Table 10. Meristics from cleared and stained larvae of Sebastes macdonaldl . 



_L 



Table 11. Mean lengths (mm) of Sebastes macdonaldl larvae coUected on cruises 



of the California Cooperative Oceanic Fisheries Investigations 



during 1953 and 1960. (Standardized numbers of larvae 



are shown in parentheses.) 



Figure 8. — Stations at which larvae of Sebastes macdonaldi were col- 

 lected during 4 yr (1953. 1%0. 1965. and 1966) of CalCOFI plankton 

 surveyB. Solid circles indicate stations where number of larvae ex- 

 ceeded mean number (4.8) for all positive stations. Area of Sequent 

 occupancy is outlined (see Ahlstrom 1%1 for complete grid). 



Sebastes jordani Gilbert, Figure 9 



Literature. — Morris (1956) described briefly the new- 

 ly extruded larvae of S. jordani and illustrated a 6.8-nim 

 specimen. 



Distinguishing features. — The larvae of the short- 

 belly rockfish, S. jordani, are larger at hatching than 

 other eastern Pacific species studied to date. Morris 

 (1956) illustrated a newly hatched S. jordani larva 6.8 

 mm in length, however, the mean for 20 measured 

 specimens was 5.4 mm. This is 0.75 mm larger than the 

 mean length for the next largest species listed by Morris. 

 Newly hatched larvae of most other eastern Pacific 

 species are between 3.8 and 5.0 mm. The 6.8-mm length 

 of Morris' illustrated specimen is above the upper range 

 of any eastern Pacific species known to us and is more 

 like the lengths of newly hatched larvae of the S. marinus 

 group of the Atlantic and some Japanese species. Other 

 similarities between the larvae of S. jordani and the S. 

 marinus group suggest that the two may be closely 

 related. Sebastes jordani larvae have an extended larval 

 period. Transformation into the pelagic juvenile stage oc- 

 curs at about 27 mm and specimens in the 28- to 30-mm 



18 



