FREE BOOKS

Author's List




PREV.   NEXT  
|<   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   >>  
asionally, however, trout hatch out head first, and in these cases the young fish generally dies before it can set itself free from the coverings of the ovum. Buckland observed that the alevins of the char very frequently hatch out head first, and consequently that many of them die before they can work themselves free from the eggs. If it were possible to have some one constantly watching the ova at the time that they are hatching out, it would be possible to save a very large proportion of them, as they may be very effectually helped out of the egg with a feather or soft camel's-hair brush; but this is, of course, quite impracticable, unless there is some one constantly watching the ova, as the delay of even a few minutes will mean the death of the fish. This peculiarity in the hatching out of the char has also been observed by Mr. J. J. Armistead, and I have been able to verify it personally. The mortality which occurs in the actual hatching out of the alevins does not, however, by any means end the trouble which the fish culturist has to encounter in the rearing of char. They require much more persuasion and care when they begin to feed and throughout the whole of the summer. The percentage of deaths is always greater than in the case of the trouts, not excluding the _fontinalis_, which is, as I have already explained, not really a trout but a char. Though there must be some doubt as to its success, I should like to see a really serious attempt at introducing char into some deep and large ponds in the south of England. Char have been very successfully reared in shallow water, which was certainly not kept at a particularly low temperature, so I see no reason why this fish should not do in some of our more southern waters. One drawback to the chance of this attempt being made, however, is that the char cannot be considered as being a fish which gives very good sport, and I very much doubt whether any one is likely to try the experiment simply to find out whether they would or would not succeed in the south of England. CHAPTER XII SALMON AND SEA-TROUT In many ways nature is apparently very wasteful, and in nothing is this more marked than in the case of the salmon. Probably not more than one egg in a thousand produces a fish which reaches the smolt stage, and a still smaller proportion grows to the spawning stage. This great mortality which occurs among the eggs and young fish when left to nature may
PREV.   NEXT  
|<   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   >>  



Top keywords:

hatching

 
England
 

nature

 
proportion
 

occurs

 

mortality

 
alevins
 

attempt

 

observed

 

constantly


watching

 
reason
 

success

 

southern

 

introducing

 

successfully

 

reared

 
shallow
 

temperature

 

apparently


spawning

 

wasteful

 

smaller

 

produces

 

reaches

 
thousand
 
marked
 

salmon

 
Probably
 

SALMON


considered
 

drawback

 

chance

 

CHAPTER

 
succeed
 

experiment

 

simply

 

waters

 
encounter
 

helped


feather

 
minutes
 

impracticable

 

effectually

 

coverings

 
Buckland
 

generally

 
frequently
 

summer

 

percentage