Abstract:
The ontogenetic development in teleost fish is sensitive to temperature, and the developmental rate has a direct relationship with the environmental temperature within a species\' thermal tolerance limit. Temperature determines time to and survival at hatching. Yellow perch is a North American species of ecological and commercial importance, and its phenology is vulnerable to climate change. The embryonic development of yellow perch was comparable to closely related members of the family Percidae. Developmental progression was fastest at 18°C and slowest at 12°C, with medial progression at 15°C. Time to hatch and swim-up, feeding onset, and exogenous feeding phases were different across all incubation temperatures regardless of a gradual post-hatch warming of the 12 and 15°C groups to a common garden temperature of 18°C. Incubation temperature may lower the rate of survival to hatch at 15°C and had complex impacts on developmental abnormalities. Temperature had significant effects on the development rate, time of hatch, survival, and incidence of developmental abnormalities. Early ontogenetic thermal history in ectotherms is an important factor determining phenotypic variation. It will be important to link the thermally induced changes in development described here to the physiological and morphological differences and to link the developmental abnormalities to functional performance.
摘要:
硬骨鱼的个体发育对温度敏感,并且发育速率与物种热耐受极限内的环境温度有直接关系。温度决定孵化的时间和存活时间。黄鲈鱼是一种具有生态和商业重要性的北美物种,它的物候易受气候变化的影响。黄色鲈鱼的胚胎发育与Percidae家族中密切相关的成员相当。发育进展在18°C时最快,在12°C时最慢,在15°C时内侧进展。是时候孵化和游泳了,喂养开始,无论12和15°C组的孵化后逐渐变暖到18°C的共同花园温度,所有孵化温度的外源喂养阶段都不同。孵化温度可能会降低15°C孵化的存活率,并对发育异常产生复杂影响。温度对发展速度有显著影响,舱口的时间,生存,和发育异常的发生率。外热的早期个体发育热史是决定表型变异的重要因素。重要的是将此处描述的热诱导的发育变化与生理和形态差异联系起来,并将发育异常与功能表现联系起来。