Intraspecific diversity and conservation biology of fishes

我的研究计划使用各种方法来研究淡水和海洋鱼类的种内生物多样性，特别是那些发生在加拿大大西洋。我们使用线粒体DNA的DNA测序来了解多样性的历史组成部分-例如，将当代人口追溯到他们在冰河时代占据的冰川避难所。我们研究更快速进化的序列，称为微卫星，以测量物种现在分裂成种群的程度，种群之间有多少混合或扩散，并确定种群内存在多少遗传变异。我们研究鱼类的特定基因，以确定它们是否表现出局部适应性。我们研究身体形态，以研究种群在生态适应方面的差异。我们使用普通的花园实验来测试当地鱼类种群是否在适应方面表现出差异，例如，在它们承受酸性（低pH值）等常见环境压力的能力方面，以及测试种群内近亲繁殖的数量是否影响鱼类耐受低pH值等压力的能力。湖白鲑、白鲑和美洲鲱鱼。

My research program uses a variety of methods to examine the intraspecific biodiversity of freshwater and marine fishes, especially those that occur in Atlantic Canada. We use DNA sequencing of mitochondrial DNA to learn about historical components of diversity - for example, to trace contemporary populations back to the glacial refugia they occupied during the ice ages. We study more rapidly evolving sequences, called microsatellites, to measure the extent to which species are split into populations now, how much mixing or dispersal goes on between populations, and to determine how much genetic variation exists within populations. We study particular genes in fishes to determine if they show local adaptations. We study body morphology to examine how populations differ in their ecological adaptations. We use common garden experiments to test whether local populations of fishes show differences in their adaptations, for example, in their ability to withstand common environmental stresses such as acidity (low pH), and also to test whether the amount of inbreeding within populations affects the ability of fish to tolerate stresses such as low pH. We study a variety of fish species, including but not limited to rainbow smelt, lake whitefish, wolffishes, and American shad.