Abstract：
Fish telemetry studies now routinely collect positional and depth data, yet analytical approaches that integrate three-dimensional data are limited. Here we apply the potential path volume (PPV) model, a method previously developed to estimate habitat volume based on rates of avian movement, to free-swimming fish. Using a telemetry dataset of white sucker (Catastomus commersonii) from Turkey Lake (Ontario, Canada), we evaluated the effects of the number of spatial positions and different methods of selecting swim speed (vswim), a key parameter for PPV models, on habitat volume estimates. We subsequently compared habitat volume estimates and habitat overlap among white sucker pairs from the PPV models to those calculated using kernel utilization distribution-based approaches. The number of spatial positions in the PPV model had a significant effect on habitat volume estimates, whereas the magnitude of the vswim parameter or its specificity (constant value vs. fish-season specific parameter values) did not affect habitat volume estimates. The PPV method resulted in larger habitat volume estimates and greater habitat overlap estimates among fish pairs relative to those obtained from a three-dimensional kernel utilization distribution method. The PPV model is a useful analytical tool that, by incorporating potential animal movement into habitat use evaluations, can help answer key ecological questions and provide insight into fish space use in a wide range of conservation and management applications.
摘要：
鱼类遥测研究现在例行收集位置和深度数据，然而，整合三维数据的分析方法是有限的。在这里，我们应用潜在路径体积(PPV)模型，一种先前开发的基于鸟类移动速率估计栖息地体积的方法，自由游泳的鱼。使用来自土耳其湖（安大略省，加拿大),我们评估了空间位置数量和选择游泳速度（vswim）的不同方法的影响，PPV模型的关键参数，关于栖息地体积估计。随后，我们将PPV模型中的白色吸盘对之间的栖息地体积估计和栖息地重叠与使用基于内核利用率分布的方法计算的那些进行了比较。PPV模型中的空间位置数量对栖息地体积估计有显著影响，而vswim参数的大小或其特异性(恒定值与鱼类季节特定的参数值）不会影响栖息地体积估计。与从三维核利用分布方法获得的结果相比，PPV方法导致鱼类对之间的栖息地体积估计值更大，栖息地重叠估计值更大。PPV模型是一个有用的分析工具，通过将潜在的动物运动纳入栖息地使用评估，可以帮助回答关键的生态问题，并在广泛的保护和管理应用中深入了解鱼类空间的使用。
