种,在阿根廷则被视为 "易危 "物种。该物种主要受到栖息地丧失和破碎化的威胁。本研究的目的是比较阿根廷大西洋森林中连续栖息地和破碎化栖息地之间 S. n. cucullatus 群体的分布范围、群体大小和密度。研究在米西奥内斯省北部的两个地区进行,一个是连续生境,一个是人为破碎生境。从 2019 年 11 月到 2020 年 3 月,以及从 2020 年 11 月到 2021 年 3 月,实地考察每月进行 5 天。由于 SARS-CoV-2 的限制,我们无法在此期间进行调查。我们对现有路径和随后跟进的群体进行了计数。我们对相遇和跟随进行了地理坐标定位,以估算家园范围的大小。我们使用 100% 最小凸多边形 (MCP) 根据家园范围模型计算密度,并使用广义线性模型 (GLM) 进行比较。在连续的森林中,S. n. cucullatus的群体较小,密度较低,群体大小在12到23只之间,密度为0.14 ind/ha,而在破碎的森林中,群体大小在32到36只之间,密度为0.62 ind/ha(n = 107;零膨胀负二项回归[ZINB],p = 0.01)。
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来源期刊
Primates
Primates 生物-动物学
CiteScore
3.10
自引率
17.60%
发文量
71
审稿时长
>12 weeks
期刊介绍: Primates is an international journal of primatology whose aim is to provide a forum for the elucidation of all aspects of primates. The oldest primatological journal, Primates publishes original papers that advance the scientific study of primates, and its scope embraces work in diverse fields covering biological bases of behavior, socio-ecology, learning and cognition, social processes, systematics, evolution, and medicine. Contributions relevant to conservation of natural populations and welfare of captive primates are welcome. Studies focusing on nonprimate species may be considered if their relevance to primatology is clear. Original Articles as well as Review Articles, News and Perspectives, and Book Reviews are included. All manuscripts received are initially screened for suitability by members of the Editorial Board, taking into account style and ethical issues, leading to a swift decision about whether to send the manuscript for external review.
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