104 



THE FISH AND FROG 



this. Extra credit will be given for any additional observations 

 to show how the fish is fitted (adapted) to its surroundings. 



Make three columns on your paper. Select ten fishes of eco- 

 nomic importance. Place in the first column the name of each 

 fish, in the second its habitat (where found), in the third its use to 

 man. 



IMajwe of iP^xSlv 



HalDxt cct 



Use to I^ctrv 



Write a paragraph telling how these different fishes actively 

 protect themselves and two ways in which fishes are protected. 

 (By being like their surroundings is an example of the latter.) 

 Give the name of the fish, and its habitat in each case. 



Visit a hatchery and make careful notes telling, 



(1) The method of fertilization of the egg. 



(2) The kinds of eggs that are hatching. 



(3) The apparatus used in hatching different fish. (Make dia- 

 grams to illustrate.) 



(4) Methods of caring for young fish after they are hatched. 



(5) Any other observations on the process and its general use to 

 man. 



Conclusion. — Write up your trip in an interesting manner. 

 Illustrate it if possible, and hand it in to your instructor not later 

 than two daj^s after the trip. 



Problem 140: To determine some adaptations in a living 

 frog. 



Materials. — Live frogs, battery jars, charts. 



Observations. — How does the shape of the frog fit it for life in 

 the water? Note the color and markings. Feel the skin. In 

 what respect is it an adaptation ? 



Conclusion. — Remembering where a frog lives, write a para- 

 graph telling how the frog is fitted to its surroundings. 



