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| Registros recuperados: 173 | |
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| Vicuña, H.; Chalén, X.. |
| The document presents results from the pelagic acoustic research survey, executed at the East zone of the Galápagos Islands, between April and May 1995. A total of ca., 15 500 km² was covered. The following species were identified in the catch: mackarel (Scomber japonicus), south sardine (Sardinops sagax), mictophids (Lampanyctus spp.), and small specimens of giant squid (Dosidicus gigas). Mean legth and weight for mackarel and south sardine were 26,3 cm FL/0,251 kg and 18,6 cm TL/0,051 kg respectively. The estimated density for small pelagic fish of comercial interest (mackarel and sardine) was of 10,5 km². The estimated biomass for mackarel was ca., 125 000 t whereas for sardine was ca., 36 000 t. The current results coincide with those of March-April... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Length-weight relationships; Biomass; Stock assessment; Echo surveys; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/3022 |
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| Córdova, J.; Correa, V.; Hernández, C.; Letelier, J.; Reyes, H.; Ramirez, N.; Catasti, V.; Valenzuela, V.; Bocic, V.. |
| El presente informe contiene los resultados de la cuantificación de la biomasa por hidroacústica del jurel en la zona norte, la distribución e indicadores biológicos del jurel, las condiciones ambientales y las relaciones entre éstas y la distribución del recurso. El crucero de investigación se realizó entre el 2 de noviembre y el 5 de diciembre del año 2006. La prospección abarcó el área desde Arica (18º 20’ S) a Antofagasta (23º 50’ S), desde las 5 a 200 mn. Este estudio se llevó a cabo con el B/C Abate Molina operado por el Instituto de Fomento Pesquero (IFOP) y de propiedad de Subsecretaría de Pesca. |
| Tipo: Report |
Palavras-chave: Stock assessment; Biomass; Echo surveys; Environmental conditions; Geographical distribution; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1851 |
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| Lillo, S.; Céspedes, R.; Ojeda, V.; Saavedra, A.; Díaz, E.; Adasme, L.. |
| El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47° 00' S y 51° 00' S. Como parte del proyecto, se realizó entre el 2 y el 14 de septiembre de 2004 un crucero de prospección a bordo del B/C Abate Molina, orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, junto con estimar la composición de tallas, edad y proporción sexual del stock desovante en el área de estudio. |
| Tipo: Report |
Palavras-chave: Stock assessment; Spawning populations; Echo surveys; Biomass; Geographical distribution; Sex ratio; Age groups; Body size; Stock assessment; Biomass; Geographical distribution; Body size; Sex ratio; Age groups; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_35330; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_28628. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1740 |
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| Hansen, J.E.; Madirolas, A.. |
| Two pelagic surveys to study were carried out during 1993. Those surveys covered the regions inhabited by either the bonaerensis stock in october (34-41°S)and the patagonian stock in November - December (41-45°30'S). Pre-stratified random sampling designs, including two random steps to allocate the transects, were adopted to perform the acoustic sampling by echo integration. A midwater trawl net (9-16 m vertical opening, 10 mm mesh-sized codend)was used to collect fish samples. The biomass of the northern stock was acoustically estimated to be about 1,45 million tons, whereas that of the southern stock was almost 740,000 t. Young anchovies, up to two-year old, allow for most of theose abundance values within each stock. The arrays of individuals at the sea... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Geographical distribution; Biomass; Mortality; Echo surveys; Stock assessment; Geographical distribution; Biomass; Stock assessment; Pelagic fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_4945. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/1955 |
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| Córdova, J.; Barbieri, M.A.; Espejo, M.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Catasti, V.; Valenzuela, V.. |
| El presente informe contiene los resultados de la cuantificación de biomasa por hidroacústica del jurel (Trachurus murphyi) en la zona centro-sur, la distribución e indicadores biológicos del jurel, las condiciones ambientales, y las relaciones entre éstas y la distribución del recurso. El crucero de investigación se realizó entre el 29 de mayo al 23 de junio del año 2003. |
| Tipo: Report |
Palavras-chave: Stock assessment; Biomass; Echo surveys; Geographical distribution; Environmental conditions; Fishery resources; Pelagic fisheries; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Fishery resources; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_5659. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1734 |
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| Hansen, J.E.; Garciarena, A.D.. |
| As part of the research programs performed yearly at the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Mar del Plata, Argentina) some important basic data about the commercial fisheries usually included in internal reports are registered. This formal paper is a review and summary of size and age composition estimates of commercial catches (discards included) of Northern Argentine anchovy (34ºS-41ºS) obtained between 1990-2011. The basic data resulting from the examination of 521 samples from fishing vessels included 62,466 fish length measurements and 26,667 valid age readings from which the corresponding 22 annual age-length keys were built. The annual estimates of the individual total length-total weight relation parameters and of... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Stock assessment; Commercial fishing; Catch composition; Age composition; Size distribution; Clupeoid fisheries. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5502 |
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| Young, Z.; Díaz, E.; Bahamonde, R.; Tascheri, R.; Muñoz, Y.; Olivares, A.; Ortego, M.I.; Rivera, J.; Oliva, J.. |
