Embryo and larval biology of the deep-sea octocoral Dentomuricea aff. meteor under different temperature regimes.
Embryo and larval biology of the deep-sea octocoral Dentomuricea aff. meteor under different temperature regimes.
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DOI：
10.7717/peerj.11604
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发表时间：
2021
期刊：
影响因子：
2.7
通讯作者：
Carreiro-Silva M
中科院分区：
文献类型：
--
作者：
Rakka M;Godinho A;Orejas C;Carreiro-Silva M
深海珊瑚是深海生态系统中常见的生境形成者，然而，我们对其早期生活史阶段的了解极为有限。本研究着重于Dentomuricea aff的早期生活史。一种常见于亚速尔群岛的深海珊瑚。目的是描述目标鱼种在两种温度条件下的胚胎和幼虫生物学，这两种温度条件对应于产卵季节自然环境中的最低和最高温度。在13 ±0.5 °C的温度下，该物种的胚胎在96小时后达到浮浪期，并显示出11天的中位存活期。刺激后，浮板才显示游泳，游泳速度为0.24 ±0.16 mm s-1，随时间推移略有增加，但显著。在较高温度（15 °C ±0.5 °C）下，胚胎提前24小时（72小时后）达到浮浪期，中位存活期为16天，游泳速度显著提高（0.3 ±0.27 mm s-1）。虽然存活率的差异在统计学上并不显著，但我们的研究结果强调了温度的微小变化如何影响胚胎和幼虫的特征，并在幼虫的传播和成功方面产生潜在的级联效应。在这两种温度下，沉降速率低，即使没有沉降也会发生变态。深海珊瑚很少有这类资料，尽管这类资料对于更好地了解底栖物种的分布、连通性和生态地理模式至关重要。
Deep-sea octocorals are common habitat-formers in deep-sea ecosystems, however, our knowledge on their early life history stages is extremely limited. The present study focuses on the early life history of the species Dentomuricea aff. meteor, a common deep-sea octocoral in the Azores. The objective was to describe the embryo and larval biology of the target species under two temperature regimes, corresponding to the minimum and maximum temperatures in its natural environment during the spawning season. At temperature of 13 ±0.5 °C, embryos of the species reached the planula stage after 96h and displayed a median survival of 11 days. Planulae displayed swimming only after stimulation, swimming speed was 0.24 ±0.16 mm s−1 and increased slightly but significantly with time. Under a higher temperature (15 °C ±0.5 °C) embryos reached the planula stage 24 h earlier (after 72 h), displayed a median survival of 16 days and had significantly higher swimming speed (0.3 ±0.27 mm s−1). Although the differences in survival were not statistically significant, our results highlight how small changes in temperature can affect embryo and larval characteristics with potential cascading effects in larval dispersal and success. In both temperatures, settlement rates were low and metamorphosis occurred even without settlement. Such information is rarely available for deep-sea corals, although essential to achieve a better understanding of dispersal, connectivity and biogeographical patterns of benthic species.
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DOI：
10.1016/j.dsr2.2016.05.008
发表时间：
2017-03-01
影响因子：
3
作者：
Brooke, S. D.;Watts, M. W.;Ross, S. W.
通讯作者：
Ross, S. W.
影响因子：
4.9
作者：
Braga-Henriques, A.;Porteiro, F. M.;Santos, R. S.
通讯作者：
Santos, R. S.
影响因子：
3.3
作者：
Byrne, M.
通讯作者：
Byrne, M.
影响因子：
3.5
作者：
Graham, E. M.;Baird, A. H.;Connolly, S. R.
通讯作者：
Connolly, S. R.
影响因子：
2.5
作者：
Elkin, Che;Marshall, Dustin J.
通讯作者：
Marshall, Dustin J.