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Registros recuperados: 113
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Composición, abundancia y distribución del ictioplancton alrededor de las Islas Malvinas, desde 1996 hasta 2003 OceanDocs
Schenone, N. F.; Navarro, C..
Se presenta la composicion, abundancia y distribucion del ictioplancton obtenido en la campana del BIP Dr. Eduardo L. Holmberg EH-04 04 03 realizada en octubre de 2003 Instituto Nacional de Investigacion y Desarrollo Pesquero INIDEP, Argentina). Se efectua una comparacion con datos obtenidos en otras campanas realizadas en la zona alrededor de las Islas Malvinas Argentina, Atlantico SO , en primavera desde 1996 hasta 2003. Se describe la variacion de la extension de las areas de puestas y cria en los distintos anos. Se han identificado huevos de peces en el 42 por ciento de las muestras que pertenecen a Coelorynchus fasciatus, Micromesistius australis, Salilota australis y Sprattus fueguensis y larvas en el 75 porciento de las muestras, pertenecientes a...
Tipo: Theses and Dissertations Palavras-chave: Abundance; Eggs; Fish larvae; Geographical distribution; Ichthyoplankton surveys; Identification keys.
Ano: 2004 URL: http://hdl.handle.net/1834/5783
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Estudio sobre el crecimiento en peso y factor de condición en larvas de anchoíta, Engraulis anchoita Hubbs & Marini. Variaciones regionales, estacionales y anuales OceanDocs
de Ciechomski, J.D.; Sánchez, R.P.; Alespeiti, G.; Regidor, H..
The equation log W=a+bL (where W=dry weight in ug, and L=total length in mm)was used to describe the growth in weight of larval anchovy collected in two areas of the Argentine sea, sampled in different months and several years. Regression lines were compared by covariance analysis applied to two size groups, namely larvae less and over 10 mm total length, as an evident break in the slopes indicated the existence of a chenge of rythm in the trajectory of larval growth in length. Significant differences between the slopes of the growth lines were observed within the smaller size group. No regional or yearly differences could be established fo larvae larger than 10 mm.
Tipo: Journal Contribution Palavras-chave: Length-weight relationships; Fish larvae; Condition factor; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1986 URL: http://hdl.handle.net/1834/2023
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Manuel d’identification des œufs et des larves des espèces les plus abondantes de poissons habitant au large des côtes de l’Afrique du Nord-Est. OceanDocs
Sedletskaya, V.A.
Dans le cadre de leur coopération scientifique et technique, l’AtlantiNIRO et l’IMROP ont convenu de faire des publications conjointes des résultats de leurs travaux communs de recherche et de permettre la publication des travaux de leurs dans les revues des institutions. C’est dans ce cadre que le présent travail, réalisé par un chercheur de l’AtlantNIRO, est publié dans la série « Documents Techniques » de l’IMROP.
Tipo: Report Palavras-chave: Fish larvae.
Ano: 1999 URL: http://hdl.handle.net/1834/227
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Análisis de la distribución y abundancia del ictioplancton y zooplancton acompañante en el Golfo San Matías en noviembre de 1992 OceanDocs
Mercado, L.; Pose, M.; Tesolin, G.; Villar, C..
Realizado en el INIDEP (Instituto Nacional de Investigación y Desarrrollo Pesquero- Mar del Plata, Argentina)
Tipo: Theses and Dissertations Palavras-chave: Ichthyoplankton; Zooplankton; Fish larvae; Abundance; Environmental conditions; Zooplankton; Fish larvae; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1993 URL: http://hdl.handle.net/1834/3550
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Variación temporal de la abundancia de huevos y larvas de Engraulis anchoita en el litoral norpatagónico entre enero y abril de 2001. Crecimiento y mortalidad larval OceanDocs
Brown, D.R.; Leonarduzzi, E.; Averbuj, A.; Livore, J.P..
