2 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Eelation of movements to tides. 

 Depth of water preferred by schools or single fish. 

 Temperature and general condition of water preferred. 

 Favorite localities in any region ; whether bottom be sandy, 

 rocky, muddy, grassy, &c. 



F. Relationships. 



To its own species ; whether gregarious, solitary, grouped by age 



or sex at any season, predaceous, &c. 

 To other animals ; whether preyed upon by them, feeding upon 



them, &c. 

 Special enemies, friends, or companions. 



G. Food. 



Nature. 



Mode of taking it. 

 Time of taking it. 

 Quantity consumed. 

 H. Reproduction. 



Interference with spawning by lines, nets, &c. 

 Age of male and of female, respectively, when capable of repro- 

 duction. 

 Change in physical condition, (color, shape, fatness, &c.) 

 Date of spawning and its duration, as relating to the individual 



as well as to the species. 

 Preferred localities for spawning, as to place, temperature, &c. 

 Special habits during spawning season. 

 Special habits before or after spawning. 

 Ratio of mortality in old fish from spawning. 

 Number of successive years of capacity for spawning. 

 Nesting places. 



Are nesting-places prepared 1 If so, whether of grass, stones, 

 sand, &c, or cleared areas, and whether made by one sex 

 only, or botb. 

 If ridges or furrows are formed, how made ? 

 The eggs. 



Mode of fecundation. 



Where laid. 



Where and how attached, if at all. 



Whether covered up, and how, or whether exposed in water. 



Number laid by one fish at one time, and the number during 



lifetime. 

 Size and color. 

 Special enemies. 

 Guarding of eggs by either sex. 

 The embryo and young fish. 



Time necessary for development. 

 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, &c, 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; whether pro- 

 tective, predatory, &c. 



