The restoration of threatened species involves understanding multiple aspects of the life history and ecology of the target species. One important consideration in the restoration of threatened species is feeding ecology. We examined the summer diet of reintroduced juvenile lake sturgeon (Acipenser fulvescens) in the Genesee (n = 119, ages 1 and 2) and the St. Regis rivers (n = 40, ages 1, 2, 5, 6, and 7) of New York State, USA, in the summer of 2005. The most common taxa consumed were Diptera (88% of prey biomass) in the Genesee River and Ephemeroptera (35% of prey biomass) and Diptera (29%) in the St. Regis River. Diptera: (Chironomidae) was the major prey taxon in both benthic communities. Selectivity analysis showed a positive selection of Diptera by Genesee River lake sturgeon and an avoidance of Diptera by St. Regis River lake sturgeon. The St. Regis River lake sturgeon showed avoidance of Coleoptera, but positive selection of Ephemeroptera, Trichoptera, and Oligochaeta. Results indicate that the reintroduced juvenile lake sturgeon are growing and successfully finding prey in these two rivers and appear to actively select specific prey types.

中文翻译：

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幼年湖鲟夏季饮食重新引入美国纽约杰纳西河和瑞吉斯河

受威胁物种的恢复涉及了解目标物种的生活史和生态的多个方面。恢复受威胁物种的一个重要考虑因素是饲养生态。我们检查了在 Genesee（n  = 119，1 岁和 2 岁）和 St. Regis 河流（n）中重新引入的幼年湖鲟（Acipenser fulvescens）的夏季饮食 = 40，2005 年夏天美国纽约州的 1、2、5、6 和 7 岁。最常见的消费类群是杰纳西河中的双翅目（占猎物生物量的 88%）和蜉蝣目（35 % 的猎物生物量）和双翅目（29%）在瑞吉斯河。双翅目：（摇蚊科）是两个底栖群落的主要猎物分类群。选择性分析表明，杰纳西河湖鲟对双翅目有积极的选择，而瑞吉河湖鲟则回避双翅目。瑞吉河湖鲟表现出回避鞘翅目，但积极选择蜉蝣目、毛翅目和寡毛纲。结果表明，重新引入的幼年湖鲟正在这两条河流中生长并成功找到猎物，并且似乎积极选择特定的猎物类型。