FISHERY BULLETIN: VOL. 72, NO. 4 



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a. 



o 



UJ 

 OD 



3 



2- 



3- 



2- 



— 

 2 







4 

 2 







4 

 2 

 

 4 

 2 

 



4 



2 







4|- 



2- 







4 



2 







10 



15 



20 



STANDARD LENGTH ( 



Figure 15. — Composite monthly size frequenc 

 pelagic juveniles of Sebastolobus alascanus 

 trawls. 



MAY 



-I — I 



APR 



— ' — I 



MAR 



FEB 



JAN 



DEC 



NOV 



— ' — I 



OCT 



—I — I 



AUG 



JUL 

 30 



25 



mm) 



es for larvae and 

 from mid-water 



probable that settling begins as early as January. 

 Most have become benthic by May or June. The 

 pelagic juvenile stage in this species is short- 

 lived compared with S. altivelis and the total 

 period spent in the pelagic environment from 

 spawning to settling is about 14 or 15 mo. The 

 means of the composite monthly frequencies are 

 plotted in Figure 14. 



ACKNOWLEDGMENTS 



The illustrations of the larvae and juveniles 

 were prepared by George Mattson. Makoto Ki- 

 mura helped greatly in analyzing the length- 

 frequency data on trawl-caught specimens. John 

 Butler, William Lenarz, and Richard Rosenblatt 

 provided valuable advice and Elaine Sandknop 

 and Elizabeth Stevens furnished technical assis- 

 tance. I am especially indebted to Elbert Ahlstrom 

 for his help and encouragement throughout this 

 study. Lo-chai Chen of California State Univer- 



sity, San Diego, read the manuscript and offered 

 helpful suggestions. 



LITERATURE CITED 



Ahlstrom, E. H. 



1961. Distribution and relative abundance of rockfish 

 (Sebastodes spp.) larvae off California and Baja Califor- 

 nia. Rapp. P.-V. Reun. Cons. Perm. Int. Explor. Mer 

 150:169-176. 



Alverson, D. L., a. T. Pruter, and L. L. Ronholt. 



1964. A study of demersal fishes and fisheries of the north- 

 eastern Pacific Ocean. H. R. McMillan Lectures in 

 Fisheries, Inst. Fish., Univ. B. C, Vancouver, 190 p. 

 Barsukov, V. V. 



1964. Key to the fishes of the family Scorpaenidae. In P. A. 

 Moiseev (editor), Soviet fisheries investigations in the 

 northeast Pacific. Part 3, p. 226-262. (Translated from 

 Russ. by Israel Program Sci. Transl., 1968; available 

 U.S. Dep. Commer., Clearinghouse Fed. Sci. Tech. Inf., 

 Springfield, VA, as TT 67-51205.) 

 Best, E. A. 



1964. Spawning of longspine channel rockfish, Sebas- 

 tolobus altivelis Gilbert. Calif. Fish Game 50:265-267. 

 HUBBS, C. L. 



1926. The supposed intergradation of the two species of 

 Sebastolobus (a genus of scorpaenoid fishes) of western 

 America. Am. Mus. Novit. 216, 9 p. 

 Matsubara, K. 



1943. Studies on the scorpaenoid fishes of Japan. Part I. 

 Trans. Sigenkagaku Kenkyusyo 1, 170 p. 

 Miller, D. J., and R. N. Lea. 



1972. Guide to the coastal marine fishes of California. 

 Calif. Dep. Fish Game, Fish Bull. 157, 235 p. 

 Moser, H. G. 



1967. Reproduction and development of Sebastodes 

 paucispinis and comparison with other rockfishes off 

 southern California. Copeia 1967:773-797. 

 1972. Development and geographic distribution of the 

 rockfish, Sebastes macdonaldi (Eigenmann and Beeson, 

 1893), family Scorpaenidae, off southern California and 

 Baja California. Fish. Bull., U.S. 70:941-958. 

 Pearcy, W. G. 



1962. Egg masses and early developmental stages of the 

 scorpaenid fish, Sebastolobus. J. Fish. Res. Board Can. 

 19:1169-1173. 



Phillips, J. B. 



1957. A review of the rockfishes of California (family Scor- 

 paenidae). Calif. Dep. Fish Game, Fish Bull. 104, 158 p. 

 Starks, E. G. 



1898. The osteological characters of the genus Sebas- 

 tolobus. Proc. Calif. Acad. Sci., Ser. 3, Zool. 1:361-370. 



884 



