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Rocha, J. G. , Analysis of the reproductive parameters and the effect of the levels of calcium and phosphorus in the feeding of tracaja (podocnemis unifilis) and amazonic turtle (podocnemis expansa) in captivity. Unpublished paper presented at 6th World Congress of Herpetology. 
Added by: Admin (21 Nov 2009 12:00:04 UTC)
Resource type: Conference Paper
BibTeX citation key: Rocha2008
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Categories: General
Keywords: Ernährung = nutrition, Fortpflanzung = reproduction, Habitat = habitat, Haltung = husbandry, Podocnemididae, Podocnemis, Podocnemis expansa, Podocnemis unifilis, Schildkröten = turtles + tortoises, Südamerika = Southern America
Creators: Rocha
Collection: 6th World Congress of Herpetology
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Abstract     
The commercial farming of chelonians contributes for conservation.In the traditional systems of culture, the necessity exists to analyze the reproductive parameters and the effect of the levels of calcium and phosphorus in the feeding and performance of Podocnemis unifilis and P. expansa. This work was carried through in three chelonians farmings next to Manaus, from August of 2007 to May of 2008. The animals had been measured and marked. From August to September, was made the search and marking of the nests, protected with screen. It was registered the amount of eggs, species that it disposed and was maked the biometry of eggs. In October and November, it had eclosion, where the infertile eggs, pregiving had been counted and it was done the biometry of fingerlings after the absorption of vitelo. For the nutrition experiment, it had been used 189 fingerlings of P.expansa and 216 of of P.unifilis becoming of the eclosion of farmings and from Vila Nova/Parintins/AM. These animals had been lodged in river steamers with nine compartments of 0,1m ³ each. The density was of 15 fingerlings (8 P. unifilis and 7 P. expansa) in each compartment. The experiment was in factorial 3X3, with 3 calcium levels (1.0; 2.0 and 2.5%) and 3 levels of phosphorus (0,5; 1,0 and 1.5%), with three repetitions, in randomized blocks design. It was supplied ration with 29% of protein and 4000 kcal/kg of energy, 2% of the biomass. The properties had between 241 to 500 females of P. expansa with sexual reason varying of 12♀: 1♂ 9,5♀: 1♂, having on average 51,4±6,9 cm of length of carapace and 16,9±5,8 kg of weight, registered 6 nests of P. expansa with 60,5±4,95 eggs with 19,8±7,08 g. It had 7.20% of rotten eggs and 92.70% of pregiven eggs. Eggs with 16,4±1,67 g, the eclosion had been registered 11 P. unifilis nests of with 26,43±8,81 were of 20 fingerlings. It had 3.10% of infertile eggs 25.52% of rotten eggs and 64.50% of pregiven eggs. The fingerlings had been born with 35,5±2,12 mm of length of carapace and with 10,8±1,02 g of weight. Difference was not found significant enters at the offered levels of Ca and P. The daily weight gain varied of 0,173g/day to 2,479g/day. The alimentary conversion in the treatments varied of 1,75 to 2,03:1.
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