Life histories and dynamics of stream and lacustrine populations of musculium argentinum (D'Orbigny, 1842) (Bivalvia: Sphaeriidae) from Southern Chile

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URI:
https://hdl.handle.net/10925/656
Carrera:
Ingeniería Civil Ambiental - Ingeniería en Acuicultura - Ingeniería en Recursos Naturales Renovables
Facultad:
Facultad de Recursos Naturales
Fecha de publicación:
2012-02-23
Datos de publicación:
Malacologia, Vol. 51, N°1, 29-38, 2009
Temas:
Moluscos - Molusco Argentino - Bivalvos
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Resumen:
Life histories and population dynamics of two populations of Musculium argentinum, one inhabiting a fluvial environment and the other a lacustrine one, are compared. Musculium argentinum is oviparous, iteroparous, and sequential incubator, reproducing throughout the year. The life cycle pattern of the fluvial population, unlike the lacustrine one, is characterized by seasonal reproductive variations, more marked in spring and summer, higher fertility and population reproductive productivity (potential recruitment), higher number of marsupial sacs per hemibranch, and smaller size of first reproduction. The content of organic matter and water flow would be the main factors determining the higher population density observed in the fluvial population.

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