Adaption potential of Crassostrea gigas to ocean acidification and disease caused by Vibrio harveyi

Nordio Davide; Khtikian Natalie; Andrews Sean; Bertotto Daniela; Leask Karen; Green Timothy

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Adaption potential of Crassostrea gigas to ocean acidification and disease caused by Vibrio harveyi

机译：Crassostrea Gigas对海洋酸化和疾病的适应潜力，哈韦蒂引起的

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The survival and development of bivalve larvae is adversely impacted by ocean acidification and Vibrio infection, indicating that bivalves need to simultaneously adapt to both stressors associated with anthropogenic climate change. In this study, we use a half-dial breeding design to estimate heritability (h(2)) for survival to Vibrio harveyi infection and larval shell length to aragonite undersaturated and normal conditions in laboratory-reared Crassostrea gigas. Phenotypic differences were observed between families for these traits with heritability estimated to be moderate for survival to V. harveyi challenge (h(2) = 0.25) and low for shell length in corrosive (Omega(aragonite) = 0.9, h(2) = 0.15) and normal conditions (Omega(aragonite) = 1.6, h(2) = 0.15). Predicted breeding values for larval shell length are correlated between aragonite-undersaturated and normal conditions (Spearman r = 0.63, p 0.05), indicating that larger larvae tend to do better in corrosive seawater. Aquaculture hatcheries routinely cull slow-growing larvae to reduce and synchronize time taken for larvae to metamorphose to spat, thus inadvertently applying size-related selection for larger larvae. This indirect selection in the hatchery populations provides a plausible explanation why domesticated oyster populations are less sensitive to ocean acidification.

机译：海洋酸化和弧菌感染对幼虫的生存和发展产生不利影响，表明双抗体需要同时适应与人为气候变化相关的两种压力。在这项研究中，我们使用半拨号育种设计来估算遗传性（H（2）），用于生存至vibrio harveyi感染和幼虫壳长度，以在实验室饲养的鲫鱼中的基石不饱和和正常情况下。在这些特征之间观察到表型差异，其可遗传性估计为中等用于生存至V.Arveyi挑战（H（2）= 0.25），腐蚀性壳长度（H（2）= 0.25），壳体长度低（Ω（金属石岩）= 0.9，H（2）= 0.15）和正常条件（Omega（金属石）= 1.6，H（2）= 0.15）。幼虫壳长度的预测繁殖值在树脂缺失和正常条件（Spearman R = 0.63，P <0.05）之间相关，表明较大的幼虫在腐蚀性海水中倾向于做得更好。水产养殖孵化犬常规剔除幼虫，以减少和同步幼虫到变色的时间，从而无意中对较大的幼虫进行尺寸相关的选择。在孵化场所中的这种间接选择提供了一种合理的解释，为什么驯化的牡蛎种群对海洋酸化不太敏感。

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《ICES Journal of Marine Science》 |2021年第1期|360-367|共8页
作者
Nordio Davide; Khtikian Natalie; Andrews Sean; Bertotto Daniela; Leask Karen; Green Timothy;
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Vancouver Isl Univ Ctr Shellfish Res Dept Fisheries & Aquaculture Nanaimo BC V9R 5S5 Canada|Univ Padua Dept Comparat Biomed & Food Sci I-35020 Padua Italy;

Vancouver Isl Univ Ctr Shellfish Res Dept Fisheries & Aquaculture Nanaimo BC V9R 5S5 Canada;

Vancouver Isl Univ Ctr Shellfish Res Dept Fisheries & Aquaculture Nanaimo BC V9R 5S5 Canada;

Univ Padua Dept Comparat Biomed & Food Sci I-35020 Padua Italy;

Vancouver Isl Univ Ctr Shellfish Res Dept Fisheries & Aquaculture Nanaimo BC V9R 5S5 Canada;

Vancouver Isl Univ Ctr Shellfish Res Dept Fisheries & Aquaculture Nanaimo BC V9R 5S5 Canada;

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正文语种 eng
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关键词
aquaculture; Crassostrea; genetic selection; ocean acidification; Vibrio;

机译：水产养殖;鲫鱼;遗传选择;海洋酸化;振动;

Adaption potential of Crassostrea gigas to ocean acidification and disease caused by Vibrio harveyi

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