on the bottom of the shipping container. Its neck, on which there is a stopper vdth a 

 fine opening, is automatically turned downward. Before laying the bottle in, a catalyser 

 perle is dropped into it, oxypen is produced and forces the hydrogen p«roxide through 

 the nozzle into the transport water. A fluid organic catalyser is poured into the trans- 

 port '.vater which should immediately deccnpose the emerging hydrogen peroxide. The fishes 

 will be seriously injured if errors occur in this respect, because according to Czensny, 

 white fishes (Coregonus) can endure only about 20 millicraras per liter of hydrogen per- 

 oxide. 



In the transportation without a supply of artificial oxygen, the stock strength of 

 the sliipping containers depends on extraordi:iarily manj' factors, especially r^turally on 

 the kind and size of fish (see Chapter I, B), the transportation duration, the delays on 

 the trip, and the temperature. All statements for the stock strength of shipping con- 

 tainers can therefore be only guide figures. The figures in Table 2L, which I have ccan- 

 piled from the statements of Meltzer (according to Dugor.-) in the Handbook for Fishermen 

 and Pond 'Janagers 1932 and from my oi-m experiences, must also be considered in tjiis 

 sense. The lower figures for the water requirement are standard for relatively lo'.v 

 temperatures and shorter transportations, the upper figures for opposite conditions, 

 7:it*h shald-ng barrels, a water filling up to about 80 to 90 percent is to be calculated. 



Table 21,. 



G\iide figures for the stock strength of various containers 

 for live shipment of fishes without a supply of artificial 



OX" -en for about 6 to 10 hour trans^ortation duration. 



Co = Carp-vitellin-sac brood, 



Cn = Carp-extended nursery brood. 



Ci - Carp-one summer. 



C2 = Carp-tY;o sunmer. 



C3 = Carp-three suitutier, 



R = iiainbow trout, 



S = Brook trout. 



T = Tench, 



187 



