Collaborating with recreational fishers to inform fisheries management: Estimating population abundance for an iconic freshwater crayfish

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Abstract

Can the abundance of fish populations be effectively determined by the collection of scientific research with support from recreational fishers? Collecting and analysing fishing data from recreational fishers to aid management are not new; however, engaging fishers in a scientific survey design to produce specific population estimates is rarely undertaken. We engaged recreational fishers to assist with field sampling to provide an estimate Murray Crayfish (Euastacus armatus von Martens, 1866) abundance at three sites on the Edward River which were recently impacted by an extreme blackwater disturbance. Employing mark-resight models, fishers undertook crayfish surveys and produced research data which estimated adult population sizes of Murray Crayfish in the studied reaches ranging between 94.27 ± 24.72 individuals (Below Stevens) and 450.01 ± 175.30 individuals (Twin Rivers). Both the effective undertaking of the mark-resight designs in collaboration with fishers and acquiring population abundance estimates for Murray Crayfish in a river reach are concepts which have not previously been published and are important attributes for the management of aquatic species.

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Zukowski, S., Asmus, M., Whiterod, N., Conallin, A., Campbell, J., Fisher, I., & Bright, T. (2018). Collaborating with recreational fishers to inform fisheries management: Estimating population abundance for an iconic freshwater crayfish. Ecological Management and Restoration, 19(1), 85–88. https://doi.org/10.1111/emr.12290

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