Adjustments of Limnoperna fortunei (Bivalvia: Mytilidae) after ten years of invasion in the Americas
Limnoperna fortunei (Dunker, 1857) or golden mussel invaded South America through the Río de la Plata estuary in 1991. Ten years later, the golden mussel lives in the main rivers of the Plata Basin. The gonadal cycle and the population settlement in a temperate climate are discussed in this article....
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| Autores principales: | , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_07308000_v22_n1_p141_Darrigran |
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| Sumario: | Limnoperna fortunei (Dunker, 1857) or golden mussel invaded South America through the Río de la Plata estuary in 1991. Ten years later, the golden mussel lives in the main rivers of the Plata Basin. The gonadal cycle and the population settlement in a temperate climate are discussed in this article. This basic knowledge is needed to assist industries that may suffer the effects of macrofouling and also increment the ability to predict potential invasions of other countries. The study of population density and reproductive cycle was performed in Río de la Plata estuary, Argentina. The temporal variation of population density from data of settlement and age structure collected between 1991 and 2001 is presented. The reproductive cycle between August 1998 and March 2000 was analyzed. Through the analysis of oocyte percentages four gonad spawning events were observed. The spawning events appear regulated by temperature changes. After the initial increase in population density following the invasion, there was a decrease. The population appeared stabilized at one third of the initial peak. |
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