Theilacker and Porter. Condition of Theragra chalcogramma in the Gulf of Alaska 



341 



Walleye pollock preserved in 95% ethanol and mea- 

 sured in water showed a slight increase in size, be- 

 tween 1 and 3%. Values in the literature for ethanol 

 shrinkage vary greatly from 0% (Theilacker, 1980) 

 to 14% (Radtke and Waiwood, 1980), possibly because 

 of concentration differences or because fish are of- 



ten transferred from ethanol into water for measure- 

 ment. The transfer permits rehydration which usu- 

 ally negates the original shrinkage. 4 



4 Theilacker, G. H. U.S. Dep. Commer., NOAA, Natl. Mar. Fish. 

 Serv., Alaska Fisheries Science Center, 7600 Sand Point Way 

 NE, Seattle, Wa 98115. Unpubl. data. 



