Malaysian Applied Biology Journal

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46_04_02

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Malays. Appl. Biol. (2017) 46(4): 7–13

AGGRESSIVE BEHAVIOUR OF AFRICAN CATFISH

Clarias gariepinus JUVENILES UNDER DIFFERENT LIGHT

INTENSITIES AND LIGHT WAVELENGTHS

MUHAMMAD FIRDAUS SALLEHUDIN1, NOR AMIRA YUSOFF1, NAI HAN TAN1, SHAHBUDIN SAAD2

and YUKINORI MUKAI2*

1Department of Biotechnology, Kulliyyah of Science, International Islamic University Malaysia,

Jalan Sultan Ahmad Shah, Bandar Indera Mahkota, 25200 Kuantan, Pahang

2Department of Marine Science, Kulliyyah of Science, International Islamic University Malaysia,

Jalan Sultan Ahmad Shah, Bandar Indera Mahkota, 25200 Kuantan, Pahang

*Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Accepted 14 September 2017, Published online 31 December 2017

 

ABSTRACT

The survival and growth rates of African catfish (Clarias gariepinus) were reported to be affected by light conditions. One of the methods to understand the effects of light conditions on fish survival and growth rates is through analysing the aggressive behaviour of the fish. The objective of the present study was to analyse the aggressive behaviours of African catfish juveniles under different light intensities and light wavelengths. For this purpose, the behaviour of African catfish juveniles (average body weight = 0.45 ± 0.19; average total length = 35.2 ± 5.0) was observed under three light intensities (0.0014, 0.014, and 1.40 ?moles/m²/s) and five light wavelengths (white, blue, green, yellow, and red). The results showed that the aggressive behaviour of the fish was significantly affected by light intensities and light wavelengths. Among the three light intensities, the juveniles showed less aggressive behaviour under 0.0014 ?moles/m²/s. Furthermore, the juveniles also showed less aggressive behaviour under the yellow light. Therefore, the rearing of African catfish juveniles under of 0.0014 ?moles/m²/s and yellow light wavelength is recommended.

Key words: African catfish, Clarias gariepinus, aggressive behaviour, light intensities, light wavelengths

 

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