MASS SPAWNING OF CORALS ON A HIGH-LATITUDE CORAL-REEF
MASS SPAWNING OF CORALS ON A HIGH-LATITUDE CORAL-REEF
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DOI：
10.1007/bf00301193
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发表时间：
1994-07-01
期刊：
影响因子：
3.5
通讯作者：
SIMPSON, CJ
中科院分区：
文献类型：
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作者：
BABCOCK, RC;WILLS, BL;SIMPSON, CJ
有证据表明，至少有60%的184种石珊瑚周围的豪特曼Abrolhos群岛（西澳大利亚州）的珊瑚礁上发现参加夏末大规模产卵。因此，这些种群繁殖活跃，尽管大多数物种是在他们的纬度范围的最南端（28度-29度-S）。在本研究中，珊瑚大量产卵发生在同一个月的温带（Houtman-Abrolhos）和热带（Ningaloo）珊瑚礁的西澳大利亚州，尽管两个地区之间的季节性温度最低的时间超过两个月的差异。在产卵的一个月，这同时表明，温度不作为一个简单的直接接近的线索，在这些人口的季节性产卵同步。光周期的季节性变化可能会在这两个地区提供类似和更可靠的信号，因此可能更有可能同步这些珊瑚的季节性生殖节律。此外，有重叠的夜晚，大量产卵的豪特曼Abrolhos和热带珊瑚礁的西澳大利亚州，尽管显着差异的潮汐相位和幅度之间的两个地区。这表明潮汐周期与这些珊瑚礁上产卵的夜晚不同步。产卵更有可能与月亮周期同步。在豪特曼Abrolhos珊瑚种群的大潮与大规模产卵的共同发生可能是遗传遗产继承自北方，热带祖先的证据。Houtman Abrolhos地区的微潮制度可能没有施加足够的选择性压力来抵消这一遗产。
Evidence is presented that at least 60% of the 184 species of scleractinian corals found on reefs surrounding the Houtman Abrolhos Islands (Western Australia) participate in a late summer mass spawning. These populations are thus reproductively active, despite most species being at the extreme southern limit of their latitudinal range (28-degrees-29-degrees-S). In the present study, coral mass spawning occurred in the same month on both temperate (Houtman-Abrolhos) and tropical (Ningaloo) reefs of Western Australia, despite more than two months difference in the timing of seasonal temperature minima between the two regions. This concurrence in the month of spawning suggests that temperature does not operate as a simple direct proximate cue for seasonal spawning synchrony in these populations. Seasonal variation in photoperiod may provide a similar and more reliable signal in the two regions, and thus might be more likely to synchronize the seasonal reproductive rhythms of these corals. Also there is overlap in the nights of mass spawning on the Houtman Abrolhos and tropical reefs of Western Australia, despite significant differences in tidal phase and amplitude between the two regions. This indicates that tidal cycle does not synchronize with the night(s) of spawning on these reefs. Spawning is more likely to be synchronised by lunar cycles. The co-occurrence of the mass spawning with spring tides in Houtman Abrolhos coral populations may be evidence of a genetic legacy inherited from northern, tropical ancestors. Micro-tidal regimes in the Houtman Abrolhos region may have exerted insufficient selective pressure to counteract this legacy.