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Registros recuperados: 8
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Desarrollo de un modelo bioeconómico para el manejo integral de un recurso pesquero OceanDocs
Bertolotti, M.I.; Verazay, G.A.; Abal, H.J..
A deterministic single-species bioeconomic model is developed in order to provide an integral fishery management. This model is structured by age, in order to simulate the effects of natural and fishing mortalities, with simple economic assumtions. Fishing mortality is estimated through the fishing effort expressed by fishing hours or by HP per fishing hours. Biological underfishing and overfishing are analyzed from the estimated economic equilibrium for period under study.
Tipo: Journal Contribution Palavras-chave: Fishery economics; Economic models; Fishery management; Fishery management; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 1988 URL: http://hdl.handle.net/1834/1965
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Estratificación de la flota industrial de buques fresqueros y estimación de los rendimientos OceanDocs
Bertolotti, M.I.; Pagani, A.N.; Hernandez, D.R.; Buono, J.J..
In order to increase knowledge about the ice chilling fleet and to explain the relationship between structural variables and yields, a simplified model was developed. The fleet was classified in three homogeneous strata. Stratum I includes the smallest ships, with a catch composition equal to that of the large coastal fishing vessels. The stratum yields decreased in 1997 and 1998. Strata II and III have common hake as the main target of catches. Yields of those strata showed a continuous decrease as of 1994/1995. Therefore, the species was replaced by other fish originally caught by other fleets. These two last strata are more vulnerable to overfishing of traditional coastal and demersal fisheries.
Tipo: Book Section Palavras-chave: Fishery economics; Overfishing; Fish catch statistics; Yield; Fishing vessels; Overfishing; Fishing vessels; Http://aims.fao.org/aos/agrovoc/c_34068; Http://aims.fao.org/aos/agrovoc/c_2954.
Ano: 2001 URL: http://hdl.handle.net/1834/2586
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Estratificación y análisis de la eficacia y la eficiencia de la flota costera de pequeña escala perteneciente a la Sociedad de Patrones Pescadores del puerto de Mar del Plata. OceanDocs
Errazti, E.; Hernandez, D.R.; Bertolotti, M.I.; Buono, J.J..
This chapter includes an economic analysis of the small scale fleet of the Mar del Plata harbour, Buenos Aires Province, Argentina. The original study was carried out at the request of the Skippers Fisheries Society to find out the relative efficacy and efficiency of homogeneous groups of associated vessels. Based on the information available, to tune the observed data, assess the relative efficacy and estimate the relative economic efficiency of the fleet, an ad hoc model was designed. Length, gross registered tonnage, engine power and number of crew members were considered and analyzed as structural variables for 1995, 1996 and 1997. No changes in variables for the period were observed so, the efficacy and efficiency analysis was carried out for the year...
Tipo: Book Section Palavras-chave: Fishing vessels; Fishery economics; Coastal fisheries; Yield; Mathematical models; Fishing vessels; Coastal fisheries; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_2954; Http://aims.fao.org/aos/agrovoc/c_1696; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 2001 URL: http://hdl.handle.net/1834/2585
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Estratificación y estimación de los rendimientos de la flota de buques procesadores congeladores arrastreros. OceanDocs
Bertolotti, M.I.; Hernandez, D.R.; Pagani, A.N.; Castañeda, M.F..
In order to better understand the behaviour of the trawler processing freezer fleet in the Argentine Sea, an analysis of yields and structural characteristics for the 1989-98 period was carried out. The relationship between structural variables and yield expressed in kilos per day was explained with a simplified asymptotic model. The fleet was divided into four homogeneous strata. Common hake is the target of stratum I and stratum II which are deeply affected by overfishing of the species. As of 1993, in stratum III, common hake was replaced by other pelagic and demersal species, mainly hoki. In fleet stratum IV southern blue whiting and hoki were caught. Catches of the latter increased during the last three years.
