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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estratégias de manejo para aclimatar o camarão marinho Litopenaeus vannamei (Boone,1931) à água doce

ALBUQUERQUE, Maria Luciene Luzia Tavares 01 March 2005 (has links)
Submitted by (edna.saturno@ufrpe.br) on 2017-02-16T13:41:53Z No. of bitstreams: 1 Maria Luciene Luzia Tavares Albuquerque.pdf: 748109 bytes, checksum: ed6d14d8d94e3639f3bb58a2eb31663a (MD5) / Made available in DSpace on 2017-02-16T13:41:53Z (GMT). No. of bitstreams: 1 Maria Luciene Luzia Tavares Albuquerque.pdf: 748109 bytes, checksum: ed6d14d8d94e3639f3bb58a2eb31663a (MD5) Previous issue date: 2005-03-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Experiments had been carried in the Laboratory of Shrimp culture of the Fishery Department of the Federal Rural University of Pernambuco (UFRPE), the purpose to acclimatize post larvae of the marine shrimp Litopenaeus vannamei to freshwater, during the period of 2003 at 2004. The experiments had been carried through in three phases, using post larvae with nine and ten days (PL9-10) and post larvae with twenty five and twenty six days (PL25-26) produced by commercial hatcheries. The acclimatization had been developed in aquariums with capacity of 44 liters each where the post larvae had stocked a density 11,3 PL/L, of with an acclimatization average time of of ten days.In first experiment had been tested concentrations lime, associates with the renewal rate daily of water of aquariums. In second experiment had been tested the concentration of lime and diets with two levels of artemia and artificial feed for shrimp. At the third experiment five diets with levels different of artemia, artificial feed for fish and artificial feed for shrimp had been tested. In the end of acclimatization in three experiments, post larvae had removed of the aquarium, counted, measured and weighted to calculate the survival, final weight, weight gain, final length and length gain. At first experiment the renewal rate of 50% daily of water de 50% were more efficient at post larvae parameter growth. In second experiment, diet D1 provided best survival than diet D2 (P < 0.05). While in third experiment, the survival rates were best to make useful artificial feed for fish. As conclusion, the water ofrenewal rate and diets had influenced significantly (P<0,05) on zootechnical data of these specie. / Experimentos foram realizados no Laboratório de Carcinicultura do Departamento de Pesca da Universidade Federal Rural de Pernambuco (UFRPE), objetivando aclimatar pós-larvas do camarão marinho Litopenaeus vannamei à água doce, durante o período de 2003 a 2004. Os experimentos foram realizados em três fases, utilizando-se pós-larvas com idade de nove e dez dias (PL9-10) e 25 e 26 dias (PL25-26), provenientes de larviculturas comerciais. A aclimatação foi realizada em aquários com capacidade de 44 litros cada, onde as pós-larvas foram estocadas na densidade de 11,36 pós-larvas/L com um tempo médio de aclimatação de dez dias. No primeiro experimento foram testadas concentrações de cal, associadas com a taxa de renovação diária da água dos aquários. No segundo experimento testaram-se concentrações de cal e dietas com dois níveis de concentração de artêmia e ração comercial para camarão. No terceiro experimento foram testadas cinco dietas com níveis diferentes de artêmia, ração para peixe e ração para camarão. No final da aclimatação de cada experimento, as pós-larvas foram retiradas dos aquários, contadas e realizadas biometrias, para estimar respectivamente a sobrevivência, o peso final, ganho de peso, comprimento final e ganho de comprimento. No primeiro experimento a taxa de 50% de renovação diária da água foi mais eficiente sobre os parâmetros de crescimentos das pós-larvas. No segundo experimento, a dieta D1 proporcionou melhores índices sobrevivência que a dieta D2 (P < 0,05). Enquanto no terceiro experimento, os índices de sobrevivências foram melhores ao utilizar-se a ração de peixe. Pode-se concluir que a taxa de renovação da água e a alimentaçãoinfluenciaram (P < 0,05) nos dados zootécnicos da espécie.

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