Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America

Comparison of Limnoperna fortunei numbers and biomass in screened (5, 15 and 40 mm) and unscreened cages deployed for 18 months in the lower Paraná delta indicates that predators harvest 26-79% (numbers), or 20-85% (biomass) of the mussel population. Predation impact decreases with mussel size. On a...

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Autores principales:	Sylvester, Francisco, Boltovskoy, Demetrio, Cataldo, Daniel Hugo
Publicado:	2007
Materias:	Invasive species Limnoperna fortunei Predation Trophic impact Trophic webs fauna freshwater invasive species mollusc predation trophic structure Eurasia Europe North America Parana River South America Animalia Aves Bivalvia Crustacea Dreissena Dreissena polymorpha Gastropoda Hirudinida Invertebrata Mammalia
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14429985_v32_n4_p403_Sylvester http://hdl.handle.net/20.500.12110/paper_14429985_v32_n4_p403_Sylvester
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_14429985_v32_n4_p403_Sylvester
record_format	dspace
spelling	paper:paper_14429985_v32_n4_p403_Sylvester2023-06-08T16:16:04Z Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America Sylvester, Francisco Boltovskoy, Demetrio Cataldo, Daniel Hugo Invasive species Limnoperna fortunei Predation Trophic impact Trophic webs fauna freshwater invasive species mollusc predation trophic structure Eurasia Europe North America Parana River South America Animalia Aves Bivalvia Crustacea Dreissena Dreissena polymorpha Gastropoda Hirudinida Invertebrata Limnoperna fortunei Mammalia Comparison of Limnoperna fortunei numbers and biomass in screened (5, 15 and 40 mm) and unscreened cages deployed for 18 months in the lower Paraná delta indicates that predators harvest 26-79% (numbers), or 20-85% (biomass) of the mussel population. Predation impact decreases with mussel size. On average, 6 kg of whole live mussel × m-2 × year-1 (0.36 g of dry mussel tissue × m-2 × day-1) were eliminated from the unscreened cages. Cages with 15 and 40 mm screens lost between 1 and 2 kg × m-2 × year -1. Aquatic mammals, birds, and especially fish, are probably the main consumers of large mussels. Small L. fortunei are most probably eaten by fish and also by several invertebrates, including crustaceans, leeches and gastropods. It is suggested that L. fortunei intercepts a significant fraction of the organic carbon that the Paraná-Uruguay rivers flush into the ocean, locally boosting numbers of benthophagous animals, deposit feeders and, indirectly, higher level predators. Our results indicate that only 15 years after its first introduction in South America this invasive species is very actively consumed by local predators, but predatory suppression of the mussel seems very unlikely. Comparisons with the effects reported for the zebra mussel (Dreissena polymorpha) in Europe and North America suggest that L. fortunei is consumed more actively and that its negative impact on the local fauna is more restricted. These differences are attributed to the fact that while D. polymorpha feeds chiefly on plankton, a limited resource, L. fortunei feeds on detrital particulate organic matter, whose supply in these large South American rivers largely exceeds consumption. © 2007 Ecological Society of Australia. Fil:Sylvester, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cataldo, D.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14429985_v32_n4_p403_Sylvester http://hdl.handle.net/20.500.12110/paper_14429985_v32_n4_p403_Sylvester
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Invasive species Limnoperna fortunei Predation Trophic impact Trophic webs fauna freshwater invasive species mollusc predation trophic structure Eurasia Europe North America Parana River South America Animalia Aves Bivalvia Crustacea Dreissena Dreissena polymorpha Gastropoda Hirudinida Invertebrata Limnoperna fortunei Mammalia
spellingShingle	Invasive species Limnoperna fortunei Predation Trophic impact Trophic webs fauna freshwater invasive species mollusc predation trophic structure Eurasia Europe North America Parana River South America Animalia Aves Bivalvia Crustacea Dreissena Dreissena polymorpha Gastropoda Hirudinida Invertebrata Limnoperna fortunei Mammalia Sylvester, Francisco Boltovskoy, Demetrio Cataldo, Daniel Hugo Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
topic_facet	Invasive species Limnoperna fortunei Predation Trophic impact Trophic webs fauna freshwater invasive species mollusc predation trophic structure Eurasia Europe North America Parana River South America Animalia Aves Bivalvia Crustacea Dreissena Dreissena polymorpha Gastropoda Hirudinida Invertebrata Limnoperna fortunei Mammalia
description	Comparison of Limnoperna fortunei numbers and biomass in screened (5, 15 and 40 mm) and unscreened cages deployed for 18 months in the lower Paraná delta indicates that predators harvest 26-79% (numbers), or 20-85% (biomass) of the mussel population. Predation impact decreases with mussel size. On average, 6 kg of whole live mussel × m-2 × year-1 (0.36 g of dry mussel tissue × m-2 × day-1) were eliminated from the unscreened cages. Cages with 15 and 40 mm screens lost between 1 and 2 kg × m-2 × year -1. Aquatic mammals, birds, and especially fish, are probably the main consumers of large mussels. Small L. fortunei are most probably eaten by fish and also by several invertebrates, including crustaceans, leeches and gastropods. It is suggested that L. fortunei intercepts a significant fraction of the organic carbon that the Paraná-Uruguay rivers flush into the ocean, locally boosting numbers of benthophagous animals, deposit feeders and, indirectly, higher level predators. Our results indicate that only 15 years after its first introduction in South America this invasive species is very actively consumed by local predators, but predatory suppression of the mussel seems very unlikely. Comparisons with the effects reported for the zebra mussel (Dreissena polymorpha) in Europe and North America suggest that L. fortunei is consumed more actively and that its negative impact on the local fauna is more restricted. These differences are attributed to the fact that while D. polymorpha feeds chiefly on plankton, a limited resource, L. fortunei feeds on detrital particulate organic matter, whose supply in these large South American rivers largely exceeds consumption. © 2007 Ecological Society of Australia.
author	Sylvester, Francisco Boltovskoy, Demetrio Cataldo, Daniel Hugo
author_facet	Sylvester, Francisco Boltovskoy, Demetrio Cataldo, Daniel Hugo
author_sort	Sylvester, Francisco
title	Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
title_short	Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
title_full	Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
title_fullStr	Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
title_full_unstemmed	Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America
title_sort	fast response of freshwater consumers to a new trophic resource: predation on the recently introduced asian bivalve limnoperna fortunei in the lower paraná river, south america
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14429985_v32_n4_p403_Sylvester http://hdl.handle.net/20.500.12110/paper_14429985_v32_n4_p403_Sylvester
work_keys_str_mv	AT sylvesterfrancisco fastresponseoffreshwaterconsumerstoanewtrophicresourcepredationontherecentlyintroducedasianbivalvelimnopernafortuneiinthelowerparanariversouthamerica AT boltovskoydemetrio fastresponseoffreshwaterconsumerstoanewtrophicresourcepredationontherecentlyintroducedasianbivalvelimnopernafortuneiinthelowerparanariversouthamerica AT cataldodanielhugo fastresponseoffreshwaterconsumerstoanewtrophicresourcepredationontherecentlyintroducedasianbivalvelimnopernafortuneiinthelowerparanariversouthamerica
_version_	1768545571962880000

Fast response of freshwater consumers to a new trophic resource: Predation on the recently introduced Asian bivalve Limnoperna fortunei in the lower Paraná river, South America

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