Size and dry weight of main zooplankton species in Bariri reservoir (SP, Brazil)

Abstract

In order to generate a database for secondary production studies in the São Paulo State (Brazil) reservoirs, the size and dry weight of 13 zooplankton species from Bariri reservoir (middle Tietê River) were determined. Diameter and dry weight of eggs from some cladoceran and copepod species were also determined.

Efeito das variáveis abióticas e do fitoplâncton sobre a comunidade zooplanctônica em um reservatório do Nordeste brasileiro

“…Com relação ao zooplâncton de reservatórios no Brasil, a maior parte dos trabalhos vêm sendo realizados em ecossistemas das regiões Sudeste, Sul e Centro-Oeste, tais como nos reservatórios da Pampulha em Minas Gerais, Monte Alegre e Jurumirim em São Paulo, Segredo no Paraná e Paranoá no Distrito Federal (CABIANCA & SENDACZ, 1985;MATSUMURA-TUNDISI et al, 1990;ARCIFA et al, 1998;GÜNTZEL & ROCHA, 1998;BRANCO & CAVALCANTI, 1999;LANDA & MOURGUÉS-SCHURTER, 1999;MATSUMURA-TUNDISI, 1999;PINTO-COELHO et al, 1999;NOGUEIRA, 2001;PANARELLI et al, 2001;CASANOVA & HENRY, 2004;PINTO-COELHO et al, 2005a,b;SANTOS-WISNIEWISK & ROCHA, 2007;GONZÁLEZ et al, 2008;ALMEIDA et al, 2009). Entretanto, na região Nordeste esses trabalhos podem ser considerados ainda escassos (BOZZELLI & HUSZAR, 2003).…”

Length-weight regressions of the microcrustacean species from a tropical floodplain

“…At higher temperatures, zooplankton experience a decrease in egg development time, combined with increases in population growth rate and food rate (Melão, 1999), which results in decreased body length. from tropical regions (Castilho-Noll and Arcifa, 2007;González et al, 2008;Brito, 2010) but significantly different to those from temperate regions (Dumont et al, 1975;Bottrell et al, 1976). This fact also is attributed to the greater lengths of copepod species in temperate regions.…”

“…In tropical regions, mainly Brazil, there are few studies that discuss length-weight regressions for microcrustaceans (Maia-Barbosa and Bozelli, 2005;Santos et al, 2006;Castilho-Noll and Arcifa, 2007) and biomass (Rocha and Tundisi, 1984;MatsumuraTundisi et al, 1989;Blettler and Bonecker, 2006;Melão and Rocha, 2006;Sendacz et al, 2006;Bonecker et al, 2007;González et al, 2008). Length-weight regressions based on the population parameters of species from temperate regions differ from those obtained in tropical regions, primarily in relation to zooplankton body size, which tends to be smaller in tropical regions (Saint-Jean and Bonou, 1994).…”

Zooplankton Abundance, Biomass and Trophic State in Some Venezuelan Reservoirs

“…Thus, the lack of association between the variables could be due to the dominance of zooplankton taxa with small sized species, which contribute little in terms of weight to the total zooplankton biomass. In contrast, copepods contribute more to total zooplankton biomass in many fresh water bodies due to their larger sizes and heavier dry weights (Infante, 1993;Infante et al, 1995;Castilho-Noll & Arcifa, 2007;González et al, 2008;Merayo & González, 2010). Sendacz et al (2006) affirm that rotifers tend to dominate zooplankton communities in tropical and sub-tropical lakes and reservoirs, independently of their trophic state, but due to their small size and light weight, often contribute little to total zooplankton biomass.…”