PERSONAL DE APOYO
CATALDO Daniel Hugo
artículos
Título:
Filtration rates of the invasive pest bivalve Limnoperna fortunei as a function of size and temperature
Autor/es:
FRANCISCO SYLVESTER, JIMENA DORADO, DEMETRIO BOLTOVSKOY, A NGELA JUAREZ Y DANUEL CATALDO
Revista:
HYDROBIOLOGIA
Referencias:
Año: 2005 vol. 534 p. 71 - 80
ISSN:
0018-8158
Resumen:
Clearance rates of Limnoperna fortunei (Bivalvia) were investigated in laboratory experiments using
monocultures of the alga Chlorella vulgaris. Experimental conditions included two mollusc sizes (15 and
23 mm), and three water temperatures (15, 20 and 25 C) covering the normal seasonal range in the lower
Parana´ river and Rý´ o de la Plata estuary. Filtration rates obtained were, for the larger mussels: 9.9, 13.1 and
17.7 ml mg tissue dry weight1 h1 at 15, 20 and 25 C, respectively; and for the smaller ones: 17.7, 20.8
and 29.5 ml mg1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.Limnoperna fortunei (Bivalvia) were investigated in laboratory experiments using
monocultures of the alga Chlorella vulgaris. Experimental conditions included two mollusc sizes (15 and
23 mm), and three water temperatures (15, 20 and 25 C) covering the normal seasonal range in the lower
Parana´ river and Rý´ o de la Plata estuary. Filtration rates obtained were, for the larger mussels: 9.9, 13.1 and
17.7 ml mg tissue dry weight1 h1 at 15, 20 and 25 C, respectively; and for the smaller ones: 17.7, 20.8
and 29.5 ml mg1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.Chlorella vulgaris. Experimental conditions included two mollusc sizes (15 and
23 mm), and three water temperatures (15, 20 and 25 C) covering the normal seasonal range in the lower
Parana´ river and Rý´ o de la Plata estuary. Filtration rates obtained were, for the larger mussels: 9.9, 13.1 and
17.7 ml mg tissue dry weight1 h1 at 15, 20 and 25 C, respectively; and for the smaller ones: 17.7, 20.8
and 29.5 ml mg1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.C) covering the normal seasonal range in the lower
Parana´ river and Rý´ o de la Plata estuary. Filtration rates obtained were, for the larger mussels: 9.9, 13.1 and
17.7 ml mg tissue dry weight1 h1 at 15, 20 and 25 C, respectively; and for the smaller ones: 17.7, 20.8
and 29.5 ml mg1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.1 h1 at 15, 20 and 25 C, respectively; and for the smaller ones: 17.7, 20.8
and 29.5 ml mg1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.1 h1. Differences between sizes and between temperatures (except 15 vs. 20 C) were
statistically significant. In absolute terms larger animals have higher clearance rates, but as a function of
body mass smaller individuals feed more actively. Within the range of experimental values used, filtration
rates were positively associated with water temperature. These clearance rates (125350 ml
individual1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.1 h1) are among the highest reported for suspension feeding bivalves, including the invasive
species Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.Dreissena polymorpha, D. bugensis and Corbicula fluminea. High filtration rates, associated with the
very high densities of this mollusc in the Parana´ watershed (up to over 200,000 ind m2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.2) suggest that its
environmental impact may be swiftly changing ecological conditions in the areas colonized.