Argentine anchovy (Engraulis anchoita) eggs and larvae abundance distribution patterns in the Argentine northpatagonian littoral during January-April 2001 were analyzed. As the season progressed, a process of decline in the reproductive activity was observed. Larval growth and mortality rates were established. Age determinations were performed analyzing otoliths daily increments. The 0.43 mm day-1 growth rate average did not show space-time differences, fact attributed to the homogeneity of the thermal field. The 0.32 d-1 January natural mortality rate was determined by exponential decline. Mortality rates, estimated with the mortality-aggregation model, were considered dependent on the larval size. The value ranges (d-1) were 0.07-0.49, 0.05-0.61 and...
Tipo: Journal Contribution Palavras-chave: Fish larvae; Growth; Otoliths; Mortality.
Ano: 2013 URL: http://hdl.handle.net/1834/5500
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Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico. OceanDocs
Bellizia, L.L.; Pan, J.; Venerus, L.A..
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2000 URL: http://hdl.handle.net/1834/1477
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Detección de un área de cría de la merluza de cola (Macruronus magellanicus)en el Mar Argentino. OceanDocs
Machinandiarena, L.; Ehrlich, M.D..
This is the first report of a longtail hake (Macruronus magellanicus)nursery ground. The results of more than ten research cruises conducted since 1990 in the southern patagonian shelf are presented in this study. The nursery ground (52°S to 55°30'S)was detected by the presence of larvae between 5.60 to 12.80 mm of standard length in November and December in that area, with depth ranging from 90 to 160 m.
Tipo: Journal Contribution Palavras-chave: Fish larvae; Nursery grounds; Ichthyoplankton surveys; Fish larvae; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 1999 URL: http://hdl.handle.net/1834/1877
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Morphological development of the mouth and improvement in feeding ability in the early larval stages of red porgy, Pagrus pagrus (L.) OceanDocs
Aristizabal, E.O..
The appearance, ossification and growth of cartilaginous structures of the mouth in early larval stages of laboratory reared red porgy Pagrus pagrus, were examined. At the time of mouth opening, red porgy larvae are equipped with the fundamental components of the oral cavity to allow the sucking motion for acquiring food. During the initial feeding stage, from day 5 after hatching (AH) to day 7 AH, the hyoid and lower branchial archs were completed, and the head length and other structural elements, like the ceratohyal-epihyal cartilage, increased rapidly. These events intensified sucking mechanisms by increasing the amount of ingested rotifers. After day 13 AH, the presence of the bony premaxilla and angular, the ossification of the Meckels cartilage and...
Tipo: Journal Contribution Palavras-chave: Marine aquaculture; Fish culture; Fish larvae; Osteology; Fish culture; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005 URL: http://hdl.handle.net/1834/1560
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Growth in the 0-group of Argentine hake (Merluccius hubbsi) from the Argentine-Uruguayan Common Fishing Zone OceanDocs
Santos, B.A.; Renzi, M.A..
Growth of hake (Merluccius hubbsi) in the 0-group from the Argentine-Uruguayan Common Fishing Zone was studied and spawning data were back-calculated by identifying daily growth rings in otoliths of specimens caught during research cruises performed in May 1997, May 1998 and June 1999. Total length (TL) range was 14-69 mm. Increments were read under microscope using an otolith daily ring measurement system (RATOC). Changes in the increment width data present a pattern that seemed to be similar, and independent from birth date of individuals. Data observed and back-calculated showed good accordance with the Laird-Gompertz model. Significant differences between coefficients were found in all comparisons of growth curves for observed and retrocalculated data....
Tipo: Journal Contribution Palavras-chave: Growth curves; Fish larvae; Juveniles; Otolith reading; Fish larvae; Juveniles; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2006 URL: http://hdl.handle.net/1834/2515
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Estrategia reproductiva de la saraca, Brazilian menhaden, Brevoortia aurea (Pisces: Clupeidae), en el estuario del Río de la Plata OceanDocs
Acha, E.M..
