GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Variaciones de la abundancia numérica y biomasa del zooplancton de red en el Golfo San Jorge (año 1985) (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: A study was made on numercial and biomass variations of the zooplankton of the San Jorge Gulf (Argentina), based on samples from five cruises performed during 1985. The sampling was included within a proagramme for the biology and fishery evaluation of the shrimp Pleoticus muelleri. San Jorge, a large gulf of the northern patagonian shelf, comprises major fishery activities. Some fish species of economical importance depend on copepods for their feeding, like anchovy (Engraulis anchoita)or partially on middle-size plankters, like mackerel (Scomber japonicus). As a way for determining the trophic disponibility at the gulf, a study was made in order to express the numerical abundance of copepods, euphausiids and amphipods and other items of lesser importance, as well as their total biomass.
    Description: Publisher permission
    Description: Published
    Description: zooplancton, distribución por tamaño, densidad poblacional, biomasa
    Keywords: Zooplankton ; Biomass ; Population density ; Zooplankton ; Biomass ; Size distribution ; Population density
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Relaciones peso seco-talla y volumen-talla en Themisto gaudichaudii, principal anfípodo hiperído del Mar Epicontinental Argentino. (2007)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: Themisto gaudichaudii, the most abundant and widely distributed hyperiid amphipod in Argentine shelf waters, provides a source of food for several species of economical value such as the anchovy, mackerel, hake, and squid. Predictive dry weight-length and volume-length regression were established in order to provide an indirect estimation of the individual body mass from a measurement of body length. Samples were collected in San Jorge Gulf and fixed with a 4 o/o formaldehyde solution. The possible effect of formaldehyde fixation on dry weight and volume is discussed.
    Description: Publisher permission
    Description: Published
    Description: Amphipoda, Hyperiidae, Themisto gaudichaudii, relaciones largo-peso, peso seco
    Keywords: Dry weight ; Length-weight relationships
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    La caballa (Scomber japonicus) y las condiciones ambientales en el area bonaerense de El Rincón (39°- 40°30' S), agosto 1996. (2008)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero
    Details
    Publication Date: 2021-05-19
    Description: In August 1996 acoustic methods were employed to estimate mackerel (Scomber japonicus) abundance in the Buenos Aires, Argentina shelf area of "El Rincón" (4,287 mn2), located between 39°- 40° 30' S. Results showed a biomass estimate of 77,260 t. ASIMRAD EK-500 equipment operated with a 38 KHz split-beam transducer was used. Midwater fishing trawls were employed to identify echotraces and to collect mackerel samples.Trawls 4 and 5 were the most successful. Samples included only adult fish (310-470 mm Lt and ages ranging 2-11). Length and weight growth parameters and mortality rates were estimated. Analysis of the stomach contents revealed that mackerel was feeding exclusively on zooplankters over 2 mmlength. The analysis of the characteristics (dimensions and density) of the mackerel shoals allowed to detect two areas of concentration above and below 40°S latitude. The northern area was characterized by relatively small schools of medium density similar to those of the Mar del Plata area. In the southern zone, large schools of high density that account for almost 92 of the total biomass were found.Differences between both areas were also detected when plankton distribution was analyzed. Higher abundances of the dinoflagellate Alexandrium tamarense corresponded to the southern area. On the contrary, higher zooplankton biomass was detected northerly of 40°S. From an oceanographic standpoint, the presence of mackerel was associated to relatively higher salinity values. As a result of the different data analyzed it is suggested that,during this time of the year, the species shows a migratory pattern from the intermediate shelf to coastal areas.
