Life history variation in native and non-native fishes

本地和非本地鱼类的生活史差异

• 批准号: 46680-2007
• 负责人: Fox, Michael
• 金额: $ 2.03万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363487
• 关键词: Life; history; variation; native; non

My research will focus on the life history and morphological characteristics of two invasive species, the pumpkinseed sunfish and the round goby. I will determine whether introduced populations show particular adaptations in non-native environments, whether such differences can be related to the physical or biological environment, and if they have become part of the genetic makeup of these introduced populations.The pumpkinseed was introduced in Europe in the late 1800's, and is considered invasive throughout much of southern Europe.  I will study its reproduction, morphology and genetics across the native and introduced range to identify major differences between native and non-native populations.  I will also conduct experiments with pumpkinseeds of different origins reared in a common environment in order to explain the differences observed in nature. The round goby is recent Eurasian invader that has become a serious problem in Canada. I will compare population and reproductive attributes of gobies where they are well established with those at the edge of their expanding range to determine whether this fish succeeds by changing its life history strategy as it becomes more established. I will determine whether range expansion occurs mainly through the migration of juveniles or adults.The proposed pumpkinseed research builds upon 17 years of life history investigations on native and introduced populations, and provides a unique opportunity to explain why aquatic species are successful invaders in some regions and not in others. The goby research would fill in a major gap in our knowledge of the species in its non-native range, and could explain how invasive populations respond to opportunities for expansion.

我的研究将集中于两种入侵物种的生活史和形态特征：南瓜籽翻车鱼和圆虾虎鱼。我将确定引入的种群是否在非本地环境中表现出特殊的适应能力，这些差异是否与物理或生物环境有关，以及它们是否已成为这些引入种群的基因构成的一部分。南瓜籽于 1800 年代后期引入欧洲，在整个南欧大部分地区被认为是入侵性的。  我将研究其在本地和引进范围内的繁殖、形态和遗传学，以确定本地和非本地种群之间的主要差异。  我还将用在同一环境中培育的不同来源的南瓜籽进行实验，以解释在自然界中观察到的差异。圆虾虎鱼是最近的欧亚入侵者，已成为加拿大的一个严重问题。我将比较已经成熟的虾虎鱼和处于其扩大范围边缘的虾虎鱼的种群和繁殖属性，以确定这种鱼是否通过随着其变得更加成熟而改变其生活史策略而取得成功。我将确定范围扩张是否主要通过幼鱼或成鱼的迁徙而发生。拟议的南瓜籽研究建立在对本地和引进种群 17 年生活史调查的基础上，并提供了一个独特的机会来解释为什么水生物种在某些地区是成功的入侵者，而在其他地区则不然。虾虎鱼的研究将填补我们对该物种在非本地范围内的了解的一个重大空白，并可以解释入侵种群如何应对扩张的机会。