Full text
| |
| Author(s): |
Mônica Accaui Marcondes de Moura
Total Authors: 1
|
| Document type: | Master's Dissertation |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) |
| Defense date: | 1998-10-26 |
| Advisor: | Jose Eurico Possebon Cyrino |
| Abstract | |
The Amazonian Cichlidae peacock bass ((Cichla sp) is a sport fish with market value and quality flesh, therefor it is a suitable species for aquaculture. However, because of its piscivorous feeding preferences, the species does not accept dry feed voluntarily, turning its intensive culture difficult and costly. This study aimed to wean fingerling peacock bass from inert moist food to dry diets. In a first trial, 1.134 fingerlings weighting 0.27 ± 0.1 g were trained to accept ground fish flesh (GFF) with 31.8% success. Then 1.3-g fish were pooled and stocked into six 25L-cages and fed two sequences of pellets with 80, 60, 40, 20 and 0% GFF, one of that flavored with 10% of kriIl meal (Euphausia sp). A second trial was set up with 969, 1.7 ± 1.0-g fish which were trained to accept GFF with with 39.8% success. These 2.2-g fish were then trained to accept a moist diet containing 45% GFF (37.2% success). The trained fish were pooled and stocked into nine 25L-cages. Fish were weaned to a dry pellet without ground fish (GFF-00) using three sequences of diets: 1) dry pellets; 2) moist pellets; and 3) dry pellets flavored with 4% cod liver oil; all three diets containing 30, 10 and 0% GFF. In the first trial there was no differences between treatments. In the second trial, training success of the three sequences showed no beneficiaI effects of moisture or cod liver oil contents as palatability enhancers in the weaning diets to fish feeding on GFF-00 (P<0.05). This study revealed the feasibility of training peacock bass to accept dry pellets, but training young fish to feed on GFF seemed to remain the major bottleneck for improving the feed training success. (AU) | |