    Description: Publisher permission
    Description: Published
    Description: Scombridae, Scomber japonicus, caballa, zooplancton, relevamientos ecoicos, condiciones ambientales, biomasa, abundancia, estructura poblacional
    Keywords: Biomass ; Population structure ; Zooplankton ; Environmental conditions ; Abundance ; Biomass ; Population structure ; Zooplankton ; Environmental conditions ; Echo surveys
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Una aplicación de los estudios ambientales para orientar la pesqueria de la caballa Scomber japonicus en Mar del Plata (2008)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero
    Details
    Publication Date: 2021-05-19
    Description: Both mackerel mean biomass and mean fishing effort in Buenos Aires (Argentina) shelf during the period 1990-91/1994-95 were estimated. Those values were 85,792 t and 42,051 minutes, respectively. However, the best economic profit from the fishery (about $15,390,036)($1=U$S1) was estimated to take place at 28,000 minutes. It was observed a waste in fishing effort of the commercial fleet related with sea surface temperatures of 19°C or more. Moreover, adult mackerel find better trophic conditions on the continental shelf (depth 50m), while larvae originated from massive spawning in late November-early December, i.e., during the main fishing season, find their optimum at lower depths. Mackerel shoals enter and leave fishing grounds in a counterclockwise way pushed by waters from the median shelf. A fishing strategy according with sea surface temperature is proposed to lead the commercial fleet.
    Description: Publisher permission
    Description: Published
    Description: Scombridae, Scomber japonicus, caballa
    Keywords: Biomass ; Environmental conditions ; Mackerel fisheries ; Biomass ; Catch/effort ; Environmental conditions ; Economic models ; Commercial fishing
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Misidáceos. (2018)
    Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) | Mar del Plata, Argentina
    Details
    Publication Date: 2021-05-19
    Description: En el presente capítulo se presenta una recopilación de las investigaciones sobre misidáceos realizadas en el Mar Argentino que abarcan aspectos relacionados con los patrones de distribución y abundancia de las especies que lo habitan y el rol que desempeñan en las tramas tróficas pesqueras. Neomysis americana y Arthromysis magellanica, que se destacan por su abundancia e importancia ecológica en sistemas costeros y estuariales del Mar Argentino constituyen un eslabón clave en las tramas tróficas por su condición de nexo entre el fitoplancton, el zooplancton y los detritos, recursos ambientales básicos de los que se alimentan, y los peces costeros que utilizan los estuarios como áreas de alimentación y cría. N. americana es la principal presa de los juveniles de corvina (Micropogonias furnieri) en el estuario del Río de la Plata y de los juveniles de esciénidos en el estuario de Bahía Blanca. A A. magellanica se la considera la presa esencial de la sardina fueguina (Sprattus fuegensis) y de distintos peces costeros y estuarinos de interés comercial.
    Description: In this chapter, a compilation of the research on mysids carried out in the Argentine Sea that comprises aspects related to the distribution and abundance patterns of the inhabitant species and the role they play in the fishery food webs is presented. Neomysis americana and Arthromysis magellanica, that stand out for their abundance and ecological importance in coastal and estuarine systems of the Argentine Sea constitute a key link in food webs for being the nexus between the phytoplankton, zooplankton and detritus, basic environmental resources of whom they feed, and coastal fishes that make use of estuaries as feeding and nursery grounds. N. americana is the main prey of whitemouth croaker (Micropogonias furnieri) juveniles in the Río de la Plata estuary and of sciaenid juveniles in the Bahía Blanca estuary. A. magellanica is considered the main prey of fueguian sprat (Sprattus fuegensis) and of different coastal and estuarine fishes of commercial interest.
