%0 Journal Article
%T Population structure of Uncancylus concentricus (d'Orbigny, 1835) (Ancylidae, Pulmonata, Basommatophora) in the Multiple Use Reserve Mart¨ªn Garc¨ªa Island, Upper R¨ªo de la Plata, Argentina
%A Mart¨ªn
%A SM
%A D¨ªaz
%A AC
%J Brazilian Journal of Biology
%D 2012
%I Scientific Electronic Library Online
%R 10.1590/S1519-69842012000100008
%X the present work analyzes the population dynamics of uncancylus concentricus in natural conditions in the northeastern coastal area of the multiple use natural reserve isla mart¨ªn garc¨ªa (beach of basural), buenos aires, argentina. mart¨ªn garc¨ªa island is located in the upper r¨ªo de la plata, to the south of the mouth of the uruguay river (34¡ã 11' 25" s and 58¡ã 15'38" w). monthly collections were made from august 2005 to december 2006. the size frequency of the u. concentricus population throughout the sampling period ranges from 1.2 to 8.3 m. the changes in the size frequencies throughout the months surveyed indicate a variable distribution pattern because of the increase and decrease in water flow, but we observed a peak in the frequency of individuals within the size range 3.5 to 4.5 mm in the population. it can be concluded that this species lives for at least a year in the wild since the juveniles are highly abundant in spring and summer.
%K uncancylus concentricus
%K population dynamics
%K martin garc¨ªa island
%K argentina.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1519-69842012000100008&lng=en&nrm=iso&tlng=en