Banks about 100 nautical miles west of San 

 Diego. R.H. Rosenblatt and C. C. Tuthill of 

 Scripps Institution of Oceanography identified 

 the rockfish taken January 20, and F.H. Berry 

 of the then BCF California Current Resources 

 Laboratory, La Jolla, Calif., identified those 

 ■collected on March 3 and April 11. 



The larger species of rockfish were meas- 

 ured and weighed fresh, and only the ovaries 

 were preserved in formalin. The smaller 

 species were preserved in formalin at cap- 

 ture. They were measured and weighed, and 

 the gonads removed the following week at the 

 laboratory. 



After the ovaries were weighed and exa- 

 mined, the distributions of egg diameters 

 were deternnined by the technique described 

 by MacGregor (1957) for eggs of the Pacific 

 sardine ( Sardinops caerulea). Embryos were 

 staged according to Ahlstrom's (1943) cri- 



teria for the Pacific sardine with the follow- 

 ing exception: because rockfish embryos are 

 more advanced than sardines at hatching, 

 stage X was considered as extending from 

 the end of Ahlstrom's stage IX to the begin- 

 ning of eye-pigment formation, and stage XI 

 from the beginning of eye-pign-ient formation 

 to hatching. The numbers of eggs or ennbryos 

 in each pair of ovaries were estimated by 

 counting a weighed sample of the ovary under 

 a binocular microscope and adjusting the 

 count to the total ovary weight. 



Tabular data on the female rockfish are 

 presented as follows: Forty-mile Bank, table 

 1; Rockpile, table 2; Tanner and Cortes 

 Banks, table 3, Additional data from the 

 literature are compared to this study in 

 table 4. Only the length and maturity data are 

 available for some of the fish listed in table 

 2 that were used for physiological studies. 



Table 1. — Data on eggs and embryos In the ovaries of female rockfish taken at Forty-mile Bank, January 20, 1961 



