UMT MOOC: Ornamental Fish Culture - Topic 7: Seed Production - Factors to be Considered for Feeding - Artificial & Processed Feed

Continue from previous post.

While live feeds as we discussed in previous posts provides all the necessary nutrients for larviculture and aquaculture, culturing and obtaining consistent live feeds for fishes can be a time consuming and challenging. There are numerous issues that can interrupt the supply of live feed. Furthermore, different fish species have different nutrient requirement, feeding habits, and life stages. For that reason, artificial or processed live feed provides an good alternative food source. This type of feed is produced through bioencapsulation, a process that enhanced live feeds with specific nutrients (e.g. vitamin. fatty acids / fish oil, amino acids, colour, mineral, hormones, or enzymes) for specific type of fishes.

There are several popular processed live feeds which are made due to either costs, availability, and nutrients. Shrimp meal is rich in pigmentation and a popular choice as it's economically cheap and readily available. Frozen enriched Artemia or Brine Shrimp is suitable for long shelving food source which is also rich in Carotene (pigment development), laxative (digestive system). Spirulina, the greenish dry form plankton is rich in vitamin, Beta-carotene, and raw protein. On the other hand, our daily foods can serve as a good additional nutrients to existing fish meals. For examples, milk powder, egg yolk, egg custard, and soybean. The combination of both according to mixing ratios are shown below.

(1) Fish meal + cooked egg yolk (10/20:90/80)
(2) Soybean meal + cooked egg yolk (10/20:90/80)
(3) Fish meal + cooked egg yolk + fish oil (30:65:5)
(4) Fish meal + cooked egg yolk + plant oil (30:65:5)
(5) Fish meal + algae + fish oil (PUFA/HUFA) (85:10:5)
(6) Fish meal + algae + fish oil + pigment (80:7:10:3)
(7) Fish meal + algae + fish oil + digestive bacteria (80:8:10:2)

The video below shows the step-by-step of manufacturing floating type fish pellets (floating type) in a large scale manner.

No comments:

Post a Comment