Tlie embryo and young fish. 



Ratio of fish hatched to number of eggs laid. 



Proportion of young fish attaining maturity. 



Movement after birth : whether remaining on spawning 

 ground, and how long; or whether changing from 

 fresh to salt, or salt to fresh water, etc., and when. 



General appearance, and successive changes. 



Rate of growth. 



Special food. 



Enemies and diseases of eggs and young. 



Relation of parent fish, of either sex, to young : whe- 

 ther protective, predatory, etc. 



I. Diseases. 



K. Parasites. 



L Artificial fish-culture. 



jVI. Protection by law. 



N. Capture. 



Methods. 



By lines. 

 By nets. 



Floating, or raoval)le (seines, gill-nets, etc.). 

 Fixed (trajjs, pound.s, weirs, dams, etc.). 

 Other methods of capture. 

 Bait. 



Influence of modes of capture on al)uiidance. 

 Season of capture. 

 By lines. 

 By nets. 

 Otiierwise. 



