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  • 1
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    Esquema biogeográfico del Mar Argentino (2009)
    Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
    Details
    Publication Date: 2021-05-19
    Description: The fauna of the Argentine (SW Atlantic Ocean) shelf allows to distinguish two biogeographic provinces: the Argentine and the Magellanic that are part of the Subtropical and Subantarctic Regions. The former extends from 30° S-32° S to 41° S-44° S and from the coast to the 82-95 m isobath, between 35° S-39° S, to 70 m depth in the north Patagonia. The latter extends from the Valdés Peninsula to the southern extreme and from 43° S northward, east area of the Argentine Province. The different physiographic characteristics allow to distinguish movable sandy bottoms in the Argentine Province and in the Magellanic gravel bottoms where large algae grow. The climatic differences explain the prevalence of northern winds in the first, where warm and temperate-cold coastal waters alternate and western strong winds in the second with net predominance of subantarctic waters from the Malvinas Current. The factors mentioned explain the differences in the faunal composition of both Provinces; the Argentina is characterized by a marked heterogeneity of its components and the Magellanic by its homogeneity and own taxa. The detailed analysis of the faunal composition of both Provinces performed using benthonic organisms (echinoderms, crustaceans and molluscs) and nektonic (fishes) resulted in subdivisions that correspond to the Uruguayan District, down to 38° S-39° S and the Rionegrin, south of said latitude in the Argentine Province and the Chubutian and Southpatagonic, north and south of 47° S in the Magellanic. The hydrographic regime allowed to establish the Santacrucean and Fuegian Subdistricts within the Southpatagonic District, which supports the warm drift theory in the Uruguayan and Rionegrin Districts of the Argentine Province and in the Chubutian of the Magellanic. The feature that characterizes the Southpatagonic District is the absence of a warm water tongue.
    Description: Published
    Keywords: Biota ; Biogeography ; Biogeography ; Faunal provinces ; Biota ; Ecological distribution ; Historical account
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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    El plancton de Mar del Plata durante el período 1961-1962 (Buenos Aires, Argentina) (2021)
    In:  http://aquaticcommons.org/id/eprint/20582 | 125 | 2016-04-27 23:33:15 | 20582 | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
    Details
    Publication Date: 2021-07-11
    Description: The first part presents a general picture of the composition of the coastal plankton near Mar del Plata (Buenos Aires prov., Argentina) between August 1961-August 1962. Especially noted is the abundance of Noctiluca from October to the end of March. The second part deals with the plankton collected during a short cruise, named Operación Mar del Plata 1, planned to survey coastal waters. In the third part the author gives the descriptions of some new or interesting species. A chain-forming Gymnodinium is reported as G. catenatum; some differences with Graham description, could be due to the fact that he studied only preserved material. Oblea baculifera is a new species belonging to the new genus Oblea, of the Diplopsalis group, created for some species previ¬ously known as Peridiniopsis. A key of the included species is given. The other new species are Peridinium aspidiotum, P. anomaloplaxum, P. lipopodium and Gonyaulax fratercula, all of them carefully described and depicted. Sticholonche zanclea (Radiolaria), Calsiosolenia sinuosa (Coccolithophoridae) and Tintinnopsis levigata (Tintinnida) are reported for the first time in the South-Atlantic. For T. levigata ?, Balech, 1939, a new name has been created: T. tregouboffi. Some unknown details of the protoplasm of the silicoflagellate Dictyocha octonaria are described. In the fourth part the author compares the plankton taken in Mar del Plata with the previously studied at Pto. Quequén. The plankton of March-April points to an invasion of oceanic warm waters from the Brazilian Current System.
    Keywords: Biology ; phytoplankton ; coastal zone ; annual variations ; identification keys ; new records ; organism morphology ; geographical distribution ; fitoplancton ; zona costera ; variaciones anuales ; claves de identificación ; morfología ; distribución geográfica ; Atlántico Sudoccidental ; Argentina ; Buenos Aires ; Mar del Plata
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 1-59
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  • 3
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    La familia Podolampacea (Dinoflagellata) (2021)
    In:  http://aquaticcommons.org/id/eprint/20576 | 125 | 2016-04-27 23:30:33 | 20576 | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
    Details
    Publication Date: 2021-07-11
    Description: Este estudio tiene como finalidad dar a conocer la tabulación de los géneros Blepharocysta y Podolampas, hacer un estudio detallado de sus especies, contribuir al conocimiento de la distribución geográfica, sentar las bases para establecer sus relaciones filogenéticas con otros dinoflagelados y probar la unidad de la familia. Este trabajo constituye una revisión completa de todas las especies conocidas.
    Keywords: Biology ; Ecology ; taxonomy ; organism morphology ; identification keys ; taxonomía ; morfología de organismos ; clave de identificación ; Podolampas ; Blepharocysta ; Dinoflagellata
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 1-33
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