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| Azevedo,Rafael Vieira de; Fosse Filho,João Carlos; Cardoso,Leonardo Demier; Mattos,Douglas da Cruz; Vidal Júnior,Manuel Vazquez; Andrade,Dalcio Ricardo de. |
| This study aimed to evaluate economically the inclusion of prebiotics, probiotics and symbiotics in diets of Nile tilapia (4.07 ± 0.30 g), at two stocking densities (0.6 and 1.2 kg m-3). A total of 288 fish were distributed over 32 tanks (40 L) in a completely randomised design, in a 2 x 4 factorial (stocking density x additives), with four replications, over six weeks. The following were evaluated: total feed consumption (FC), final biomass (FB), relative gain in biomass (RGB), apparent feed conversion (AFC), survival rate (SUR), average cost of feed per kg of live weight gain (ACF), total cost of feed (TCF), total cost of production (TCP), gross income (GI), operating profit (OP) and economic efficiency index (EEI). No effect was seen the evaluated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus subtilis; Diets; Fish-feeding; Mannan oligosaccharides; Oreochromis niloticus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100072 |
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| Alanis,Jorge Gallardo; Sarma,S.S.S.; Nandini,S.. |
| Studies were carried out to quantify the functional response and prey selectivity of larval (1-5 weeks old) of Moenkhausia sanctaefilomenae, a widely cultured ornamental fish, using four rotifers (Brachionus calyciflorus, B. havanaensis, B. patulus and B. rubens) as prey. Regardless of larval age, B. havanaensis was not selected, while B. rubens and B. calyciflorus were preferred. B. patulus was selected only after three weeks. When fed B. calyciflorus, the larvae showed increased prey consumption with increasing age, but remained as plateau around 80 prey individuals. M. sanctaefilomenae consumed much lower individuals of both B. havanaensis and B. patulus, while B. rubens was consumed in higher numbers starting from the first week (about 35 ind. larva-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prey-predator interactions; Zooplankton; Fish-feeding; Brachionus. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500019 |
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