Zooplankton from shrimp culture ponds in Northeastern Brazil.
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Data
2009
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Resumo
Zooplankton was examined in 14 commercial shrimp Litopenaeus vannamei
ponds in tropical Brazil to assess their composition, determine their density, and
indicate environmental quality. In each farm, two ponds and the water intake
point were monitored in 2003. Sampling was made with a standard plankton net
50 micrometers mesh size. The zooplankton presented 40 taxa and was
essentially composed of typical marine euryhaline species and suspensionfeeding
forms. In all farms the dominant group was Copepoda with a total of
45%, followed by Protozoa (18%). The most abundant meroplankton were
Polychaeta larvae, Gastropoda larvae, nauplii of Cirripedia and zoeae of
Brachyura with large distribution in the region, sometimes dominating the
community. Zooplankton abundance varied from 972+209 ind m-3 to 4,235 +
2,877 ind m-3. In the studied marine shrimp culture ponds, copepods dominance
were replaced by protozoan and rotifers as nutrient concentrations increased with
the culture period, indicating that zooplankton trophic structure can be strongly
affected by the occurrence of eutrophic conditions in shrimp ponds. The
tendency of low species diversity is indicative of an unbalanced hypereuthrophic
system decreasing the water quality and the cultured species. These results can
be an important appointment to understand the effects of eutrophication in
coastal plankton structure and its effects to marine aquatic food web.
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Zooplankton, Aquaculture, Shrimp ponds, Litopenaeus vannamei
Citação
PORTO NETO, F. de F. et al. Zooplankton from shrimp culture ponds in Northeastern Brazil. WIT Transactions on Ecology and the Environment, v. 23, p. 234-244, 2009. Disponível em: <https://www.witpress.com/elibrary/wit-transactions-on-ecology-and-the-environment/122/20377>. Acesso em: 20 jul. 2017.