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| Registros recuperados: 10 | |
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| Hutton, T.; Sumaila, U.R.. |
| The cooperative versus non-cooperative management of the South African west coast hake stock is explored using game theoretic modelling in conjunction with an age-structured model. The age-structured model is used to produce a physical flow account for input into national resource accounts. Between 1989 and 1998, the average catch of hake on the west coast was 92000 tons, most of which was harvested by the demersal trawl sector. The physical flow account indicates that the conservative re-building management strategy pursued for the fishery over the same time period mentioned above, has resulted in a 29% increase in the demersal trawl catch over the last decade. We simulated the effects of alternative quota restrictions on two fishing sectors (the... |
| Tipo: Working Paper |
Palavras-chave: Hake fisheries; Economic analysis. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/873 |
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| Otero, H.O.. |
| The statistics provided by the Argentinean Fishing Vessel and the biological data collected by scientist in the last eleven years, allow us to estimate different aspects of the population dynamics of the common hake (Merluccius hubbsi). This work deals with the relative abundance and the maximal sustainable yield of this species, considering the bonaerense stock of the Southewest Atlantic. Analyzing the effective fishing density, concluding remarks can be made. The high catches of 1967 (more than 600.000 tons.)made by the Russian Fleet, affected the fishing density in 1968. Since 1969, the resource recovered the high density level as a consequence of a decrease in the catches and in the fishing effort, but vulnerability of the stock is shown. |
| Tipo: Journal Contribution |
Palavras-chave: Catch/effort; Potential yield; Hake fisheries. |
| Ano: 1980 |
URL: http://hdl.handle.net/1834/2061 |
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| Otero, H.O.. |
| The statistics provided by the Argentinean Fishing Vessel and the biological data collected by scientist in the last eleven years, allow us to estimate different aspects of the population dynamics of the common hake (Merluccius hubbsi). This work deals with the relative abundance and the maximal sustainable yield of this species, considering the bonaerense stock of the Southewest Atlantic. Analyzing the effective fishing density, concluding remarks can be made. The high catches of 1967 (more than 600.000 tons.)made by the Russian Fleet, affected the fishing density in 1968. Since 1969, the resource recovered the high density level as a consequence of a decrease in the catches and in the fishing effort, but vulnerability of the stock is shown. |
| Tipo: Journal Contribution |
Palavras-chave: Catch/effort; Potential yield; Hake fisheries. |
| Ano: 1980 |
URL: http://hdl.handle.net/1834/5456 |
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| Pájaro, M.; Macchi, G.J.; Ehrlich, M.D.. |
| Batch fecundity and spawning frequency of Argentine hake inhabiting Patagonian waters south of 41° S were estimated using monthly samples collected during the December 2000-March 2001 reproductive season and at the end of the March 2002 spawning period. Batch fecundity was fitted to a power function of total length and a linear function of ovary-free female weight with values ranging between 100,000 (32 cm total length) and 2,300,000 (87 cm total length) hydrated oocytes. Batch and relative fecundity showed variations during the spawning season with a marked decrease towards the end of the reproductive period (March). The spawning frequency, which ranged between 0.10 and 0.15, was estimated from the proportion of females with day-1 postovulatory follicles... |
| Tipo: Journal Contribution |
Palavras-chave: Spawning seasons; Ovaries; Hake fisheries; Ovaries; Http://aims.fao.org/aos/agrovoc/c_5456. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1566 |
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| Hutton, T.; Raakjaer Nielsen, J.; Mayekiso, M.. |
| As part of a global comparative study of user-participation in fisheries management, a neo-institutional economic framework analysis is applied to the South African Deep-sea Hake Fishery to evaluate past and present co-management arrangements. It is postulated that the comprehensive partnerships that exist will struggle to remain legitimate and functional during major changes in the access-rights regime. The government is redistributing quota to new entrants and previously-disadvantaged South Africans, resulting in competition between the established demersal trawl fleet and a new longline sector for access rights. The established industry is currently undertaking restructuring via investment schemes, joint ventures and share agreements. The relationship... |
| Tipo: Proceedings Paper |
Palavras-chave: Hake fisheries; Capture fishery economics. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/720 |
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| Cotrina, C.P.; Cousseau, M.B.. |
| The species of the Genus Merluccius present in argentine waters, Merluccius hubbsi and M.polylepis are similar externally and it is very difficult to separate them in the capture. Knowing the importance of both species from the commercial point of view, and the need of a correct identification, some morphological characteristics have been compared, looking for external differences, useful for the identification on board. The samples have been taken from the total area of distribution of both species in argentine waters. A total of 154 specimen of Merluccius hubbsi and 105 of M.polylepis were analyzed. |
| Tipo: Journal Contribution |
Palavras-chave: Comparative studies; Hake fisheries. |
| Ano: 1980 |
URL: http://hdl.handle.net/1834/2065 |
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| Diop, M.. |
| Résumé L’analyse des échantillons prélevés sur les captures des crevettiers et merluttiers espagnols opérant dans les eaux mauritaniennes entre 1991 et 1994, a montré que ces pêcheries engendrent beaucoup de prises accessoires. Ces dernières varient entre 87% et 89% pour la pêcherie crevettière et dépassent 64% pour la pêcherie merluttière. Le rapport prises accessoires/capture espèce cible varie donc de 7 :1 à 8 :1 pour les crevettiers et se situerait à environ 2 :1 pour les merluttiers. Les prises accessoires sont constituées principalement de poissons démersaux (représentés essentiellement par les sparidés), de céphalopodes (poulpe, seiches et calmar) et de petits pélagiques. Les poissons démersaux sont largement dominants. |
| Tipo: Journal Contribution |
Palavras-chave: Shrimp fisheries; Hake fisheries; Bycatch; Http://aims.fao.org/aos/agrovoc/c_15949. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/230 |
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| Registros recuperados: 10 | |
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