An Experimental Evaluation of Two Trout Strain Crosses

MASTERS THESIS: By crossing various inbred, conspecific strains (of fish), there is the possibility that some progeny will show increased survival and will remain readily catchable. As part of a program to evaluate the quality of such hatchery crosses, three laboratory exsperiments and one field study were undertaken to assess some of the various vigor qualities which may contribute to the subsistence and perpetuation of the fish after planting. The main factors considered in formulating these experiments were those of feasibility and ecological significance. The separate experiments all compared the same strains on a relative basis with the parental strains. Substrate preference, stamina, predation response, and angler yield were ultimately chosen as criteria to evaluate the relative fitness and management potential of the crossbred strains. (Includes a literature review)硕士学位论文：通过对不同近交的同种鱼类品系进行杂交，部分子代有可能表现出更高的存活率，且仍易于被垂钓捕获。作为评估此类孵化场杂交子代品质项目的一部分，本研究开展了三项实验室实验与一项野外调查，以评估可能影响放流后鱼类生存与延续的各类活力性状。设计本系列实验时主要考量的因素为实验可行性与生态学意义。各独立实验均以亲本品系为参照，对相同杂交子代品系进行相对性能比较。最终选取底质选择偏好、运动耐力、捕食响应能力与垂钓捕获率作为评估杂交品系相对适合度与放流管理潜力的指标。（本研究包含文献综述部分）