Incorporating vertical movement of fishes in habitat use models

摘要: 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 …