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| Registros recuperados: 173 | |
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| de Moussac, G.. |
| Le present rapport resume et synthetise les donnees des principales publications concernant la biologie des peches artisanales aux Seychelles, depuis 1912, en particulier les rapports des prospections et de statistiques de peche. Une premiere partie presente les donnes biologiques acquises aux Seychelles {sensu strioto) sur quelques 58 especes de poissons. Certains resultats non publies (principalement proposes par l'auteur) sont egalement inclus dans ce chapitre. La seconde partie traite des donnes biologiques sur les ressources marines vivantes, autre que les poissons, a savoir les crustaces, les coquillages et les algues. Le troisieme chapitre resume les resultats concernant les quantifications des... |
| Tipo: Report |
Palavras-chave: Finfish fisheries; Fishery statistics; Population dynamics; Biological data; Stock assessment; Shellfish fisheries; Oyster fisheries. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/5126 |
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| Saavedra, A.; Gálvez, P.; Barria, P.; Espejo, M.; Barbieri, M.A.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Molina, E.; Cerna, F.; López, A.A.; Bustos, L.. |
| Se presentan los resultados de la evaluación acústica de la biomasa, abundancia y distribución espacial; oferta ambiental de alimento, y las condiciones oceanográficas físicas asociadas a la anchoveta (Engraulis ringens) y sardina común (Strangomera bentincki) en el período de reclutamiento de enero del año 2004 entre Topocalma (33º 50' S) y Punta Galera (40º 00' S). |
| Tipo: Report |
Palavras-chave: Biomass; Abundance; Geographical distribution; Environmental conditions; Stock assessment; Echo surveys; Biomass; Geographical distribution; Stock assessment; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_32980. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1738 |
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| Inacio, A.; Barros, P.C.. |
| Foi feita uma avaliação da pescaria e do manancial de Hilsa kelee (magumba) na Baía de Maputo em Janeiro de 2011. Para a avaliação, foram aplicados dois tipos de modelos, um modelo dinâmico de produção geral baseado no modelo logístico de Schaefer, usando os dados de captura e índices de abundância, modelos baseados na composição por comprimentos e um modelo de podução por recruta por comprimentos com uma série de dados do período de 1992-2010. Os níveis de esforço de pesca mais elevados foram registados no ano de 2007 e o menor em 2009. As capturas totais estimadas para o período de 2006 a 2010 apresentam níveis abaixo das 3.000 t. O valor estimado mais baixo, cerca de 1.100 t, foi para o ano de 2009. A CPUE mostra um nível baixo em 2007 (119 kg por dia... |
| Tipo: Journal Contribution |
Palavras-chave: Fish stocks; Stock assessment. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5141 |
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| Hansen, J.E.; Buratti, C.C.; Garciarena, A.D.. |
| Advise on Biologically Allowable Catch (BAC) for Southern Argentine anchovy (Engraulis anchoita, 41° S-48° S) during 2012. To assess the evolution since 1990 and the current status of Argentine anchovy Southern stock, an Age Structured Population Model (ASPM) was used. Modeling of catches according to a four-month period pulses allowed to predict annual yields so as to get them close to the nominal catches officially recorded. Some independent indexes of stock abundance (eight acoustic estimates of total biomass and five estimates of spawning stock biomass obtained with the Daily Egg Production Method) and the proportion of individuals per age group assessed during the same cruises were used to calibrate the fitting. No stock-recruitment function but a... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Yield; Statistical models; Age composition; Clupeoid fisheries. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5508 |
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| Hernández, D.R.; Perrotta, R.G.. |
| Pope's Cohorts Analysis was modified to extend its application to a wider range of natural mortality, M and fishing mortality, F rate values. The modified method maintains the simplicity of the one established by Pope and does not require to resolve any non lineal equation in each cohort reconstruction process. The relative errors obtained when estimating the number of individuals per age (maximum and mean in absolute value) showed acceptable levels within the five domains (M and F pairs of values) analyzed in this work. The new method can be adapted to a particular situation (M and F values range) simply solving an optimization problem (minimization of the maximum relative error absolute value) easily achieved using a calculation sheet or considering the... |
| Tipo: Journal Contribution |
Palavras-chave: Fishing mortality; Natural mortality; Stock assessment; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_24251. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3143 |
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| Lillo, S.; Bahamonde, R.; Olivares, J.; Saavedra, J.; Molina, E.; Díaz, E.; Braun, M.; Núñez, S.; Navarro, E.; Vásquez, S.; Sepúlveda, A.. |
| Este documento contiene el informe final del proyecto FIP 2006-03, realizado por el Instituto de Fomento Pesquero como unidad ejecutora y el Instituto de Investigación Pesquera de la Octava Región S.A. como subcontratada. El objetivo general del proyecto fue evaluar el stock de la merluza común (Merluccius gayi gayi) y estimar las características biológicas, pesqueras y oceanográficas relevantes del recurso. Metodológicamente, se realizaron dos cruceros de prospección, uno entre el 6 de abril y el 17 de mayo y el otro desde el 10 de julio al 19 de agosto del 2006, ambos cubrieron una zona de aprox. 13.000 millas náuticas cuadradas que correspondieron al área de la plataforma continental entre las latitudes 29º 10’ S y los 42º 00’ S y desde la costa hasta... |
