Development of Kelp Rockfish, Sebastes atrovirens (Jordan and Gilbert 1880), and Brown Rockfish, S. auriculatus (Girard 1854), from Birth to Pelagic Juvenile Stage, with Notes on Early Larval Development of Black-and-Yellow Rockfish, S. chrysomelas (Jord

摘要

Larval kelp (Sebastes atrovirens), brown (S. auriculatus), and blackand- yellow (S. chrysomelas) rock.sh were reared from known adults, to pre.exion stage, nine days after birth for S. chrysomelas, to late post.exion stage for S. atrovirens, and to pelagic juvenile stage for S. auriculatus. Larval S. atrovirens and S. chrysomelas were about 4.6 mm body length (BL) and S. auriculatus about 5.2 mm BL at birth. Both S. atrovirens and S. auriculatus underwent notochord .exion at about 6-9 mm BL. Sebastes atrovirens transform to the pelagic juvenile stage at about 14-16 mm BL and S. auriculatus transformed at ca. 25 mm BL. Early larvae of all three species were characterized by melanistic pigment dorsally on the head, on the gut, on most of the ventral margin of the tail, and in a long series on the dorsal margin of the tail. The purpose of this paper is to provide additional information on development of S. auriculatus and S. atrovirens from birth to pelagic juvenile stage, and early development of S. chrysomelas, based on laboratoryreared specimens. These are compared with larvae of the other Pteropodus species.