Avaliação do desempenho produtivo e rendimento de filé de três linhagens de tilápia (Oreochromis niloticus): Supreme, Chitralada e Bouaké

• Autor(a) principal: Poggere, Paulo Roberto
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UNIOESTE
• Texto Completo: http://tede.unioeste.br:8080/tede/handle/tede/1598
• topic: Desempenho; Filé; Crescimento; Tilápia; Linhagens; Performance; Fillet; Growth; Tilapia; Lineages; CIÊNCIAS AGRÁRIAS:RECURSOS PESQUEIROS E ENGENHARIA DE PESCA:AQUICULTURA:PISCICULTURA

The present study had as objective evaluates the performance, chemical composition, morphometrics reasons and yield of the fillet of three tilápia lineages: Supreme (SUP), Chitralada (CHIT) and Bouaké (BOU). The used experimental design was randomized entirely, composed by 3 treatments and 6 repetitions. 18 concrete tanks were used, where 30 fingerlings were stocked, with medium initial weight of 2,03 ± 0,25 g, 1,65 ± 0,06 g and 1,57 ± 0,11 g for SUP, CHIT and BOU respectively, totaling 540 fingerlings, being 180 fingerlings for each lineage. The fish were fed 3 times a day, with commercial diet of the type crumbed with 42% of CP for the alevinagem phase, and extruded with the levels of 36% CP for the growth phase and 32% CP for the fattening phase. The amount of diet was adjusted through the medium weight and temperature of the water. The biometry were accomplished biweekly, being captured 30% of the copies of each tank. The zootechnical indexes and the length data along the time were appraised through ANCOVA. The filet income was evaluated through ANOVA. Already the morphometrics reasons, were analyzed starting from MANOVA. For the zootechnical indexes, there were significant effects of the lineages on the Tax of Growth (TG), Earnings of Biomass (EB) and Final (FW) Weight. For TG and FW, CHIT differed significantly of the other ones, presenting largest TG and FW (2,543 g/day and 307 g), while SUP and BOU didn't differ significantly amongst themselves. In EB, CHIT and SUP they presented the best result (7.207,40 and 6.898,15 g, respectively), differing significantly of BOU. With relationship the morphometrics reasons, there was significant difference among the lineages. Already in the yield of the fillet without skin (YF), there were not significant effects among the lineages. The chemical composition of the fillet presented significant differences for ethereal (EE) extract and crude protein (CP) protein. For EE, the three lineages differed statistically amongst themselves, and BOU presented the largest value with 1,42%, following by SUP and CHIT. For CP, SUP (20,79%) and BOU (20,73%) they only differed of CHIT. For the growth in length, CHIT presented the largest value of L¥, with 27,39 cm, following by SUP (27,16 cm) and BOU (26,67 cm). Regarding the value of k (growth tax in length), SUP presented the largest value (0,4456), following by CHIT with 0,4349 and BOU (0,4141). In the growth in weight, CHIT obtained the largest value for W¥ with 534,15 g, following by SUP with 516,20 g and BOU 454,76 g. However, SUP was superior in the coefficient of growth alométrico (q) with 3,2442, being respectively the values of 3,2206 and 3,1773 for CHIT and BOU. It was verified that CHIT obtained the best results for TG, FW, EB and tenor of EE in the filet in comparison with SUP and BOU, besides presenting morphometrics reasons that provide a rounder format of his body being the lineage more adapted for cultivation in those imposed conditions and weight strip