Evolution of Somatic Growth Rate in Fishes: What are the Trade-offs?

P.I.：Conover，David Proposal#：95-30209 Proposal摘要遗传变异和局部适应可能是鱼类和其他生物之间体细胞生长的许多差异的原因。该项目以一种海洋鱼类(大西洋银鱼)作为模型系统，旨在测试影响生长速度进化的选择性因素。具体地说，使用实验室的银鱼种群进行的实验将比较：1)不同温度下繁殖产量、生长和存活率的大小依赖关系；2)游泳性能和在摄入最大摄食量之前和之后立即被捕食的脆弱性；以及3)最大和补偿生长的差异。此外，生物能量模型将被用来模拟不同环境下移植基因对体型的影响。

P.I.: CONOVER, DAVID Proposal #: 95- 30209 PROPOSAL ABSTRACT Genetic variation and local adaptation may be responsible for many of the differences in somatic growth noted among fishes and other organisms. Using a marine fish (the Atlantic silverside Menidia menidia) as a model system, this project proposes to test selective factors that affect the evolution of growth rate. Specifically, experiments using laboratory stocks of silversides will compare: 1) the size-dependency of reproductive output, growth, and survival at different temperatures, 2) swimming performance and vulnerability to predation before and immediately after consuming maximum rations; and 3) the variance in maximal and compensatory growth. Additionally, bioenergetic models will be used to simulate the effect on body size of transplanting genotypes across environments