Having a good nutritionally sound feed is only the first step toward having a good quality feed. Fish live below the water face. This means that, unlike terrestrial poultry, they also feed underwater. The fish feed thus differs from other feed for animal feeds.
Extrusion is the cooking of the nutrients and expanding of the pellet, allowing for a previous structure that will float. The floating feed allows for satisfaction feeding and proper observation of fish behavior. It’s important that pellets will stay complete after entering the water and not fall piecemeal and start filtering nutrients into the water.
What are the substances in the fish feed？
When choosing comprehensive feed formula, we should starts from the being raw accouterments, and develop new protein source, fat, and carbohydrate, which is suitable for fishes. On the basis of meeting the nutritive conditions, a comprehensive and fairly low-cost of feed should be prepared, to develop a good feed, it’s necessary to have a comprehensive understanding of the nutritive composition of the feed.
Fish feeds are generally high in protein and fat. thus, the shelf life of these feeds is limited. Expired fats and proteins can go rancid and poisonous, which can be dangerous to fish. To maintain good nutritive value and physical parcel feeds should be stored duly. Dark and temperature-controlled storage will prop in keeping feed fresh.
How to produce the fish feed
Feed formulation and manufacturing is an incredibly complex process that involves combining knowledge of nutritive conditions, feed component characteristics, feed product technology, and, importantly, natural information of farmed fish. All of these rudiments must be considered to produce feeds for fish. The pretensions of the specific monoculture product system for which the feed is intended mandate feed expression and manufacturing. Feeds for fish naiads or fingerlings are intended to support rapid-fire growth, health, and survival, whereas feeds for fish at the grow-out stage must be also designed to support growth and health, and they must support provident feed conversion rates.
Feeds represent over 50% of the operating cost of the fish products, so all of the rudiments of feed expression and manufacturing must be aimed at the advancement of perfect formulations while, at the same time, balancing practical considerations. Physical characteristics of feeds, similar to pellet shape, water stability, buoyancy, and continuity during running, also mandate feed formulation and manufacturing conditions
The feed has got a significant impact on the quality, safety, and nutritive value of farmed fish. The feed conditions of fish vary in volume and quality according to the feeding habits, physiological stages of the species, and environmental variations viz., temperature; quantum, and type of natural food vacuity in the culture system.
Three factors for choosing aquaculture fish feed
There are three factors to consider in the choice of feed ingredients for aquafeeds: (1) Quality – nutrient composition and presence of any anti-nutrients( substances that intrude directly with the immersion of nutrients or pollutants);(2) Quantity – quantum of availability; (3) Price of ingredients – Also, the other challenges of fish feed operation are feed formulation, feed processing, storage, handling, and transport.
• Feed formulation is the process of quantifying the quantities of feed constituents that need to be combined to form a single livery admixture diet) that supplies all of the nutrient needed by beast or allow to meet certain product objects at a reasonable cost( rather at the least cost)
• Typical formulations indicate the quantities of each component that should be included in the diet, and also give attention to nutrients( composition) in the diet
• Feed formulations are generally concessions between an ideal situation and practical considerations( cost, availability, and characteristics of constituents, etc.).