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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todo:paper_00039136_v138_n4_p483_Boltovskoy2023-10-03T13:56:42Z Environmental stress on Corbicula fluminea (Bivalvia) in the Parana River delta (Argentina): Complex pollution-related disruption of population structures Boltovskoy, D. Correa, N. Cataldo, D. Stripeikis, J. Tudino, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, D. Correa, N. Cataldo, D. Stripeikis, J. Tudino, M. 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. |
| format |
JOUR |
| author |
Boltovskoy, D. Correa, N. Cataldo, D. Stripeikis, J. Tudino, M. |
| author_facet |
Boltovskoy, D. Correa, N. Cataldo, D. Stripeikis, J. Tudino, M. |
| author_sort |
Boltovskoy, D. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_00039136_v138_n4_p483_Boltovskoy |
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1782030170612301824 |