Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano

The Martín stream is an urban water course with moderate anthropic impact located in La Plata (Buenos Aires). Gymnogeophagus meridionalis Reis & Malabarba, 1988 is a fish of Cichlids family that is common in natural environments or those modified by human. The paper objective is to characterize...

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Detalles Bibliográficos
Autores principales: Yorojo Moreno, Vivian, García, Ignacio Daniel, Maroñas, Miriam E., Colautti, Darío César
Formato: Articulo
Lenguaje:Español
Publicado: 2017
Materias:
Zoología
Dieta
Arroyo pampeano
Impacto antrópico
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87088
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87088
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Zoología
Dieta
Arroyo pampeano
Impacto antrópico
Argentina
spellingShingle Zoología
Dieta
Arroyo pampeano
Impacto antrópico
Argentina
Yorojo Moreno, Vivian
García, Ignacio Daniel
Maroñas, Miriam E.
Colautti, Darío César
Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
topic_facet Zoología
Dieta
Arroyo pampeano
Impacto antrópico
Argentina
description The Martín stream is an urban water course with moderate anthropic impact located in La Plata (Buenos Aires). Gymnogeophagus meridionalis Reis & Malabarba, 1988 is a fish of Cichlids family that is common in natural environments or those modified by human. The paper objective is to characterize the G. merdionalis diet at the mentioned stream. Fish sampling was carried out in autumn, winter and spring 2014 and summer of 2015 in two areas with different land uses M1 (horticultural) and M2 (urban). A total of 173 specimens were collected and composition, volume and number per food item were determinated in the digestive contents. The alimentary importance index indicated that Chironomid larvae and Copepods are the main trophic resources. The Kolmogorov-Smirnov test did not detect qualitative significant differences between the fish diets from M1 and M2. However, the relative repletion index showed very high values in the latter site in spring and summer. The Amundsen method determined two types of feeding strategies one of them as a specialist type in the intake of Chironomid larvae during most of the year and another generalist in the spring. The best relative condition was observed in winter and spring in both sampling sites. The Martín stream provide to G. meridionalis a restrict diet that is reflected in low quantity of item consumed by comparison with item consumed from some fish that inhabit streams with low perturbation in this region. This is likely to be related to a limited supply of food rather than to a selection of prey by the species.
format Articulo
Articulo
author Yorojo Moreno, Vivian
García, Ignacio Daniel
Maroñas, Miriam E.
Colautti, Darío César
author_facet Yorojo Moreno, Vivian
García, Ignacio Daniel
Maroñas, Miriam E.
Colautti, Darío César
author_sort Yorojo Moreno, Vivian
title Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
title_short Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
title_full Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
title_fullStr Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
title_full_unstemmed Hábitos alimentarios de <i>Gymnogeophagus meridionalis</i> (Osteichthyes, Cichlidae) en un arroyo urbano
title_sort hábitos alimentarios de <i>gymnogeophagus meridionalis</i> (osteichthyes, cichlidae) en un arroyo urbano
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87088
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