Graduate Project
 

Length-based fish stock assessment in Senegal

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  • Global Graduates/Oregon International Internship Program offered an internship position working in Senegal with the Institut Senegalais de Recherches Agricoles (ISRA) and the Natural Resource Based Agricultural Research (NRBAR). The author of this paper was accepted for this internship and lived and worked in Senegal from October 1 through December 15, 1996. I am a masters degree candidate in the Marine Resource Management program at Oregon State University, and I worked as an intern with the Centre de Recherches Ocdanagraphiques Dakar- Thiaroye (CRODT), which falls under the jurisdiction of ISRA. The original proposal for the internship outlined a plan to analyze catch per unit effort data for the Senegalese artisanal fisheries as well as to identify points of conflict between the artisanal and industrial fisheries. Upon arrival in Senegal and after preliminary meetings with CRODT researchers, the internship goals were adjusted to be more in line with the needs of the CRODT. The revised proposal for the internship specified that I would develop a method for making the large amounts of length frequency data from the artisanal fishery that the CRODT has collected over the last 20 years amenable to analysis by the software package FiSAT (FAO-ICLARM Stock Assessment Tools), developed jointly by the FAO (Food and Agriculture Organization of the United Nations) and ICLARM (International Center for Living Aquatic Resources Management). In addition, acting upon a suggestion from the symposium "L'EVALUATION DES RESSOURCES EXPLOITABLES PAR LA PECHE ARTISANALE", henceforth referred to as the 1993 Dakar symposium, a second internship goal was the organization of a workshop on the use and application of FiSAT. This report descibes the marine fisheries in Senegal. It includes a brief description of the oceanic conditions as well as a general review of length-based stock assessment. It concludes with observations that I made while an intern at the CRODT, as well as recommendations for rectifying the problems that were observed. The methodology that was developed for transforming the CRODT's length data into a format that can be imported into FiSAT is included as an appendix.
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