| Tipo: Report |
Palavras-chave: Stock assessment; Echo surveys; Oceanographic surveys; Biological data; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_24251. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1853 |
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| Ben Abdallah, O.; Ben Hadj Hamida, N.; Jarboui, O.. |
| The experimental survey done, in august 2005, in coastal marine zone (0 - 20 m) of Zarzis showed the existence of numerous species of shellfishes of which Tricolia speciosa, Smaragdia viridis, Nassarius incrassatus, Cerithium vulgatum and Gibbulla umbilicaris are the most important gasteropods and, Pinctada radiate and Donax trunculus the main bivalves. The biomasses estimation, based on the method of swept area, in the studied zone showed that P. radiate is the most abundant species with about 20 000 tones, followed by C. vulgatum (7 645 tones) and T. speciosa (more than 1 000 tones). The Donax trunculus biomass is very low with only 13 tones. Finally, the abundance indexes distribution cartography permitted us to note that it varies from one species to... |
| Tipo: Journal Contribution |
Palavras-chave: Biomass; Cartography; Geographical distribution; Marine crustaceans; Shellfish; Stock assessment; Biomass; Geographical distribution; Shellfish; Stock assessment; Cartography; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_1344. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/4272 |
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| Gasceul, D.; Laurans, M.; Sidibe, A.; Barry, M.D.. |
| This communication presents a synthesis of the work undertaken within the framework of the FIAS project, by the “Single-species Analysis” module. This work focuses on statistical analyses of commercial fishing and the data from scientific trawling surveys, in order to deduce the current state of exploited stocks and to better understand the ecosystems of the sub-region. This relates to the analyses of about 20 stocks, distributed in the waters of the various countries and covering a broad range of ecological characteristics. Three approaches were used: (1) analyses of a time series of estimates of abundance indices obtained from GLM-type methods applied to survey or commercial data; analysis of a time series of catches and catches per unit of effort used... |
| Tipo: Conference Material |
Palavras-chave: Demersal fisheries; Stock assessment. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/689 |
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| Lillo, S.; Olivares, J.; Braun, M.; Díaz, E.; Núñez, S.; Saavedra, A.; Saavedra, J.; Tascheri, R.. |
| El presente informe contiene los resultados del proyecto FIP 2004-09, el que tuvo como objetivo central cuantificar el stock (estimar la distribución y abundancia) y determinar las características biológica, pesquera y oceanográfica relevantes del recurso. Metodológicamente, en primer lugar se realizó un crucero de prospección en el B/C Abate Molina, con el fin de recabar los datos acústicos, pesqueros y oceanográficos; en segundo lugar, el análisis de los datos para proceder con la evaluación del recurso. El crucero de prospección acústica que se llevó a cabo desde el 2 de julio al 12 de agosto de 2004 dentro del área de la pesquería, efectuándose 139 lances de pesca, 80 transectas acústicas y 92 estaciones oceanográficas. |
| Tipo: Report |
Palavras-chave: Stock assessment; Geographical distribution; Abundance; Echo surveys; Stock assessment; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5083. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1843 |
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| Ruarte, C.O; Rico, M.R.. |
| Stripped weakfish is one of the ensemble of species known as “variado costero” most frequently landed. Considering that fact, determination of abundance indices is particularly relevant to apply assessment models and make recommendations to allow for a proper fishery management. The aim of this study was to obtain those indices of the species derived from research cruises carried out in the Argentine-Uruguayan Common Fishing Zone AUCFZ area (34°S-39°S) in the 1993-2006 period. In order to improve the traditional estimate accuracy modeling was used. To formulate the general linear models year, stratum, length, bottom salinity, depth factors and population data such as mean size and juveniles percentage were used. The percentages of variance explained in the... |
| Tipo: Journal Contribution |
Palavras-chave: Abundance; Mathematical models; Stock assessment; Coastal fisheries; Cynoscion guatucupa; Marine environment. |
| Ano: 2014 |
URL: http://hdl.handle.net/1834/5821 |
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| Abban, E.K.; Asante, A.K.; Falk, T.M.. |
| Ghana is one of the countries bordering theAtlantic Ocean on the coast of Africa. The country is located between latitudes 5" N and11" N and longitudes 1" E and 3" W Thecoastline of Ghana, approximately 550 kmlong, is dotted with about 50 lagoons andestuaries that, together with rocky capes and avariety of sandy bays, constitute its coastalwetlands (Armah 1993). These lagoons,estuaries and associated floodplains providehabitats for a variety of wildlife including birdsand fishes (Ntiamoa-Baidu 1991). With an estimated 40 000 ha surface area, the lagoonsare important fish and fisheries resources forassociated communities. The fish speciescomposition of these lagoons varies slightly,but a constant and predominant species is theblack-chinned tilapia,... |
| Tipo: Proceedings Paper |
Palavras-chave: Fish species; Stock assessment. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/698 |
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| Registros recuperados: 173 | |
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