UMT MOOC: Ornamental Fish Culture - Topic 7: Seed Production - Factors to be Considered for Feeding - Phytoplankton

Continue from previous post.

Feeding natural live feed to fishes is more economic and ecologic, especially from the growing stages from larvae, fry, and fingerling. Phytoplankton, which a derivation of Greek words of Pyhto (plants) and plankton (made to wander or drift), is a common name for a group of micro-organisms in both fresh and salty water is an essential food source in aquaculture. Besides cost savings, using Phytoplankto as live feed have several advantages such as: (1) Rich in pigmentation like Betta Carotene and Astaxanthin, (2) Probiotic medium which promotes growth and nutrition stability, and (3) Protection and shading which avoid disturbance and reduce light penetration.

There are two common Phytoplankton or microalgaes commonly hatched for aquaculture which are: (1) Chlorella sp. and (2) Spirulina sp.

(1) Chlorella sp. is one of the commonly found Phytoplankton in MY. The nutrient composition contains "45% protein, 20% fat, 20% carbohydrate, 5% fiber, and 10% minerals and vitamins", therefore, it is widely used as food source for larvae rearing.  Furthermore, it's easy to culture and maintain.

(2) Spirulina sp. besides as a food supplement for aquaculture, it's also a popular and rather expensive dietary supplement. The nutrient composition contains "5% water, 24% carbohydrates, 8% fat, and about 60% (51–71%) protein". The protein content is rather high compare to Chlorella sp.

Besides the above mentioned two, there are several other microalgaes used in aquaculture. The table (Source: Application of Microalgae in Aquaculture, Jyothi Kaparapu) below shows what and which microalgaes which were applied in aquaculture.

No comments:

Post a Comment