Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Choosing whether or not to migrate is an important life history decision for many fishes. Here we combine data from physical captures and detections on autonomous passive integrated transponder (PIT) tag antennas to study migration in an endangered fish, the humpback chub (Gila cypha). We develop hidden Markov mark–recapture models with and without antenna detections and find that the model fit without antenna detections misses a large proportion of fish and underestimates migration and survival probabilities. We then assess survival and growth differences associated with life history strategy and migration for different demographic groups (small male, small female, large male, large female). We find large differences in survival according to life history strategy, where residents had much lower overwinter survival than migrants. However, within the migratory life history strategy, survival and growth were similar for active migrants and skipped migrants for all demographic groups. We discuss some common challenges to incorporating detections from autonomous antennas into population models and demonstrate how these data can provide insight about fish movement and life history strategies.

中文翻译：

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使用来自自主 PIT 标签天线的数据可以更好地理解小科罗拉多河中座头鲸的部分迁移和产卵运动

加拿大渔业和水产科学杂志，提前印刷。
对于许多鱼类来说，选择是否迁移是一个重要的生活史决定。在这里，我们结合了自主无源集成转发器 (PIT) 标签天线的物理捕获和检测数据，以研究濒危鱼类驼背鲢 (Gila cypha) 的迁徙。我们开发了带有和不带有天线检测的隐马尔可夫标记-重新捕获模型，发现没有天线检测的模型拟合错过了很大一部分鱼，并低估了迁移和生存概率。然后，我们评估与不同人口群体（小型男性、小型女性、大型男性、大型女性）的生活史策略和迁移相关的生存和生长差异。我们发现根据生活史策略的生存率存在很大差异，其中居民的越冬生存率远低于移民。然而，在移徙生活史战略中，所有人口群体的活跃移徙者和跳过移徙者的生存和成长情况相似。我们讨论了将自主天线的检测纳入种群模型的一些常见挑战，并展示了这些数据如何提供有关鱼类运动和生活史策略的见解。