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Effect of bio-organic fertilizer and agro-industrial residue on the growth and reproduction of
cyclopoid copepod, Oithona rigida (Giesbrecht, 1896)

1
1 Wan Yuslan Wan Amirah, Wan Rasdi Nurul Nadiah*

1 Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030 Kuala Terengganu,
Terengganu, Malaysia.

* Corresponding author: nadiah.rasdi@umt.edu.my

Abstract:

Production of live feed for larval development of aquatic species is crucial in the aquaculture industry. The
cultivation of cyclopoid copepod, Oithona rigida can enhance the growth performance and nutritional
quality of fish and crustacean larvae. Hence this study was conducted to evaluate the different dietary
regimes containing swiftlet waste, soybean meal, rice bran and microalgae (Nannochloropsis sp.) on the
growth, productivity and nutritional content of O. rigida. The feeds in powder form were weighed and
dissolved in distilled water to get suspensions of 500 ppm = 500 mg/L. The enrichment concentration of
the alga diets used was 500 ppm = 500 mg/L, equivalent to 2 x 107 algal cells/mL. The results showed that
rice bran (66.83±2.25% protein and 21.98±1.41% lipid) and Nannochloropsis sp. (72.08±2.02% protein
and 21.98±1.41% lipid) additives produced the best outcomes in terms of specific growth rate (0.109±0.002
-1
and 0.104±0.001 day ) of O. rigida respectively. Rice bran (28.16%) and Nannochloropsis sp. (31.35%)
as dietary additives also improved the polyunsaturated fatty acids (PUFAs) content of O. rigida. The use
of rice bran as food additives for O. rigida has shown a comparable result with the Nannochloropsis sp., in
terms of the growth, survival, reproduction and dietary value. Thus, rice bran and Nannochloropsis sp. was
marked as the best feeding regime for the cyclopoid copepod, O. rigida as potential characteristics for mass
culture in aquaculture hatcheries.

Keywords: Copepod enrichment, Dietary composition fatty acids, Live feed