A bioeconomic model for Mediterranean fisheries, the hake off Catalonia (western Mediterranean) as a case study

Lleonart, Jordi; Maynou, Francesc; Recasens, Laura; Franquesa, Ramón

doi:10.3989/scimar.2003.67s1337

Cited by 82 publications

(83 citation statements)

References 9 publications

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“…takes place occasionally and opportunistically, but it is considered rather rare (Santojanni et al, 2005). The bioeconomic model called MEFISTO is a multispecies, multifleet and multigear simulation model described in detail in Lleonart et al (1999Lleonart et al ( , 2003. Starting from an initial condition, the simulation model incorporates the trajectory of resources and fishing fleets, disaggregated by vessels or homogeneous vessel classes, and computes the most probable future trajectory when some parameters in the model are changed, simulating management actions.…”

Section: Methodsmentioning

confidence: 99%

“…The MEFISTO model has been previously applied to a case study of hake in Catalonia (western Mediterranean), as shown in Lleonart et al (2003), but it was later applied to red shrimp (Aristeus antennatus) fisheries in the Catalan sea and to carry out an analysis of hand-line and gillnet coastal fisheries of Pernambuco State (Mattos et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, bioeconomic models are employed to provide directions for fishery management (Defeo and Seijo, 1999;Ulrich et al, 2002;Lleonart et al, 2003;Maynou et al, 2006;Mattos et al, 2006). These tools quantify the effects arising from the application of specific management measures to particular stocks, to simulate different scenarios and to obtain an evaluation of risks associated with different levels of resource exploitation.…”

Section: Introductionmentioning

confidence: 99%

“…The model applied here, MEFISTO (Mediterranean Fisheries Management Tools, Lleonart et al, 2003), was developed specifically for Mediterranean Sea fisheries. Before employing this model, it is important to understand fishing fleet dynamics and the main characteristics of the model that allow its application to fishery of small pelagics in the northern Adriatic sea.…”

Section: Introductionmentioning

confidence: 99%

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Application of a bioeconomic model for supporting the management process of the small pelagic fishery in the Veneto Region, northern Adriatic Sea, Italy

Silvestri¹,

Maynou²

2009

Sci. Mar.

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SUMMARY:We explore the sustainability of the small pelagics fishery in the northern Adriatic sea, northeastern Italy, by means of a bioeconomic simulation model. This model reproduces the biological and economic conditions in which the fisheries occur. Starting from an initial condition (2004), the simulation model incorporates the biological and economic processes of the resources and the fishing fleet and computes the most probable future trajectory of the system under different management conditions. We analysed the projection of selected indicators (biomass, recruitment, catches, profits) under four different management scenarios based on effort control, and we assessed the performance of these management measures against the current situation. The four scenarios were: i) increase in fuel price, ii) reduction in fuel price, iii) limiting the number of days at sea, and iv) extending the fishing period. Each management event was introduced in the third year of the simulation. For each scenario a stochastic simulation was carried out. Our results show that the impact of each management measure tested was not homogeneous across the fleet. In particular, comparatively smaller vessels generally display narrower profit margins and tend to be more sensitive to negative shocks, reinforcing the idea that management measures should be calibrated by stratifying the fleet before implementation.Keywords: Northern Adriatic, bioeconomic model, small pelagics, sardine, anchovy, mid-water pair trawl. RESUMEN: Aplicación de un modelo bioeconómico de apoyo a la gestión de la pesquería de pequeños pelági-cos en la región del Véneto, Adriático norte, Italia. -Exploramos la sostenibilidad de la pesca de pequeños pelá-gicos en el Adriático norte, Italia nor-oriental, mediante un modelo bioeconómico de simulación. El modelo reproduce las condiciones biológicas y económicas en las que operan las pesquerías. A partir de una situación inicial (2004), el modelo de simulación incorpora los procesos biológicos y económicos de los recursos y de las flotas pesqueras y permite calcular las trayectorias futuras más probables del sistema bajo distintas condiciones de gestión. Analizamos la proyección de indicadores seleccionados (biomasa, reclutamiento, capturas, beneficios) bajo cuatro escenarios de gestión diferentes, basados en el control del esfuerzo, y evaluamos los resultados de estas medidas de gestión frente a la situación actual. Los cuatros escenarios fueron: i) aumento del precio del carburante, ii) reducción del precio del carburante, iii) limitación del número de días de pesca, y iv) extensión del período de pesca. Los eventos se introdujeron en el tercer año de la simulación. Los resultados muestran que cada medida tiene un impacto que no es homogéneo para toda la flota, en particular, los barcos más pequeños muestran generalmente margen de beneficios más bajos y tienden a ser más sensibles a los shocks negativos, de manera que es necesario calibrar las medidas de gestión estratificando la flota antes de su implementación.Palabra...

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of a bioeconomic model for supporting the management process of the small pelagic fishery in the Veneto Region, northern Adriatic Sea, Italy

Silvestri¹,

Maynou²

2009

Sci. Mar.

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show abstract

“…In the Catalan and northern Tyrrhenian seas, recruits and juveniles are caught by bottom trawls, while the adult population, representing a percentage of between 37 and 46% of the total landings , is also caught with longlines and gillnets (Aldebert et al, 1993;Sbrana et al, 2007). In both study areas, as in many zones of the Mediterranean, growth overfishing can be assumed (the hake stock shows signals of growth overexploitation) (Aldebert et al, 1993;Aldebert and Recasens, 1996;Lleonart et al, 2003;FAO, 2005).…”

Section: Introductionmentioning

confidence: 99%