LAROCHE and RICHARDSON: DEVELOPMENT OF LARVAE AND JUVENILES OF ROCKFISHES 



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peared to range as extensively as larvae. Benthic 

 juveniles were taken close to the coast at depths of 

 9-37 m. 



Reported parturition times for S. entomelas are 

 January through March off central California 

 (Phillips 1958). Larvae <15 mm long were taken 

 March through June, although most were taken in 

 April and May. Larvae and pelagic juveniles >15 

 mm were taken April through June. Benthic 

 juveniles were taken only in June. Lack of benthic 

 juveniles in our collections from other months is 

 probably due to inadequate sampling. 



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Standard Length (mm) 



Figure 5. — Seasonal occuirence of larvae and juveniles of 

 Sehastes entomelas off Oregon. Data from 1961 through 1978 

 combined. Solid bars indicate pelagic stages, open bars indicate 

 benthic stages. 



(Snytko and Fadeev^). Data from Niska (1976) 

 show that =917f of the total Oregon trawl catch of 

 S. entomelas landed from 1963 through 1971 was 

 taken from depths of 110-218 m. Highest concen- 

 trations of S. entomelas found during the 1977 rock- 

 fish survey between Pt. Hueneme, Calif., lat. 

 34°00 ' N, and Cape Flattery, Wash., lat. 48°29' N, 

 were at depths of 91-181 m between Cape Blanco, 

 Oreg., lat. 43°00' N, and Cape Flattery (Gunder- 

 son and Sample^). Larval and transforming S. 

 entomelas, in our collections were captured at sta- 

 tions — 9-306 km offshore. Pelagic juveniles ap- 



■Snytko, V A.,andN.S. Fadeev 1974. Data on distribution 

 of some species of sea perches along the Pacific coast of North 

 America during the summer-autumn seasons. Document sub- 

 mitted at the Canada-USSR meeting on fisheries in Moscow- 

 Batumi, USSR- November 1974, 14 p. (Transl. .3436, Can. Tran.sl. 

 Ser.). 



•^Gunderson, D. R., and T. M, Sample. 1978. Distribution 

 and abundance of rockfish off Washington, Oregon and Califor- 

 nia during 1977. Unpubl. rep.. 45 p. Northwest and Alaska 

 Fisheries Center, National Marine Fisheries Service, NOAA, 

 Seattle, WA 98112. 



SEBASTES ZACENTRVS (GILBERT) 



Literature (Figures 6-8). — The pigment pattern of 

 S. zacentrus preextrusion larvae was described by 

 Efremenko and Lisovenko (1970), including a 

 figure; Westrheim (1975); Westrheim et al.^; and 

 Harling et al. (footnote 6), including figures. De- 

 scriptions by Efremenko and Lisovenko (1970), 

 Westrheim (1975), and Westrheim et al. (footnote 

 9) agree that preextrusion larvae (mean 4.2, 4.3, 

 and 4.5 mm TL, respectively) have a postanal ven- 

 tral row of melanophores (15-21, usually >16, and 

 15-20, respectively) which usually stops short of 

 the anus by at least four myomeres with usually at 

 least one melanophore in the hypural region. 

 Melanophores also appear over the gut. No dorsal 

 row of pigment is present. Harling et al. (footnote 

 6) described and illustrated two forms of S. zacen- 

 trus preextrusion larvae, both with mean 5.0 mm 

 TL. One form had 15-18 ventral midline 

 melanophores which stopped short of the anus by 

 four myomeres, a hypural spot, and gut pigment. 

 The second form had 18-21 ventral midline 

 melanophores which did not stop short of the anus 

 by four myomeres, 9-12 dorsal midline 

 melanophores, considerable pigment encircling 

 the yolk, a large lateral melanophore midway be- 

 tween the anus and tail tip, and several 

 melanophores in the hypural region. It seems 

 quite unlikely that the latter form is the same as 

 the former and merely a result of within species 

 variation as suggested by Hai'ling et al. (footnote 

 6). Possibly it may reflect misidentification of the 

 adult from which the larvae were taken. Since the 

 two forms described by Harling et al. were consid- 



■'Westrheim, S. J., W, R. Harling. D. Davenport, and M. S. 

 Smith. 1968. Preliminary report on maturity, .spawning season 

 and larval identification of rockfishes \.Sehastodes) collected off 

 British Columbia in 1968. Fish. Res. Board Can., Manuscr. Rep. 

 Ser. 1005, 28 p. 



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