A Female-Centered Evaluation of Growth, Survival, Reproduction, and Demography in the Salamander Desmognathus quadramaculatus

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-08-10 DOI:10.1643/h2021127

R. Bruce

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引用次数: 2

Abstract

In the present report, I evaluate life history and demography for two populations of the Black-bellied Salamander, Desmognathus quadramaculatus, in the Cowee and Nantahala Mountains, North Carolina, using published data on growth of females, fecundity, and larval growth and development to generate life tables and metabolic life histories for each population. I assumed that females in these populations reproduce biennially, beginning at ages 7–8 years and 8–10 years in Cowee and Nantahala populations, respectively. In deriving life tables, I posited stationary populations wherein net reproductive rate (R0) equaled 1.0 and population growth rate (r) equaled 0. Fecundity (mx column of the life table) was based on counts of ovarian follicles in gravid females. Survival values (lx column of the life table) were generated by an iterative process that yielded a value of R0 = 1.0. I projected the life spans in each population to 25 years. The demographic models developed by the procedure allowed comparison with those reported earlier for D. monticola and D. ocoee. Age at first reproduction and generation time are key contributors to variation in body size and life history in Desmognathus.

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以雌性为中心的菱角蝾螈生长、生存、繁殖和种群特征评价

在本报告中，我评估了两个黑腹蝾螈种群的生活史和人口统计，Desmognathus quadramaculatus，在Cowee和Nantahala山脉，北卡罗来纳州，使用已发表的数据，雌性的生长，繁殖力，幼虫的生长和发育，生成生命表和每个种群的代谢生活史。我假设这些种群中的雌性每两年繁殖一次，在Cowee和Nantahala种群中分别从7-8岁和8-10岁开始。在推导生命表时，我假设固定种群，其中净繁殖率(R0)等于1.0，种群增长率(r)等于0。生殖力(生命表的mx栏)是基于怀孕女性卵巢卵泡的计数。生存值(生命表的lx列)通过迭代过程生成，其值为R0 = 1.0。我预测每个人口的寿命为25年。该程序开发的人口统计学模型可以与先前报道的D. monticola和D. ocoee进行比较。第一次繁殖的年龄和世代时间是猫爪草体型和生活史变化的关键因素。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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