Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil
Lake Paranoá is an eutrophic reservoir situated in the urban region of Brasília. This study was carried out in a fixed collection station located in the Riacho Fundo branch of the reservoir. Zooplankton samples were collected at intervals of 3-5 d at 9:00 a.m. during two months in the dry and rainy...
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Universidad de Costa Rica
2002
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/16161 |
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RBT161612022-05-25T21:46:24Z Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil Padovesi-Fonseca, Claudia de Mendonça-Galvão, Luciana Pereira Rocha, Diogo Libânio thermocyclops decipiens temporal fluctuation reproduction lake paranoa brazil El lago Paranoá es una reserva eutrófica situada en la región urbana de Brasilia. Este estudio se llevó a cabo en una estación de recolecta fija localizada in la rama Riacho Fundo de la reserva. Se recolectaron muestras de zooplancton a intervalos de 3-5 d a las 9:00 a.m. durante dos meses en las estaciones seca y lluviosa por dos años (seca- 1996, lluviosa-1997, secca-1997 y lluviosa-1998), usando una red de plancton de 64 μm de poro. La especie más predominante fue Thermocyclops decipiens (cerca del 50% del total de la comunidad de zooplancton), la cual durante todo el período tuvo una tasa reproductiva alta. Las densidades más altas fueron encontradas en la estación seca- 1996 (1700 ind/l para las nauplio), y también fluctuó ampliamente en el tiempo. Los estadios de nauplio dominaron durante cuatro períodos, comprendiendo 50-75% de la densidad de la población total. Las hembras ovígeras tuvieron picos en las estaciones seca-1996 y luviosa-1997, con 20-30% del total de hembras. El pico más grande en producción de huevos fue durante la estación seca-1996, y la producción total de huevos fue de 2.0x103 huevos/l. Mesocyclops longisetus es un primer registro para Paranoá. Los factores ecológicos que determinan el éxito de T. decipiens en sistemas eutróficos están relacionados con los hábitos de alimentación omnívoros y las interaciones presa- depredador Lake Paranoá is an eutrophic reservoir situated in the urban region of Brasília. This study was carried out in a fixed collection station located in the Riacho Fundo branch of the reservoir. Zooplankton samples were collected at intervals of 3-5 d at 9:00 a.m. during two months in the dry and rainy seasons for two years (dry- 1996, rainy-1997, dry-1997 and rainy-1998), using a 64 μm-mesh plankton net. The most predominant species was Thermocyclops decipiens (about 50% of the total zooplankton community), which during the whole period had a high reproductive rate. The highest densities were found in the dry-1996 season (1700 ind/l for nauplii), and also fluctuated widely overtime. Nauplii stages dominated during the four periods, comprising 50-75% of the total population density. Ovigerous females peaked in the dry-1996 and rainy-1997 seasons, with 20-30% of the total females. The largest peak in egg production occurred during the dry-1996 season, and the total egg production was 2.0x103 eggs/l. Mesocyclops longisetus is a first record for Lake Paranoá. The ecological factors that determine the success of T. decipiens in eutrophic systems are related to omnivorous feeding habits and prey-predator interactions. Universidad de Costa Rica 2002-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/16161 Revista de Biología Tropical; Vol. 50 No. 1 (2002): Volume 50 - Regular number 1 - March 2002; 57–68 Revista de Biología Tropical; Vol. 50 Núm. 1 (2002): Volumen 50 - Número regular 1 - Marzo 2002; 57–68 Revista Biología Tropical; Vol. 50 N.º 1 (2002): Volume 50 - Regular number 1 - March 2002; 57–68 2215-2075 0034-7744 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/16161/15625 Copyright (c) 2002 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
spa |
| format |
Online |
| author |
Padovesi-Fonseca, Claudia de Mendonça-Galvão, Luciana Pereira Rocha, Diogo Libânio |
| spellingShingle |
Padovesi-Fonseca, Claudia de Mendonça-Galvão, Luciana Pereira Rocha, Diogo Libânio Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| author_facet |
Padovesi-Fonseca, Claudia de Mendonça-Galvão, Luciana Pereira Rocha, Diogo Libânio |
| author_sort |
Padovesi-Fonseca, Claudia |
| description |
Lake Paranoá is an eutrophic reservoir situated in the urban region of Brasília. This study was carried out in a fixed collection station located in the Riacho Fundo branch of the reservoir. Zooplankton samples were collected at intervals of 3-5 d at 9:00 a.m. during two months in the dry and rainy seasons for two years (dry- 1996, rainy-1997, dry-1997 and rainy-1998), using a 64 μm-mesh plankton net. The most predominant species was Thermocyclops decipiens (about 50% of the total zooplankton community), which during the whole period had a high reproductive rate. The highest densities were found in the dry-1996 season (1700 ind/l for nauplii), and also fluctuated widely overtime. Nauplii stages dominated during the four periods, comprising 50-75% of the total population density. Ovigerous females peaked in the dry-1996 and rainy-1997 seasons, with 20-30% of the total females. The largest peak in egg production occurred during the dry-1996 season, and the total egg production was 2.0x103 eggs/l. Mesocyclops longisetus is a first record for Lake Paranoá. The ecological factors that determine the success of T. decipiens in eutrophic systems are related to omnivorous feeding habits and prey-predator interactions. |
| title |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| title_short |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| title_full |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| title_fullStr |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| title_full_unstemmed |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| title_sort |
temporal fluctuation and reproduction of thermocyclops decipiens (copepoda, cyclopoida) in an eutrophic lake of central brazil |
| title_alt |
Temporal fluctuation and reproduction of Thermocyclops decipiens (Copepoda, Cyclopoida) in an eutrophic lake of central Brazil |
| publisher |
Universidad de Costa Rica |
| publishDate |
2002 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/16161 |
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