FISHERY BULLETIN: VOL. 85, NO. 1 



sampling program, and the resulting analysis pro- 

 vides only a basic outline of these species' popula- 

 tion genetic structure. More extensive sampling 

 would no doubt reveal more variations on the pat- 

 terns identified here. It is likely that such variations 

 would be significantly affected by differences be- 

 tween species in location and timing of spawning. 

 At present, there are neither sufficient inshore 

 hydrographic data nor extensive life history infor- 

 mation over the geographic range of most of these 

 species to allow more specific predictions concern- 

 ing the dynamics of larval drift. Our understanding 

 of the process of larval transport in shallow-water 

 marine organisms can thus be enhanced by more 

 comprehensive sampling programs, involving both 

 genetic and life history analyses. 



Nevertheless, it is significant that no major differ- 

 ences in patterns of genetic differentiation could be 

 attributed to dispersal capability per se. Thus of the 

 five "core" species with the most strongly correlated 

 sets of rankings, E. jacksoni is a livebearer; Clino- 

 cottus analis spawns intertidally and has a brief lar- 

 val life; P. clathratus and Chromis punctipinnis 

 have high fecundity and a lengthy larval life; and 

 M. californiensis has pelagic juveniles, commonly 

 occurs far offshore with drifting kelp, and thus has 

 the highest dispersal capability of all. This result 

 suggests that the multispecies approach used here 

 may provide information of general use for study- 

 ing the population biology of other marine organ- 

 isms (fishes and invertebrates) with pelagic larvae. 



ACKNOWLEDGMENTS 



We would like to thank all those who helped with 

 collections of the nearly 2,000 specimens used in this 

 study. We are also very grateful to H. Geoffrey 

 Moser and Gary Brewer for providing us access to 

 unpublished records of larvae captured by CalCOFI 

 and ICHS, respectively. We thank an anonymous 

 referee for a number of constructive suggestions. 

 Funds for this research were provided in part by 

 grants from the Marine Life Research Group and 

 the Chancellor's Associates, University of Califor- 

 nia, San Diego. Robert S. Waples was supported by 

 an NSF Graduate Fellowship during a portion of this 

 research. 



LITERATURE CITED 



Briggs, J. C. 



1974. Marine zoogeography. McGraw Hill, N.Y. 

 Brinton, E. 



1981 . Euphausid distributions in the California Current dur- 



ing the warm winter-spring of 1977-78, in the context of a 

 1949-1966 time series. CalCOFI Rep. 22:135-54. 

 COWEN, R. K. 



1985. Large scale pattern of recruitment by the labrid, Semi- 

 cossyphus pulcher: causes and implications. J. Mar. Res. 

 43:719-742. 



Dawson, E. Y. 



1945. Marine algae associated with upwelling along the north- 

 western coast of Baja California, Mexico. Bull. South. Calif. 

 Acad. Sci. 44:57-71. 



Haldorson, L. 



1980. Genetic isolation of channel islands fish populations: 

 evidence from two embiotocid species. In D. M. Power 

 (editor), The California Islands: Proceedings of a Multi- 

 disciplinary Symposium, p. 433-42. Santa Barbara Mus. 

 Nat. Hist., Santa Barbara, CA. 



HiCKEY, B. M. 



1979. The California Current System - hypotheses and facts. 

 Prog. Oceanogr. 8:191-279. 

 HUBBS, C. L. 



1948. Changes in the fish fauna of western North America 

 correlated with changes in ocean temperature. J. Mar. Res. 

 7:459-82. 



1960. The marine invertebrates of the outer coast. Syst. 

 Zool. 9:134-47. 



HUBBS, C. L., AND L. P. SCHULTZ. 



1929. The northward occurrence of southern forms along the 

 Pacific Coast in 1926. Calif. Fish Game 15:234-40. 

 Kramer, D., and P. E. Smith. 



1973. Seasonal and geographic characteristics of fishery 

 resources. IX. Inshore sportfishes. Mar. Fish Rev. 35(5-6): 

 15-18. 



Moser, H. G., B. Y. Sumida, D. A. Ambrose, E. M. Sandknop, 

 and E. G. Stevens. 



1986. Development and distribution of larvae and pelagic 

 juveniles of ocean whitefish, Caulolatilus princeps, in the 

 CalCOFI survey region. CalCOFI Rep. 27:162-169. 



Nei, M. 



1972. Genetic distance between populations. Am. Nat. 106: 

 283-292. 

 Radovich, J. 



1961. Relationships of some marine organisms of the north- 

 east Pacific to water temperatures, particularly during 1957. 

 Calif Dep. Fish Game, Fish Bull. 112, 62 p. 



Reid, J. L., Jr., G. I. Roden, and J. G. Wyllie. 



1958. Studies of the California Current System, /w CalCOFI 

 progress report, 7-1-56 to 1-1-58, p. 27-56. Sacramento, CA. 

 Schwartzlose, R. a. 



1963. Nearshore currents of the western United States and 

 Baja California as measured by drift bottles. In CalCOFI 

 progress report, 7-1-60 to 6-3-62, p. 15-22. Sacramento, CA. 

 Shaklee, J. B., C. S. Tamaru, and R. S. Waples. 



1982. Speciation and evolution of marine fishes studied by 

 the electrophoretic analysis of proteins. Pac. Sci. 36:141- 

 157. 

 Smith, P. J., and Y. Fujio. 



1982. Genetic variation in marine teleosts: high variability 

 in habitat specialists and low variability in habitat general- 

 ists. Mar. Biol. 69:7-20. 



SOKAL, R. R., AND F. J. ROHLF. 



1981. Biometry. 2d ed. W. H. Freeman, San Franc. 

 Spieth, p. T. 



1974. Gene flow and genetic differentiation. Genetics 78: 

 961-965. 



Tegner, M. J., AND R. A. Butler. 



1985. A drift tube study of the dispersal potential of green 



10 



