LAROCHE and RICHARDSON: DEVELOPMENT AND OCCURRENCE OF ROCKFISHES 



20 



20r 





APR 



-I (( 1- 



MAY 



-If ^- 



JUN 



-• fl 1- 



JUL 



If >- 



AUG 



SEP 



OCT 



NOV 



W t^ fl 



40 60 80 100 



Standard Length (nnm) 



120 



140 



200 



220 



FIGURE 8. — Seasonal occurrence of larvae and juveniles of Sebastes flavidus off Oregon. Data from 1961 to 1978 combined. Solid bars 



indicate pelagic stages, open bars indicate benthic stages. 



inside tip of the lower jaw, along the anterior 

 margin of the maxillary, around the pterotic 

 spines, and on the operculum. The 10.6 mm larva 

 of S. melanops also has pigment on the snout, 

 along the posteroventral margin of the orbit, on 

 the cheek, and around the posttemporal spine. An 

 internal melanistic shield covers the gut in both 

 species appearing darkest on the dorsal surface. 

 In S. flavidus melanophores are present dorsally 

 on the nape, beneath the second dorsal fin, and on 

 the caudal peduncle. In addition to these, S. 

 melanops has melanophores beneath the first 



dorsal fin, possibly due to a more advanced state 

 of development for this specimen. Several 

 melanophores also occur along the posterior por- 

 tion of the anal fin base and the ventral margin of 

 the caudal peduncle in both species. Internal and 

 external melanophores are present near the mid- 

 line of the caudal peduncle and several 

 melanophores are at the margin of the hypural 

 elements. The pectoral and pelvic fin blades are 

 moderately pigmented with expanded, elongated 

 melanophores. The inner side of the pectoral base 

 is also pigmented. A discrete melanophore is pres- 



913 



