The environmental regulation of maturation in farmed finfish with special reference to the role of photoperiod and melatonin
The environmental regulation of maturation in farmed finfish with special reference to the role of photoperiod and melatonin
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DOI：
10.1016/s0044-8486(01)00583-x
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发表时间：
2001-06-01
期刊：
影响因子：
4.5
通讯作者：
Randall, C
中科院分区：
文献类型：
--
作者：
Bromage, N;Porter, M;Randall, C
可以说，鱼类最显著的特征是它们的季节性，发育和成熟事件的时间由气候，日照长度和食物供应的季节性变化主导，并与之同步。这种协调和相关的内部控制过程确保幼鱼在最适合其生存的环境条件下生产。因此，中纬度和高纬度鱼种的第一次摄食鱼苗是在春季温度和日照时间增加时产生的，而热带和亚热带鱼类的相应阶段似乎是在季节性降雨或洋流运动后生产力增加的时候产生的。由于性腺发育和随后的配子和胚胎形成需要很长时间才能完成，很明显，性腺复发必须在数月前开始，以确保第一次喂养鱼苗的生产与气候和营养物质供应的季节性改善相一致。鱼类和其他大多数季节性繁殖的动物一样，沿着着季节的变化，依靠外部环境的提示来实现成熟期的同步。这些线索通常被称为AproximateB，以区别于AultimateB因素或环境条件，后者是那些理想的年轻人
Arguably the most striking characteristic of fish is their seasonality, with the timing of developmental and maturational events dominated by and, in parallel, synchronised with seasonal changes in climate, daylength and food supplies. This coordination and the associated internal processes of control ensure that young fish are produced when environmental conditions are most suitable for their survival. Thus, the first-feeding fry of mid and higher latitude species are produced when temperatures and daylengths are increasing in the spring, whereas the corresponding stages of tropical and sub-tropical fish appear to be timed to the increased productivity which follows seasonal rainfall or movements in oceanic currents. Since gonadal development and subsequent gamete and embryo formation take a long time to complete, it is clear that gonadal recrudescence must have been initiated many months earlier to ensure that the production of first-feeding fry is coincident with seasonal improvements in climate and nutrient availability. Fish, along with most other seasonally breeding animals, rely on cues from the external environment to achieve synchronisation of maturational events with changing season. These cues are often referred to as AproximateB to distinguish them from the AultimateB factors or environmental conditions, which are those under which ideally the young of