Natural mortality estimations for beaked redfish (Sebastes mentella) - A long-lived ovoviviparous species of the Northeast Arctic

Article Fisheries

Northwest Atlantic redfish science priorities for managing an enigmatic species complex

Noel G. Cadigan et al.

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES (2022)

Article Fisheries

Upgrading from M version 0.2: An application-based method for practical estimation, evaluation and uncertainty characterization of natural mortality

Jason M. Cope et al.

Summary: Estimating natural mortality is a challenging task, but it is an important measure for understanding life history. Direct and indirect methods are used to estimate this parameter, and the Natural Mortality Tool aims to combine multiple empirical estimators into one application. Comparing these estimators can help identify inconsistencies in life history values and promote transparent decision-making.

FISHERIES RESEARCH (2022)

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Article Fisheries

Development and considerations for application of a longevity-based prior for the natural mortality rate

Owen S. Hamel et al.

Summary: The natural mortality rate M is a key parameter for estimating the productivity of a fish stock, but it is difficult to estimate accurately due to its correlation with other parameters, variation in population dynamics, data acquisition challenges, and factors like aging error. Meta-analytical approaches that relate M to other life history parameters are commonly used to provide estimates or Bayesian priors for M. Longevity, represented by the maximum observed or estimated age, is one of these life history parameters most directly linked to M. Considering age data and factors influencing its quality is important when using the relationship between maximum age and M derived from meta-analytical methods.

FISHERIES RESEARCH (2022)

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Article Multidisciplinary Sciences

Improving the gnomonic approach with the gnomonicM R-package to estimate natural mortality throughout different life stages

Josymar Torrejon-Magallanes et al.

Summary: The study introduces an improved gnomonic approach for estimating natural mortality in different life stages of marine stocks using the gnomonicM package. This package offers deterministic or stochastic approaches to estimate M rates and allows for the incorporation of auxiliary information for calibrating estimates. The gnomonicM package provides a reliable and versatile tool for estimating natural mortality and can be applied to various ontogenetic developmental stages.

PEERJ (2021)

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Article Fisheries

Scrabbling around for understanding of natural mortality

J. G. Pope et al.

Summary: The authors have collaborated for 40 years on various projects related to fisheries and marine ecosystems, focusing on the role of natural mortality (M) in fish stocks. Their research shows that predation mortality (M2) is a significant factor for North Sea fish species, with variations by age and year challenging the assumption of constant M. The study suggests a potentially universal formula for M2 that is subject to further testing and calibration against real-world data.

FISHERIES RESEARCH (2021)

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Article Fisheries