Avaliação da relação entre as atividades de engorda e pesque-pague e as características limnológicas destes ambientes aquáticos
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Data
2013-06-03
Autores
Bonazzi, Bruna [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como objetivo comparar o comportamento limnológico no período de doze meses dos viveiros de piscicultura de engorda e pesque-pague em um estabele-cimento de pesque-pague localizado no município de Corumbataí. As saídas de campo foram realizadas mensalmente em um período de doze meses no período matutino. Quatro viveiros de pesque-pague e quatro viveiros de engorda foram analisados, nos quais os seguintes parâmetros foram medidos: oxigênio dissolvido, temperatura, pH, condutividade, turbidez. Além destes, a água foi coletada e armazenada em frascos plásticos para serem analisadas em laboratório: fósforo total e nitrogênio total Kjeldahl. Foram aplicados Analises de Componentes Principais (PCA) e ANOVA fatorial para os escores obtidos com a PCA. Pôde ser observada características discriminantes entre os viveiros de engorda e pesque-pague através da PCA, assim como a existência de diferença significativa (p<0,05) entre os períodos de verão e inverno e entre os viveiros de pesque-pague e engorda. Conclui-se que o diferente manejo empregado aos vivei-ros de engorda e pesque-pague nos períodos de verão e inverno principalmente com o fornecimento de ração tornam os viveiros de engorda ambientes mais eutrofizados, especialmente no verão
This work had the objective to compare the limnological characteristics in the period of twelve months of grow-out ponds and fee-fishing pond in a fee-fishing site in Corumabataí city. The site visits were scheduled for twelve months in the morning peri-od. Four fee-fishing ponds were analyzed and four grow-out pond, where the following parameters were measured: dissolved oxygen, temperature, pH, conductivity and tur-bidity. Besides those, the water was collected and kept in plastic bottles to be analyzed in laboratory: total phosphor and total nitrogen Kjeldahl. Principal Components Analyz-es (PCA) were applied and factorial ANOVA for scores obtained with PCA. Could be observed discriminate characteristics between the grow-out and fee-fishing ponds through the PCA, as well as a significant difference (p<5) between summer and winter time and between fee- fishing pond and fatting pond. It was concluded that the different handling employed on the grow-out and fee fishing ponds during summer and winter periods especially with the supply of fish feed turned the grow-out ponds more eu-trophic, especially in summer
This work had the objective to compare the limnological characteristics in the period of twelve months of grow-out ponds and fee-fishing pond in a fee-fishing site in Corumabataí city. The site visits were scheduled for twelve months in the morning peri-od. Four fee-fishing ponds were analyzed and four grow-out pond, where the following parameters were measured: dissolved oxygen, temperature, pH, conductivity and tur-bidity. Besides those, the water was collected and kept in plastic bottles to be analyzed in laboratory: total phosphor and total nitrogen Kjeldahl. Principal Components Analyz-es (PCA) were applied and factorial ANOVA for scores obtained with PCA. Could be observed discriminate characteristics between the grow-out and fee-fishing ponds through the PCA, as well as a significant difference (p<5) between summer and winter time and between fee- fishing pond and fatting pond. It was concluded that the different handling employed on the grow-out and fee fishing ponds during summer and winter periods especially with the supply of fish feed turned the grow-out ponds more eu-trophic, especially in summer
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Palavras-chave
Limnologia, Aquicultura, Peixe - Alimentação, Limnology
Como citar
BONAZZI, Bruna. Avaliação da relação entre as atividades de engorda e pesque-pague e as características limnológicas destes ambientes aquáticos. 2013. xi,79 p. Dissertação (mestrado) - Universidade Estadual Paulista, Centro de Aquicultura, 2013.