Native fish stocking of rivers: discriminating between hatchery-reared and wild fish

放养鱼类被广泛用于试图恢复当地鱼类种群。关于放养的鱼的命运或放养对居民种群的影响，人们知之甚少。我们将制定和评估孵化养殖鱼类耳石的化学标记方案，以便确定其来源。将进行孵化场养殖鱼类的试验性放养，并在有放养和未放养的河流中确定种群结构和放养与野生鱼的来源。天然化学特征也将有助于确定重要的招募领域。结果将使渔业管理者能够在知情的情况下作出关于放养战略的决定。

Stocking of fish is widely used in attempts to restore native fish populations. Little is known of the fate of stocked fish or the effects of stocking on resident populations. We will develop and evaluate protocols for chemical marking of otoliths of hatchery-reared fish so that their source can be determined. Experimental stocking of hatchery-reared fish will be undertaken and population structure and source of stocked versus wild fish determined in stocked and unstocked rivers. Natural chemical signatures will also help determine important recruitment areas. The outcomes will allow fisheries managers to make informed decisions regarding stocking strategies.