Rosales-Velázquez M O, Muttray A F, Devlin R H
Department of Fisheries & Oceans, 4160 Marine Drive, West Vancouver, MC, V7V 1N6, Canada.
Centro Interdisciplinario de Ciencias Marinas-Instituto Politécnico, Nacional. Ave. Instituto Politécnico Nacional s/n. Colonia Playa. Palo de Santa Rita, C.P. 23096, La Paz, M.C.S, Mexico.
J Fish Biol. 2018 May;92(5):1333-1341. doi: 10.1111/jfb.13588. Epub 2018 Mar 12.
The effect of feed cycling (consisting of periods of starvation followed by periods of refeeding to satiation) on compensatory growth was evaluated in growth hormone transgenic and non-transgenic wild-type coho salmon Oncorhynchus kisutch. The specific growth rate (G ) of feed-restricted non-transgenic O. kisutch was not significantly different from the G of fully-fed non-transgenic O. kisutch during two refeeding periods, whereas the G of feed-restricted transgenic O. kisutch was significantly higher in relation to the G of fully-fed transgenic O. kisutch during the second refeeding period, but not during the first, indicating that growth compensation mechanisms are different between non-transgenic and growth-hormone (GH)-transgenic O. kisutch and may depend on life history (i.e. previous starvation). Despite the non-significant growth rate compensation in non-transgenic O. kisutch, these fish showed a level of body mass catch-up growth not displayed by transgenic O. kisutch.
在生长激素转基因和非转基因野生型银大麻哈鱼（Oncorhynchus kisutch）中评估了投喂循环（由饥饿期和随后的再投喂至饱足期组成）对补偿生长的影响。在两个再投喂期内，限饲的非转基因银大麻哈鱼的特定生长率（G）与全喂的非转基因银大麻哈鱼的G没有显著差异，而限饲的转基因银大麻哈鱼的G在第二个再投喂期相对于全喂的转基因银大麻哈鱼的G显著更高，但在第一个再投喂期并非如此，这表明非转基因和生长激素（GH）转基因银大麻哈鱼的生长补偿机制不同，并且可能取决于生活史（即先前的饥饿情况）。尽管非转基因银大麻哈鱼的生长率补偿不显著，但这些鱼表现出了转基因银大麻哈鱼未表现出的体重追赶生长水平。
