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Comparing data-limited methods for resources in the Spanish Atlantic waters: advantages and limitations

AuthorsPennino, Maria Grazia; Abad, Esther; Alonso-Fernández, Alexandre CSIC ORCID; Cousido, Marta; Cerviño, Santiago; Ibaibarriaga, Ane; Iriondo, Ane; García, Dorleta; Gil, Juan; González, Isabel; Otero, Jaime CSIC ORCID; Rincón, Margarita; Rodríguez, Cristina CSIC ORCID; Sampedro, Paz; Urtizberea, Agurtzane; Valeiras, J.; Vila, Yolanda
Issue Date2020
CitationInternational Symposium on Marine Sciences (2020)
AbstractSustainable harvesting of marine populations is achieved through management that relies on assessment of their exploitation and population status. However, most of fish stocks worldwide lack adequate data to assess their status using conventional methods of stock assessment. In addition, the growing requirements to set scientifically based catch limits in several countries, and growing consumer demand for sustainable managed fish have spurred an emerging field of methods for estimating Maximun Sustainable Yield proxies, overfishing thresholds and setting catch limits for stocks with limited data. Building confidence in data-limited assessment methods require evaluation using simulation studies and validation using real data. Within this context, we have selected 3 different data-limited methods, which are supported by the International Council for the Exploration of the Sea's (ICES) for the evaluation of data-limited stocks in the Atlantic waters such as: (1) the stochastic surplus production model in continuous time (SPiCT), (2) the length-based spawning potential ratio (LB-SPR) and (3) the length-based indicators (LBI). We have applied these three methods to a set of different species in a data-poor situation in the Spanish Atlantic waters. In particular we selected species that have different biology and traits as well as fishery pressure to test the goodness of fit of these models. Species selected were the pollack (Pollachius pollachius), small-spotted catshark (Scyliorhinus canicula), common octopus (Octopus vulgaris), southern shortfin squid (Illex coindetii), norway lobster (Nephrops norvegicus) and blackspot seabream (Pagellus bogaraveo). Comparison and evaluation of the performance of these models is presented as well as advantages and limitations. We argue that having models with different assumptions implemented on species with different life histories provide a useful overview of the proposed methods as well as on the status of the selected stocks
DescriptionPoster.-- VII International Symposium on Marine Sciences, 1-3 July 2020
Appears in Collections:(IIM) Comunicaciones congresos
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