## Abstract

In the corrected Leslie-DeLury catch-per-unit-effort method, estimation of the corrected cumulative catches causes the underlying model to be an errors-in-covariates structural model with a nondiagonal dispersion matrix. This violates the assumptions of regression and causes the corrected Leslie-DeLury method to give biased estimates of the population size and its variance. Generalized least squares and a controlled variables design were used to resolve these difficulties, obtain the minimum-variance unbiased linear estimator, and compute unbiased variance estimates. The method was applied to sockeye salmon fingerlings (Oncorhynchus nerka) netted in a hatchery pond. For these data, the corrected Leslie-DeLury method underestimates the standard error of the population size by 41%. -from Authors

Original language | English |
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Title of host publication | Canadian Journal of Fisheries and Aquatic Sciences |

Pages | 818-823 |

Number of pages | 6 |

Volume | 46 |

Edition | 5 |

State | Published - Dec 1 1989 |

Externally published | Yes |

## ASJC Scopus subject areas

- Environmental Science(all)
- Earth and Planetary Sciences(all)