Platts, William S., and Vance E. Penton. 



1980. A new freezing technique for sampling salmonid redds. 

 USDA For. Serv. Res. Pap. INT-248, 22 p. Intermt. For. 

 and Range Exp. Stn. , Ogden, Utah 84401. 



This report describes a new multiprobe freeze method for 

 determining salmonid redd sediment particle size distribution. 

 This method will collect salmonid eggs and alevins in the redd 

 at any stage of development, any air or water temperature, 

 any stream depth, and determine their horizontal and vertical 

 location. This method allows larger size samples to be 

 collected which can help improve understanding of embryo and 

 alevin survival rates and causes of their mortality. A com- 

 plete step by step description of the methodology is given 

 with a listing of parts, materials, and suppliers. 



KEYWORDS: Salmonid, salmon, sediments, freeze method, redd, 



channel, stream, carbon dioxide, freeze core- sampling. 



Platts, William S., and Vance E. Penton. 



1980. A new freezing technique for sampling salmonid redds. 

 USDA For. Serv. Res. Pap. INT-248, 22 p. Intermt. For. 

 and Range Exp. Stn., Ogden, Utah 84401. 



This report describes a new multiprobe freeze method for 

 determining salmonid redd sediment particle size distribution. 

 This method will collect salmonid eggs and alevins in the redd 

 at any stage of development, any air or water temperature, 

 any stream depth, and determine their horizontal and vertical 

 location. This method allows larger size samples to be 

 collected which can help improve understanding of embryo and 

 alevin survival rates and causes of their mortality. A com- 

 plete step by step description of the methodology is given 

 with a listing of parts, materials, and suppliers. 



KEYWORDS: Salmonid, salmon, sediments, freeze method, redd, 



channel, stream, carbon dioxide, freeze core sampling. 



