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Studies on the yolk absorption, mouth development and start of feeding of
Nile tilapia (Oreochromis niloticus)
Siti Najihah Binti Mustafa
Supervisor: Prof Dato Dr Anuar Bin Hassan
Bachelor of Science in Agrotechnology (Aquaculture)
School of Fisheries and Aquaculture Sciences
This study were carried out to determine the relationship between yolk absorption,
mouth development and also the relationship between the first feeding of larvae of
Nile tilapia. Six hundred eggs were incubated in 15 liter aquarium with 3 replication
and observation were done using the profile projector. The showed that the newly
hatched larvae had 4.173± 0.59 mm in total length and had yolk sac 9.07±0.89 mm
in volume. The yolk completely absorbed within 7 day 11 hours at the water
temperature of 26°C– 28 °C. All the larvae had started to feed the Artemia as their
food when the yolk were fully absorbed. Mouth started to open after 1 day of hatching
at the mouth size of 0.39±0.12 mm. For the start of feeding, the average of Artemia
of 16.7 individual/larval were found in the digestive tract. From this experiment, it
showed that there is a relationship between of yolk absorption and mouth
development to the first feeding of larvae.
534 | UMT UNDERGRADUATE RESEARCH DAY 2018