Early Weaning of Discus Symphysodon spp. Larvae: Histological and Morphological Observations


ÇELİK I., ÖNAL U. , CİRİK S. , DUMAN C., İNGİN T., ÇELİK P.

ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH, cilt.63, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 63
  • Basım Tarihi: 2011
  • Dergi Adı: ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH

Özet

To determine the optimal timing for weaning discus (Symphysodon spp.), larvae were fed a control diet of 100% Artemia, or weaned onto a micro-ground diet on day 18, 23, or 28 after hatching, until 45 days after hatching. During the first 14 days, the development of the digestive tract was studied to determine key events in the early ontogeny of discus larvae. There were significant (p<0.05) differences among treatments in the growth of the larvae. The highest weight increase was observed in the control group but good growth was also obtained when the larvae were weaned to dry feed 28 days after hatching. The specific growth rate (SGR) was 6.0 +/- 0.19 in the control group and 0.4 +/- 0.239, 2.0 +/- 0.257, and 5.2 +/- 0.382 in the 18, 23, and 28 day groups, respectively. Mean survival in all treatments was 56.25% with no significant differences among treatments.