Summary of conpcJhents of the metabolism of fish from the 

 viev.poij^ts of physiology and pond culture. 



Physiological classification 



Pond- cultural 

 classification 



General 



Lletabolism 



Basal Metabolism (catabolism) 



Anabolism 



Supplementary anabolism 

 Reproductive anabolism 

 Sedimentary anabolism 



Body 

 Sustenance 



Body growth 



The fishbreeder should know that basal metabolism as well as supplementary anabolism 

 operate for body sustenance. 



It is through basal metabolism that certain parts of the food are converted for the 

 performance of bodily functions, vrtiile through supplementary anabolism is cosapensated the 

 loss of used-up body material. The latter also provides for gland secretions, such as 

 loss of cutaneous mucus, gastric juices, etc. 



To reproductive and sedimentary anabolism is due bodily growthj weight increase from 



the fishbreeders viewpoint. 



Iteproductive anabolism expedites the growth proper of the body by increasing the 

 number of protein cells and other vital cells, capable of development. 



Through the function of sedimentary anabolism, bodily reserve materials, especially 

 fat and glycogen are deposited in certain well defined places (especially in the connective 

 tissues between muscle sections, between the abdominal organs and also under the skin and 

 in the liver). 



All metabolic functions — general as well as of the different con^onents — depend \xpan 

 certain factors which are — from their functional results — of highest importance to the 

 fishbreeder. 



Analogous to the metabolic functions in warm-blooded animals, the rate of metabolic 

 actions in fish is in ratio to the performed labor of locomotion, to organic activities 

 (conform to the doctrine of: "Heeds regulate rate") and to the measurements of the surface 

 of the body . 



Evidence for the existing relation between metabolic rate and performed labor will be 

 found in the increased consuii?)tion of oxygen after physical disturbances and agitated 

 swimming around (fish in transport, drainage of ponds, »rising"l in wintry ponds). Kirschstein 

 found that the consumption of oxygen in tench, for instance, right after transfer to a barrel 

 was three times as high as 15 to 20 minutes later. 



Another proof may be found in the fact that voracious feeders among fish require more 

 oxj/'gen than others, on account of their harder task of digestion. 



According to Lindstedt and Schaeperclaus (1925), the factor of surface measurements 

 applies to all fish, in fact to all water fauna, for that matter. 



