Spawning, embryogenesis, settlement, and post‐settlement development of the gorgonian Plexaura homomalla
Spawning, embryogenesis, settlement, and post‐settlement development of the gorgonian Plexaura homomalla
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柳珊瑚 Plexaura humalla 的产卵、胚胎发生、定居和定居后发育
DOI：
10.1111/ivb.12319
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发表时间：
2021
影响因子：
1.2
通讯作者：
Lasker, Howard R.
中科院分区：
文献类型：
--
作者：
Tonra, Kaitlyn J.;Wells, Christopher D.;Lasker, Howard R.
通过仔细观察造礁生物的个体发育和生殖生物学，可以研究种群生物学和群落结构的模式。这些知识对于加勒比八珊瑚来说尤其重要，它们似乎比石珊瑚更能适应长期环境变化，并提供一些相同的生态服务。我们在 10 周的时间里监测了黑海鱼竿 Plexaurahomalla（一种常见的、广泛分布在加勒比海浅礁上的八珊瑚）从卵到三水螅群落的发育过程。配子是在 7 月满月后 3-6 天发生的产卵事件期间在美属维尔京群岛圣约翰收集的。受精后 3 小时开始卵裂，卵裂呈全胚、等径、放射状。胚胎一直有浮力，直到受精后 3 天变成浮胚。受精后 4 天浮浪就能够定居。受精后约 8 天，共生藻开始感染息肉。总体而言，除了受精后 3.5 至 6 小时内胚胎数量增加之外，加勒比八珊瑚的发育是典型的。
Patterns of population biology and community structure can be studied by looking closely at the ontogeny and reproductive biology of reef‐building organisms. This knowledge is particularly important for Caribbean octocorals, which seem to be more resilient to long‐term environmental change than scleractinian corals and provide some of the same ecological services. We monitored the development of the black sea rod,Plexaura homomalla, a common, widely distributed octocoral on shallow Caribbean reefs, from eggs to three‐polyp colonies over the course of 10 weeks. Gametes were collectedex situon St. John, U.S. Virgin Islands, during spawning events that occurred 3–6 days after the July full moon. Cleavage started 3.0 hr after fertilization and was holoblastic, equal, and radial. Embryos were positively buoyant until becoming planulae at 3 days after fertilization. Planulae were competent to settle 4 days after fertilization. Symbiodiniaceae began infecting polyps ~8 days after fertilization. Overall, development was typical for Caribbean octocorals, except for an increase in the number of embryos between 3.5 and 6.0 hr after fertilization.