Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil
Length-weight equations were determined for the main microcrustacean species of Três Marias and Furnas reservoirs (state of Minas Gerais, Brazil), and evaluated the fluctuations of their biomass. We examined the following species: Thermocyclops minutus, Bosminopsis deitersi, Bosmina hagmanni, Ceriod...
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842013000300593&lng=en&tlng=en |
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| author | SL. Brito PM. Maia-Barbosa RM. Pinto-Coelho |
| author_facet | SL. Brito PM. Maia-Barbosa RM. Pinto-Coelho |
| author_sort | SL. Brito |
| collection | DOAJ |
| description | Length-weight equations were determined for the main microcrustacean species of Três Marias and Furnas reservoirs (state of Minas Gerais, Brazil), and evaluated the fluctuations of their biomass. We examined the following species: Thermocyclops minutus, Bosminopsis deitersi, Bosmina hagmanni, Ceriodaphnia cornuta, and Moina minuta (Três Marias Reservoir), and Notodiaptomus henseni, Daphnia ambigua, Ceriodaphnia silvestrii, Diaphanosoma spinulosum, D. fluviatile, and Bosmina freyi (Furnas Reservoir). Dry weight was obtained in a microbalance for each size class (Cladocera) or developmental stage (Copepoda). Microcrustacean mean biomass varied from 5.76 mg DW.m−3 and 20.36 mg DW.m−3 (Furnas Reservoir) and from 3.75 mg DW.m−3 and 18.14 mg DW.m−3 (Três Marias Reservoir). Significant differences (p < 0.000) between seasons were registered with higher biomass during the rainy seasons. Thermocyclops minutus was the most important species in Três Marias, whereas in Furnas, N. henseni contributed in equal proportion. In Furnas, the higher cladoceran biomass was explained by the contribution of larger-sized species, such as D. ambigua, C. silvestrii, D. spinulosum, and D. fluviatile. Even though both reservoirs are considered oligotrophic, there were significant differences in the estimated microcrustacean biomass, which reinforces the importance of this parameter for the description of the real contribution of each species in the community. |
| first_indexed | 2024-12-21T17:49:11Z |
| format | Article |
| id | doaj.art-ca07484acce344f2ae9cb8376d69b0d2 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-21T17:49:11Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-ca07484acce344f2ae9cb8376d69b0d22022-12-21T18:55:24ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437573359360410.1590/S1519-69842013000300017S1519-69842013000300593Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in BrazilSL. BritoPM. Maia-BarbosaRM. Pinto-CoelhoLength-weight equations were determined for the main microcrustacean species of Três Marias and Furnas reservoirs (state of Minas Gerais, Brazil), and evaluated the fluctuations of their biomass. We examined the following species: Thermocyclops minutus, Bosminopsis deitersi, Bosmina hagmanni, Ceriodaphnia cornuta, and Moina minuta (Três Marias Reservoir), and Notodiaptomus henseni, Daphnia ambigua, Ceriodaphnia silvestrii, Diaphanosoma spinulosum, D. fluviatile, and Bosmina freyi (Furnas Reservoir). Dry weight was obtained in a microbalance for each size class (Cladocera) or developmental stage (Copepoda). Microcrustacean mean biomass varied from 5.76 mg DW.m−3 and 20.36 mg DW.m−3 (Furnas Reservoir) and from 3.75 mg DW.m−3 and 18.14 mg DW.m−3 (Três Marias Reservoir). Significant differences (p < 0.000) between seasons were registered with higher biomass during the rainy seasons. Thermocyclops minutus was the most important species in Três Marias, whereas in Furnas, N. henseni contributed in equal proportion. In Furnas, the higher cladoceran biomass was explained by the contribution of larger-sized species, such as D. ambigua, C. silvestrii, D. spinulosum, and D. fluviatile. Even though both reservoirs are considered oligotrophic, there were significant differences in the estimated microcrustacean biomass, which reinforces the importance of this parameter for the description of the real contribution of each species in the community.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842013000300593&lng=en&tlng=enlength-weight relationshipsbody sizedry weightmicrocrustacean biomasstropical reservoirs |
| spellingShingle | SL. Brito PM. Maia-Barbosa RM. Pinto-Coelho Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil Brazilian Journal of Biology length-weight relationships body size dry weight microcrustacean biomass tropical reservoirs |
| title | Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil |
| title_full | Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil |
| title_fullStr | Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil |
| title_full_unstemmed | Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil |
| title_short | Length-weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in Brazil |
| title_sort | length weight relationships and biomass of the main microcrustacean species of two large tropical reservoirs in brazil |
| topic | length-weight relationships body size dry weight microcrustacean biomass tropical reservoirs |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842013000300593&lng=en&tlng=en |
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