Physiology Department, Faculty of Biology, Murcia University, 30100 Murcia, Spain.
J Fish Biol. 2009 Jul;75(1):61-74. doi: 10.1111/j.1095-8649.2009.02263.x.
A periodicity of 29 days was observed in spawning rhythms in Senegal sole Solea senegalensis, with an acrophase around the last quarter and the new moon. In both spring and autumn, a very marked nocturnal spawning rhythm was registered, with spawning beginning after dusk and the acrophase occurring around 2300 hours. When the photoperiod was artificially extended (from 10L:14D to 14L:10D), S. senegalensis synchronized to the new photoperiod: spawning took place after the new 'dusk', the beginning gradually shifting from 2100 to 2300 hours and the acrophase from 2325 to 0032 hours. Under continuous light conditions, fish sustained rhythmicity for 2 days, with an acrophase at 2249 hours, which suggested the existence of an endogenous pacemaker controlling the daily spawning rhythm. These findings provided new insights for better understanding the reproductive physiology of this species and for optimizing the timing protocols of egg collection and larvae production in S. senegalensis aquaculture.
塞内加尔牙鲆（Solea senegalensis）的产卵节律具有 29 天的周期性，高峰期出现在新月和上弦月前后。在春季和秋季，都记录到了非常明显的夜间产卵节律，产卵始于黄昏后，高峰期出现在 2300 小时左右。当光照时间被人为延长（从 10L:14D 变为 14L:10D）时，塞内加尔牙鲆会与新的光照时间同步：产卵发生在新的“黄昏”之后，开始时间逐渐从 2100 小时变为 2300 小时，高峰期从 2325 小时变为 0032 小时。在持续光照条件下，鱼类维持了 2 天的节律性，高峰期出现在 2249 小时，这表明存在一个内源性的生物钟来控制每日的产卵节律。这些发现为更好地理解该物种的生殖生理学以及优化塞内加尔牙鲆养殖中的卵子采集和幼虫生产的时间方案提供了新的见解。
