Population structure, growth and production of the surf clam Donax hanleyanus (Bivalvia: Donacidae) from northern Argentinean beaches, supplement to: Herrmann, Marko (2009): Population dynamics of the surf clams Donax hanleyanus and Mesodesma mactroides from open-Atlantic beaches off Argentina (Populationsdynamik der Brandungsmuscheln Donax hanleyanus und Mesodesma mactroides an offenen Atlantikstränden Argentiniens). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 585, 235 pp

Marko Herrmann
The surf clams Mesodesma mactroides Reeve, 1854 and Donax hanleyanus Philippi, 1847 are the two dominating species in macrobenthic communities of sandy beaches off northern Argentina, with the latter now surpassing M. mactroides populations in abundance and biomass. Before stock decimation caused by exploitation (during the 1940s and 1950s) and mass mortality events (1995, 1999 and 2007) M. mactroides was the prominent primary consumer in the intertidal ecosystem and an important economic resource in Argentina....
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