Freshwater whitefishes, Salmonidae Coregoninae, are cold stenothermic fishes of ecological and socio-economic importance in northern hemisphere lakes that are warming in response to climate change. To address the effect of warming waters on coregonine reproduction we experimentally evaluated different embryo incubation temperatures on post-hatching survival, growth, and critical thermal maximum of larval cisco (Coregonus artedi) sampled from lakes Superior and Ontario. Embryos were incubated at water temperatures of 2.0, 4.4, 6.9, and 8.9 °C to simulate present and increased winter temperatures, and hatched larvae were reared in a common environment. For the populations from both lakes, larval survival and critical thermal maximum were negatively related to incubation temperature, and larval growth was positively related to incubation temperature. The magnitude of change across incubation temperatures was greater in the population sampled from Lake Superior than Lake Ontario for all traits examined. The more rapid decrease in survival and critical thermal maximum across incubation temperatures for larval cisco in Lake Superior, compared to those from Lake Ontario, suggests that Lake Superior larvae may possess a more limited ability to acclimate to and cope with increasing winter water temperatures. However, the rapid increase in growth rates across incubation temperatures in Lake Superior larvae suggests they could recover better from hatching at a small length induced by warm winters, as compared to Lake Ontario larvae. Our results suggest propagation and restoration programs may want to consider integrating natural habitat preferences and maximizing phenotypic variability to ensure offspring are set up for success upon stocking.

淡水白鲑（Salmonidae Coregoninae）是在北半球因气候变化而变暖的湖泊中具有生态和社会经济重要性的冷变温鱼类。为了解决变暖的水域对 coregonine 繁殖的影响，我们通过实验评估了不同的胚胎孵化温度对幼虫 cisco ( Coregonus artedi ) 的孵化后存活、生长和临界热最大值的影响。) 从苏必利尔湖和安大略湖取样。胚胎在 2.0、4.4、6.9 和 8.9°C 的水温下孵化，以模拟当前和增加的冬季温度，孵化的幼虫在普通环境中饲养。对于两个湖泊的种群，幼虫存活率和临界热最大值与孵化温度呈负相关，幼虫生长与孵化温度呈正相关。对于所有检查的性状，从苏必利尔湖采样的种群中孵化温度变化的幅度大于安大略湖。与安大略湖的幼虫相比，苏必利尔湖的幼虫cisco在孵化温度下的存活率和临界热最大值下降得更快，表明苏必利尔湖幼虫可能具有更有限的适应和应对冬季水温升高的能力。然而，与安大略湖幼虫相比，苏必利尔湖幼虫在孵化温度范围内生长速度的快速增加表明，它们可以从温暖的冬季诱导的小长度孵化中恢复得更好。我们的结果表明，繁殖和恢复计划可能需要考虑整合自然栖息地偏好和最大化表型变异性，以确保后代在放养后获得成功。