OPTIMIZATION OF Artemia sp UTILIZATION IN Betta splendens LARVICULTURE: ENRICHMENT, LARVA STOCKING DENSITY AND FEEDING FREQUENCY

OPTIMIZATION OF Artemia sp UTILIZATION IN Betta splendens LARVICULTURE: ENRICHMENT, LARVA STOCKING DENSITY AND FEEDING FREQUENCY

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dc.contributor.author	GHRAMAH, ABDULLAH SALEM FARAG
dc.date.accessioned	2015-12-29T03:11:43Z
dc.date.available	2015-12-29T03:11:43Z
dc.date.issued	2009-06
dc.description.abstract	In this study, two feeding experiments were conducted. For experiment (1), three days-old Betta splendens larvae (mean weight 6.00 ± 0.001 mg) were fed four different feeding treatments [newly hatched Artemia (NA), Spirulina platensis enrichment Artemia (SPA), newly hatched Artemia + Spirulina platensis enrichment Artemia (NA+SPA) and 19 hours post hatched Artemia (19PHA)] for 55 days, to examine the effect of these feeding on larvae growth. The result showed that, these feeding treatments did not significantly influence (p>0.05) the final weight gain (mg), percentage of weight gain, specific growth rate and survival rate. The carotenoid content of larvae fed with SPA was significantly higher (28.92 ± 0.52 J.1g/g) than the other three treatments. The C20:4n-6 content (1.30 ± 0.10 %) in larvae fed with 19PHA was the highest among others. Larvae fed SPA had significantly lower C20:5n-3 compared to that fed NA and 19PHA. C22:6n-1content and total PUFA in larvae fed with NA and NA+SPA was significantly lower (p<0.05) compared to the other two treatments. Total n-3 PDF A for the larvae fed SPA or NA+SPA was significantly lower than larvae fed 19PHA (23.22 ± 0.50 %). n-3/n-6 ratio in larvae fed 19PHA was significantly higher (1.84 ± 0.08 %) compared to other treatments. For the second experiment, the effect of different feeding frequency on the growth of larvae stocked at different densities was observed by feeding newly hatched Artemia to the larvae. The results showed that, feeding frequency had significant effects on larvae final weight and specific growth rate, but had no significant effects on weight gain, survival rate and total length. Larvae stocking densities had significant ~ffect (p<O.05) on larvae final weight, weight gain, specific growth rate and total len~h, while had no effect (p>0.05) on larvae survival rate. The results also showed that, no significantly difference (p>0.05) between the 2 larvae feeding frequencies. The mean of larvae stocking densities 20 / tank which were fed twice and thrice per day was significantly higher (p<0.05) on larvae final weight, weight gain and total length than the mean of larvae stocking densities at 30 and 40/tank. Feeding frequency and stocking density affected C20:4n-6, C22:5n-3 and total n-3/n-6 ratio of the larvae, but they did not have any effect (p>O.05) on total saturates and total n-6 PDF A. This study demonstrated that larvae which were fed SPA or 19PHA in the first experiment and larvae stocked density at 20 / tank in the second experiment when fed NA twice and thrice daily gave better growth and high survival rate for Betta splendens larviculture.	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/1357
dc.subject	OPTIMIZATION	en_US
dc.subject	UTILIZATION	en_US
dc.title	OPTIMIZATION OF Artemia sp UTILIZATION IN Betta splendens LARVICULTURE: ENRICHMENT, LARVA STOCKING DENSITY AND FEEDING FREQUENCY	en_US
dc.type	Thesis	en_US

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