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Oxygen consumption of Litopenaeus vannamei juveniles in heterotrophic medium with zero water exchange PAB
Vinatea,Luis; Gálvez,Alfredo Olivera; Venero,Jesús; Leffler,John; Browdy,Craig.
This work aimed at determining the dissolved oxygen consumption rate of Litopenaeus vannamei juveniles maintained in a microbial biofloc raceway system at high density with no aeration. Three 4 L bottles were filled for each treatment, sealed hermetically, and placed in an enclosed greenhouse raceway system. Four shrimp (13.2±1.42 g) were assigned to two sets of the bottles, which underwent the following treatments: light conditions with no shrimp; dark conditions with no shrimp; light conditions with shrimp; and dark conditions with shrimp. Dissolved oxygen content was measured every 10 min for 30 min. A quadratic behavior was observed in dissolved oxygen concentration over time. Significant differences for oxigen consumption were observed only at 10 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litopenaeus vannamei; High density; Microbial biofloc; Oxygen consumption; Raceway system.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000500014
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Analysis of the marine shrimp culture production chain in Southern Brazil Anais da ABC (AABC)
Freitas,Rodrigo R.; Vinatea,Luis; A. Netto,Sérgio.
This study was elaborated to identify and describe the main links of the sea shrimp productive chain in the municipal district of Laguna, historically known as the main sea shrimp (Litopenaeus vannamei) production area in the State of Santa Catarina, Brazil. The study, held from April to July 2005, previously identified the local productive process through observation, interviews and bibliographical research. Afterwards, specific questionnaires were elaborated for each of the several segments connected to the local activity. A total of 90 interviews were conducted, intending to map out the procedures and functionality of the productive chain, from the necessary inputs for production to the moment of shrimp acquisition by final consumers. Results indicated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litopenaeus vannamei; Marine shrimp culture; Production risks; Supply chain.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000200015
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Treatment of shrimp effluent by sedimentation and oyster filtration using Crassostrea gigas and C. rhizophorae BABT
Ramos,Roberto; Vinatea,Luis; Seiffert,Walter; Beltrame,Elpídio; Silva,Júlia Santos; Costa,Rejane Helena Ribeiro da.
Efficiency in removing particulate matter from Litopenaeus vannamei shrimp culture effluent was assessed in laboratory scale employing sedimentation and oysters Crassostrea gigas and C. rhizophorae filtration processes. Cylindroconical tanks (100 L) were used in duplicate for sedimentation and 50-L in triplicate for oyster filtration. Fifteen oysters of each species weighing 76-80 g were stocked in each of the filtration treatment experimental units (biomass of 1065 - 1174 g oyster per unit). The control treatment was a tank similar to those used in the filtration treatment but with empty oyster shells. Hydraulic retention time of the effluent was of 6 hours in each treatment. First, effluent went through sedimentation, and then the supernatant went...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oysters; Filtration; Sedimentation; Effluent; Litopenaeus vannamei.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300030
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