National Marine Fisheries Service, Northeast Fisheries Science Center, 166 Water Street, Woods Hole, MA 02543, USA.
J Fish Biol. 2011 Aug;79(2):356-73. doi: 10.1111/j.1095-8649.2011.03020.x. Epub 2011 Jul 8.
Dietary analyses of Atlantic salmon Salmo salar post-smolt stomachs collected from 2001 to 2005 in Penobscot Bay, Maine, U.S.A., have yielded insights into the feeding ecology of early marine phase post-smolts from different rearing origins. Most stomachs contained only one or two prey types, suggesting active prey selection. Post-smolts that lived in the river longer (i.e. from naturally reared and parr-stocked origins) were smaller and consumed more fishes than invertebrates compared to larger post-smolts that emigrated immediately post-stocking (i.e. from smolt-stocked origins). Naturally reared S. salar consumed c. 84% fishes and 16% crustaceans and parr-stocked S. salar consumed 64% fishes and 34% crustaceans. Stocked smolts consumed 48% fishes and 40% crustaceans. Differences in the type and quantity of consumed prey may be indicative of behavioural differences among rearing origins that influence post-smolt survival.
2001 年至 2005 年期间，在美国缅因州彭诺斯科特湾收集的大西洋三文鱼 Salmo salar 幼鱼胃内容物的饮食分析，深入了解了来自不同养殖起源的早期海洋阶段幼鱼的摄食生态。大多数胃中只含有一种或两种猎物类型，这表明存在主动的猎物选择。与那些立即在放养后洄游（即来自放养的幼鱼）的较大幼鱼相比，在河里生活时间较长（即来自自然放养和幼鱼放养的起源）的幼鱼体型较小，消耗的鱼类比无脊椎动物多。自然放养的 S. salar 消耗约 84%的鱼类和 16%的甲壳类动物，而放养的幼鱼消耗 64%的鱼类和 34%的甲壳类动物。放养的幼鱼消耗 48%的鱼类和 40%的甲壳类动物。消耗的猎物类型和数量的差异可能表明养殖起源之间存在行为差异，这些差异影响幼鱼的生存。