The Brazilian menhaden, Brevoortia aurea, is the only species of genus Brevoortia in South American Atlantic waters, being abundant in the Rio de la Plata estuary. The temporal and spatial reproductive pattern of this menhaden was analyzed in relation to the major hydrographic features of the region, and the reproductive biology was studied by using histological analysis of ovaries. B.aurea is a multiple spawner with indeterminate annual fecundity. Daily spawning activity was mostly in the afternoon (15:00 - 16:00),based on the incidence of females with both hydrated oocytes and postovulatory follicles. Spawning frequency, determined using the percentage of females with postovulatory follicles, was about 12. during November. At this frequency, each...
Tipo: Theses and Dissertations Palavras-chave: Reproduction; Fecundity; Ovaries; Fish larvae; Eggs; Life history; Brackishwater fish; Spawning grounds; Spawning seasons; Estuaries; Estuaries; Ovaries; Eggs; Life history; Spawning grounds; Reproduction; Fecundity; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999 URL: http://hdl.handle.net/1834/1458
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Composición y distribución de huevos y larvas de peces frente a la costa ecuatoriana. Septiembre 2007 OceanDocs
Elías, E; Calderón, G.; Luzuriaga, G.; Chavarría, J..
Entre el 04 y 13 de septiembre de 2007, se realizó el crucero T07-09-04HL, para determinar la composición de huevos y larvas de peces en la zona marine costera de la costa ecuatoriana. El área de estudio se subdividió en cuatro subáreas, dentro de las cuales se ubicaron 157 estaciones donde se realizaron arrastres verticales utilizando una red CalVET. Se registro un total de 15 940 huevos de peces.m-2, correspondientes a 11 órdenes, 19 familias, 18 géneros, 18 especies y además huevos en su primer estadio embrionario. También se identificaron 23 140 larvas.m-2, que correspondieron a 12 órdenes, 32 familias, 45 géneros, 45 especies, y organismos en estado de prelarva. La distribución de las áreas de abundancia de huevos y larvas de peces determine zonas de...
Tipo: Journal Contribution Palavras-chave: Fish eggs; Fish larvae; Species composition; Spatial distribution; Ichthyoplankton.
Ano: 2010 URL: http://hdl.handle.net/1834/4835
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Abundancia y distribución del ictioplancton, fito y zooplancton en el mar ecuatoriano en abril de 1995 OceanDocs
Luzuriaga de Cruz, M.; Elías, E.; Flores, M.E..
El presente trabajo trata de la distribución de la abundancia de huevos y larvas de peces en relación con la abundancia del zooplancton y fitoplancton colectado en 13 estaciones muestreadas a bordo del B/I TOHALLI durante el crucero pelágico-oceanográfico realizado en abril de 1995. Se analizó un total de 12820 huevos de peces. (10m²)¹ y 5145 larvas de peces (10m²)¹. La mayor abundancia de huevos y larvas de peces se localizó al este de las Islas Galápagos, en las estaciones 1P y 10, situadas en los extremos norte y sur del área de muestreo a la altura de la Isla San Cristóbal, con 5226 huevos (10m²)¹ y 1042 larvas (10m²)¹, respectivamente, mientras que la menor abundancia se localizó también al este de la Islas Galápagos, en las estaciones 7 y 5 con 109...
Tipo: Journal Contribution Palavras-chave: Abundance; Ichthyoplankton; Phytoplankton; Zooplankton; Cruises; Fish eggs; Fish larvae; Phytoplankton; Zooplankton; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1998 URL: http://hdl.handle.net/1834/2278
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Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005. Informe Final corregido. 2da. Versión OceanDocs
Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J.; Letelier, J..
