Among-population variation in monthly and annual survival of the Baja California Tree Frog, Pseudacris hypochondriaca curta, in desert oases of Baja California Sur, Mexico

IF 0.8 4区生物学 Q3 ZOOLOGY

Herpetological Conservation and Biology Pub Date : 2015-06-14 DOI:10.5167/UZH-111197

V. Luja, R. Rodríguez-Estrella, M. Schaub, B. R. Schmidt

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引用次数: 5

Abstract

Survival is an important component of the demography of an animal. We estimated monthly and annual survival probabilities of three populations of the Baja California Treefrog (Pseudacris hypochondriaca curta) inhabiting desert oases of Baja California Sur, Mexico. We used data from a two-year mark recapture study to estimate survival. Recapture probabilities varied widely among months and there was no clear temporal pattern underlying the fluctuations. Annual survival was 27 and 29% for two populations and 1% for the third population. This implies that the populations, particularly the third one, can persist only if there is steady and high recruitment. With annual survival as low as 1–29%, a lack of recruitment could quickly cause local extinction. Because immigration seems unlikely in these populations due to their isolation from other breeding populations, recruits must be produced locally. Non-native fish, crayfish, and frogs that prey on tadpoles may therefore be a threat for the persistence of the populations.

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墨西哥下加利福尼亚南部沙漠绿洲中下加利福尼亚树蛙月活和年活的种群变异

生存是动物种群统计的一个重要组成部分。本文对生活在墨西哥下加利福尼亚南部沙漠绿洲的下加利福尼亚树蛙(Pseudacris hypochondriaca curta)三个种群的月生存率和年生存率进行了估算。我们使用了一项为期两年的标记再捕获研究的数据来估计生存率。在不同的月份中，重新捕获的概率差别很大，波动背后没有明确的时间模式。两个种群的年生存率分别为27%和29%，第三个种群的年生存率为1%。这意味着人口，特别是第三人口，只有在稳定和高招募的情况下才能维持下去。由于年存活率低至1-29%，缺乏补充可能很快导致当地灭绝。由于这些种群与其他繁殖种群的隔离，移民似乎不太可能在这些种群中出现，因此必须在当地生产新兵。因此，以蝌蚪为食的非本地鱼类、小龙虾和青蛙可能对种群的持久性构成威胁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Herpetological Conservation and Biology Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

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