Nozawa Yoko, Okubo Nami
Biodiversity Research Center, Academia Sinica, 128 Academia Road Sec. 2, Nankang, Taipei 115, Taiwan, ROC.
Biol Bull. 2011 Feb;220(1):15-22. doi: 10.1086/BBLv220n1p15.
Temporal dynamics of larval survival were examined in vitro in four broadcast-spawning reef coral species, Acropora hyacinthus, A. japonica, A. solitaryensis, and Goniastrea pectinata. Larval size was treated as an important characteristic that may relate to larval lifespan. Two patterns were observed in larval survival dynamics between the three Acropora species (mean initial larval size; 0.05-0.08 mm(3)) and G. pectinata (0.02 mm(3)), based on the timing of a sharp drop in larval survival rates (ca. > 50% reduction over a 1-2 week period). Consequently, the majority of larvae of the three Acropora species had a lifespan of less than 2-3 weeks, whereas those of G. pectinata were extended a further 2-3 weeks despite the smaller larval size. No significant relationship was detected between the initial larval size and larval lifespan in any of the four reef coral species. These results suggest that (1) larval dispersal of spawning Acropora species may be on a more local scale than that of G. pectinata and most other reef coral species previously reported, and (2) larval size is not a good estimator of larval lifespan in reef coral species.
在体外研究了四种产卵的珊瑚礁珊瑚物种（风信子鹿角珊瑚、日本鹿角珊瑚、单枝鹿角珊瑚和梳状刺星珊瑚）幼体存活的时间动态。幼体大小被视为一个可能与幼体寿命相关的重要特征。基于幼体存活率急剧下降的时间（在1至2周内约降低50%以上），在三种鹿角珊瑚物种（平均初始幼体大小为0.05 - 0.08立方毫米）和梳状刺星珊瑚（0.02立方毫米）之间观察到了两种幼体存活动态模式。因此，三种鹿角珊瑚物种的大多数幼体寿命不到2至3周，而梳状刺星珊瑚的幼体尽管大小较小，但寿命延长了2至3周。在这四种珊瑚礁珊瑚物种中，均未检测到初始幼体大小与幼体寿命之间存在显著关系。这些结果表明：（1）产卵的鹿角珊瑚物种的幼体扩散范围可能比梳状刺星珊瑚以及之前报道的大多数其他珊瑚礁珊瑚物种更局限于局部范围；（2）在珊瑚礁珊瑚物种中，幼体大小并非幼体寿命的良好估计指标。
