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, the process of raising aquatic animals in ponds, is gaining more attention in recent times. The feeding system is an important aspect of aquacultural practice. A simple, relatively inexpensive automatic fish feeder was designed, constructed and evaluated. The operation of the feeder does not require highly technical expertise. This paper reports the design considerations, materials used and the effectiveness of the device, based on analysis of manual feeding and . The main features of the device are: hopper (stainless steel), bi-directional motor, feed platform and electrical control box. The design was based on specific parameters which included capacity of culture tank, stocking density, , diameter of the feed, angle of repose and bulk density (of the feed). The total cost of the device was 17,000 naira (approx. 106 U.S. dollars). The device was tested under two culture tanks (0.75 m3 each) with 10 kg-33 juvenile cat fish (Clarias gariepinus) placed in each tank with one feeding automatically and the other, manually. The feeder evaluation was based on feed conversion ratio (FCR) and feeding efficiency (FE).The total average gain in weight per fish was higher in the automatic feeding (89.50 g) than in manual (78.50 g). An FE of 20.9% was obtained in the automatic feeding and 18.6% in manual, in relation to their FCRs. A t-test, conducted at 5% significance level, indicated a significant difference in the two feeding methods.
The total average gain in weight per fish was higher in the automatic feeding (89.50 g) than in manual (78.50 g). An FE of 20.9% was obtained in the automatic feeding and 18.6% in manual, in relation to their FCRs. A t-test, conducted at 5% significance level, indicated a significant difference in the two feeding methods.
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So it sounds like you're not the only one with this problem. Sorry I can't be of more help; I've never used an automatic feeder, and my fear that it will go haywire and dump too much food is one reason. But then, I'm blessed with a very good neighbor who always follows my instructions to the letter! Not sure WHAT I'll do if she ever moves. How long are you going to be gone? Your fish will do fine for a few days with no food, Sarah--even as much as a week or more. No food while you're gone would be better than too much, that's for sure.I will be going on vacation overseas for 20 days and am planning to invest in a automatic fishfeeder. Right now I can afford a rotary fish feeder (like the Penn Plax or the nutramatic) which are rated to hold food for 4 weeks. Now here are my concern and it will be great if I can get some expert guidance from you: