388 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



5. A trap net shall not be set in water more than 60 feet deep. A trap net 

 under this ruling is the same as that defined under regulation no. 4. 



6. No more than two trap nets shall be placed in one string and an open space free 

 from netting of not less than 50 feet shall be left between the nets. 



7. In the event of a dispute between a trap-netter and a pound-netter concerning 

 the distance between nets, priority consideration shall be given the pound-netter if it is 

 established that he has fished for several years the grounds where his nets had been set. 

 Such consideration shall be given even though the trap-netter was the first to set his nets 

 on the disputed grounds at the beginning of the season. 



8. A trap net or a string of trap nets must be set approximately at a right angle to the 

 shore line or shoal or reef. 



9. Regulations 2, 4, 5, 6, and 8 have been recommended for trap nets on the assump- 

 tion that they will be observed by pound-Betters also. Enforcement is to be contingent 

 on the adherence of pound-netters to these regulations. 



APPENDIX D 



THE WHITEFISH FISHERY OF LAKES HURON AND MICHIGAN, 1940-1942 



Because of unavoidable delays in publication, statistics of the whitefish fishery have 

 become available for three additional years (1940, 1941, and 1942) since the prepara- 

 tion of the main body of this paper and appendices A, B, and C. The data for these 

 years are presented in this appendix. Discussion is brief and is concerned chiefly with the 

 demonstration that the new information substantiates the conclusions drawn previously. 

 Emphasis is placed on the detailed statistics for the State of Michigan waters although 

 production data are given for other areas. 



Table 52. — Production, of whitefish in pounds in the State of Michigan waters of Lake Huron, 19/(0-191$ 



1 Less than 0.5. 



