Dissertation Research: Visual Factors Affecting Mate Choice in Lake Malawi Cichlids

论文研究：影响马拉维湖慈鲷配偶选择的视觉因素

• 批准号: 0104872
• 负责人: Francis Juanes
• 金额: $ 0.5万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0104872&HistoricalAwards=false
• 关键词: Dissertation; Research; Visual; Factors; Affecting

Title: Visual factors affecting mate choice in Lake Malawi cichlidsPI: Francis JuanesDoctoral student: Rebecca JordanThe cichlid fishes of Lake Malawi are an excellent example of rapid species diversification over a relatively short period of evolutionary time. There are numerous theories to explain this diversity that are often linked to sexual selection through female choice. Given that males are brightly colored, females, presumably by using visual cues, choose among the males. In being selective of certain males, females drive the reproductive isolation that lead to species differences. Little, however, has been done to investigate the visual factors used by female Lake Malawi cichlids. In fact very little has been done to discern what type of visual system these fish have, which is particularly surprising given their reliance on visually guided behaviors. The primary objective of this work is to ask four main visual questions with a group of rock dwelling Lake Malawi cichlids (mbuna): (I.) what spectral abilities exist across several groups? (II.) what is the role of visual cues in among species mate choice? (III.) what is the role of ultraviolet radiation in mate choice and feeding, and (IV.) what variation in physical characteristics occur with attenuating light? A critical understanding of the visual factors affecting the Lake Malawi mbuna is a necessary step in understanding of the reproductive isolation see in these fish. This understanding can aid in explaining the extreme diversity seen in these mbuna, and comes at pivotal time because of the anthropogenic stressors that currently threaten the integrity of the East African cichlid fish.

职务名称：影响马拉维湖慈鲷择偶的视觉因素PI：弗朗西斯胡安博士生：丽贝卡乔丹马拉维湖的慈鲷鱼是一个很好的例子，在一个相对较短的进化时间内迅速物种多样化。 有许多理论可以解释这种多样性，这些理论通常与通过女性选择进行的性选择有关。 考虑到雄性的颜色鲜艳，雌性可能会通过视觉线索在雄性中进行选择。 在选择某些雄性的过程中，雌性驱动了导致物种差异的生殖隔离。 很少，但是，已经做了调查的视觉因素所使用的女性马拉维湖慈鲷。 事实上，人们几乎没有做过什么来辨别这些鱼有什么类型的视觉系统，这是特别令人惊讶的，因为它们依赖于视觉引导的行为。 这项工作的主要目标是问四个主要的视觉问题与一组岩石居住马拉维湖慈鲷（mbuna）：（一）。几个群体之间存在什么样的光谱能力？（二）视觉线索在物种择偶中的作用是什么？（三）紫外线辐射在配偶选择和喂养中的作用，以及（IV.）随着光的衰减，物理特性会发生什么变化？ 一个关键的视觉因素影响马拉维湖mbuna的理解是一个必要的步骤，在了解生殖隔离看到这些鱼。 这种理解可以帮助解释在这些mbuna中看到的极端多样性，并且由于目前威胁东非慈鲷鱼完整性的人为压力，在关键时刻到来。