Rising water temperature and increased uptake of CO₂ by the ocean are predicted to have widespread impacts on marine species. However, the effects are likely to vary, depending on a species’ sensitivity and the geographical location of the population. Here, we investigated the potential effects of elevated temperature and pCO₂ on larval growth and survival in a New Zealand population of the Australasian snapper, Chrysophyrs auratus. Eggs and larvae were reared in a fully cross-factored experiment (18 °C and 22 °C/pCO₂ 440 and 1040 μatm) to 16 days post hatch (dph). Morphologies at 1 dph and 16 dph were significantly affected by temperature, but not CO₂. At 1dph, larvae at 22 °C were longer (7%) and had larger muscle depth at vent (14%), but had reduced yolk (65%) and oil globule size (16%). Reduced yolk reserves in recently hatched larvae suggests higher metabolic demands in warmer water. At 16 dph, larvae at elevated temperature were longer (12%) and muscle depth at vent was larger (64%). Conversely, survival was primarily affected by CO₂ rather than temperature. Survivorship at 1 dph and 16 dph was 24% and 54% higher, respectively, under elevated CO₂ compared with ambient conditions. Elevated temperature increased survival (24%) at 1 dph, but not at 16 dph. These results suggest that projected climate change scenarios may have an overall positive effect on early life history growth and survival in this population of C. auratus. This could benefit recruitment success, but needs to be weighed against negative effects of elevated CO₂ on metabolic rates and swimming performance observed in other studies on the same population.

预计水温上升和海洋对CO ₂的吸收增加会对海洋物种产生广泛影响。但是，其影响可能会有所不同，具体取决于物种的敏感性和种群的地理位置。在这里，我们调查了高温和p CO ₂对新西兰鲷鱼（Chrysophyrs auratus）新西兰种群中幼虫生长和存活的潜在影响。卵和幼虫在完全交叉分解的实验中（18°C和22°C / p CO ₂ 440和1040μatm）饲养到孵化后16天（dph）。1 dph和16 dph的形貌受温度影响很大，但CO _2则不受影响。在1dph时，在22°C时幼虫更长（7％），并且在出口处的肌肉深度更大（14％），但是卵黄减少（65％）和油球大小（16％）。最近孵化的幼虫卵黄储量的减少表明在温水中的新陈代谢需求更高。在16 dph时，高温下的幼虫更长（12％），发泄处的肌肉深度更大（64％）。相反，存活率主要受CO ₂而非温度的影响。与环境条件相比，在升高的CO ₂下1 dph和16 dph的存活率分别提高了24％和54％。升高温度可提高1 dph的存活率（24％），但不增加16 dph的存活率。这些结果表明，预计的气候变化情景可能对该人群的早期生活史增长和生存产生总体积极影响。鲫鱼。这可以使招聘成功受益，但需要权衡CO ₂升高对其他研究在同一人群上观察到的代谢率和游泳成绩的负面影响。