First abundance estimates of Magellanic penguin (Spheniscus magellanicus) colony at Tucker Islet

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Polar Biology Pub Date : 2023-12-27 DOI:10.1007/s00300-023-03215-8
Jorge Acevedo, Claudio A. Moraga, Katherine Gaete, Constanza Aguilar, Ignacio Acevedo-Oyarzo, Manuel Ochoa-Sánchez, Paola Acuña
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Abstract

The nesting site of Magellanic penguins (Spheniscus magellanicus) at Tucker islets (54°09'S; 70°17'W), Chile, is documented and information from the first population abundance estimate on the largest islet during the beginning of chick rearing is provided. Ground-based counts yielded an estimate of 8883 (95% Confidence Intervals: 6653–11,802) burrows; however, counts of active burrows resulted in a total estimate of 2218 (95% Confidence Intervals: 1593–2840) breeding pairs. Based on the estimated total of burrows, this suggests a population decline consistent with trends for other colonies in the Magellan Strait and adjacent waters in Chile. An annual monitoring program to track population changes, breeding success, and chick and egg survival rates is required to assess the species' conservation status of the colony.

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对塔克岛麦哲伦企鹅(Spheniscus magellanicus)繁殖地的首次丰度估计
记录了麦哲伦企鹅(Spheniscus magellanicus)在智利塔克小岛(南纬54°09';西经70°17')的筑巢地点,并提供了在雏鸟开始哺育期间对最大小岛的首次种群丰度估计信息。地面计数得出的洞穴估计数量为 8883 个(95% 置信区间:6653-11802);但对活动洞穴的计数得出的繁殖对总数估计为 2218 对(95% 置信区间:1593-2840)。根据估计的洞穴总数,这表明种群数量在下降,与麦哲伦海峡和智利邻近水域的其他群落的趋势一致。需要开展年度监测计划,跟踪种群变化、繁殖成功率、雏鸟和鸟蛋存活率,以评估该鸟群的物种保护状况。
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来源期刊
Polar Biology
Polar Biology 生物-生态学
CiteScore
3.60
自引率
11.80%
发文量
116
审稿时长
3-8 weeks
期刊介绍: Polar Biology publishes Original Papers, Reviews, and Short Notes and is the focal point for biologists working in polar regions. It is also of interest to scientists working in biology in general, ecology and physiology, as well as in oceanography and climatology related to polar life. Polar Biology presents results of studies in plants, animals, and micro-organisms of marine, limnic and terrestrial habitats in polar and subpolar regions of both hemispheres. Taxonomy/ Biogeography Life History Spatio-temporal Patterns in Abundance and Diversity Ecological Interactions Trophic Ecology Ecophysiology/ Biochemistry of Adaptation Biogeochemical Pathways and Cycles Ecological Models Human Impact/ Climate Change/ Conservation
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