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| Registros recuperados: 173 | |
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| Saavedra, A.; Correa, V.; Céspedes, R.; Ojeda, V.; Adasme, L.; Díaz, E.; Oliva, J.; Rojas, P.. |
| El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47º y 51º S. Como parte del proyecto se realizó entre el 13 y el 22 de agosto de 2005 a bordo del B/F Unzen un crucero de prospección orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, estimar la importancia relativa de la fauna acompañante, condiciones reproductivas y tróficas del stock y realizar un análisis de las agregaciones detectadas durante el crucero. Durante el estudio se realizaron 41 lances de pesca de reconocimiento (23 positivos) y 49 transectas acústicas. |
| Tipo: Report |
Palavras-chave: Stock assessment; Echo surveys; Abundance; Biomass; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1848 |
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| Páramo, J.E.; Viaña, J.E.. |
| The objective of the present work was to assess the biomass of Atlantic thread herring (Opisthonema oglin1lm) and the Spanish sardine (Sardinella aurita) in the north area of the Colombian Caribbean sea by means of two acoustic surveys (one in July-August and other in December, 1997). The scientific echosounder used for both surveys was the SIMRAD EK500. Emphasis was made on Atlantic thread herring and Spanish sardine because these small pelagic fish have been the most abundant in previous studies in this area. Systematic sampling using parallel transects perpendicular to the coast was carried out. The transect spacing used was 12 nautical miles. The Elementary Sampling Distance Unit (ESDU) was set in 1 nm. In order to know about the species composition... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_24251. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/3117 |
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| The emphasis of the meeting was placed on bigeye tuna (Thunnus obesus), but a number of the conclusions and recommendations reached apply equally to all tropical tunas. A review of fisheries and available data confirmed that both longline and purse seine fisheries for bigeye tuna have been expanding rapidly over the current decade. There are however major gaps in catch and effort data available, in particular major longline fleets operating from Indonesia and several eastern Indian Ocean ports and some which are engaged in illegal, unregulated and unreported (IUU) fishing. Furthermore, size data for most longline fisheries are generally missing or of doubtful quality. A number of recommendations on research were formulated, dealing with improvements in... |
| Tipo: Working Paper |
Palavras-chave: Fishery statistics; Tuna fisheries; Fishery data; Stock assessment; Tropical environment. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/118 |
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| Girardin, M.. |
| Résumé : Les 6 campagnes de chalutage réalisées en 1987 et 1988 ont permis d’évaluer les indices d’abondance des diverses ressources démersales, essentiellement poisson et céphalopodes, par strate, zone et, pour l’ensemble du plateau continental. Des estimations de biomasse apparente (77'000 tonnes en 1988) et de potentiel maximum exploitable (59'200 t. en 1988) ont aussi été avancées. La comparaison de ces résultats avec ceux des années 1982-1984 a fait ressortir une nette tendance à l’amélioration générale depuis 1987. Si la situation de la zone nord (Cap Blanc) demeure encore préoccupante par rapport à celle du sud, l’abondance globale des ressources du plateau a retrouvé un niveau peu inférieur à celui des années 1982-1983. L’influence probable de... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Stock assessment; Trawling. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/807 |
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| Cordo, H.D.. |
| Catch per unit of effort (CPUE)analysis of the Argentine surimi fleet is a routine work to estimate abundance indices of southern blue whiting Micromesistius australis. Several analysis of this fishery suggest that, as of the years when intensive fishing by foreign and national fleets started, the resource has suffered a marked decline. When calculating the CPUE it is common practice to take into acount only trips and fishing operations with high catches of the target species fishing operations directed to other species are not considered to avoid underestimations. Therefore, in order to include a percentage of catch of the analyzed species higher than a subjective value, available data are filtered. However, because only operations with high yield are... |
| Tipo: Journal Contribution |
Palavras-chave: Catch/effort; Yield; Commercial fishing; Overfishing; Stock assessment; Stock assessment; Overfishing. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/1584 |
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| Wöhler, O.C.; Giussi, A.R.; Hansen, J.E.. |
| Sequential population analysis on Long Tail Hake (Macruronus magellanicus)from the Southwest Atlantic. Years 1985-1995. VPA on the Long Tail Hake (Macruronus magellanicus), based on data covering the years 1985 up to 1995, was performed to assess the current state of the stock. Simulation trials, inducing uncertainty about both the natural mortality rate and recruitment were also accomplished, to evaluate the risk of overfishing which is associated to different fishing alternatives, always under the assumption of a single and closed Long Tail Hake population. CPUE data were not appropriate for tunning, so the traditional VPA has been applied. During the period of study, stock biomass and spawning stock biomass showed an increased trend. Long and short-term... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Fishery management; Catch/effort; Fishing mortality; Overfishing; Biomass; Sexual maturity; Stock assessment; Fishery management; Biomass; Overfishing; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068; Http://aims.fao.org/aos/agrovoc/c_7016. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/1875 |
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| Rico, M.R.; Hernández, D.R.; Carozza, C.R.. |