Tipo: Book Section Palavras-chave: Trawlers; Factory ships; Yield; Mathematical models; Fish catch statistics; Trawlers; Factory ships; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_7880; Http://aims.fao.org/aos/agrovoc/c_10732; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 2001 URL: http://hdl.handle.net/1834/2584
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Flota de altura-breve reseña de la evolución histórica y operatividad durante el período 1981/1982 OceanDocs
Bertolotti, M.I.; Cabut, D.A..
This work was carried out in order to analize the ship incorporation history to the Argentine fishery fleet and the ship building policies in Argentine shipyards and ship importations. From fresher trawler fleet and freezer trawler fleet analysis we estimated optimun catch, possible catch, and natural stock for each fleet. A modern fresher fleet might reach the present value of the optimun catch, but it would not satisfy the total inshore fish factories demand unless equitable ratio between the optimun catch capacities of the fresher trawler fleet and the freezer trawler fleet be established.
Tipo: Journal Contribution Palavras-chave: Fishing vessels; Fishing vessels statistics; Fishery economics; Fishing vessels; Http://aims.fao.org/aos/agrovoc/c_2954.
Ano: 1986 URL: http://hdl.handle.net/1834/2039
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Flota pesquera Argentina. Evolucion 1960-1998 con una actualizacion al 2000. OceanDocs
Bertolotti, M.I.; Verazay, G.A.; Pagani, A.N.; Errazti, E.; Buono, J.J..
The analysis of the Argentine fishing fleet (SW Atlantic) evolution as of 1960 allows to explain the major causes of expansion, the crisis in the fisheries and the structural changes of the fleet during the 90's. Different fleet classification criteria focused on fishing capacity, fish landing composition, yields and productivity indices are described. The expansion cycles were associated to the incorporation of fishing vessels, while the 1960-1989 crisis originated in domestic and international economic crisis and changes in the strategy pattern of the fishing countries. The latter was related to overfishing of traditional coastal and demersal fisheries and to the full exploitation of resources such as squid, blue whiting and toothfish incorporated to the...
Tipo: Book Section Palavras-chave: Fishing vessels; Fishery economics; Fishing vessels statistics; Overfishing; Landing statistics; Catch/effort; Yield; Fishing vessels; Overfishing; Http://aims.fao.org/aos/agrovoc/c_2954; Http://aims.fao.org/aos/agrovoc/c_34068.
Ano: 2001 URL: http://hdl.handle.net/1834/2587
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Metodología para definir alternativas de programación lineal. Parte 1: Utilización de un modelo de programación lineal OceanDocs
Bertolotti, M.I.; Abal, H.J.; Piergentili, G.V.; Vecino, M.S..
The objective of this paper is to maximize a function of the value added of the Argentine fishery system, in order to provide alternatives for the management and development of the fishery sector.
Tipo: Journal Contribution Palavras-chave: Mathematical models; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 1987 URL: http://hdl.handle.net/1834/2007
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Procesamiento y comercialización de la anchoíta (Engraulis anchoita) del Mar Argentino OceanDocs
Bertolotti, M.I.; Manca, E.A..
The anchovy (E.anchoita)is one of the most abundant species in the Argentine Sea. Distributed in between latitudes 34°S and 48°S, it has only been caught, traditionally, along the coasts of Buenos Aires Province - particulary in the vicinity of Mar del Plata. Anchovy-like items are exported both to producing and consuming countries. During the last three years markets have been lost. In order to regain them and to develop new ones, particularly in Europe it shall be necessary to compete with products that are well-priced and of the high quality and have a substantial aggregate value. The anchovy domestic market could be enlarged- with certain limitations- be developing new products.
Tipo: Journal Contribution Palavras-chave: Marketing; Processing fishery products; Marketing; Http://aims.fao.org/aos/agrovoc/c_4620.
Ano: 1986 URL: http://hdl.handle.net/1834/2021
Registros recuperados: 8
Primeira ... 1 ... Última
 

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