SEN: SAMPLING COMMERCIAL FISH LANDINGS 



KETCHEN, K. S. 



1950. Stratified subsampling for determining age determina- 

 tions. Trans. Am. Fish. Soc. 79:205-212. 

 Kimura, D. K. 



1977. Statistical assessment of the age-length key. J. Fish. 

 Res. Board Can. 34:317-324. 



KUTKUHN, J. H. 



1963. Estimating absolute age composition of California 



salmon landings. Calif. Dep. Fish Game, Fish. Bull. 120, 



47 p. 

 Mackett, D. J. 



1963. A method of sampling the Pacific albacore (Thunnus 



germo) catch for relative age composition. F.A.O. Fish. 



Rep. 3:1355-1366. 

 Ricker, W. E. 



1975. Computation and interpretation of biological statistics 



offish populations. Fish. Res. Board Can., Bull. 191, 382 p. 



Southward, G. M. 



1976. Sampling landings of halibut for age composition. Int. 

 Pac. Halibut Comm. Sci. Rep. 58:1-31. 



SUKHATME, P. V. 



1954. Sampling theory of surveys with applications. Iowa 

 State College Press, Ames, 491 p. 

 Tanaka, S. 



1953. Precision of age-determination of fish estimated by 

 double sampling method using the length for stratification. 

 Bull. Jpn. Soc. Sci. Fish. 19:657-670. 

 Tomlinson, P. K. 



1971. Some sampling problems in fishery work. Biometrics 

 27:631-641. 



WESTRHEIM, S. J., AND W. E. RlCKER. 



1978. Bias in using an age-length key to estimate age- 

 frequency distributions. J. Fish. Res. Board Can. 35:184- 

 189. 



421 