    Description: Contribución INIDEP 1966
    Description: Published
    Keywords: Morfología animal ; Taxonomía ; Distribución ; Distribución geográfica ; Distribución vertical ; Alimentación ; Trama alimenticia ; Ciclo de vida ; Neomysis americana ; Arthromysis magellanica ; ASFA_2015::A::Animal morphology ; ASFA_2015::T::Taxonomy ; ASFA_2015::D::Distribution ; ASFA_2015::G::Geographical distribution ; ASFA_2015::V::Vertical distribution ; ASFA_2015::F::Feeding ; ASFA_2015::F::Food webs ; ASFA_2015::L::Life cycle
    Repository Name: AquaDocs
    Type: Book Section , Refereed
    Format: pp.41-49
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    Aspectos poblacionales de Themisto gaudichaudii, una especie clave en la trama trófica de la plataforma patagónica austral (2016)
    Details
    Publication Date: 2021-05-19
    Description: With the aim of studying population aspects of Themisto gaudichaudii, samples from 12 research cruises carried out in different seasons were analyzed. Abundances and biomass were among the highest recorded for the species throughout its distribution range. These parameters showed a strong seasonal variation with the highest values recorded during spring-summer (maximum at the end of the period: 16.6 ind. m-3 and 20 mg m-3), and minimum values in winter (0.9 ind. m-3 and 1.7 mg m-3). The highest concentrations were located between 50° S and 52° S in the Bahía Grande. These biomasses would be developed by adaptations to local environmental conditions, particularly to high food availability and temperature. The population of T. gaudichaudii analyzed presents a more extended reproductive period (spring-summer), a larger number of cohorts (two main cohorts) and a smaller size at maturity (~ 10 mm) than other populations at similar latitudes. These adaptations would favor a larger population of T. gaudichaudii placing the ecosystem of the southern Patagonian shelf among the most favorable for the development of the species throughout its global distribution range.
    Description: Con el objeto de estudiar aspectos poblacionales de Themisto gaudichaudii en la plataforma patagónica austral, se analizó material de 12 campañas de investigación realizadas en las distintas estaciones del año. Las abundancias y biomasas obtenidas estuvieron entre las más altas registradas para la especie en toda su área de distribución. Ambas mostraron una fuerte variación estacional con elevados valores en primavera-verano y un máximo al final del período (16,6 ind. m-3 y 20 mg m-3), y mínimos valores en invierno (0,9 ind. m-3 y 1,7 mg m-3). Las mayores concentraciones se encontraron entre 50° S y 52° S en la zona de Bahía Grande. Estas elevadas biomasas serían desarrolladas mediante adaptaciones a las condiciones ambientales locales, particularmente la alta disponibilidad de alimento y la temperatura. La población de T. gaudichaudii analizada presenta un período reproductivo más extendido (primavera-verano), un mayor número de cohortes (dos cohortes principales) y una menor talla de primera madurez (~ 10 mm) que otras poblaciones de latitudes similares. Estas adaptaciones favorecerían una población más numerosa de T. gaudichaudii colocando al ecosistema de la plataforma patagónica austral entre los más favorables para el desarrollo de la especie en todo su rango de distribución global.
    Description: Published
    Keywords: Zooplancton ; Dinámica poblacional ; Historia de vida ; Estructura poblacional ; Amphipoda ; Themisto gaudichaudii ; ASFA15::Y::Zooplankton ; ASFA15::P::Population dynamics ; ASFA15::L::Life history ; ASFA15::P::Population structure
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 69-88
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    La caballa (Scomber japonicus) y las condiciones del ambiente en elárea "El Rincón" 39°40'-41°30'S del Mar Argentino. Septiembre 2000 (2008)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero
    Details
    Publication Date: 2021-05-19
    Description: Between September 1st and 6th a research cruise was carried out in the Buenos Aires shelf area of "El Rincon" 39°40'-41°30'S, Argentine Sea SW Atlantic. The total area studied was 2,527.8 nautical mile2. Knowledge of the commercial fleet location at the time of the survey allowed to intensify sampling in a 'miniarea' of 52,8 nautical mile2. The acoustic assessment of chub mackerel (Scomber japonicus) biomass was 49,511.9 t, 94 of which corresponded to this last area. Fish samples coming from fishing trawls included only adult individuals of 240-460 mm total length (TL) and ages ranging 2-11 years. The limit age was estimated at 13 years and natural and total mortality rates at 0.23 and 0.54, respectively. Oceanographic conditions were those typical of the winter season, characterized by the vertical homogeneity of the water column in temperature and salinity. The isotherms and isohalines distributed parallel to the 50 m isobath with values progressively decreasing from the coast towards the slope. Salinity values allowed to detect two hydrographic regimes: that of the San Matias Gulf 33.8-34.4 located to the West and covering more than half of the study area and the one of the Shelf Waters 33.5-33.79 occurring towards the East. A positive gradient in chlorophyll a concentration was observed in N-S sense and from the coast towards the shelf break. The highest densities of phytoplankton, with dominance of diatoms, were observed in the southern sector. Low concentrations of Alexandrium tamarense and Prorocentrum minimum, two potentially noxious dinoflagellates, were detected. The highest zooplankton biomass associated to the highest salinity values and salinity gradients, represented mostly by Calanoides cf. carinatus, was also detected in the southern sector. The western sector, influenced by the San Matias Gulf regime and characterized by high densities of both, phytoplankton and zooplankton, may constitute a potentially favourable feeding ground for chub mackerel.
