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Southwestern Atlantic reef-building corals Mussismilia spp. are able to spawn while fully bleached
Marine Biology ( IF 2.4 ) Pub Date : 2021-01-21 , DOI: 10.1007/s00227-021-03824-z
Leandro Godoy , Miguel Mies , Carla Zilberberg , Yugo Pastrana , Amanda Amaral , Nayara Cruz , Cristiano M. Pereira , Amana G. Garrido , Alexandra Paris , Leandro F. A. Santos , Débora O. Pires

Bleaching events are becoming more frequent and intense worldwide. Southwestern Atlantic corals are considered stress-tolerant species that suffer less during bleaching episodes. Therefore, we investigated if the reef-building corals Mussismilia hispida and M. harttii are capable of spawning while fully bleached. We compared spermatozoa concentration and motility, egg diameter and embryo viability between seemingly healthy and bleached colonies for both species. Findings show that both species spawned viable gametes. Concentration and motility of newly-released spermatozoa were similar between healthy and bleached colonies for both species. Unlike M. hispida, a 10% reduction in size was found in egg diameter for M. harttii. Embryo viability for bleached M. hispida colonies did not decrease; for bleached M. harttii there was a reduction from 14.7 to 6.3%, but fertilization and larval development still took place. These findings describe the unprecedented episode of corals spawning viable gametes when entirely bleached, supporting the suggestion of greater resilience for Southwestern Atlantic corals.



中文翻译:

西南大西洋造礁珊瑚Mussismilia spp。能够在完全漂白后产生

漂白事件在世界范围内变得越来越频繁和激烈。西南大西洋珊瑚被认为是耐压力的物种,在漂白过程中遭受的痛苦较小。因此,我们调查了在完全漂白的情况下礁珊瑚Mussismilia hispidaM. harttii能否产卵。我们比较了看似健康和漂白菌落的两个物种的精子浓度和活力,卵径和胚胎活力。研究结果表明,这两个物种都产生了可行的配子。在健康和漂白菌落中,两种物种新释放的精子的浓度和运动性相似。与M. hispida不同,harttii M.的卵径减小了10%。漂白的M. hispida菌落的胚活力没有降低;漂白的哈氏支原体从14.7%下降到6.3%,但受精和幼体发育仍在进行。这些发现描述了前所未有的珊瑚完全被漂白后会产生活的配子的现象,支持了对西南大西洋珊瑚更大的韧性的建议。

更新日期:2021-01-21
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