Table of Contents 



Page 



Chapter I. The general production-biological principles of pond-fish culture 1 



A. Introduction 1 



B . Metabolism of the pond fishes 1 



C . GroTTth of the pond fishes 5 



D. Nutrition of the pond fishes 10 



1. Types of food 10 



2. 'riie natural nutrition of the pond fishes 10 



General - carps - tenches - trout - pikes, perchpikes, dwarf 

 sheatfishes - crucian carps, whitefishes, sticklebacks, minnows. 



3. Artificial Food Supply 15 



U, Nutrition and Digestion , 15 



5. The components of foodstuffs, kind and amount required by 



pond fish 17 



General - the organic nutrients - crude fiber and other fillers - 

 water and mineral substances - supplementary substances (vitamines) - 

 form and general condition of the nutrition. 



E. Creative forces and conditions of life in the pond 27 



1. Catabolic cycle of the pond 27 



2. Aquatic animals in ponds 31 



General - wonns - rotifera - Crustacea - molluscs - dragonfly 

 larvae - Mayfly larvae - stone fly larvae - neuroptera larvae - 

 caddis fly larvae - diptera larvae - water bugs and water bug 

 larvae - beetles and beetle larvae - spiders and mites - the small 

 fauna in relation to environment, 



3 . The flora of the ponds , O. 



General - emergent water plants - floating plants - vmderv/ater 

 plants - growth plants - plankton plants - bacteria. 



it. The water l^ 



Principal requirements - the most important physical characteristics 

 of the water mass for pond-fish cultural purposes: depth, shore 

 characteristics, movement and its relation to light and heat econcmy - 

 most important chemical properties of the water - chemical water 

 analysis - oxj^en content - pH value - hydrochloric acid combining 

 power (lime and carbonic acid content) - iron and toxic substances, 



5. The bottom of the pond 58 



Chapter II. Construction of ponds 61 



Chapter III. Types and size of pond fisheries 69 



Chapter IV. Carp fisheries 71 



A. The carp. Market demands, types of scale formation, objects of rearing, 



carp races. Race and productivity culture by well planned selection ,. 71 



P-7i»09 



