Univ Brest, CNRS, IRD, Ifremer, LEMAR, Plouzane, France.
Univ Brest, CNRS, IRD, Ifremer, LEMAR, Plouzane, France.
Mar Pollut Bull. 2022 Feb;175:113131. doi: 10.1016/j.marpolbul.2021.113131. Epub 2021 Nov 26.
This study examined the physiological responses of the larval stages of Haliotis tuberculata, an economically important abalone, to combined temperature (17 °C and 19 °C) and pH (ambient pH and -0.3 units, i.e., +200% increase in seawater acidity) in a full factorial experiment. Tissue organogenesis, shell formation, and shell length significantly declined due to low pH. High temperature significantly increased the proportion of fully shelled larvae at 24 h post-fertilization (hpf), but increased the proportion of unshelled larvae at 72 hpf. Percentage of swimming larvae at 24 hpf, 72 hpf and 96 hpf significantly declined due to high temperature, but not because of low pH. Larval settlement increased under high temperature, but was not affected by low pH. Despite the fact that no interaction between temperature and pH was observed, the results provide additional evidence on the sensitivity of abalone larvae to both low pH and high temperature. This may have negative consequences for the persistence of abalone populations in natural and aquaculture environments in the near future.
本研究采用完全因子实验，研究了经济上重要的鲍鱼物种皱纹盘鲍（Haliotis tuberculata）幼虫阶段对温度（17°C 和 19°C）和 pH 值（海水自然 pH 值和降低 0.3 个单位，即海水酸度增加 200%）的综合生理反应。低 pH 值显著降低了组织器官发生、贝壳形成和贝壳长度，导致幼虫贝壳化不全。高温显著增加了受精后 24 小时（hpf）完全贝壳化幼虫的比例，但增加了 72 hpf 时无壳幼虫的比例。高温显著降低了 24 hpf、72 hpf 和 96 hpf 时游动幼虫的比例，但低 pH 值对其没有影响。高温促进了幼虫的附着，但低 pH 值没有影响幼虫的附着。尽管未观察到温度和 pH 值之间存在交互作用，但这些结果为鲍鱼幼虫对低 pH 值和高温的敏感性提供了额外证据。这可能对未来自然和养殖环境中鲍鱼种群的生存产生负面影响。
