%0 Journal Article
%T Los crust¨˘ceos dec¨˘podos del Atl¨˘ntico sudoccidental (25o-55oS): distribuci¨®n y ciclos de vida
%A Spivak
%A Eduardo D.
%J Investigaciones marinas
%D 1997
%I Scientific Electronic Library Online
%R 10.4067/S0717-71781997002500006
%X a number of 243 species of decapod crustaceans, belonging to 49 families, were found in the southwestern atlantic, between 25 and 55ˇăs. suborder dendrobranchiata includes 6 families with 23 species. suborden pleocyemata has 10 families of caridea with 35 species, 1 family of astacidea with 2 species, 1 family of palinura with 1 species, 2 families of thalassinidea with 7 species, 8 families of anomura with 44 species and 21 families of brachyura with 131 species. in the warm-temperate region of the southwestern atlantic there are 200 species; 73% of them spread to the north ("tropical species"), 27% are found between r¨Şo de janeiro and tierra del fuego. from these species, 44 are endemic. the number of tropical species diminishes at higher latitudes, although different families show different patterns; environmental changes at 29o-35ˇăs, mainly the fall in winter temperatures and the effects of la plata river, seem to limit their southern spread. cold-temperate region is represented by 39 species; 24 of them also inhabited the southern pac¨Şfic ocean. many cold-temperate species (50%) reach lower latitudes in the atlantic (42ˇăs or less), but in deep waters. information on geographic distribution, life cycles, and economic importance of warm-temperate species is given. the atlantic and pacific decapod fauna of southern south america have a similar number of species and families, but differences in their composition are detected
%K crustacea
%K decapoda
%K geographic distribution
%K life cycles
%K southwestern atlantic.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-71781997002500006&lng=en&nrm=iso&tlng=en