SOME ASPECTS OF THE REPRODUCTIVE BIOLOGY OF TWO POPULATIONS OF MUSCULIUM ARGENTINUM (D'ORBIGNY, 1835) (BIVALVIA: SPHAERIIDAE) FROM SOUTHERN CHILE

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dc.contributor.authorJara-Seguel, Pedro
dc.contributor.authorPeredo, Santiago
dc.contributor.authorVon Brand, Elisabeth
dc.contributor.authorParada Zamorano, Esperanza
dc.date2011
dc.date.accessioned2021-04-30T16:35:23Z
dc.date.available2021-04-30T16:35:23Z
dc.description.abstractSphaerids have adopted a variety of life strategies that have allowed them to show a cosmopolitan distribution. Among these strategies, those related to reproduction, such as sexuality (hermaphroditism), offspring incubation, fertility, number of generations per year, times an individual reproduces during its lifespan, among others, have been decisive with regard to its permanence in time and space, and to colonize and maintain populations in permanent or temporary freshwater bodies. The aim of the current study is to compare reproductive traits of 2 Musculium argentinum populations inhabiting different environments (stream and lake) to determine the potential influence of the environment on reproduction of these populations. During 1 y (October 2006 to 2007) monthly samples were taken at 2 study sites: Lautaro stream (38 degrees 32' S, 72 degrees 27' W) and La Poza, Villarrica Lake (39 degrees 16'27' S. 71 degrees 58'54' W). Sixty specimens were collected monthly from each population. Valve length of each specimen of the sample was registered to determine the size structure of each population. Fifty animals of known valve length were dissected to determine presence and number of brooding sacs in the inner hemibranches, number of embryos in each sac, and number of newly hatched clams. Ten specimens were processed for optical microscopy with routine histological techniques to characterize the gonad activity pattern. Results indicate that M. argentinum is hermaphroditic in both populations, with gonadal activity throughout the year, iteroparous, and with embryos in brooding sacs and newly hatched clams present year-round. These results indicate that differences in the environment did not produce major changes in reproductive strategies in both M. argent loom populations studied.
dc.identifier.citationJOURNAL OF SHELLFISH RESEARCH,Vol.30,287-294,2011
dc.identifier.doi10.2983/035.030.0214
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3171
dc.language.isoen
dc.publisherNATL SHELLFISHERIES ASSOC
dc.sourceJOURNAL OF SHELLFISH RESEARCH
dc.subject.englishSphaeriidae
dc.subject.englishclams
dc.subject.englishMusculium argentinum
dc.subject.englishreproduction
dc.subject.englishChile
dc.titleSOME ASPECTS OF THE REPRODUCTIVE BIOLOGY OF TWO POPULATIONS OF MUSCULIUM ARGENTINUM (D'ORBIGNY, 1835) (BIVALVIA: SPHAERIIDAE) FROM SOUTHERN CHILE
dc.typeArticle
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uct.indizacionSCI
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