| Se realizó una recopilación y análisis de datos de la pesquería de orange roughy (Hoplostethus atlanticus) que cubrió el período mayo-agosto de 2001, con el propósito de caracterizar la actividad pesquera y la condición biológica del recurso. Además, se realizó una pesca exploratoria, orientada a prospectar nuevas áreas de extracción para este recurso. |
| Tipo: Report |
Palavras-chave: Marine fisheries; Deep-sea fisheries; Stock assessment; Fecundity; Reproduction; Echo surveys; Marine fisheries; Stock assessment; Fecundity; Reproduction; Http://aims.fao.org/aos/agrovoc/c_4611; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_6507. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1727 |
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| Sánchez, R.P.; de Ciechomski, J.D.. |
| A bongo sampler fifted with nets of two different mesh sizes, 330 and 505 u. was used to collected 137 ichthyoplankton samples in the coastal areas off Buenos Aires Province in October, 1981. The efficiency of the two meshes for catching anchovy eggs and larvae and total ichthyoplankton was examined. The statistical analysis of the samples shows that there are no significant differences between the numbers of anchovy and total eggs collected by the different meshes. As regards anchovy and total larvae the finer mesh showed as significantly higher catching efficiency. The results of this partial estimate do not suggest that a major revision of the total assessment of the complete stock is necessary. |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Fish eggs; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_24251. |
| Ano: 1984 |
URL: http://hdl.handle.net/1834/2044 |
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| Campbell, R.A.; Tuck, G.N.. |
| Due to the general lack of targeted fisheries on billfish, the resource status of these species within the Indian Ocean has not been analysed in any previous study and currently remains unknown. Nevertheless, significant quantities of billfish are caught annually in the Indian Ocean and, being generally long lived, these species remain vulnerable to overfishing. In this paper preliminary indices of stock availability are presented for the main billfish species based on the catch and effort data pertaining to the Japanese and Taiwanese Indian Ocean longline fisheries. While the indices need to be treated with some caution (due to problems relating to the accuracy of the catch and effort data, and the fact that changes in catchability have not been factored... |
| Tipo: Proceedings Paper |
Palavras-chave: Catch/effort; Stock assessment; Overfishing; Catchability; Fishing gear. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/58 |
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| Wöhler, O.C.; Hansen, J.E.; Giussi, A.R.; Cordo, H.D.. |
| Period 1985-2001. A stock assessment of Patagonian hoki of the Southwest Atlantic was carried out by using data from the years 1985-2001. A cohort analysis, fitted with some survey abundance indices was used in an adaptive conceptual framework. Simulation trials were performed to project the evolution of the fishery, to evaluate the risk of over-fish the stock under different exploitation levels, and to estimate Biologically Acceptable Catches (BAC). Both total biomass and spawning stock biomass showed increasing trends resulting from four strong year classes (1993, 1995, 1996 and 1998). Total biomass at the beginning of 2001 was estimated to be 2.5 million tons, and spawning stock biomass at the spawning time (August) was estimated to be around 1.28... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Fishery management; Biomass; Risks; Demersal fisheries; Stock assessment; Fishery management; Biomass; Demersal fisheries; 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_2173. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2525 |
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| Lillo, S.; Barbieri, M.A.; Espejo, M.; Castillo, J.; Miranda, H.; Córdova, J.; Saavedra, A.; Rojas, M.; Cancino, C.; Flores, F.; Reyes, H.. |
| En el presente informe se entregan los resultados finales del proyecto FIP 2003-34, cuyo objetivo general fue estimar mediante métodos in situ, la fuerza de blanco de las especies merluza del sur y merluza de cola (Merluccius australis y Macruronus magellanicus). En primer lugar durante el desarrollo del proyecto, se debió proponer un enfoque metodológico dirigido a efectuar las mediciones de fuerza de blanco considerando las características del recurso y los medios tecnológicos disponibles. En segundo término, se procedió a definir un sistema acústico a emplear para lo cual se analizaron diferentes alternativas, seleccionándose un sistema compuesto de un transductor de profundidad que era desplegado en las profundidades de distribución de los recursos... |
| Tipo: Report |
Palavras-chave: Stock assessment; Acoustic equipment; Echo surveys; Target strength; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_24251. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1812 |
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| Braun, M.; Claramunt, G.; Reyes, H.; Catasti, V.; Montenegro, C.; Baros, V.; Díaz, E.; Pizarro, J.; Pizarro, P.. |
| El informe contiene los resultados correspondientes al desarrollo del crucero Módulo huevos y Módulo adultos del Proyecto FIP 2003-07. De conformidad con la metodología planteada en la propuesta técnica y con el fin de estimar los parámetros biológicos que requiere la aplicación del Método de Producción de Huevos, a saber: fecundidad media poblacional, frecuencia de desove, proporción sexual, producción diaria de huevos y peso estimado de hembras maduras, se realizaron los respectivos muestreos para el recurso anchoveta, durante el período de máxima actividad reproductiva del año 2003. |
| Tipo: Report |
Palavras-chave: Stock assessment; Reproduction; Eggs; Fecundity; Pelagic fisheries; Spawning; Eggs; Stock assessment; Spawning; Reproduction; Fecundity; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_5659. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1732 |
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| Registros recuperados: 173 | |
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