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Restocking of salmonids - opportunities and limitations

机译：鲑鱼补给-机会和局限性

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摘要

Stocking can be a cost effective method of enhancing salmonid populations, in particular where the aim is to restore populations or mitigate against developments. There are risks associated with any intervention and it is suggested that all stockings undergo risk screening in order to identify the high risk areas. The main concern regarding stocking relates to the impact on the genetic fitness of the wild population, and proposals to minimise the impact while still maintaining a fishery are made. To ensure that the greatest benefit from a stocking programme is realised, stocking rates should be optimal for the type of habitat being stocked. How this can be determined is presented together with guidelines for stocking different types of habitat. Benefit, in terms of cost of adult return or per adult fish caught, enables comparisons to be made with other management options. Information on survival rates of wild and hatchery-reared fish, unit cost of production and the economic value of fish and fishing is summarised enabling simple estimates of cost: benefit to be determined.
机译：放养可以是增加鲑鱼种群数量的一种经济有效的方法，特别是在旨在恢复种群数量或减轻种群发展的情况下。任何干预措施都有风险，建议对所有长袜进行风险筛查，以识别高风险区域。与放养有关的主要问题涉及对野生种群遗传适应的影响，并提出了在保持渔业的同时尽量减少影响的建议。为了确保从放养计划中获得最大收益，放养率应针对所放养的栖息地类型为最佳。与如何放养不同类型的栖息地的指南一起介绍了如何确定这一点。就成年返回成本或每条成年鱼类捕获成本而言，收益使得能够与其他管理方案进行比较。概述了有关野生和孵化场养鱼的存活率，单位生产成本以及鱼和渔业经济价值的信息，从而可以简单估算成本：确定收益。

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