    Description: Publisher permission
    Description: Published
    Description: Scombridae, Scomber japonicus, caballa
    Keywords: Fishery oceanography ; Biomass ; Environmental conditions ; Population characteristics ; Echo surveys ; Mackerel fisheries ; Fishery oceanography ; Biomass ; Environmental conditions
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    Anfípodos hiperideos. (2018)
    Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) | Mar del Plata, Argentina
    Details
    Publication Date: 2021-05-19
    Description: En el presente capítulo se presenta una recopilación de las investigaciones sobre anfípodos hiperideos realizadas en el Mar Argentino y adyacencias que abarcan aspectos relacionados con los patrones de distribución y abundancia de las especies que lo habitan y el rol que desempeñan en las tramas tróficas pesqueras. Themisto gaudichaudii, la especie dominante, con una amplia distribución en todo el Mar Argentino, registra el mayor nivel de biomasa en la plataforma patagónica austral. El anfípodo es un importante componente de la dieta del calamar (Illex argentinus) y de peces australes de alto valor comercial tales como la merluza de cola (Macruronus magellanicus), la merluza común (Merluccius hubbsi), la nototenia (Patagonotothen ramsayi), la polaca (Micromesistius australis) y el savorín (Seriolella porosa) que representan el 85 por ciento de la biomasa íctica de la plataforma patagónica austral.
    Description: In this chapter, a compilation of the research on hyperiid amphipods carried out in the Argentine Sea and adjacencies that comprises aspects related to the distribution and abundance patterns of the inhabitant species and the role they play in the fishery food webs is presented. Themisto gaudichaudii, the dominant species, with a wide distribution throughout the Argentine Sea, registers the highest biomass level in the southern patagonian shelf. The amphipod is an important item in argentine squid (Illex argentinus) diet and in that of austral fishes of high commercial value such as longtail hake (Macruronus magellanicus), Argentine hake (Merluccius hubbsi), longtail southern cod (Patagonotothen ramsayi), southern blue whiting (Micromesistius australis) and choisy ruff (Seriolella porosa) that represent 85 percent of the southern patagonian shelf ichthyic biomass.
    Description: Contribución INIDEP 1965
    Description: Published
    Keywords: Morfología animal ; Distribución ; Distribución geográfica ; Distribución vertical ; Alimentación ; Trama alimenticia ; Interacciones ; Themisto gaudichaudii ; ASFA_2015::A::Animal morphology ; ASFA_2015::D::Distribution ; ASFA_2015::G::Geographical distribution ; ASFA_2015::V::Vertical distribution ; ASFA_2015::F::Feeding behaviour ; ASFA_2015::F::Food webs ; ASFA_2015::I::Interactions
    Repository Name: AquaDocs
    Type: Book Section , Refereed
    Format: pp.29-39
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    El zooplancton del hábitat reproductivo de la población bonaerense de anchoíta (Engraulis anchoita), con especial énfasis en crustáceos (2014)
    Details
    Publication Date: 2021-05-19
    Description: The information gathered in Argentine anchovy (Engraulis anchoita) Northern population assessment cruises allowed to perform studies on the zooplankton community of the Buenos Aires shelf since 1995. In this work the most relevant results as regards the taxonomy and size structure of the community, faunistic areas, and 'key' species in relation to the hydrographic conditions and frontal systems of the region are presented. Besides, the consequences those results might have on Argentine anchovy trophic ecology are analyzed. The taxonomic groups studied included copepods, cladocerans, appendicularians, chaetognaths, amphipods, and euphausiids. The multivariate analysis applied to quantitative data allowed to clearly distinguish three faunistic areas with different taxa and oceanographic conditions: Río de la Plata River (ARP), coastal (AC), and shelf (AP). Although predominance of copepods less than 1 mm total length was observed in the three areas, the largest abundances were registered in ARP and AC, Argentine anchovy reproductive habitat. The high abundance, wide distribution and size structure of Oithona nana, O. helgolandica, and Paracalanus parvus turn the species into key prey for the different E. anchoita ontogenic stages.
