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| Ortiz M.,R.; Valdivia F.,A.; Martínez R.,J.; Martínez de A.,A.. |
| The objective of this study was to evaluate the effect of clenbuterol (CB), a beta2-adrenergic agonist, as a growth and weight gain promoter in broilers. Effects of CB were assessed, mixing it in feed at 0.0, 0.21, 0.42 and 0.84ppm, and feeding during four weeks to four groups (n=75) of 28 day-old Arbor Acres chickens. The body weight (BW) and food intake at 0, 12, 20 and 28 days of the study were recorded. Also abdominal fat (AF) and total muscle proteins were measured. Results indicate that from day 20 until the last of the experimental period (56-day-old), efficacy of CB was evident to increase growth and decrease AF deposition rates (P<0.01), in a dose-response pattern, suggesting that CB has a profitable growth promoting effect in broiler chickens. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chick; Clembuterol; Muscle protein; Weight gain; Abdominal fat; Food conversion. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352000000300015 |
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| Robb, F; Muir, D; Davis, C. |
| Some mechanisms of selection which operate on marine Vibrio and Pseudomonas strains during survival in dilute environments have been examined. Mannitol uptake and utilisation systems are more efficient in the Vibrio strain compared with the Pseudomonas strain during starvation survival. A Vibrio mutant strain lacking mannitol uptake showed no greater loss of viability during starvation survival than mannitol positive strains. The Vibrio strain appears to be constitutive with respect to mannitol uptake systems, whereas the Pseudomonas strain examined is inducible. Active uptake systems for glucose, glutamate, alanine and aspartic acid were efficiently maintained during starvation survival in the Vibrio strain. Results suggest that membrane uptake systems... |
| Tipo: Text |
Palavras-chave: Pseudomonas; Vibrio; Bacteria; Physiology; Alcohols; Food conversion; Survival; Starvation; Metabolism. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-960.pdf |
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| Mackinnon, M. |
| Lates calcarifer is distributed widely in northern Australia and is important to both commercial and recreational fisheries. There is the research on hatchery production of the species in 1984 and this work is continuing. Hatchery reared fish have been stocked to reservoirs in northern Queensland and have been used in experimental grow-out trials. Fish weaned onto formulated diets by the age of 25 days were reared to marketable size (> 500 g) in freshwater tanks. Despite suboptimal water temperatures the fish reached market size by the age of twelve months. Taste panel analysis showed that the pellet fed fish were of good quality. The sensitivity of growth rates to water temperature was demonstrated in both grow-out trials and reservoir stockings. |
| Tipo: Text |
Palavras-chave: Lates calcarifer; Pisces; Fresh water; Fingerlings; Hatcheries; Cage culture; Water temperature; Food conversion; Pellet feeds; Culture tanks; Diets; Growth. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/1989/acte-1429.pdf |
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