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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Growth of young-of-year sablefish (Anoplopoma fimbria) in response to temperature and prey quality: Insights from a life stage specific bioenergetics model
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Growth of young-of-year sablefish (Anoplopoma fimbria) in response to temperature and prey quality: Insights from a life stage specific bioenergetics model

机译：温度和猎物质量对年幼小黑貂（Anoplopoma fimbria）的生长：特定于生命阶段的生物能学模型的见解

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The first year is typically a bottleneck for juvenile fishes and survival at this stage can be dictated by environmental conditions affecting growth, such as temperature and food availability. Shifts in environmental conditions-and the resulting effects on growth-are of particular concern for high latitude species, which are experiencing more pronounced impacts of climate change. We measured effects of temperature on growth, consumption, and respiration of young-of-year (YOY) Sablefish (218-289 mm TL; Anoplopoma fimbria) in laboratory trials. Physiological response functions were used to outfit a novel, life stage specific bioenergetics model. Average daily growth rates ranged from 0.82 to 3.42 g(-1) (46.7 to 122 J g(-1) d(-1)), with optimum growth occurring at 12-16 degrees C and declining substantially outside of this range. We then validated the model by comparing model estimates of growth to known growth rates for a separate cohort of Sablefish reared under controlled conditions. Sensitivity analysis indicated that the consumption-related parameters had the greatest influence on model outputs. As such, consumption parameters should be determined with care. Finally, we used the model to characterize the conditions necessary for wild YOY Sablefish to successfully settle from neustonic to demersal stages by modeling temperature-prey scenarios that reflect the transition from neustonic offshore to demersal nearshore habitats observed over the period from August to October. Our findings suggest that Sablefish in the Gulf of Alaska could thrive under warming ocean conditions given sufficient food, which corroborates reports of high Sablefish recruitment events following a marine heat wave in 2014.
机译：第一年通常是幼鱼的瓶颈，在这一阶段的存活可能取决于影响生长的环境条件，例如温度和食物供应量。高纬度物种特别关注环境条件的变化及其对生长的影响，而高纬度物种正在遭受气候变化的更为明显的影响。在实验室试验中，我们测量了温度对年幼（Small-of-Year）紫貂（218-289 mm TL; Anoplopoma fimbria）生长，食用和呼吸的影响。生理反应功能被用来装备一个新颖的，生命阶段特定的生物能学模型。平均日生长速率介于0.82至3.42 g（-1）（46.7至122 J g（-1）d（-1））之间，最佳生长发生在12-16摄氏度，并且基本在该范围之外下降。然后，我们通过将在受控条件下饲养的一个单独的Sablefish种群的模型生长估计值与已知增长率进行比较，来验证模型。敏感性分析表明，与消耗有关的参数对模型输出的影响最大。因此，应谨慎确定消耗参数。最后，我们通过对温度-猎物情景进行建模来表征野生YOY雪貂成功地从新生物过渡到沉没阶段的必要条件，该情景反映了从8月到10月期间观察到的从新近海生境过渡到近海近海生境。我们的发现表明，只要有足够的食物，阿拉斯加湾的黑貂就可以在海洋变暖的条件下壮成长，这证实了2014年海洋热浪后大量黑貂招募事件的报道。

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