DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY

The aim of the present study was to experimentaly evaluate the capability of the freshwater mussel Diplodon chilensis as a potential depurator of residual waters in fish farming. With this purpose, the present study was carried out at the fish farm of the School of Aquaculture of the Catholic Univer...

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Autores principales:	Parada,Esperanza, Peredo,Santiago, Cárdenas,Silvia, Valdebenito,Iván, Peredo,Matías
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2008
Materias:	Hyriidae freshwater mussel Diplodon chilensis residual waters depuration rural salmonid fish-farms
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382008000100009
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spelling	oai:scielo:S0717-653820080001000092008-12-17DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDYParada,EsperanzaPeredo,SantiagoCárdenas,SilviaValdebenito,IvánPeredo,Matías Hyriidae freshwater mussel Diplodon chilensis residual waters depuration rural salmonid fish-farms The aim of the present study was to experimentaly evaluate the capability of the freshwater mussel Diplodon chilensis as a potential depurator of residual waters in fish farming. With this purpose, the present study was carried out at the fish farm of the School of Aquaculture of the Catholic University- Temuco, Chile (38º46'S; 72º38'W). The experimental design consisted of 12 poly vinyl chloride trays of 50x20x20cm corresponding to 3 treatments with 3 replicates each treatment and their respective controls. Each tray contained sterilized sand substratum and running water from a trout feeding tank. The treatments 1, 2, 3 contained 15, 30 and 60 mussels respectively, while the control trays contained no mussels. The growth tank contained 5,2k/m³ of Oncorhynchus mykiss. The trouts were fed daily with 37g of fish food during the time of the experiment duration. At time 0 the wet weight and length of each mussel was measured to determine the physiological state of the specimens through the Condition index. At the onset of the experiment it was determined the mortality and the Condition index of each individual. Also water samples from each tray corresponding to the 3 treatments, their respective replicates and controls were taken at time 0, 30 and 60 days to determine: total suspended solids, total dissolved solids, dissolved oxygen, total phosphorous, ammonium, nitrite, nitrate, conductivity, temperature, pH and chemical oxygen demand (COD). In a parallel way the percentage of organic matter and COD in the substratum of each of the treatment trays and their respective controls were determined. D. chilensis showed more efficiency in diminishing the concentrations of total suspended solids, total phosphorous, nitrite and the chemical oxygen demand. Values of the mentioned parameters decreased in direct relation to mussel density and time elapsed. Water COD data showed a high system efficiency percentage, corroborated by the substrate organic matter and substrate CDO data. These results, valid for an experimental scale show that D. chilensis is efficient in water depurator used on fish farming activities, suitable for rural fish farminginfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.72 n.1 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382008000100009en10.4067/S0717-65382008000100009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Hyriidae freshwater mussel Diplodon chilensis residual waters depuration rural salmonid fish-farms
spellingShingle	Hyriidae freshwater mussel Diplodon chilensis residual waters depuration rural salmonid fish-farms Parada,Esperanza Peredo,Santiago Cárdenas,Silvia Valdebenito,Iván Peredo,Matías DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
description	The aim of the present study was to experimentaly evaluate the capability of the freshwater mussel Diplodon chilensis as a potential depurator of residual waters in fish farming. With this purpose, the present study was carried out at the fish farm of the School of Aquaculture of the Catholic University- Temuco, Chile (38º46'S; 72º38'W). The experimental design consisted of 12 poly vinyl chloride trays of 50x20x20cm corresponding to 3 treatments with 3 replicates each treatment and their respective controls. Each tray contained sterilized sand substratum and running water from a trout feeding tank. The treatments 1, 2, 3 contained 15, 30 and 60 mussels respectively, while the control trays contained no mussels. The growth tank contained 5,2k/m³ of Oncorhynchus mykiss. The trouts were fed daily with 37g of fish food during the time of the experiment duration. At time 0 the wet weight and length of each mussel was measured to determine the physiological state of the specimens through the Condition index. At the onset of the experiment it was determined the mortality and the Condition index of each individual. Also water samples from each tray corresponding to the 3 treatments, their respective replicates and controls were taken at time 0, 30 and 60 days to determine: total suspended solids, total dissolved solids, dissolved oxygen, total phosphorous, ammonium, nitrite, nitrate, conductivity, temperature, pH and chemical oxygen demand (COD). In a parallel way the percentage of organic matter and COD in the substratum of each of the treatment trays and their respective controls were determined. D. chilensis showed more efficiency in diminishing the concentrations of total suspended solids, total phosphorous, nitrite and the chemical oxygen demand. Values of the mentioned parameters decreased in direct relation to mussel density and time elapsed. Water COD data showed a high system efficiency percentage, corroborated by the substrate organic matter and substrate CDO data. These results, valid for an experimental scale show that D. chilensis is efficient in water depurator used on fish farming activities, suitable for rural fish farming
author	Parada,Esperanza Peredo,Santiago Cárdenas,Silvia Valdebenito,Iván Peredo,Matías
author_facet	Parada,Esperanza Peredo,Santiago Cárdenas,Silvia Valdebenito,Iván Peredo,Matías
author_sort	Parada,Esperanza
title	DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
title_short	DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
title_full	DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
title_fullStr	DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
title_full_unstemmed	DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY
title_sort	diplodon chilensis gray, 1828 (bivalvia: hyriidae) a potential residual waters depurator on inland water salmonid fish-farms: a laboratory scale study
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382008000100009
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DIPLODON CHILENSIS gray, 1828 (BIVALVIA: HYRIIDAE) A POTENTIAL RESIDUAL WATERS DEPURATOR ON INLAND WATER SALMONID FISH-FARMS: A LABORATORY SCALE STUDY

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