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Título

Critical assessment of the potential of genomic methods to enhance fisheries stock assessment

AutorFernández-Otero, Rosa; Rodríguez-Mendoza, Rebeca CSIC ORCID; Saborido-Rey, Fran CSIC ORCID ; Casas Castaño, Laura CSIC ORCID; Stransky, Christoph
Palabras claveGenomic methods
Fisheries stock assessment
Fecha de publicaciónjul-2022
EditorEuropean Commission
SerieFishGenome-Deliverable 1.4b
ResumenThe status of marine fish stocks needs to be regularly assessed to ensure fishing practices exploit these stocks at sustainable levels. This assessment is based on multiple data types and sources that include catch data, monitoring of fishery landings, biological observers and research surveys, the latest of which provide critical fishery-independent information. Traditional methods to assess the state of fish stocks through scientific surveys have experienced a very slow progress and present recognized shortcomings (Maunder and Piner, 2015). These include a high economic cost coupled with complex logistics, very sparse data in space and time as a direct consequence and a long-time required for treating and analyzing the collected data (Stomatopoulos, 2002). Moreover, some important parameters in fish stock assessment cannot be estimated using traditional methodologies at present. For example, the sex of the younger juveniles cannot be assigned using traditional methods —mainly histology— in those species that lack sexual dimorphism (e.g., Mellon-Duval et al., 2010), despite the importance of sex ratios to evaluate the status of exploited stocks. Similarly, difficulties have been faced when determining the age of individuals of some species, an essential parameter for growth estimates, population dynamic studies and for optimizing the harvesting time (Gursoy et al., 2005). Otoliths of some commercially important fish species such as hake or cod, for instance, have proved unreliable due to the presence of false rings, lack of definition of rings or deposition at irregular intervals (Morales-Nin et al., 1998; Ligas et al., 2011; Hüssy et al., 2010). In this context, High-throughput sequencing (HTS) genomic methodologies can offer the possibility to resolve some of these hurdles and supplement traditional methods used in fisheries assessment. Three HTS methods are considered in FishGenome: Close-kin Mark-Recapture (CKMR), environmental DNA (eDNA) and epigenetics for age determination. The objective of this report is to integrate into a single analysis the critical assessments of the current potential of these genomic methods (i.e., including bioinformatics) to produce equivalent or improved estimates of stock parameters, currently estimated in research surveys, and which allow an enhanced stock assessment.
Descripción31 pages
URIhttp://hdl.handle.net/10261/297270
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FishGenome-D1.4b. HTS methods_CriticalAssessment.pdfDeliverable 1.4b of FishGenome603,46 kBAdobe PDFVista previa
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