Análisis de las interacciones tróficas en microcosmos: estudio preliminar

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The aim of the study was to analyze the effect of planktivorous fish on the trophic interactions between a palatable algae and a filter feeding (Daphnia spinulata). A lab experiment was performed using microcosms of 2 l. Three treatments were carried out: with fishes (P), with cladocerans (C), with...

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Detalles Bibliográficos
Autores principales: Ruiz, Gonzalo Carlos, Ardohain, Diego Martín, Solari, Lía Cristina, Gabellone, Néstor Adrián
Formato: Articulo
Lenguaje:Español
Publicado: 2008
Materias:
Ciencias Naturales
interacciones tróficas
microcosmos
algas palatables
peces planctivoros
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/67988
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-67988
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
interacciones tróficas
microcosmos
algas palatables
peces planctivoros
spellingShingle Ciencias Naturales
interacciones tróficas
microcosmos
algas palatables
peces planctivoros
Ruiz, Gonzalo Carlos
Ardohain, Diego Martín
Solari, Lía Cristina
Gabellone, Néstor Adrián
Análisis de las interacciones tróficas en microcosmos: estudio preliminar
topic_facet Ciencias Naturales
interacciones tróficas
microcosmos
algas palatables
peces planctivoros
description The aim of the study was to analyze the effect of planktivorous fish on the trophic interactions between a palatable algae and a filter feeding (Daphnia spinulata). A lab experiment was performed using microcosms of 2 l. Three treatments were carried out: with fishes (P), with cladocerans (C), with fishes and cladocerans (CP) and a control (A). They were inoculated with 200 ml of Scenedesmus acutus. The experiment lasted 5 days and samples were taken every 8 hours. Microcosms were kept at a 16:8 hours of light:dark cycle with constant temperature and with a non limiting level of nutrients (P and N) for algal development. pH values were constant. Turbidity was used as an indirect means of algal biomass ( r = 0.95; p < 0.05). The clearing effect of D. spinulata was more marked at the end of the experiment, with turbidity dropping down in the treatment without fish (C), and showing significant differences when compared with treatments (P) and (A). Differences in turbidity between (P) and (A) showed a possible recycling of nutrients by the fish. Algal palatability was also evident, because cladoceran populations were tripled in density. In (CP), predation by fish was observed resulting in the absence of Daphnia spinulata at the end of the experiment. In experiments with algal mono specific culture, turbidity could be used as an indirect means of algal biomass because, since its register is immediate, it can be measured repeatedly causing minimal disturbance.
format Articulo
Articulo
author Ruiz, Gonzalo Carlos
Ardohain, Diego Martín
Solari, Lía Cristina
Gabellone, Néstor Adrián
author_facet Ruiz, Gonzalo Carlos
Ardohain, Diego Martín
Solari, Lía Cristina
Gabellone, Néstor Adrián
author_sort Ruiz, Gonzalo Carlos
title Análisis de las interacciones tróficas en microcosmos: estudio preliminar
title_short Análisis de las interacciones tróficas en microcosmos: estudio preliminar
title_full Análisis de las interacciones tróficas en microcosmos: estudio preliminar
title_fullStr Análisis de las interacciones tróficas en microcosmos: estudio preliminar
title_full_unstemmed Análisis de las interacciones tróficas en microcosmos: estudio preliminar
title_sort análisis de las interacciones tróficas en microcosmos: estudio preliminar
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/67988
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