EFFECT OF LIVE FOOD ON SURVIVAL RATE AND GROWTH PERFORMANCE OF GIL THEAD SEABREAM Sparus aurata LARVAE. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 4, Volume 29, Issue 8, August 2004, Page 4447-4459 PDF (3.74 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2004.239408 | ||||
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| Author | ||||
| M. A. Zaki, | ||||
| Animal and Fish Prod. Dept., Fac. of Agric., Alex. Univ., Alex., Egypt. | ||||
| Abstract | ||||
| This experiment was carried out in order to study the effect of rotifers, Brachionus plicatilis, and encapsulated Artemia naup/ii as a live food on survival rate and growth performance of gilthead sea bream, Sparus aurata, larvae. Gilthead sea bream larvae (20 days old) with 7.3 ± 0.20 mm/pce body length and 5.4 + 0.10 mg/pce body weight were stocked in eight white fiberglass tanks (each of 1 m:r volume) at a density of 1 ,200-larvae! tank. Four treatments were tested as following, 1) low rotifers and low Artemia (LRLA); 2) high rotifers and low Artemia (HRLA); 3) low rotifers and high Artemia (LRHA); and 4) high rotifers and high Artemia (HRHA) for 24 days. Low and high rotifers were 5 and 25 (pcs/ml), respectively. Low and high Artemia were (50, 100, and 200 pcs/ml) and (250, 500, and1000 pcs/ml), during the periods 1§1-8J.!:L, 9Jh- 16Jh_ and 17.!b. -24.!b. days of feeding, respectively. The results showed that survival rates of , S. aurata, larvae significantly (P~ 0.05) improved with the application of the experimental program by feeding mixture of high levels of rotifers and Artemia. Feeding a mixture of higher levels of rotifers and Artemia increased survival rate (48.96 %), however, the lower levels of both resulted in lower survival rate (12.17) % of , S. aurata larvae. Other intermediate treatments of HRLA or LRHA resulted in improvements in survival rates (19.08 and 32.21) % respectively) of .S. aurata ,larvae. Growth performances of, S.aurata, larvae (gain in length and weight; average daily gain in length and weight; and specific growth rate, SGR %) were significantly (P .::. 0.05) increased with increasing the levels of live food from both rotifers and Artemia .The, results clearly showed the superiority of the higher levels of live Artemia in enhancing the growth performances criteria of, S. aurata, larvae than rotifers. Finally it could be recommended a suitable live food program containing a mixture of rotifers and Artemia to improve the survival rates of, S. aurata, and larvae. | ||||
| Keywords | ||||
| Rotifers; Artemia; gilthead sea bream; survival | ||||
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