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- Title
SPAM (Sex-Structured Assessment Model): a stock assessment model for Pandalus stocks.
- Authors
Drouineau, Hilaire; Savard, Louise; Desgagnés, Mathieu; Duplisea, Daniel; Quinn, Terrance
- Abstract
Despite the economic importance of shrimp fisheries, few analytical tools have been developed to assess their stocks, and traditional stock assessment models are not appropriate because of biological specificities of Pandalus species. In this context, we propose SPAM (Sex-Structured Pandalus Assessment Model), a model dedicated to protandric hermaphrodite pandalids stock assessment. Pandalids are difficult to assess because the cues affecting sex change, size at recruitment, and mortality variability are not well understood or characterized. The novel structure of the model makes it possible to adequately describe variability in natural mortality by stage and in time, as well as variability in size at sex change and recruitment. The model provides traditional stock assessment outputs, such as fishing mortality estimates and numbers of individuals, and provides in addition yearly natural mortality estimates. The model is applied to the exploited shrimp stock of in Sept-Îles (Québec, Canada) as an illustrative example of the utility of the approach.
- Subjects
QUEBEC (Province); FISH population measurement; FISHERY management; SHRIMP fisheries; PANDALUS; INTERSEXUALITY; SEX change in animals; ECONOMICS; FISHES
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2012, Vol 69, Issue 4, p770
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/f2012-011