Literature Cited 



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1969. Marine mammal communications; social and ecolog- 

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Harrison, R. J., R. C. Boice. and R. L. Brownell. Jr 



1969 Reproduction in wild and captive dolphins. Nature 

 (Lond.) 222:1143-1147. 



Harrison, R, J., R, L. Brownell, Jr , and R, C. Boice 



1972. Reproduction and gonadal appearances in some 

 odontocetes. In R. J. Harrison (editorl. Functional 

 anatomy of marine mammals, Vol 1, p 361-429 

 Academic Press, N.Y. 



Harrison, R. J., and S. H. Ridgway. 



1971. Gonadal activity in some bottlenose dolphins iTur- 

 Slops truncatus). J. Zool. (Lond. I 165:355-366. 



Kleinenberg. S. E., and G. A. Klevezal 



1962. Towards a method for determining the age of toothed 

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 OHSUMI, S. 



1971. Some investigations on the school structure of sperm 

 whale. Sci Rep Whales Res. Inst. Tokyo 23:1-25. 

 PERRIN. W. F. 



1975. Variation of spotted and spinner porpoise (genus 

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 Scripps Inst. Oceanogr. Univ. Calif. 21, 206 p 



PERRIN. W. F., J. M. COE. AND J. R. ZWEIFEL 



1976. Growth and reproduction of the spotted porpoise, 

 Stenella atteituata, in the offshore eastern tropical Pac- 

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SIMMONS. K., AND W. W. GREULICH 



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 SINCLAIR, D. 



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



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Clifford a. Hui 



Biomedtal Branch 



Naval Ocean Systems Center 



San Diego. CA 92152 



LARVAL DEVELOPMENT OF GOBIESO\ 



RHESSODON (GOBIESOCIDAE) WITH NOTES 



ON THE LARVA OF RIMICOLA MVSCARVM 



Seven species of clingfishes of the genera Gohiesox 

 and Rimicola occupy the rocky inter- and subtidal 

 areas along the California coast. Extreme mod- 

 ification of the pelvic fins into a suction disc ena- 

 bles them to cling to rock and algal substrates. 

 Although all clingfish species are listed as being 



uncommon to rare in California by Miller and Lea 

 (1972). clingfish larvae are collected on a regular 

 basis (although in low numbers) by monitoring 

 programs dealing with fish larvae (Brewer,' 

 McGowen,^ and White^). Of the seven species re- 

 corded in southern California, adults of only two, 

 G. rhessodon and R. nuiscariim, are usually en- 

 countered (pers. obs.). 



Knowledge of larval stages of eastern Pacific 

 (especially Californian) fishes is largely limited to 

 pelagic species of those coastal species with pro- 

 tracted pelagic larval periods (Ahlstrom 1965; 

 Moser et al. 1977). Larvae of many nearshore, 

 coastal fishes are undescribed. Recent concern 

 over the affects of harbor development and ther- 

 mal discharge and entrainment from power plants 

 on fish populations has intensified the need for 

 proper identification of fish eggs and larvae. 



The principal systematic work to date on the 

 adults of eastern Pacific clingfishes was carried 

 out by Briggs (1955). No previous works on the 

 larvae of eastern Pacific clingfishes have been car- 

 ried out, although the eggs and larvae of an Atlan- 

 tic clingfish, G. strumosus, are well known (Run- 

 yan 1961; Dovel 196.3). 



Descriptions of a larval series of G. r-hessodon 

 and early larvae of R. muscarum are presented 

 here as taxonomic aids to larval fish investigators 

 working in the California coastal region. 



Methods and Materials 



Eggs and adults of G. rhessndnn and R. inus- 

 cariini were collected in June 1977 from the inter- 

 tidal zone at low tide at Catalina Harbor and Little 

 Harbor, Santa Catalina Island, Calif. Adults with 

 their eggs were transported to the Catalina 

 Marine Science Center (CMSC) operated by the 

 University of Southern California and maintained 

 in tanks with running seawater. The failure of 

 hatched larvae to feed (probably due to lack of 

 suitable food) precluded culturing past 2 days (4.0 

 mm). Additional specimens of G. rhessodon 

 utilized in the series were obtained by vertical 

 plankton tow under a night-light at the CMSC 

 dock in Big Fisherman's Cove (4.7 mm) in June 

 1977; by horizontal tow in King Harbor, Redondo 



'Gary D. Brewer, Institute for Marine and Coastal Studies, 

 University of Southern California, Los Angeles, CA 90007. Pers. 

 commun. June 1977. 



^Gerald E. McGowen, Southern California Edison (Occidental 

 Collegel, Redondo Beach, Calif Pers. commun. June 1977. 



^Wayne S. White, U.S. Fish and Wildlife Service, Laguna 

 Niguel, Calif. Pers. commun. August 1977. 



300 



FISHERY BULLETIN VOL 



