Reproductive Biology and Population Structure of Eurycea chamberlaini in North Carolina

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-11-09 DOI:10.1643/h2021085

J. Davenport, David A Beamer, Cody L. Long, J. Waltz, Shelby A. Wren, D. Siegel

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Abstract

Eurycea chamberlaini (Chamberlain's Dwarf Salamander) is a small spelerpine salamander with scant reproductive and life-history data available. Therefore, the objectives of our study were to examine the reproductive life history and population structure of E. chamberlaini from a North Carolina population. From February 2008 to February 2009, monthly collections were made in Craven County, North Carolina. All specimens (n = 392) were histologically examined for reproductive life history and population characteristics by month. Overall, male and female E. chamberlaini follow a reproductive cycle similar to other spelerpine species with sperm in the Wolffian ducts of specimens from September to February; however, spermatidogenesis was delayed until August and September with the presence of mature sperm in testes from August through November. We captured 201 female salamanders of which 36 were considered immature. We caught 191 males of which 27 were considered immature. The mean snout–vent length (SVL±1 SD) of mature females (27.13±2.33 mm) and males (25.84±2.03 mm) was statistically different from one another. Females tended to be larger than males from our monthly samples, with a greater proportion of the largest specimens being female. Overall, population structure of E. chamblerlaini appears similar to other coastal plain salamander species.

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北卡罗来纳州张氏Eurycea chamberlaini的繁殖生物学和种群结构

张伯伦矮蝾螈(Eurycea chamberlaini)是一种小型的石斑蝾螈，缺乏生殖和生活史数据。因此，我们的研究目的是研究北卡罗莱纳张伯伦种群的生殖生活史和种群结构。从2008年2月到2009年2月，每月在北卡罗来纳州Craven县进行收集。所有标本(n = 392)按月进行生殖生活史和种群特征组织学检查。总体而言，雄性和雌性张氏石的生殖周期与其他尖石物种相似，精子从9月到2月在标本的沃尔夫管中;然而，精子发生被推迟到8月和9月，从8月到11月，睾丸中存在成熟精子。我们捕获了201只雌性蝾螈，其中36只被认为是未成熟的。我们捕获了191只雄性，其中27只被认为是不成熟的。成年雌性(27.13±2.33 mm)和雄性(25.84±2.03 mm)的平均口鼻长度(SVL±1 SD)差异有统计学意义。从我们每月的样本中，雌性往往比雄性大，最大的标本中雌性的比例更大。总体而言，尚伯莱蝾螈种群结构与其他沿海平原蝾螈物种相似。

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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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