Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)

We studied experimentally the feeding selectivity of larvae of Prochilodus lineatus (Pisces), with particular emphasis on the role of veligers of the exotic bivalve Limnoperna fortunei. Three concentrations of veligers were offered to three developmental stages of P. lineatus. Veliger concentrations...

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Autores principales:	Paolucci, E.M., Cataldo, D.H., Boltovskoy, D.
Formato:	JOUR
Materias:	Exotic bivalve Larval fish Limnoperna fortunei veligers Prey selection Prochilodus lineatus bivalve finfish flea food selection growth response introduced species larva prey selection zooplankton Bivalvia Copepoda Crustacea Curimatidae Limnoperna Limnoperna fortunei Pisces
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_13862588_v44_n1_p255_Paolucci
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_13862588_v44_n1_p255_Paolucci
record_format	dspace
spelling	todo:paper_13862588_v44_n1_p255_Paolucci2023-10-03T16:12:19Z Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae) Paolucci, E.M. Cataldo, D.H. Boltovskoy, D. Exotic bivalve Larval fish Limnoperna fortunei veligers Prey selection Prochilodus lineatus bivalve finfish flea food selection growth response introduced species larva prey selection zooplankton Bivalvia Copepoda Crustacea Curimatidae Limnoperna Limnoperna fortunei Pisces Prochilodus lineatus We studied experimentally the feeding selectivity of larvae of Prochilodus lineatus (Pisces), with particular emphasis on the role of veligers of the exotic bivalve Limnoperna fortunei. Three concentrations of veligers were offered to three developmental stages of P. lineatus. Veliger concentrations were: (1) higher than in the field ("enriched", 0. 09 ind. ml-1), (2) unmodified from field conditions ("normal", 0. 06 ind. ml-1), and (3) lower than in the field ("low", 0. 02 ind. ml-1). Fish developmental stages were protolarvae (approx. 10 days old), mesolarvae (17 days), and metalarvae (25 days). Proportions (in terms of numbers and biomass) and selectivity values were calculated for each prey item evaluated: veligers, small cladocerans + nauplii, medium-sized cladocerans, copepodits, and large cladocerans + copepods. Protolarvae and mesolarvae consumed veligers almost exclusively (88-90%, both in numbers and in biomass) when offered prey enriched in veligers, whereas for metalarvae veligers represented only 16. 0% of the food consumed. At lower veliger concentrations, only protolarvae preferred Limnoperna veligers, whereas older fishes switched gradually to crustacean plankton. We conclude that veligers are preferred by the early fish developmental stages, and we speculate that this may be because their slower swimming makes them easier to capture than planktonic crustaceans. However, as fish larvae grow larger, veligers become too small a prey for their energetic needs, and they switch to larger items like cladocerans and copepods. We anticipate that this new and abundant food resource has an important impact on the survival and growth of P. lineatus. © Springer Science+Business Media B.V. 2009. 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_13862588_v44_n1_p255_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 Larval fish Limnoperna fortunei veligers Prey selection Prochilodus lineatus bivalve finfish flea food selection growth response introduced species larva prey selection zooplankton Bivalvia Copepoda Crustacea Curimatidae Limnoperna Limnoperna fortunei Pisces Prochilodus lineatus
spellingShingle	Exotic bivalve Larval fish Limnoperna fortunei veligers Prey selection Prochilodus lineatus bivalve finfish flea food selection growth response introduced species larva prey selection zooplankton Bivalvia Copepoda Crustacea Curimatidae Limnoperna Limnoperna fortunei Pisces Prochilodus lineatus Paolucci, E.M. Cataldo, D.H. Boltovskoy, D. Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
topic_facet	Exotic bivalve Larval fish Limnoperna fortunei veligers Prey selection Prochilodus lineatus bivalve finfish flea food selection growth response introduced species larva prey selection zooplankton Bivalvia Copepoda Crustacea Curimatidae Limnoperna Limnoperna fortunei Pisces Prochilodus lineatus
description	We studied experimentally the feeding selectivity of larvae of Prochilodus lineatus (Pisces), with particular emphasis on the role of veligers of the exotic bivalve Limnoperna fortunei. Three concentrations of veligers were offered to three developmental stages of P. lineatus. Veliger concentrations were: (1) higher than in the field ("enriched", 0. 09 ind. ml-1), (2) unmodified from field conditions ("normal", 0. 06 ind. ml-1), and (3) lower than in the field ("low", 0. 02 ind. ml-1). Fish developmental stages were protolarvae (approx. 10 days old), mesolarvae (17 days), and metalarvae (25 days). Proportions (in terms of numbers and biomass) and selectivity values were calculated for each prey item evaluated: veligers, small cladocerans + nauplii, medium-sized cladocerans, copepodits, and large cladocerans + copepods. Protolarvae and mesolarvae consumed veligers almost exclusively (88-90%, both in numbers and in biomass) when offered prey enriched in veligers, whereas for metalarvae veligers represented only 16. 0% of the food consumed. At lower veliger concentrations, only protolarvae preferred Limnoperna veligers, whereas older fishes switched gradually to crustacean plankton. We conclude that veligers are preferred by the early fish developmental stages, and we speculate that this may be because their slower swimming makes them easier to capture than planktonic crustaceans. However, as fish larvae grow larger, veligers become too small a prey for their energetic needs, and they switch to larger items like cladocerans and copepods. We anticipate that this new and abundant food resource has an important impact on the survival and growth of P. lineatus. © Springer Science+Business Media B.V. 2009.
format	JOUR
author	Paolucci, E.M. Cataldo, D.H. Boltovskoy, D.
author_facet	Paolucci, E.M. Cataldo, D.H. Boltovskoy, D.
author_sort	Paolucci, E.M.
title	Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
title_short	Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
title_full	Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
title_fullStr	Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
title_full_unstemmed	Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)
title_sort	prey selection by larvae of prochilodus lineatus (pisces: curimatidae): indigenous zooplankton versus veligers of the introduced bivalve limnoperna fortunei (bivalvia: mitilidae)
url	http://hdl.handle.net/20.500.12110/paper_13862588_v44_n1_p255_Paolucci
work_keys_str_mv	AT paolucciem preyselectionbylarvaeofprochiloduslineatuspiscescurimatidaeindigenouszooplanktonversusveligersoftheintroducedbivalvelimnopernafortuneibivalviamitilidae AT cataldodh preyselectionbylarvaeofprochiloduslineatuspiscescurimatidaeindigenouszooplanktonversusveligersoftheintroducedbivalvelimnopernafortuneibivalviamitilidae AT boltovskoyd preyselectionbylarvaeofprochiloduslineatuspiscescurimatidaeindigenouszooplanktonversusveligersoftheintroducedbivalvelimnopernafortuneibivalviamitilidae
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Prey selection by larvae of Prochilodus lineatus (Pisces: Curimatidae): Indigenous zooplankton versus veligers of the introduced bivalve Limnoperna fortunei (Bivalvia: Mitilidae)

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