Influence of light wavelength and intensity on the survival and somatic growth of the early larval stage of sutchi catfish Pangasianodon hypophthalmus
The present study examined the influence of various light wavelengths and intensities on the survival and somatic growth of sutchi catfish Pangasianodon hypophthalmus larvae during their most critical period. Two-day-old larvae (initial total length, TLi = 3 mm; initial body weight, BWi = 0.002 g)...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Journal of Aquatic Science
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/58228/ http://irep.iium.edu.my/58228/ http://irep.iium.edu.my/58228/1/Tan%20et%20al.%20%282017%292.pdf |
| Summary: | The present study examined the influence of various light wavelengths and intensities on the survival and somatic growth of sutchi
catfish Pangasianodon hypophthalmus larvae during their most critical period. Two-day-old larvae (initial total length, TLi = 3 mm; initial body
weight, BWi = 0.002 g) at a stocking density of 10 larvae per litre were reared in triplicate under five light wavelengths (white as a control,
blue, green, yellow and red wavelengths) of four light intensities (1.40×10-3, 1.40×10-2, 1.40×10-1 and 1.40 μmol/m²/s). The larvae showed a
tendency towards higher survival rates (SR) and production index (PI) under longer light wavelengths (yellow and red wavelengths) and at a
light intensity of 1.40×10-3 μmol/m²/s. Furthermore, the larvae reared under red wavelength showed a tendency towards higher specific
growth rates for both length and body weight (SGRL and SGRBW) than those reared under other light wavelengths. These findings provide
fundamental information regarding the optimum light conditions for larval rearing of sutchi catfish, as well as providing insight about the
adaptation of the larvae towards the environmental light in the wild. |
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