IADO 05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
Daily activity pattern of Heleobia parchappii (Gastropoda: Hydrobiidae) under laboratory conditions
Autor/es:
CAZZANIGA NÉSTOR J; FIORI SANDRA MARCELA
Revista:
Journal of Freshwater Ecology
Editorial:
Oikos Publishers, Inc
Referencias:
Lugar: La Crosse, WI 54602-2558 USA; Año: 2006 vol. 21 p. 65 - 70
ISSN:
0270-5060
Resumen:
Crawling, floating and burrowing abilities of the Argentine freshwater mudsnail, Heleobia parchappii (dOrbigny 1835), were experimentally analyzed. Floating showed a cyclic circadian pattern, young snails using floatation more frequently than adults; males and females did not show a differential use of a floating escape strategy. Though males of freshwater prosobranchs are expected to be more active than females as an adaptive outcome of reproductive fitness, crawling velocity of Heleobia parchappii did not differ significantly between sexes, but males were effectively more active than females on an activity-time allocation basis.
