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Principles for estimating natural mortality rate

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Hoenig, J. M., Hearn, W. S., Leigh, G. M. and Latour, R. J. (2025) Principles for estimating natural mortality rate. Fisheries Research, 281 . p. 107195. ISSN 0165-7836

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Article Link: https://doi.org/10.1016/j.fishres.2024.107195

Publisher URL: https://www.sciencedirect.com/science/article/pii/S0165783624002595

Abstract

In contemporary stock assessments there is increasing emphasis on how natural mortality varies with time, age, and space. But, little guidance is available for estimating this parameter. We maintain that in an exploited population, with few exceptions, contrast in fishing mortality in the data is needed to separate fishing mortality from natural mortality. Variability (contrast) in fishing mortality can be over time (inter- or intra-annual), space, and ontogeny. (The exceptions where contrast in fishing mortality is not needed are cases where information is available on population size and total catch.) High contrast in fishing mortality results in enhanced ability to estimate natural mortality. It follows that study design can be manipulated to achieve greater contrast and make more effective use of existing contrast. Integrated stock assessments afford the opportunity to enhance the needed contrast, provided the contrast is modeled explicitly.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Fisheries Queensland
Keywords:Fishing mortality Statistical design Contrast Components of mortality Exploitation rate Population size Total catch
Subjects:Science > Statistics
Science > Statistics > Statistical data analysis
Aquaculture and Fisheries > Fisheries > Fishery resources
Aquaculture and Fisheries > Fisheries > Fishery conservation
Aquaculture and Fisheries > Fisheries > Fishery research
Live Archive:21 Oct 2024 04:43
Last Modified:21 Oct 2024 04:43

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