Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>

The Bajo Giuliani Lagoon (36 ° 42 ‘20’’ S, 64 ° 16 ‘ 02 ‘’ W) is located south of the city of Santa Rosa, La Pampa, which was stocked with fish during the late 90’s. In this hypertrophic shallow lake, major environmental changes caused mass mortalities of silverside Odontesthes bonariensis, the last...

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Detalles Bibliográficos
Autores principales: Del Ponti, O., Marani, J. L., Ganora, E., Berguño, A., Galea, J. L., Pratts, P.
Formato: Articulo
Lenguaje:Español
Publicado: 2014
Materias:
Ciencias Naturales
La Pampa (Argentina)
Peces
lagunas; La Pampa; Odontesthes bonariensis; mortandad de peces; índices de condición corporal
shallow lake; La Pampa; Odontesthes bonariensis; fish mortalities; body condition index
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/53016
http://www.bacuatica.org/index.php/bacuatica/article/view/26/13
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-53016
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
La Pampa (Argentina)
Peces
lagunas; La Pampa; Odontesthes bonariensis; mortandad de peces; índices de condición corporal
shallow lake; La Pampa; Odontesthes bonariensis; fish mortalities; body condition index
spellingShingle Ciencias Naturales
La Pampa (Argentina)
Peces
lagunas; La Pampa; Odontesthes bonariensis; mortandad de peces; índices de condición corporal
shallow lake; La Pampa; Odontesthes bonariensis; fish mortalities; body condition index
Del Ponti, O.
Marani, J. L.
Ganora, E.
Berguño, A.
Galea, J. L.
Pratts, P.
Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
topic_facet Ciencias Naturales
La Pampa (Argentina)
Peces
lagunas; La Pampa; Odontesthes bonariensis; mortandad de peces; índices de condición corporal
shallow lake; La Pampa; Odontesthes bonariensis; fish mortalities; body condition index
description The Bajo Giuliani Lagoon (36 ° 42 ‘20’’ S, 64 ° 16 ‘ 02 ‘’ W) is located south of the city of Santa Rosa, La Pampa, which was stocked with fish during the late 90’s. In this hypertrophic shallow lake, major environmental changes caused mass mortalities of silverside Odontesthes bonariensis, the last one occurred in 2010. In order to know the current state of the environment, in April 2013 surface water samples were collected, several points were georeferenced and major morphometric parameters were estimated. Fish were captured by trawls and gillnets. The lake has an area of 965 ha with an average depth of 2.31 meters, hyposaline, hard and sodium chlorinated water. Captured register 549 specimens of O. bonariensis and 437 of Jenynsia multidentata, showing a low diversity. The captured silverside ranged from 75 to 343 mm standard length and from 4 to 568 grams. The catch per unit effort in number and biomass was 519 fishes/ night and 99.2 kilos / night respectively, and the trophy size (PSD) was 41.6 6 %. The results indicate that PSD was 16% lower than those recorded before mortality in October 2009. Also, CPUE in number and CPUE in weight obtained were lower than that date. Nevertheless, several index showed better current body conditions.
format Articulo
Articulo
author Del Ponti, O.
Marani, J. L.
Ganora, E.
Berguño, A.
Galea, J. L.
Pratts, P.
author_facet Del Ponti, O.
Marani, J. L.
Ganora, E.
Berguño, A.
Galea, J. L.
Pratts, P.
author_sort Del Ponti, O.
title Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
title_short Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
title_full Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
title_fullStr Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
title_full_unstemmed Parámetros ambientales y pesqueros de un lago somero de La Pampa, luego de una mortandad masiva de <i>Odontesthes bonariensis</i>
title_sort parámetros ambientales y pesqueros de un lago somero de la pampa, luego de una mortandad masiva de <i>odontesthes bonariensis</i>
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/53016
http://www.bacuatica.org/index.php/bacuatica/article/view/26/13
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