¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?

It has been proven that otoliths reflect morphology, morphometry and chemical composition of the environment that fish frequent. However, it has not been established if extreme environmental changes can be reflected by such structure. In this study, we analyze the morphology and morphometry of otoli...

Descripción completa

Detalles Bibliográficos
Autores principales: Avigliano, Esteban, Tombari, A., Volpedo, Alejandra V.
Formato: Articulo
Lenguaje:Español
Publicado: 2012
Materias:
Ciencias Naturales
Laguna Chasicó (Buenos Aires, Argentina)
otolito
Odontesthes bonariensis
estrés ambiental
otolith
environmental stress
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/68856
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-68856
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
Laguna Chasicó (Buenos Aires, Argentina)
otolito
Odontesthes bonariensis
estrés ambiental
otolith
environmental stress
spellingShingle Ciencias Naturales
Laguna Chasicó (Buenos Aires, Argentina)
otolito
Odontesthes bonariensis
estrés ambiental
otolith
environmental stress
Avigliano, Esteban
Tombari, A.
Volpedo, Alejandra V.
¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
topic_facet Ciencias Naturales
Laguna Chasicó (Buenos Aires, Argentina)
otolito
Odontesthes bonariensis
estrés ambiental
otolith
environmental stress
description It has been proven that otoliths reflect morphology, morphometry and chemical composition of the environment that fish frequent. However, it has not been established if extreme environmental changes can be reflected by such structure. In this study, we analyze the morphology and morphometry of otolith sagitta of silverside (Odontesthes bonariensis) living in a setting that shows important environmental changes as Chasicó lake in Buenos Aires province (38°37.380’S- 63°4.735’W). We compared physicochemical parameters of water (pH, conductivity, ion concentration Ca2+, Mg2+ y Cl-) measured in the lake in 2010 with bibliographic data of 1999, 2003 and 2004 and different morphometric variables of silverside otoliths captured in 1998 and in 2010. The ion concentration of Ca2+, Mg2+ y Cl- increased between 11% and 90% in the period 1999-2010; the lake reduced its surface 20% in conjunction with a decrease in precipitations. We observed alterations in the distinctive morphological otolith pattern in about 18% of the individuals sampled, like irregular edges and perforations. We found a smaller width-length relation of the otolith for the year 2010 thus, indicating a decrease in its circularity. These morphological variations could be provoked by alterations in calcium carbonate deposition related to an increase in salinity and conductivity due to reduction in the surface of the lake. In conclusion, this study would indicate that morphology and morphometry of otoliths reflect environmental stress.
format Articulo
Articulo
author Avigliano, Esteban
Tombari, A.
Volpedo, Alejandra V.
author_facet Avigliano, Esteban
Tombari, A.
Volpedo, Alejandra V.
author_sort Avigliano, Esteban
title ¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
title_short ¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
title_full ¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
title_fullStr ¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
title_full_unstemmed ¿El otolito de pejerrey (Odontesthes bonariensis), refleja el estrés ambiental?
title_sort ¿el otolito de pejerrey (odontesthes bonariensis), refleja el estrés ambiental?
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/68856
work_keys_str_mv AT aviglianoesteban elotolitodepejerreyodontesthesbonariensisreflejaelestresambiental
AT tombaria elotolitodepejerreyodontesthesbonariensisreflejaelestresambiental
AT volpedoalejandrav elotolitodepejerreyodontesthesbonariensisreflejaelestresambiental
bdutipo_str Repositorios
_version_ 1764820481598291969

Ejemplares similares