An understanding of biological characteristics, such as growth patterns, condition, and energy reserves, is important for better understanding the environmental constraints exerted on fish populations. This is especially true for exploited fish stocks in the current context of climate change. Using biological data collected from 2006 to 2009 during bottom trawl research surveys by Fisheries and Oceans Canada in the estuary and Gulf of St. Lawrence (EGSL) as well as data from 2000 to 2018 in the northwest Atlantic, we sought to improve our knowledge on the seasonal condition of Greenland Halibut Reinhardtius hippoglossoides juveniles and to better understand the divergence in some life history traits between juveniles captured in these two regions. We validated the use of the Le Cren condition index and evaluated its relationship with energetic status in juvenile (20–32-cm TL) Greenland Halibut. In the EGSL, juvenile condition was higher in winter and spring compared to summer and fall. Such variations may result from this species’ pelagic predation activity and prey availability. Juveniles captured in the EGSL during 2016–2017 were larger but had a lower condition index than those captured in the northwest Atlantic, but we found no indication of earlier sexual maturation in the EGSL that could explain the sex ratio differences we observed in catches from these two areas.

中文翻译：

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Le Cren 状况指数显示的幼年格陵兰比目鱼的当地、季节性和年度状况

了解生物特征，例如生长模式、条件和能量储备，对于更好地了解对鱼类种群施加的环境限制非常重要。在当前气候变化的背景下，对于开发利用的鱼类资源尤其如此。使用加拿大渔业和海洋部在河口和圣劳伦斯湾 (EGSL) 进行的底拖网研究调查期间从 2006 年到 2009 年收集的生物数据以及在西北大西洋从 2000 年到 2018 年的数据，我们试图提高我们对格陵兰比目鱼Reinhardtius hippoglossoides的季节性条件并更好地了解在这两个地区捕获的幼鱼之间某些生活史特征的差异。我们验证了 Le Cren 状况指数的使用，并评估了其与幼年（20-32 厘米 TL）格陵兰比目鱼能量状态的关系。在EGSL中，与夏季和秋季相比，冬季和春季的幼虫状况更高。这种变化可能是由于该物种的远洋捕食活动和猎物可用性造成的。2016-2017 年在 EGSL 中捕获的幼鱼比在西北大西洋捕获的幼鱼更大，但状况指数较低，但我们没有发现 EGSL 中性成熟较早的迹象可以解释我们在这些捕获物中观察到的性别比例差异两个领域。