Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)

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1. Larvae of 'sábalo', Prochilodus lineatus, whose adults represent over 60% of overall fish biomass in the Río de la Plata Catchment, have been observed to feed intensively on veligers of the exotic bivalve Limnoperna fortunei.2. To assess the effects of this dietary shift on the growth o...

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Autores principales: Paolucci, E.M., Thuesen, E.V., Cataldo, D.H., Boltovskoy, D.
Formato: JOUR
Materias:
Exotic bivalve
Growth
Larval fish
Limnoperna fortunei
Veligers
Bivalvia
Copepoda
Crustacea
Prochilodus lineatus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00465070_v55_n9_p1831_Paolucci
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00465070_v55_n9_p1831_Paolucci
record_format dspace
spelling todo:paper_00465070_v55_n9_p1831_Paolucci2023-10-03T14:52:15Z Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America) Paolucci, E.M. Thuesen, E.V. Cataldo, D.H. Boltovskoy, D. Exotic bivalve Growth Larval fish Limnoperna fortunei Veligers Bivalvia Copepoda Crustacea Limnoperna fortunei Prochilodus lineatus 1. Larvae of 'sábalo', Prochilodus lineatus, whose adults represent over 60% of overall fish biomass in the Río de la Plata Catchment, have been observed to feed intensively on veligers of the exotic bivalve Limnoperna fortunei.2. To assess the effects of this dietary shift on the growth of P. lineatus, 28-day laboratory experiments were carried out feeding newly hatched P. lineatus larvae with three diets: zooplankton artificially enriched with L. fortunei veligers; natural zooplankton; and zooplankton artificially enriched with cladocerans and copepods. The average length, weight and gut contents of the fish larvae were assessed weekly and metabolic rates of fish larvae were measured.3. Proportions of veligers in gut contents were always higher than those in the experimental diet: 100, 76 and 21% for veliger-enriched, natural and low-veliger diets, respectively. Larvae fed a veliger-enriched diet grew to a significantly larger size than larvae fed the other two diets. In energetic balance comparisons using metabolic rates and prey energy content, all three diets were sufficient to support metabolism and growth. The greatest values of excess energy at the end of each week were in the veliger-enriched experiments.4. Feeding on veligers of L. fortunei significantly enhances the growth of P. lineatus larvae and supports the idea that this new and abundant resource is selectively preyed upon by P. lineatus during its larval stage. Higher growth rates may stem from the higher energy contents of veligers compared to crustaceans and/or from the lower energy costs of capturing slower prey. © 2010 Blackwell Publishing Ltd. Fil:Paolucci, E.M. 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. Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00465070_v55_n9_p1831_Paolucci
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Exotic bivalve
Growth
Larval fish
Limnoperna fortunei
Veligers
Bivalvia
Copepoda
Crustacea
Limnoperna fortunei
Prochilodus lineatus
spellingShingle Exotic bivalve
Growth
Larval fish
Limnoperna fortunei
Veligers
Bivalvia
Copepoda
Crustacea
Limnoperna fortunei
Prochilodus lineatus
Paolucci, E.M.
Thuesen, E.V.
Cataldo, D.H.
Boltovskoy, D.
Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
topic_facet Exotic bivalve
Growth
Larval fish
Limnoperna fortunei
Veligers
Bivalvia
Copepoda
Crustacea
Limnoperna fortunei
Prochilodus lineatus
description 1. Larvae of 'sábalo', Prochilodus lineatus, whose adults represent over 60% of overall fish biomass in the Río de la Plata Catchment, have been observed to feed intensively on veligers of the exotic bivalve Limnoperna fortunei.2. To assess the effects of this dietary shift on the growth of P. lineatus, 28-day laboratory experiments were carried out feeding newly hatched P. lineatus larvae with three diets: zooplankton artificially enriched with L. fortunei veligers; natural zooplankton; and zooplankton artificially enriched with cladocerans and copepods. The average length, weight and gut contents of the fish larvae were assessed weekly and metabolic rates of fish larvae were measured.3. Proportions of veligers in gut contents were always higher than those in the experimental diet: 100, 76 and 21% for veliger-enriched, natural and low-veliger diets, respectively. Larvae fed a veliger-enriched diet grew to a significantly larger size than larvae fed the other two diets. In energetic balance comparisons using metabolic rates and prey energy content, all three diets were sufficient to support metabolism and growth. The greatest values of excess energy at the end of each week were in the veliger-enriched experiments.4. Feeding on veligers of L. fortunei significantly enhances the growth of P. lineatus larvae and supports the idea that this new and abundant resource is selectively preyed upon by P. lineatus during its larval stage. Higher growth rates may stem from the higher energy contents of veligers compared to crustaceans and/or from the lower energy costs of capturing slower prey. © 2010 Blackwell Publishing Ltd.
format JOUR
author Paolucci, E.M.
Thuesen, E.V.
Cataldo, D.H.
Boltovskoy, D.
author_facet Paolucci, E.M.
Thuesen, E.V.
Cataldo, D.H.
Boltovskoy, D.
author_sort Paolucci, E.M.
title Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
title_short Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
title_full Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
title_fullStr Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
title_full_unstemmed Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)
title_sort veligers of an introduced bivalve, limnoperna fortunei, are a new food resource that enhances growth of larval fish in the paraná river (south america)
url http://hdl.handle.net/20.500.12110/paper_00465070_v55_n9_p1831_Paolucci
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AT cataldodh veligersofanintroducedbivalvelimnopernafortuneiareanewfoodresourcethatenhancesgrowthoflarvalfishintheparanariversouthamerica
AT boltovskoyd veligersofanintroducedbivalvelimnopernafortuneiareanewfoodresourcethatenhancesgrowthoflarvalfishintheparanariversouthamerica
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