TRANSPORT OF FISHES 



79 



an arrangement such as shown in Figure 8 will assure 

 flushing of the air over the water siurface. 



Specifications: Constructed of either %" exterior grade 

 or marine plywood, all joints coated with waterproof 

 resorcinol glue and nailed with 2'' hrass boat nails. 

 All surfaces of tank given two coats of expoxy swim- 



., ming pool paint. Sealing flange % x %'^ white pine 

 with % X %!' sponge rubber gasket glued (3M adhe- 

 sive) to upper surface after wood is painted. Drain 

 consists of P/2^^ pipe flange mounted over a IW^ hole 

 in end of tank. Air vents /z" steel ells directed in op- 

 posite directions. 



8. Hauling tank designed for a pick-up truck. 



Ammonia 



Ammonia is a principal metabolic waste of fishes 

 as well as being produced as a result of a break-down 

 of feces and other organic waste. Ammonia is ex- 

 tremely toxic to fishes and probably can reach lethal 

 levels during extreme crowding over extended peri- 

 ods of time. To date there has not been much done on 



