Morphological development and yolk sac utilization of coral trout, Plectropomus leopardus in prelarval stage

Ngu, King Fui (2010) Morphological development and yolk sac utilization of coral trout, Plectropomus leopardus in prelarval stage. Universiti Malaysia Sabah. (Unpublished)


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Coral trout, Plectropomus leopardus is a popular table fish which have high price in market, but the seeds production of coral trout still Inadequate especially in Malaysia.Larval rearing of coral trout is difficult due to mass mortality occur in larval stage. In order to understand more on the prelarval development process of coral trout, P.leopardus, a study was done In Universiti Malaysia Sabah hatchery. From this study, we able to understand the fundamental knowledge of prelarval morphological development of coral trout, P. leopardus. After spawning, floating and transparent eggs were transferred to one tonne tank and larval rearing were done In same tank. Observation was conducted using microscopes and measurement of prelarvae was done under profile projector. Total length for newly hatched prelarvae of P. leopardus was 1.5±0.06 mm. After 24 hours the prelarvae growth up to 2.40±0.07 mm in term of total length. At the end of the experiment which is 72 hAH, coral trout prelarvae growth up to 2.60±0.08 mm in term of total length. Yolk sac volume of newly hatched prelarvae was 0.199±0.150 mm3 which considered as 100% reduced to 24.07% after 24 hAH. Coral trout prelarvae completely absorbed yolk sac at 70 hAH. At the temperature 26.5-27.5°C, 50 hAH Is the suitable time to feed the prelarvae. Compared to others grouper species, coral trout prelarvae have short nutrition transition period which start from 60 hAH - 70 hAH. The mouth height of the coral trout prelarvae was 320 µm. Coral trout prelarvae have a small mouth and small type rotlfer needed to successfully rearing It

Item Type: Academic Exercise
Uncontrolled Keywords: Plectropomus leopardus, seeds production, coral trout, larval rearing, larval stage
Subjects: Q Science > QL Zoology
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email
Date Deposited: 02 Dec 2015 08:36
Last Modified: 27 Oct 2017 02:56

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