The negative impacts of ocean warming and acidification on bivalve fisheries are well documented but few studies investigate parameters relevant to energy budgets and larval dispersal. This study used laboratory experiments to assess developmental, physiological and behavioral responses to projected climate change scenarios using larval Atlantic surfclams Spisula solidissima solidissima, found in northwest Atlantic Ocean continental shelf waters. Ocean warming increased feeding, scope for growth, and biomineralization, but decreased swimming speed and pelagic larval duration. Ocean acidification increased respiration but reduced immune performance and biomineralization. Growth increased under ocean warming only, but decreased under combined ocean warming and acidification. These results suggest that ocean warming increases metabolic activity and affects larval behavior, while ocean acidification negatively impacts development and physiology. Additionally, principal component analysis demonstrated that growth and biomineralization showed similar response profiles, but inverse response profiles to respiration and swimming speed, suggesting alterations in energy allocation under climate change.

海洋变暖和酸化对双壳类渔业的负面影响有据可查，但很少有研究调查与能量收支和幼体扩散相关的参数。这项研究使用实验室实验来评估发育、生理和行为对使用幼虫大西洋海藻Spisula solidissima solidissima 的预测气候变化情景的反应, 发现于西北大西洋大陆架水域。海洋变暖增加了摄食、生长范围和生物矿化，但减少了游泳速度和远洋幼体的持续时间。海洋酸化增加了呼吸作用，但降低了免疫性能和生物矿化作用。仅在海洋变暖的情况下增长增加，但在海洋变暖和酸化的共同作用下增长减少。这些结果表明，海洋变暖会增加新陈代谢活动并影响幼虫行为，而海洋酸化会对发育和生理产生负面影响。此外，主成分分析表明，生长和生物矿化显示出相似的响应曲线，但对呼吸和游泳速度的响应曲线却相反，表明在气候变化下能量分配发生了变化。