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Same Feed (same + feed)
Selected AbstractsEvacuation of pelleted feed and the suitability of titanium(IV) oxide as a feed marker for gut kinetics in Nile tilapiaJOURNAL OF FISH BIOLOGY, Issue 5 2003H. Richter The present study assessed the suitability of titanium(IV) oxide, TiO2, as a digesta passage marker in Nile tilapia Oreochromis niloticus and studied the shape of the evacuation curve in this species. In three separate trials, fish were given one dose of either 0·5, 0·25 or 0·1% of their body mass (% BME) of feed marked with 1% TiO2 or 0·5% BME of the same feed without marker. The fish were serially slaughtered at intervals after feeding and the stomach contents analysed for dry mass and marker content. The data for individual trials were analysed with the linear, square root, surface area and exponential evacuation models and parameter comparisons showed that, although the marker interfered slightly with the evacuation process, true meal size could be predicted more accurately from the marker data. The results of an analysis of the combined data sets suggested that stomach evacuation in this species is dependent more on food particle surface area (surface area model) than on stomach content mass (exponential model) as is generally assumed. On the basis of these results, it was concluded that TiO2 at an inclusion level of 1% is an acceptable marker for quantifying evacuation with a view to predicting food consumption but should be used with caution in digestibility studies. [source] Preventive effect of hochu-ekki-to, a Japanese herbal medicine, on bleomycin-induced lung injury in miceRESPIROLOGY, Issue 6 2007Shunji TAJIMA Objective: Pulmonary fibrosis is thought to be closely associated with the T-helper type-2 (Th2) immune response. Recent studies have shown that hochu-ekki-to (TJ-41), a Japanese herbal medicine, may correct the Th1/Th2 imbalance skewed to Th2. The present study was designed to investigate the preventive effect of TJ-41 on the development of bleomycin (BLM)-induced lung injury in mice. Methods: Female C57BL/6 mice were divided into a group given ordinary feed and another group given the same feed plus TJ-41 mixed in at a dose of 1 g/kg/day. Both groups were maintained on this diet for 8 weeks before and 5 weeks after administration of 2 mg/kg BLM intratracheally. Results: Mortality after BLM-induced lung injury was significantly lower in the TJ-41-treated mice. The hydroxyproline content and fluid content in the lung on day 35 was significantly lower in the TJ-41-treated mice. Histologically, TJ-41 reduced the number of infiltrating cells, thus ameliorating the destruction of the lung architecture, and attenuated the lung fibrosis score. Furthermore, TJ-41 inhibited the expression of the interleukin-5/interferon-, mRNA ratio in the lung on day 7. Conclusions: Treatment with TJ-41 partially prevented experimental lung fibrosis through the correction of the Th1/Th2 imbalance skewed to Th2. [source] Influence of forage fish and dietary lipid supplements on egg quality and fry production in channel catfish (Ictalurus punctatus) × blue catfish (Ictalurus furcatus) hybridizationAQUACULTURE NUTRITION, Issue 2 2010E.R. DURLAND Abstract Hybrid catfish (channel catfish Ictalurus punctatus × blue catfish Ictalurus furcatus) display characteristics that are favourable to aquaculture production. Low hatch percentages are a principal reason this hybrid is not used widely in the catfish industry. This study was conducted to determine whether additional food source rich in lipids may lead to a higher quality egg production. A 10-week feed trial was conducted in ponds in Auburn, AL. A total of 219 female Kansas Select channel catfish were stocked into nine ponds, 0.04 ha in size. Three dietary treatments were randomly allocated to the ponds. Diet-1 was a standard 60 g kg,1 lipid floating catfish feed. Diet-2 was the same feed supplemented with forage fish at ,28 kg ha,1. The third diet was the aforementioned catfish feed topcoated with 20 g kg,1 lipid [10 g kg,1 menhaden fish oil, 5 g kg,1 high docosahexaenoic acid (DHA) oil and 5 g kg,1 high arachidonic acid oil]. Results indicate that brood fish fed the high lipid diet spawned larger egg masses and had larger eggs both in weight and in diameter, with increased complements of fatty acids such as DHA, eicosapentaenoic acid and total n-3 fatty acids. The neutral and polar lipid fractions are also presented. [source] Water immersion time reduces the preference of juvenile tropical spiny lobster Panulirus ornatus for pelleted dry feeds and fresh musselAQUACULTURE NUTRITION, Issue 6 2005K.C. WILLIAMS Abstract Development of a pelleted dry feed as an alternative to feeding fresh fishery by-catch is an environmental priority for tropical spiny lobster aquaculture. Earlier studies have shown the lobster's acceptance of pelleted dry feed diminishes rapidly after immersion in water. In this work, we quantified the rate at which dry matter, total protein, soluble protein and individual and total free amino acids were lost from pieces of green-lipped mussel Perna canaliculus, a commercially-extruded Penaeus japonicus (kuruma) shrimp feed (KSF) and four laboratory-made, fishmeal-based, pelleted feeds upon immersion for up to 7.5 h. The laboratory-made feeds contained homogenates of either green-lipped mussel, polychaete (Marphysa sanguinea), prawn (Metapenaeus bennettae) or squid (Sepioteuthis spp.). After being immersed in water for 0, 2.5 or 5 h, these same feeds were offered as a paired choice with KSF in two preference feeding studies with juvenile Panulirus ornatus lobsters. The loobster's preference for fresh mussel always exceeded that of KSF, irrespective of immersion time. Regression of the proportional intake of test feeds against the relative leach rate of KSF identified soluble protein, glycine and taurine as the principal leachate components having the highest positive correlations with the lobster's feeding preference. [source] | ||||||||||