    Description: Las campañas de evaluación de la población bonaerense de anchoíta (Engraulis anchoita) han permitido realizar estudios sobre la comunidad zooplanctónica de la plataforma bonaerense desde 1995. En este trabajo se presentan los resultados más relevantes respecto de la estructura taxonómica y por talla de la comunidad, áreas faunísticas y especies "clave" en relación con las condiciones hidrográficas y sistemas frontales de la región. Se analizan, además, las consecuencias que esos resultados podrían tener en la ecología trófica de la anchoíta. Los grupos taxonómicos estudiados incluyeron copépodos, cladóceros, apendicularias, quetognatos, anfípodos y eufáusidos. El análisis multivariado aplicado a datos cuantitativos permitió distinguir claramente tres áreas faunísticas con distintas especies representativas y condiciones oceanográficas: Río de la Plata (ARP), costera (AC) y de plataforma (AP). A pesar de que se observó predominancia de copépodos de talla inferior a 1 mm de largo total en las tres áreas, las mayores abundancias se registraron en ARP y AC, hábitat reproductivo de la anchoíta. La gran abundancia, amplia distribución y estructura de tallas de Oithona nana, O. helgolandica y Paracalanus parvus convierte a estas especies en presas clave para los distintos estadios ontogénicos de E. anchoita.
    Description: Published
    Description: Engraulidae
    Description: Engraulis anchoita
    Description: anchoíta
    Description: zooplancton
    Description: biogeografía
    Description: fauna
    Description: frentes
    Description: relaciones tróficas
    Description: abundancia
    Description: pesquerías pelágicas
    Keywords: Zooplankton ; Biogeography ; Fauna ; Fronts ; Trophic relationships ; Abundance ; Pelagic fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Perspectives of marine biodiversity studies in Argentina (2021)
    In:  http://aquaticcommons.org/id/eprint/10044 | 4006 | 2015-06-01 17:36:45 | 10044 | Universidad Nacional de Mar del Plata
    Details
    Publication Date: 2021-06-29
    Description: This paper provides an overview of the research being carried out at the moment by a group of Argentinean scientists working on the subjects of marine biodiversity and oceanography. When the idea of the Census of Marine Life (CoML)was proposed following the Symposium held during the IAPSO-IABO conference in Mar del Plata in October 2001,there was a wide response from the marine scientific community. Information about current research projects, as well as plans for future work in the context of the CoML, were then obtained from about 70 scientists (Appendix I) belonging to 12 institutions located along the Argentinean coast (Appendix II, Figure 1). This has been used to illustrate what is currently being pursued in marine biodiversity in Argentina and which subjects are considered as priority for future research in the area. This paper is, thus, not an historical update of the knowledge of marine biodiversity, but it attempts to give an idea of the current situation and what is planned for the future. The development of an extensive database of what is known on marine biodiversity in the region is considered to be a necessity, but it constitutes a complete project on its own; as such it is included in the proposals for future work (see Future Work in this paper). It is emphasised thatthis synthesis is not exhaustive in the content of the topics being studied or in the number of researchers working in marine biodiversity in the country. It is, though, considered to be a representative sample of the knowledge in marine science in Argentina today. This is a starting point for the CoML project in South America and it is hoped that, as it develops, it will be improved by the active participation, advice and experience of many other scientists in the region.
    Keywords: Aquaculture ; Biology ; Ecology ; Environment
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 371-382
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...