Pattern, synchrony and predictability of spawning of the tropical abalone Haliotis asinina from Heron Reef, Australia
Pattern, synchrony and predictability of spawning of the tropical abalone Haliotis asinina from Heron Reef, Australia
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DOI：
10.3354/meps213193
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发表时间：
2001-01-01
影响因子：
2.5
通讯作者：
Degnan, BM
中科院分区：
文献类型：
--
作者：
Counihan, RT;McNamara, DC;Degnan, BM
研究了澳大利亚苍鹭礁热带鲍鲍的产卵生物学，以确定可能的环境和内源因素控制产卵。第二次产卵。与大多数其他盐藻和海洋无脊椎动物相比，asinina是高度有规律的，频率高且非常同步。这些事件似乎是由一个以上的环境线索。产卵季节为H. asinina从10月延伸到4月，与水温上升有关。在产卵季节，最近捕获的鲍鱼，住在流通水族馆，释放配子2晚，每2周在新的和满月。然而，产卵的确切日期并不与月球周期精确相关。两个种群间的产卵事件偶尔发生。苍鹭礁上1.5km的asinina之间的差异为1d，表明不同的潮汐制度可能会影响产卵日期。暴露于稍长的春季低潮的人口偶尔产卵1天前。在水族馆中，男性产卵的发病早于女性产卵的发病平均31分钟。产卵的时间与晚上高潮高度相关;男性产卵平均19分钟前的高潮，和女性产卵后的高潮。产卵是高度同步的个人之间，90%开始产卵的第一个人，产卵89分钟内。在异性在场的情况下，个体产卵的百分比更高，而在女性在场的情况下，男性射精的频率更高。同步产卵模式持续6周的H。asinina维持在水族馆;在此期间之后，产卵继续，但不规则和异步。结果表明，低潮暴露量和高潮时间分别间接调节了产卵的日期和时间，这些潮汐要素影响了中华绒螯蟹的产卵生物学。asinina通过维持内源性节律，持续在非潮汐环境中至少6周。
The spawning biology of the tropical abalone Haliotis asinina on Heron Reef, Australia, was investigated to identify putative environmental and endogenous factors controlling spawning. Spawnings by II. asinina were highly regular and, in comparison to most other haliotids and marine invertebrates, frequent and extremely synchronous. These events appeared to be regulated by more than 1 environmental cue. The spawning season of H. asinina extends from October to April and is associated with an increase in water temperature. During the spawning season, recently captured abalone, housed in flow-through aquaria, released gametes for 2 nights every 2 wk during the new and full moons. However, the exact date of spawning did not correlate precisely with the lunar cycle. Occasionally the spawning events between 2 populations of H. asinina on Heron Reef that were 1.5 km apart differed by 1 d, suggesting that differential tidal regimes might influence the date of spawning. The population that was exposed to slightly longer spring low tides occasionally spawned 1 d earlier. In the aquaria, the onset of male spawnings was earlier than the onset of female spawnings by an average of 31 min. The time of spawning of either sex was highly correlated with the evening high tide; males spawned an average of 19 min prior to the high tide, and females spawned 11 min after the high tide. Spawnings were highly synchronous amongst individuals, with 90% commencing spawning within 89 min of the first individual that spawned. A greater percentage of individuals spawned when in the presence of the opposite sex and the frequency of male ejaculation was greater when in the presence of females. Synchronous spawning patterns persisted for 6 wk in H. asinina maintained in aquaria; after this period, spawnings continued but were irregular and asynchronous. We propose that low tide exposure and time of high tide indirectly regulate the date and time of spawning respectively, and that these tidal elements influence the spawning biology of H. asinina by maintaining endogenous rhythms that persist in non-tidal environments for at least 6 wk.