Please use this identifier to cite or link to this item: http://dspace.unipampa.edu.br:8080/jspui/handle/riu/1486
metadata.dc.type: Trabalho de Conclusão de Curso
Title: Desempenho de juvenis de tilápia do nilo (Oreochromis niloticus) e pacu (Piaractus mesopotamicus) em sistema de recirculação de água
metadata.dc.creator: Rodrigues, Andressa Tellechea
metadata.dc.contributor.advisor1: Fernandes, João Batista Kochenborger
metadata.dc.description.resumo: O objetivo deste estudo foi avaliar o desempenho de juvenis de tilápia do Nilo (Oreochromis niloticus) e pacu (Piaractus mesopotamicus) cultivados em sistema de recirculação de água. Foram distribuídos 300 juvenis de pacu (6,49 ± 0,03 g) e 300 juvenis de tilápia (6,47 ± 0,02 g) em um delineamento inteiramente ao acaso com dois tratamentos e dez repetições em densidade de estocagem de 30 peixes/ unidade experimental. Foi utilizado um sistema de circulação de água com filtros mecânico e biológico e vinte unidades experimentais, as quais eram compostas por tanques de alvenaria revestidos com volume útil de 1500 litros, dotados de sistemas individuais de aeração, abastecimento e escoamento de água com renovação de 4 L/min e temperatura controlada por meio de trocador de calor. Os animais foram alimentados três vezes ao dia até a saciedade aparente com dietas experimentais contendo 23,10% de proteína digestível e 2931,28 Kcal/kg de energia digestível para juvenis de pacu e 26,89% proteína digestível e 3118,31Kcal/kg de energia digestível para juvenis de tilápia do Nilo. Os parâmetros físico-químicos da água foram aferidos ao longo do experimento, tais como pH, oxigênio dissolvido, amônia total, nitrito e nitrato a cada dois dias, com exceção da temperatura que foi diariamente. Conclui-se que os parâmetros físico-químicos médios da água não afetaram o desenvolvimento dos indivíduos e estiveram dentro do intervalo de conforto para ambas espécies. Tanto em 40 quanto em 70 dias, juvenis de tilápia cultivados em sistema de recirculação apresentaram melhores taxas de crescimento específico, conversão alimentar aparente, peso médio, ganho em peso, fator de condição e consumo diário de ração quando comparados com juvenis de pacu. Sistemas de recirculação de água podem apresentar-se como alternativa para produção de juvenis de tilápia e pacu.
Abstract: Growth performance was evaluated in juveline tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus) cultivated in recirculating water system. Pacu (6,49 ± 0,03 g) and tilapia juvelines (6,47 ± 0,02 g) were distributed in a completely randomized design with two treatments and ten replicates in a stocking density of 30 fish/ experimental unit. It was utilized a circulating water system with mechanical and biological filters and twenty experimental units, which were composed of lined masonry tanks with storage volume up to 1500 litre individual aeration system, water supply and disposal with renovation of 4L/min. The animals were fed three times a day until apparent satiety with experimental diets of 23,10% of digestible protein and 2931,28 Kcal/kg of digestible energy for pacu juveniles and 26,89% of digestible protein and3118,31Kcal/kg of digestible energy for juveniles Nile tilapia. The water physicochemical parameters were measured throughout the trial, such as pH, dissolved oxygen, total ammonia, nitrite and nitrate every two days, except for temperature, which was mesured daily. It is concluded that the average water physicochemical parameters have not affected the individuals performance and which were within the specified comfort interval for both species. Both in 40 than 70 days, Nile tilapia juveniles cultivated in recirculating system posts the best specified growth rates, feed conversion ratio, average weight, weight gain, condition factor and feed daily intake when compared to pacu juveniles. Recirculating aquaculture systems can be presented as an alternative for the production of tilapia and pacu juveniles.
Growth performance was evaluated in juveline tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus) cultivated in recirculating water system. Pacu (6,49 ± 0,03 g) and tilapia juvelines (6,47 ± 0,02 g) were distributed in a completely randomized design with two treatments and ten replicates in a stocking density of 30 fish/ experimental unit. It was utilized a circulating water system with mechanical and biological filters and twenty experimental units, which were composed of lined masonry tanks with storage volume up to 1500 litre individual aeration system, water supply and disposal with renovation of 4L/min. The animals were fed three times a day until apparent satiety with experimental diets of 23,10% of digestible protein and 2931,28 Kcal/kg of digestible energy for pacu juveniles and 26,89% of digestible protein and3118,31Kcal/kg of digestible energy for juveniles Nile tilapia. The water physicochemical parameters were measured throughout the trial, such as pH, dissolved oxygen, total ammonia, nitrite and nitrate every two days, except for temperature, which was mesured daily. It is concluded that the average water physicochemical parameters have not affected the individuals performance and which were within the specified comfort interval for both species. Both in 40 than 70 days, Nile tilapia juveniles cultivated in recirculating system posts the best specified growth rates, feed conversion ratio, average weight, weight gain, condition factor and feed daily intake when compared to pacu juveniles. Recirculating aquaculture systems can be presented as an alternative for the production of tilapia and pacu juveniles.
Keywords: Reuso de água
Water quality
Water reuse
Aquaculture
metadata.dc.subject.cnpq: CNPQ::CIENCIAS AGRARIAS
Publisher: Universidade Federal do Pampa
metadata.dc.publisher.initials: UNIPAMPA
metadata.dc.publisher.department: Campus Uruguaiana
metadata.dc.rights: Attribution-NonCommercial-NoDerivs 3.0 Brazil
metadata.dc.rights.uri: http://creativecommons.org/licenses/by-nc-nd/3.0/br/
URI: http://hdl.handle.net/riu/1486
Issue Date: 13-Dec-2016
Appears in Collections:Aquicultura

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