What kinod tarpuline or lining do you suggest for the fish tanks? what is the type of tarpuline the orange color that can be see in your Fish tanks?? thanks
Hello bro I am a subscriber of your channel. Will you help me to know about how to make probiotic mixture (molasses +salt+lime+probiotic) for biofloc. Plz bro if you know about the biofloc plz help me.
MINCED EGG CAN BE AN EXCELLENT STARTER FEED FOR NEWLY HATCHED CATFISH ________________________________________ For the first 2-3 weeks after hatching, the catfish will not normally accept dry pelleted feed. During this period the fry are normally fed live feed. To provide an alternative food source, we minced hard-boiled chicken eggs in a blender. This "soup" was subsequently diluted and fed evenly to the fry tanks. The results showed that survival and growth rates were better than we had ever achieved. It should be noted that we used the whole egg, both egg yolk and egg white. The same technique was used for subsequent catfish batches, again with very positive results. This has led us to abandon the use of live feed for rearing catfish. The procedure used was as follows: For approximately 50,000 newly hatched catfish fry we fed 2 minced hard-boiled eggs 5 times per day, a total of 10 eggs per day. Two eggs and 1/2 liter of water were minced in a kitchen blender for 30 seconds at maximum speed. This "soup" was subsequently diluted and poured evenly into the fry tanks. The water exchange was stopped for 1 hour after each feeding. When the water was turned on again, the water exchange time in the tanks was approximately 2 hours. An air stone in each tank gives continuous aeration. By using the above technique, we normally achieve catfish survival rates of 70-80%. A glass beaker can be a good examination instrument. Observe some catfish fry 1/2 hour after feeding. If they have been eating properly, it is easy to see the enlarged white bellies of the fry. If the bellies are not enlarged and white, find out why. Maybe the mincing of the eggs is not thorough enough, so the egg white particles are too big for the fry to swallow. ________________________________________ Chapter 24. Microencapsulated Egg Diets for Fish Larvae 1/ 1/ This text was prepared after the Training Course 1. INTRODUCTION Egg is Unquestionably one of the most nutritionally balanced foods known for man and animals. Together with the facility with which it could be prepared and fed, and its general availability, egg was viewed with high expectations by early aquaculturists as a promising replacement for expensive live food such as Artemia in the feeding of very young fish. The ability of yolk and white to remain separate during cooking of unprocessed egg plus the fine granular texture of boiled egg yolk have indeed provided aquaculturists with a practical artificial diet that is superior to most other artificial feeds for this purpose. Egg yolk per se is highly nutritious - perhaps more so than egg white. However, as a diet for very young fish its high energy-protein ratio could result in inadequate intake of protein necessary for maximum growth. At the same time, there are seemingly difficult problems concerning the preparation and feeding of whole egg to fish. The ramifications of feeding egg to fish larvae will be explored in this chapter. Simple processing procedures for solving problems encountered in preparing a fish diet base on whole' egg will also be described. 2. WHOLE EGG versus EGG YOLK Fig. 1. Unhomogenized whole eggs in container. Shaded spheres denote yolks. Fig. 2. Homogenized whole eggs. Inset shows globules of egg yolk magnified. 3.2 Processing Techniques Micro-encapsulated whole egg feed may be made by any of the following three methods. Method A Step Procedure 1 Crack egg into heat resistant container. 2 Beat egg vigorously with fork or paddle; egg may also be homogenized with a mechanical blender. 3 Pour rapidly (approximately 150 cc for each egg) boiling water into homogenate, with constant stirring. A fine, opalescent suspension is obtained. 4 Make up to desired volume with cold water. A 50 g egg contains about 12 g dry matter. 5 Feed by the spoonful or scoopful directly to fish. The feed may also be applied as a spray using a 'knapsack' type sprayer. 6 Store unused feed in a tight container in a refrigerator. Method B Step Procedure 1 Same as Method A 2 Same as Method A 3 Pour homogenate directly into boiling water. Amount of stirring depends on feed particle size desired. Initially strands of cooked egg are formed. Dispersal of egg yolk remains the same. Yolk is still encased in denatured (cooked) albumin. 4 Same as Method A 5 Feed resuspended material directly to fish. Do not apply with sprayer as this will result in feed particles of undesirably small size for large-size fry. 6 Same as Method A Method C Step Procedure 1 Same as Method A 2 Add 50 cc water and proceed as in Method A. 3 Steam homogenate in same container or after transfer to appropriate dish or bowl. A custard made up of the solidified egg emulsion is formed. 4 Feed custard directly to fish after breaking up into desired size. 5 Store unused custard in tight container under refrigeration. 3.3 Advantages of the Novel Diets Whole egg contains all the necessary nutrients needed during the first ten days of life of most species of fish. The diet prepared by Method A described in Section 3.2 possesses all the previously listed characteristics desired in feed for very young fish: i.e., for wholesomeness, consistency, water stability, low BOD, long shelf life, and ease of preparation. The opalescent protein coat of the micro capsule reflects enough light to attract fish to it. This also enables close monitoring of the feeding, process leading to reduction in feed wastage and maintenance of water quality. The product from Method B is more suitable for larger fry and custard made with Method C is more suited to elvers which can be fed from a platform placed at the water surface. 3.4 Formulating Encapsulated Egg Diets Shelled egg is lacking in the water soluble vitamins, especially ascorbic acid. An egg-based diet fed to fry for an extended period should be supplemented with vitamins and perhaps also calcium during Step 2 of the preparative procedure of each method. Similarly, a product of lower protein content may be obtained by adding high carbohydrate ingredients such as wheat flour or cassava flour. These ingredients must be finely ground, however. The product from Method A can be freeze-dried, after removal of the water by centrifugation or filtration, to obtain an amorphous, dry, encapsulated feed.