En el presente informe se entregan los resultados de las condiciones oceanográficas fisico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report Palavras-chave: Echo surveys; Geographical distribution; Abundance; Seasonal variations; Fish eggs; Fish larvae; Physical oceanography; Chemical oceanography; Geographical distribution; Physical oceanography; Fish larvae; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 2007 URL: http://hdl.handle.net/1834/1850
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Diagnóstico del plancton en el estuario de San Lorenzo en agosto 2006 (Esmeraldas-Ecuador) OceanDocs
Torres, G.; Andrade, C..
Se realizó un monitoreo del plancton en el estuario de San Lorenzo en junio 2006. En los resultados se registró 128 especies del fitoplancton (método cuantitativo) y 50 especies (cualitativo). Las diatomeas más representativas fueron S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., P. sulcata: T. nitzschioides. Thalassiosira sp. y flagelados (cuantitativo); S. costatum, Coscinodiscus sp., N. sigma y P. Sulcata (cualitativo). La presencia de Gymnodinium sp. P. maximun y M. rubrum podría asociarse con la formación de mareas rojas al interior del estuario. En los resultados del zooplancton registrarón 16 taxas constituidos mayoritariamente por Zoeas de Brachiura y Copépodos, distribudidos en toda el área de estudio principalmente en...
Tipo: Journal Contribution Palavras-chave: Plankton; Diatoms; Phytoplankton; Zooplankton; Biomass; Fish larvae; Eggs; Abundance; Estuaries; Species diversity; Zooplankton; Biomass; Eggs; Estuaries; Plankton; Phytoplankton; Fish larvae; Species diversity; Diatoms; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2007 URL: http://hdl.handle.net/1834/2378
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Estudio de huevos y larvas de peces en el mar ecuatoriano durante septiembre-diciembre de 1990 OceanDocs
Villamar, F.; Ortega, D..
Durante los cruceros oceanográficos realizados en septiembre, noviembre y diciembre de 1990, las especies de peces de interés comercial encontrados fueron: Sardinops sagax, Etrumeus teres, Opisthonema s.p, Scomber japonicus y Engraulis ringens; en concentraciones no mayores a 100 ejemplares/10 m2, localizados en la zona Sur del perfil costanero ecuatoriano. Entre otros huevos (H) y larvas (L) de peces, se encontraron los pertenecientes al género Leuroglossum, de la familia Bathylagidae y también ejemplares pertenecientes a la familia Myctophydae. En general, la cantidad máxima total de huevos de peces fue mayor de 10000 H/10 m2 en la longitud 82°00'W, tanto a la altura de Cabo Pasado como al sur de la Punta de Santa Elena. La cantidad máxima de larvas de...
Tipo: Journal Contribution Palavras-chave: Larval development; Fish larvae; Commercial species; Fish eggs; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1991 URL: http://hdl.handle.net/1834/3140
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Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico. OceanDocs
Bellizia, L.L.; Pan, J.; Venerus, L.A..
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae.
Ano: 2000 URL: http://hdl.handle.net/1834/1477
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Consumo de oxígeno, crecimiento y utilización del alimento durante el desarrollo larval del besugo Pagrus pagrus (Linné, 1758)(Pisces:Sparidae). OceanDocs
Aristizabal, E.O..
Knowledge of the life history of fish larvae is of practical importance to understand variations in the survival rate not only for cultivated fish but also for fishery biology studies. With the aim of recognizing critical changes during the first days of life of red porgy larvae, the oxygen consumption, growth, and food utilization were studied. After hatching, the larvae were transferred to two 400 L fiberglass tanks with microalgae (Nannochloropsis oculata)and enriched rotifers (Brachionus plicatilis)as initial food. During the incubation and larval rearing, water temperature was kept at 18.0 ± 0.5ºC and salinity ranged from 33.0 to 34.0 psu. Results indicate a decrease in larval growth between day 3 and 4 after hatching, when larvae opened their mouths,...
