Consulta: subjectFacets:"Yield predictions"
Registros recuperados: 6
Data/hora: 08/06/2024 09:40:32

Analysis of the potential impact of several management measures for eastern Atlantic bluefin tuna on the basis of yield per recruit
Provedor de dados: 5
Autores: Arrizabalaga, Haritz; Restrepo, Victor; Fromentin, Jean-marc; Ortiz De Urbina, J M.
A standard yield per recruit (YPR) analysis is used to analyse the effects of minimum size regulations and time area closures on bluefin tuna from the eastern stock (east Atlantic and Mediterranean). Analyses were based on a fishing mortality vector computed over the period 1990-1994 for which data were more reliable and VPA (performed during the 2002 stock assessment) showed a relatively good convergence. This fishing mortality vector was modified according to some combinations of minimum size regulations and time area closures. It is concluded that: (i) PSmed is the main contributor to catch at age in the range of ages 1-13; (ii) The minimum size regulations considered would increase the YPR more than the time area closures, but these would enhance SPR...
Tipo: Text
Palavras-chave: Yield/recruit; Yield predictions; Size limit regulations; Time-area closures; Bluefin tuna.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00192/30329/28806.pdf

Effect of minimum size regulations on east bluefin tuna (Thunnus thynnus L.) yield pe recruit
Provedor de dados: 5
Autores: Restrepo, Victor; Arrizabalaga, Haritz; Ortiz De Urbina, J M; Fromentin, Jean-marc.
A standard yield per recruit (YPR) analysis is used to analyse the effects of minimum size regulations on bluefin tuna from the Eastern stock (East Atlantic and Mediterranean). Analyses were based on a selectivity vector computed over the period 1990- 1994 for which data were more reliable and VPA (performed during the 2002 stock assessment) showed a relatively good convergence. This selectivity vector was modified according to different minimum size regulations and implementation error levels. It is concluded that: (i) perfect implementation of the size limit regulation adopted in 2004 would increase YPR by 4.3% relative to the size limit adopted in 2002, and by 8.8% relative to the pattern realized in the early 1990s; (ii) YPR is however expected to...
Tipo: Text
Palavras-chave: Yield/recruit; Yield predictions; Size limit regulations; Bluefin tuna.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00194/30545/28964.pdf

Resultados preliminares de las actividades de prospección de calamar Illex argentinus en el Golfo San Matías
Provedor de dados: 20
Autores: Morsan, E.M.; Rubinich, J.P.
Se presentan los resultados de las actividades de prospección pesquera de calamar Illex argentinus en el Golfo San Matías durante el mes de agosto de 2001. Siguiendo los criterios y metodología utilizados en los años previos se autorizó el ingreso al caladero de los BP poteros "Orion II" y "Gloria del Mar I" con el objeto de localizar bancos de calamar y evaluar su rendimiento a la explotación. Los rindes CPUE y la captura nominal diaria observada luego de aproximadamente 10 días de faena indicaron la existencia de concentraciones de calamar de alta densidad y elevados rendimientos pesqueros. Las concentraciones no mostraron signos de declinación en su abundancia relativa a pesar del esfuerzo intensivo de los dos buques autorizados. Se recomienda habilitar...
Tipo: Report
Palavras-chave: Fishery resources; Exploratory fishing; Cephalopod fisheries; Yield predictions; Exploratory fishing; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_2759; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 2001
URL: http://hdl.handle.net/1834/3724

Aplicación preliminar del análisis de rendimiento por recluta al efectivo pesquero de merluza común (Merluccius hubbsi) del Golfo San Matías
Provedor de dados: 20
Autores: Morsan, E.M.; González, R.A.
El presente informe ha sido confeccionado con el objeto de asisitir en forma expedita a las Autoridades Provinciales en la adecuación y actualización de las pautas de manejo de la pesquería de merluza común Merluccius hubbsi que se desarrolla en la Jurisdicción Provincial (Golfo San Matías).
Tipo: Report
Palavras-chave: Yield/recruit; Yield predictions; Stock assessment; Fishery management; Stock assessment; Fishery management; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 1998
URL: http://hdl.handle.net/1834/3713

Los recursos demersales de la Plataforma Continental del Ecuador. Parte dos. Producción potencial y recomendaciones para la utilización del recurso de pesca blanca en el Ecuador
Provedor de dados: 20
Autores: Herdson, D.; Rodríguez, W.; Martínez, J.
The stock estimates obtained during the demersal fish resources survey in 1980-1985 were used to estimate the potential yields of demersal stocks of the Ecuadorian Continental Shelf. The difficulties of predicting yields for multispecies fisheries are discussed and modified version of the Gulland model was adopted. The potential realizable yields for multispecies fisheries are discussed and a modified version of the Gulland model was adopted. The potential realizable yield was calculated to be between 15,000 t and 20,000 t per year, of which 2,000 t is good quality fish, 5,000 t per year of small and medium fish and 8,000 t of gurnards. The majority of these resources are at present being fished at around their optimum levels and any further developments...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Continental shelves; Yield predictions; Exploitation; Demersal fisheries; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1985
URL: http://hdl.handle.net/1834/3227

Seychelles demersal fishery an analysis of data relating to four key demersal species
Provedor de dados: 20
Autores: Mees, C. C.
Seychelles demersal fishery is described based on historic catch and effort data, and on biological studies of four key species: Batrican (Pristipomoides filamentosus), Job Gris (Aprion virescens), Bourgeois (Lutjanus sebae), and Maconde (Epinephelus chlorostigma).  During the period 1985 - 1990 demersal species formed on average 33_310= of the total annual landings of the local fishing fleet.  Schooners and whalers were the most important boat types engaging in this fishery, and more recently, a mother ship dory fishing operation. Demersal species constituted 77_310= of all local fish exports over this period. In 1990 approximately 2,000 tonnes of demersal species were landed of which 500 tonnes were exported.  Lutjanids comprised 62_310= of the demersal...
Tipo: Report
Palavras-chave: Demersal fisheries; Fishery data; Fish catch statistics; Catch/effort; Yield predictions; Catch composition; Pristipomoides filamentosus; Aprion virescens; Lutjanus sebae; Epinephelus chlorostigma.
Ano: 1992
URL: http://hdl.handle.net/1834/5114