Multimethod approach to advance provenance determination of fish in stocked systems

Fish stocking occurs in aquatic systems for conservation purposes, to create or enhance recreational fisheries and to enhance wild-catch commercial fisheries. Identifying and quantifying the contribution of stocking efforts to wild populations is crucial to informing these management objectives. Pro...

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Bibliographic Details
Published in:Canadian journal of fisheries and aquatic sciences 2023-09, Vol.80 (9), p.1410-1424
Main Authors: Leahy, Susannah M, Jerry, Dean R, Wedding, Brett B.C, Robins, Julie B, Wright, Carole L, Sadekov, Aleksey, Boyle, Stephen, Jones, David B, Williams, Samuel M, Grauf, Steve, Pavich, Luke, McLennan, Mark, Sellin, Michelle J, Goldsbury, Julie A, Saunders, Richard J
Format: Article
Language:English
Subjects:
Accuracy
Aquatic environment
Barramundi
Environmental aspects
Fish
Fish stocking
Fisheries
Fishing
Genetic analysis
Image processing
Image resolution
Infrared spectra
Infrared spectroscopy
Methods
Microchemistry
Microsatellites
Near infrared radiation
Physiological aspects
Provenance
Stock assessment (Wildlife management)
Tropical environments
White noise
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Summary:Fish stocking occurs in aquatic systems for conservation purposes, to create or enhance recreational fisheries and to enhance wild-catch commercial fisheries. Identifying and quantifying the contribution of stocking efforts to wild populations is crucial to informing these management objectives. Provenance determination methods trade off accuracy, replicability, and costeffectiveness at fishery-relevant scales. We present and assess multiple methods for provenance determination using a case study of barramundi (Lates calcarifer) in the Dry Tropics region of northern Australia. A novel application of near-infrared spectroscopy (NIRS) is compared to two established methods for fish provenance, otolith microchemistry and genetic parentage analysis using microsatellites. The otolith microchemistry method was able to provide extremely high provenance resolution (>99% accuracy). The microsatellite parentage analysis method had a slightly lower overall accuracy (95%), likely as a result of genetic introgression in this region. Provenance determination using otolith NIRS had the lowest overall accuracy (76%). Once limitations regarding spectral noise, image resolution, and sample size are addressed, NIRS may have potential for costeffectively determining provenance in fish.
ISSN:0706-652X
1205-7533
DOI:10.1139/cjfas-2022-0292