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Authors

  • Erlei Cassiano Keppeler Universidade Federal do Acre, Centro Multidisciplinar Colônia São Francisco, Gleba CEP 69980-000, Campus de Cruzeiro do Sul – AC, Brasil

DOI:

https://doi.org/10.5007/2175-7925.2008v21n4p65

Abstract

Correlation among water quality parameters of grow-out ponds of Macrobrachium amazonicum. Pond water quality is basic for the success of aquaculture, especially in ponds containing freshwater prawns. The variables considered most important are the dissolved oxygen and the ammonia-nitrogen. Twelve 0.01ha earthen ponds were stocked with 20 juveniles.m-2. Prawns were fed on commercial diet at a rate of 7 to 9% of biomass until the 14th week. After 145 days of stocking, all ponds were drained and harvested. The following
water parameters were determined weekly: temperature, dissolved oxygen, oxygen biochemical demand, pH, total alkalinity, electrical conductivity, nitrate-N, nitrite-N, ammonia-N, total nitrogen, soluble orthophosphate, total phosphate, chlorophyll a, chlorophyll b, chlorophyll c, pheophytin, total suspended solids and turbidity.
Water exchange and daily feeding affected water quality slightly. Correlations among water quality parameters were either weak or absent. The limnological variables analyzed showed that the highest correlations were between the dissolved oxygen and ammonia-nitrogen and between nitrite and turbidity.

Author Biography

Erlei Cassiano Keppeler, Universidade Federal do Acre, Centro Multidisciplinar Colônia São Francisco, Gleba CEP 69980-000, Campus de Cruzeiro do Sul – AC, Brasil

Possui graduação em Biologia pela Universidade Federal do Acre (1994), Mestrado em Ecologia e Manejo de Recursos Naturais pela Universidade Federal do Acre (1999) e Doutorado em Aqüicultura pela Universidade Estadual Paulista Júlio de Mesquita Filho (2005). Atualmente é professora adjunta da Universidade Federal do Acre, onde ministra as disciplinas Introdução à Limnologia e Aquicultura. Supervisiona bolsistas de iniciação científica, extensão e concludente de cursos. Quanto à Pós-Graduação, é credenciada no Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais da Universidade Federal do Acre. Atualmente, é membro da Comissão de Implantação do Instituto da Biodiversidade.Certificado pelo autor em 16/08/11

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Published

2011-09-05

Issue

Vol. 21 No. 4 (2008)

Section

Artigos

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