Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures

Corbicula fluminea was collected at monthly intervals in November 1991-June 1993, and in March, April 1995 at a site located in the vicinity of strong sources of industrial and sewage effluents (confluence of the Rivers San Antonio and Vinculacion, SaV); and in November 1994 and March, April 1995 at...

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Autores principales: Boltovskoy, Demetrio, Correa, Nancy, Cataldo, Daniel Hugo, Stripeikis, Jorge Daniel, Tudino, Mabel Beatriz
Publicado: 1997
Materias:
Corbicula fluminea
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00039136_v138_n4_p483_Boltovskoy
http://hdl.handle.net/20.500.12110/paper_00039136_v138_n4_p483_Boltovskoy
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00039136_v138_n4_p483_Boltovskoy
record_format dspace
spelling paper:paper_00039136_v138_n4_p483_Boltovskoy2023-06-08T14:24:48Z Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures Boltovskoy, Demetrio Correa, Nancy Cataldo, Daniel Hugo Stripeikis, Jorge Daniel Tudino, Mabel Beatriz Corbicula fluminea Corbicula fluminea was collected at monthly intervals in November 1991-June 1993, and in March, April 1995 at a site located in the vicinity of strong sources of industrial and sewage effluents (confluence of the Rivers San Antonio and Vinculacion, SaV); and in November 1994 and March, April 1995 at a presumably less polluted one (Parana de las Palmas River, PP), in the lower delta of the Parana River (Argentina). Abundances at SaV ranged between 430 and 10,300 ind. m-2 being noticeably higher than those at PP, as well as those at 19 stations between and around these two locales. Shell lengths at SaV were monotonous throughout the 19-months period, over 90% of the clams varying between 16 and 22.5 mm in length; no discernible cohorts were recorded. At PP, on the other hand, juveniles below 5 mm were largely dominant, and shells above 25-30 mm in length were very common. Larvae retrieved from the gills of gravid clams showed much greater mortality rates in waters from SaV (up to 75 % after 120 hr), than in those from PP and in the control (approximately 10 % after 192 hr). The first internal growth-related mark in clams from SaV was closer to the umbo (mean: 14.2 mm), than that in clams from PP (mean: 24 mm). It is concluded that inadequate water quality at SaV is responsible for 100 % mortalities of newborns, for dwarfed adult clams, and for the lack of discernible cohorts. Fil:Boltovskoy, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Correa, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cataldo, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Stripeikis, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tudino, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00039136_v138_n4_p483_Boltovskoy http://hdl.handle.net/20.500.12110/paper_00039136_v138_n4_p483_Boltovskoy
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Corbicula fluminea
spellingShingle Corbicula fluminea
Boltovskoy, Demetrio
Correa, Nancy
Cataldo, Daniel Hugo
Stripeikis, Jorge Daniel
Tudino, Mabel Beatriz
Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
topic_facet Corbicula fluminea
description Corbicula fluminea was collected at monthly intervals in November 1991-June 1993, and in March, April 1995 at a site located in the vicinity of strong sources of industrial and sewage effluents (confluence of the Rivers San Antonio and Vinculacion, SaV); and in November 1994 and March, April 1995 at a presumably less polluted one (Parana de las Palmas River, PP), in the lower delta of the Parana River (Argentina). Abundances at SaV ranged between 430 and 10,300 ind. m-2 being noticeably higher than those at PP, as well as those at 19 stations between and around these two locales. Shell lengths at SaV were monotonous throughout the 19-months period, over 90% of the clams varying between 16 and 22.5 mm in length; no discernible cohorts were recorded. At PP, on the other hand, juveniles below 5 mm were largely dominant, and shells above 25-30 mm in length were very common. Larvae retrieved from the gills of gravid clams showed much greater mortality rates in waters from SaV (up to 75 % after 120 hr), than in those from PP and in the control (approximately 10 % after 192 hr). The first internal growth-related mark in clams from SaV was closer to the umbo (mean: 14.2 mm), than that in clams from PP (mean: 24 mm). It is concluded that inadequate water quality at SaV is responsible for 100 % mortalities of newborns, for dwarfed adult clams, and for the lack of discernible cohorts.
author Boltovskoy, Demetrio
Correa, Nancy
Cataldo, Daniel Hugo
Stripeikis, Jorge Daniel
Tudino, Mabel Beatriz
author_facet Boltovskoy, Demetrio
Correa, Nancy
Cataldo, Daniel Hugo
Stripeikis, Jorge Daniel
Tudino, Mabel Beatriz
author_sort Boltovskoy, Demetrio
title Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
title_short Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
title_full Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
title_fullStr Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
title_full_unstemmed Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures
title_sort environmental stress on corbicula fluminea (bivalvia) in the parana river delta (argentina): complex pollution-related disruption of population structures
publishDate 1997
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00039136_v138_n4_p483_Boltovskoy
http://hdl.handle.net/20.500.12110/paper_00039136_v138_n4_p483_Boltovskoy
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