Abstract In a context of climate change, understanding the influence of temperature on fish species growth is important for the management of fisheries. The effect of increasing temperature on the growth of juvenile Greenland halibut (Reinhardtius hippoglossoides), a cold-water species, circum-continental in the Arctic, was investigated on juveniles that had been captured in the wild and kept in captivity. Mortality rate increased with higher temperature, from 4.5 % at 4.0 °C to 15.2 % at 7.5 °C. Relative growth (normalized in degree-days) was lower at 7.5 °C than at the two other temperatures tested. Food conversion efficiency, muscle energy content, and the Fulton condition index were not influenced by temperature, but food intake significantly increased over time at 5.5 °C. No clear difference in growth trajectories between sexes was highlighted. Overall, the results suggest that optimal temperature conditions were exceeded at 7.5 °C and that any further increase in temperature would significantly decrease survival and impair juvenile growth. With the current deep-water warming trends in the Estuary and Gulf of St. Lawrence, recruitment and commercial fishing of Greenland halibut may be impaired in the near future.

中文翻译：

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幼年格陵兰比目鱼 (Reinhardtius hippoglossoides) 在河口和圣劳伦斯湾温度升高的情况下生长

摘要 在气候变化的背景下，了解温度对鱼类生长的影响对于渔业管理很重要。温度升高对格陵兰比目鱼（Reinhardtius hippoglossoides）幼鱼生长的影响是对在野外捕获并被圈养的幼鱼进行研究的，该种冷水物种位于北极圈内。死亡率随温度升高而增加，从 4.0°C 时的 4.5% 增加到 7.5°C 时的 15.2%。7.5 °C 时的相对生长（以度数-天为单位标准化）低于其他两个测试温度。食物转化效率、肌肉能量含量和富尔顿状况指数不受温度影响，但食物摄入量在 5.5 °C 时随时间显着增加。性别之间的生长轨迹没有明显差异。总体而言，结果表明最佳温度条件在 7.5 °C 时被超过，温度的任何进一步升高都会显着降低存活率并损害幼鱼的生长。由于目前河口和圣劳伦斯湾的深水变暖趋势，格陵兰大比目鱼的招募和商业捕捞在不久的将来可能会受到影响。