198 FISH CULTUEE. 



La Hulpe ; so that, although their transport Irom the 

 one to the other is expensive, yet it is made up for 

 by the increase of weight in the fish transported." 



These facts are both interesting and astonishing, 

 and are well worthy the attention of pisciculturists. 

 "We have no record of jack growing at such a rate 

 in this country, and I believe the case is rather 

 exceptional 



Eoach, save as food for the jack, are worse than 

 useless ia ponds, and should never be introduced 

 where there are carp, or they will in time exterminate 

 the carp : the roach increase so rapidly, and are so 

 much more active than the carp, that they will in 

 time literally starve the carp. I have noticed this 

 on more than one oecasion, I wUl, however, in- 

 stance one. In Brownwich Pond, near Titchfield, in 

 Hampshire (a pond formerly belonging to a monastic 

 institution), there weie, when I was a boy, a great 

 abundance of very fair sized earp ; there were also 

 a quantity of roach, running up to a quarter and 

 half a pound in weight : there were plenty of eels, 

 and a tolerable proportion of trout. Of the latter 

 I usually got from two to half a dozen in the course 

 of my day's fishing ; they rarely, however, exceeded 

 half a pound in weight. The carp did not run large, 

 owing, as I believe, to the numerous roach, four or 



