Rossignol O, Dodson J J, Marquilly C, Guderley H
Département de Biologie, Université Laval, Quebec G1V 0A6, Canada.
Physiol Biochem Zool. 2010 May-Jun;83(3):424-34. doi: 10.1086/649561.
Atlantic salmon (Salmo salar L.) is an iteroparous, anadromous species that exhibits some of the greatest within-population variability in size and age at maturity of all vertebrates. In the conditional reproductive strategy of salmonids, the male reproductive tactic expressed is believed to depend on an individual male's status relative to others in the population and therefore depends on his capacity to attain a physiological threshold, the exact nature of which is unknown. Although the threshold is influenced by local biotic and abiotic conditions, it is likely to be under genetic control. Our study examined whether the early growth, muscle metabolic capacities, routine metabolic rate, and spontaneous swimming of salmon alevins reared in laboratory conditions varied with the population of origin, maternal investment, and the paternal reproductive tactic. Our experimental design allowed us to establish that neither the population of origin nor the paternal reproductive tactic influenced the physiological capacities of alevins. The strong influence of the mother on alevin metabolic capacities suggests that the bioenergetic differences in metabolic capacities, realized metabolic rates, and activity levels that could eventually dictate the reproductive tactic of male offspring may originate in maternal effects.
大西洋鲑（Salmo salar L.）是一种多次繁殖的溯河洄游性物种，在所有脊椎动物中，其种群内部在成熟时的大小和年龄差异最为显著。在鲑科鱼类的条件性繁殖策略中，雄性所表现出的繁殖策略被认为取决于个体雄性相对于种群中其他个体的地位，因此取决于其达到生理阈值的能力，而该阈值的确切性质尚不清楚。尽管该阈值受当地生物和非生物条件的影响，但很可能受遗传控制。我们的研究调查了在实验室条件下饲养的鲑鱼仔鱼的早期生长、肌肉代谢能力、常规代谢率和自发游泳能力是否因起源种群、母体投资和父本繁殖策略而异。我们的实验设计使我们能够确定，起源种群和父本繁殖策略均不会影响仔鱼的生理能力。母亲对仔鱼代谢能力的强烈影响表明，代谢能力、实际代谢率和活动水平方面的生物能量差异最终可能决定雄性后代的繁殖策略，而这些差异可能源于母体效应。
