POPULATION HETEROGENEITY IX PACIFIC PILCHARD 



225 



I'HII.I.II'S, .1. B. 



1948. Growth of the sardine, Sardinops caerulea, 

 1941-42 through 1946-47. California Div. Fish and 

 Game, Fish Bull. 71, pp. 5-33, 12 figs. 



RONQUILLO, INOCENCIO A. 



1949. Growth types of the Pacific pilchard. An anal- 

 ysis of samples of the Pacific pilchard cm the basis of 

 length-frequency distributions at different ages. 

 Thesis M. A., Stanford University. 



Roper, Kubt. 



1936. Ernahrung und Wachstum das Barsches (Perca 

 fluviatilis L.) in Gewassern Mecklenburgs und der 

 Mark Brandenburg. Zeitschrift fur Fischerei, Bd. 

 xxxiv, Heft (, pp. 568-636, 20 figs. 



Ruivo, Mario. 



1950. Sobre as populacoes e migracoes da sardinha 

 (Clitpea pilchardus Walb.) de costa Portuguesa. 

 Boletim da Sociedade Portuguesa de Ciencias Natu- 

 rais, Mil. iii. pp. 89—121, !l figs. 



RUNNSTR0M, SVEN. 



1936. A study on the life historj and migration of the 

 Norwegian spring-herring based mi the analysis of 



the winter ring- and summer zones of the scale 



Rept. Norwegian Fishery and Marine Invest., vol. .1. 

 Xo. 2, 103 pp., 13 figs., 3 pis. 

 Walford, I.. A. 



1946a. A new graphic method uf describing the growth 

 of animal-. Biol. Bull. 00, Xo. 2. pp. 1 II -1 17. 4 fig.-. 

 1946b. Correlation between fluctuations in abundance 

 of the Pacific sardine (Sardinops caerulea) and sa- 

 linity of the sea water. Sear- Foundation: Jour. 

 Mar. He-., vol. vi. No. 1. pp. 48-53, 1 tii;. 



WaLFORD, I.. A.. AND K. H. MOSHER. 



1941. Extension of pilchard spawning to North Pacific 

 waters indicated. Pacific Fisherman, Feb. 1941, p. 

 47. 



1943a. Studies mi the Pacific pilchard or sardine 

 (Sardinops caerulea). 2. Determination of the age 

 of juvenile- bj scales and otoliths. United States 

 Dept. interior, Fish and Wildlife Service, Spec. Sci. 

 Rept. No. 20, pp. 1-17. 32 figs. 



1943b. Ibid. -i. Determination uf age uf adults by 

 scales, and effect of environment cm first year's growth 

 a.- it heat- mi age determinations. United States 

 Dept. Interior, Fi.-h and Wildlife Service, Spec. Sci. 

 Rept. No. 21, pp. 1-20, ti figs. 



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