Evaluating probability sampling strategies for estimating redd counts : an example with Chinook salmon ( Oncorhynchus tshawytscha )

@inproceedings{Courbois2008EvaluatingPS,
  title={Evaluating probability sampling strategies for estimating redd counts : an example with Chinook salmon ( Oncorhynchus tshawytscha )},
  author={Jean-Yves P. Courbois and Stephen L. Katz and Daniel J. Isaak and Eleanor A. Steel and Russell F. Thurow and A. Michelle Wargo Rub and Tony Olsen and Chris E. Jordan},
  year={2008}
}
Precise, unbiased estimates of population size are an essential tool for fisheries management. For a wide variety of salmonid fishes, redd counts from a sample of reaches are commonly used to monitor annual trends in abundance. Using a 9-year time series of georeferenced censuses of Chinook salmon (Oncorhynchus tshawytscha) redds from central Idaho, USA, we evaluated a wide range of common sampling strategies for estimating the total abundance of redds. We evaluated two sampling-unit sizes (200… CONTINUE READING