PROBLEMS OF FlSll AND FISHING 



29' 



If for any district in the United States or Canada the above 

 qtiestions can be answered in the airnmative, there remains 

 still one thino- for the class in civic bioloo^v to do. Writ*- 

 up the story to tell how the connnunity <lid il. It will prove 

 the most interestino- and instructive '' tish slniv** evt'i- wiiuen. 



Survey of district. The first step toward a sdhuioii of the 

 above problems is a sur- 

 vey of local waters. An 

 interested group, or com- 

 luittee, of tlu' class may 

 subdivide ilic district 

 amono- its mcmljcrs, each 

 of whom will Lj"o over his 

 part and make a map, to 

 scale, of lakes, streams, and 

 ponds, along with availaljjc 

 pond sites, springs, and 



flowing wells. Indicate 

 stream flow by arrows and 

 depths by col u our lines. 

 and ado[)t some uniform 

 method of showino- areas 

 of vesretation and kinds of 

 bottom — rockv, u,"ravellv, 

 sandy, or muddy. While 

 work in cr over the c'round 

 in this wav, observe and 

 record condition of water. 



Fk;. 1o8. Trial lisliiui; on iIr- Alhi(tiu!<.s 



Expeiimeutal catch of ('(hI an«l lialiliut taken 



ill twenty minutes by the Albafross while c.\- 



]>lorin;:; a new l»ank dIT the c«)ast <>f Alaska. 



United States Bureau of Fisheries 



I> it clear or uuuldy ? Do snun-es 

 of pollution exist? IIo\\' uiight these be remedied? (C'on- 

 sult state laws in this connection.) Kecord all lishes seen, 

 and gather records, from neighbors and local lishcinien and 

 markets, of the numbers and \alues of the different lisln^s 

 taken during the past season. 'I'his should result in a com- 

 plete list of tlie fishes of market value, with their iclative 