Tipo: Journal Contribution Palavras-chave: Fish culture; Marine fish; Fish larvae; Metabolism; Oxygen consumption; Fish culture; Metabolism; Fish larvae; Oxygen consumption; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_4769; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5478.
Ano: 2006 URL: http://hdl.handle.net/1834/1557
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Oceanographic and faunistic structures across an Angola Current intrusion into northern Namibia waters. OceanDocs
John, H.C.H.; Mohrholz, V.; Lutjeharms, J.R.E..
It is thought that the penetration of Angolan waters through the Angola–Benguela Frontal Zone (ABFZ) into the much cooler Benguela regime may come about by a poleward slope undercurrent as well as by cross-frontal filaments. To test this hypothesis, two zonal transects off the northern Namibian coast were surveyed by CTD casts, current measurements and ichthyoplankton samples during April 1999. Simultaneous sea-surface temperature (SST), chlorophyll-a concentration, and wind data were obtained from satellite. The multidisciplinary results are described.An intense intrusion of the Angola Current into northern Namibian waters occurred with distinct signals of high temperatures and salinities, low chlorophyll-a concentration, and Angolan fish larvae of both...
Tipo: Journal Contribution Palavras-chave: Oceanographic data; Fauna; Frontal features; Chlorophylls; Temperature; Mesoscale features; Larvae; Surveys; Fish larvae; Hydrography.
Ano: 2004 URL: http://hdl.handle.net/1834/4937
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Patrones de utilización de la laguna Mar Chiquita (Buenos Aires, Argentina) y área costera adyacente por parte de los primeros estadios ontogénicos de peces OceanDocs
Bruno, Daniel O..
The role of the Mar Chiquita lagoon and its adjacent coastal area as nursery ground for fish larvae and juveniles and the factors which regulate their recruitment process, was evaluated. To do so, we analyzed the fish early life stages composition and spatio-temporal variation over the marine-estuarine gradient of the lagoon and its relationship with environmental factors; the diel variation of these stages in the immediate area at the mouth of the lagoon; and the source of the organic carbon which feed them on the mouth of the lagoon and adjacent coastal area, by using stable isotope analysis. The richness and mean density of larvae were higher at the offshore area than at the lagoon. Inside the lagoon the dominant species in larval stage was Brevoortia...
Tipo: Theses and Dissertations Palavras-chave: Brackishwater fish; Fish larvae; Juveniles; Recruitment; Life cycle; Environmental factors; Abundance; Brackishwater environment; Coastal lagoons; Brevoortia aurea; Gobiosoma parri; Platanichthys platana; Ramnogaster arcuata; Odontesthes argentinensis; Engraulidae; Brackishwater environment.
Ano: 2014 URL: http://hdl.handle.net/1834/5819
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A drift study of vertical distribution and mortality of Engraulis anchoita eggs and larvae. OceanDocs
Sánchez, R.P.; de Ciechomski, J.D.; Lasta, C.A.; Guerrero, R.A..
Lagrangian changes in distribution and survival within an anchovy egg and larvae patch were studied by means of multiple opening/closing sampling following a free drifting buoy. The buoy was equipped with a radar reflector and flashing light, and it was connected to a current cross drogue floating at 15 m depth, which corresponded to the main egg and larvae concentration within the patch. The drifter was launched on the Buenos Aires continental shelf, off Necochea during the spring spawning peak of 1983. Three discrete depths (within, below and above the thermocline)were repeatedly sampled close to the drogue with a Motoda sampler. Egg and larval abundances in the vicinity of the drogue were monitored at 3/4 hour intervals for a period of three days. Each...
Tipo: Journal Contribution Palavras-chave: Fish larvae; Fish eggs; Vertical migrations; Feeding; Environmental effects; Ichthyoplankton surveys; Vertical distribution; Survival; Abundance; Drifting data buoys; Fishery surveys; Feeding; Fish larvae; Survival; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1999 URL: http://hdl.handle.net/1834/1871
Registros recuperados: 113
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