2007
DOI: 10.1590/s1519-69842007000200007
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Abstract: The present paper aims to describe the spatial distribution of zooplankton copepods, their biomass and instantaneous secondary production, in Barra Bonita, a large eutrophic, polymitic reservoir (22° 29' S and 48° 34' W) on the Tietê River, of the Paraná basin. Sampling was carried out during two seasons: dry winter and rainy summer. Species composition, age structure and numerical density of each copepod species population were analyzed at 25 sampling stations. Secondary production was calculated for Copepoda… Show more

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Cited by 35 publications
(25 citation statements)
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“…Relative numbers and biomass of Calanoids decreased and those of Cyclopoids increased at sites under more eutrophic conditions, thus resulting in lower values of Calanoida-Cyclopoida ratios. This pattern has been reported before for other Brazilian reservoirs (Tundisi 1988, Santos-Wisniewski & Rocha 2007, Sendacz et al 2006) and elsewhere for both, tropical, and subtropical water bodies (Pace 1986, Caramujo & Boavida 2000, namely that the presence of calanoid copepods relates to a low trophic level in the habitat, while cyclopoid copepods are favored in the more productive areas of higher trophic state. The higher proportion of calanoids in oligotrophic waters is due to the herbivorous-filter feeding habit of most species belonging to this group, especially in adulthood; and such feeding is based on nano-phytoplankton, which is replaced by micro-phytoplankton in environments of higher trophic state.…”
Section: Discussionsupporting
confidence: 84%
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“…Relative numbers and biomass of Calanoids decreased and those of Cyclopoids increased at sites under more eutrophic conditions, thus resulting in lower values of Calanoida-Cyclopoida ratios. This pattern has been reported before for other Brazilian reservoirs (Tundisi 1988, Santos-Wisniewski & Rocha 2007, Sendacz et al 2006) and elsewhere for both, tropical, and subtropical water bodies (Pace 1986, Caramujo & Boavida 2000, namely that the presence of calanoid copepods relates to a low trophic level in the habitat, while cyclopoid copepods are favored in the more productive areas of higher trophic state. The higher proportion of calanoids in oligotrophic waters is due to the herbivorous-filter feeding habit of most species belonging to this group, especially in adulthood; and such feeding is based on nano-phytoplankton, which is replaced by micro-phytoplankton in environments of higher trophic state.…”
Section: Discussionsupporting
confidence: 84%
“…In contrast, in the meso-eutrophic Guarapiranga Reservoir Sendacz et al (2006) reported that the Cyclopoida were the main contributors to the biomass in the reservoir during the dry period, a fact commonly observed in other eutrophic Brazilian reservoirs, like Barra Bonita, SP (Santos-Wisniewski & Rocha 2007).…”
Section: Discussionmentioning
confidence: 88%
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“…This agrees with our results where copepods were the dominant group in 8 out of the 13 Venezuelan reservoirs studied. This could be promoted by high water residence times that favor species with relatively long development cycles (Santos-Wisniewski & Rocha, 2007). The dominance by groups other than copepods in Venezuelan systems could be related to factors such as temperature, the quantity and quality of available food, species genotypes, climatic periods and differences in habitat conditions, among others (Gavidia, 2004;Sendacz et al, 2006;Mustapha, 2009;Merayo & González, 2010).…”
Section: Discussion and Final Considerationsmentioning
confidence: 99%
“…3). In general, calanoida (principally herbivorous-filter feeding habit of most species), occur mainly in more oligotrophic waterbodies, where there is a predominance of nanophytoplankton, whereas the cyclopoida occurs at higher abundance under more eutrophic status, owing to their ability to grip larger food particles and prey on smaller species of rotifera and cladocera (Pace, 1986;Santos-Wisniewski and Rocha, 2007).…”
Section: Emerged Station Occurrence Frequency (%) Emerged Station Occmentioning
confidence: 99%