| Assessment of abundance indexes for whitemouth croaker (Micropogonias furnieri) and brazilian flathead (Percophis brasiliensis) obtained with general linear models: Monte Carlo simulation and analysis of the interactions with the “year” factor. The effect of interactions with the year factor on the annual index of relative abundance obtained with general linear models applied to the cath per unit of effort data of whitemouth croaker and brazilian flathead commercial fleet was evaluated applying the Monte Carlo simulation. Levels on the relative percentage of variance explained by the interactions with the year factor (%RVEAÑO) were determined, above which loss of proportionality between the relative abundance series given by the index and the real series... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Abundance; Catch/effort; Simulation; Commercial species; Coastal fisheries. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5503 |
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| Bernal, C.; Canales, M.; Catasti, V.; Sepúlveda, A.; Ruíz, P.; Alarcón, R.; Núñez, S.; Oyarzún, C.; Gazitúa, S.; Claramunt, G.; Herrera, G.. |
| Se evalúan los stocks desovantes de anchoveta y sardina común mediante la aplicación del método de la producción diaria de huevos, durante la época de máxima actividad reproductiva del año 2003. Se diseñó un crucero de recolección de huevos y se efectuaron capturas de adultos de ambas especies entre la V (33°10’S) y X (41°20’S) Regiones. En la región costera entre la VIII y X Regiones, la condición reproductiva fue monitoreada a través de indicadores macroscópicos (IGS y estados de madurez sexual), indicando que ambas especies habrían iniciado su actividad reproductiva a partir de julio de 2003, con un máximo de actividad observado en septiembre para ambas especies. Desde la flota artesanal con puerto base en Calbuco, se obtuvieron hembras de sardina común... |
| Tipo: Report |
Palavras-chave: Stock assessment; Clupeoid fisheries; Fish eggs; Biomass; Spawning; Spawning populations; Stock assessment; Biomass; Spawning; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_14490. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1695 |
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| Villarino, M.F.; Simonazzi, M.A.; Bambill, G.A.; Ibañez, P.M.; Castrucci, R.; Reta, R.. |
| This report contains the objectives, data collected and results from a hake assessment survey carried out in the Argentine Sea between 34° and 46° S, during July and August 1994, on board of the R/Vs "Dr. E. L. Holmberg" and "Cap. Oca Balda". The main objectives of the survey were: 1) to estimate total biomass and total abundance per age class; 2) to study the size and age composition; 3) to define the maturity ogive per size and age; 4) to quantitatively determine cannibalism and predation indexes. The area covered by the survey where 149 trawls and 184 oceanographic stations were performed was close to 100,440 nm2 . Hake biomass between 34° and 46° S was estimated in 1,105,284 tons and the confidence interval at 95. was ± 23.12. . Most of the biomass... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Abundance; Biomass; Fishery surveys; Population structure; Stock assessment; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/2591 |
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| Lillo, S.; Céspedes, R.; Díaz, E.; Ojeda, V.. |
| El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47º y 51º Sur. Como parte del proyecto, se realizó entre el 2 y el 15 de agosto del 2003 a bordo del B/C “Abate Molina” un crucero de prospección dirigido a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, estimar la importancia relativa de la fauna acompañante, condiciones reproductivas y tróficas del stock. Durante el estudio se realizaron 13 lances de pesca y 49 transectas acústicas. Los resultados muestran que la merluza de tres aletas se distribuyó asociada al borde de la plataforma y talud continental, con una biomasa estimada... |
| Tipo: Report |
Palavras-chave: Stock assessment; Biomass; Population structure; Age composition; Geographical distribution; Acoustic equipment; Stock assessment; Biomass; Population structure; Age composition; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_5083. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1698 |
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| Leiva, B.; Canales, C.; Barbieri, M.A.; Cortez, J.; Quiroz, J.C.; Arana, P.; Guerrero, A.; Ahumada, M.; Melo, T.; Queirolo, D.; Hurtado, C.; Gálvez, P.; Molina, E.. |
| El Proyecto FIP 2003-31 contempló cruceros de prospección los cuales fueron desarrollados en el período comprendido entre el 17 de agosto y el 27 de septiembre de 2003 y cuyo fin estuvo dirigido a la estimación, mediante evaluación directa, del nivel de biomasa y abundancia del langostino colorado (Pleuroncodes monodon) y langostino amarillo (Cervimunida johni) entre las Regiones II y VIII |
| Tipo: Report |
Palavras-chave: Stock assessment; Crustacean fisheries; Biomass; Abundance; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1733 |
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| Adam, Adel Mohamed Saleh. |
| The present study deals with the fisheries of two Sparid fish species in Abu Qir Bay. Family Sparidae represents about 17 % of the landed catch from the Bay. Among the family; genus Diplodus is generally caught by trammel nets, beach and purse seines but mostly by longlines. Two species of this genus were considered here for study. They are namely D. sargus and D. vulgaris where they represent by about 4.2% of the landed catch during the year 2008 in the Bay (GAFRD, 2008). The length weight relationship of both species under study showed a value of exponent “b” of very slight negative allometry. Analysis of the catch length structure of the two species revealed that the catch of D. sargus is composed of 21 length groups, the least length was 7.5 cm and the... |
| Tipo: Theses and Dissertations |
Palavras-chave: Stock assessment. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5091 |
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| Registros recuperados: 173 | |
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