The Biology and Systematics of Southeast Asian Voiceless Frogs

东南亚无声蛙的生物学和系统学

• 批准号: 8822630
• 负责人: Sharon Emerson
• 金额: $ 14.75万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8822630&HistoricalAwards=false
• 关键词: Biology; Systematics; Southeast; Asian; Voiceless

Sharon Emerson, at the University of Utah, proposes a multifaceted study of voiceless frogs in the genus Rana that occur in southeast Asia. Emerson's goal is to gain an understanding of the evolution of a suite of secondary sexual characters, associated with the frogs reproductive ecology and breeding behavior (voicelessness), that appears to have evolved on two separate occasions among four species in Borneo. To gain this understanding, Emerson proposes a systematic study of the southeast Asian Ranids based on morphological characters independent of the functional complex of secondary sexual features. Field studies will be conducted in Borneo to determine the details of the breeding biology of the four species and to determine the functional significance of the secondary sexual characters. Assays of blood hormone levels will be made in these species and in other species of Rana to determine the relationship between testosterone levels and the lack of vocal development. Emerson hypothesizes that the evolution of voicelessness may be mediated by the evolution of reduced testosterone levels.

犹他州大学的莎伦·爱默生提出了一个 多方面的研究，在属蛙， 发生在东南亚。爱默生的目标是获得一个 了解一套第二性征的进化 特征，与青蛙的生殖生态和 繁殖行为（无行为），似乎已经进化 在婆罗洲的四个物种中发生了两次不同的事件。获得 基于这种理解，爱默生提出了一个系统的研究， 基于形态特征的东南亚蛙类 独立于第二性征的功能复合体 功能.将在婆罗洲进行实地研究， 四个物种的繁殖生物学细节， 确定第二性征的功能意义 字符.血液激素水平的测定将在这些 物种和其他物种的蛙，以确定 睾丸激素水平和缺乏声音之间的关系 发展爱默生假设， 无意义可能是由减少的 睾丸激素水平