FISHERY BULLETIN: VOL. 74, NO. 3 



28 



24 



20. 



BAIRDIELLA 

 °\ (6537,-7.1015,0.0650)* 



J I 



15 25 35 45 



O 

 o 



28r 



24- 



20- 



16- 



12 



LlI 



liJ 8 



tr 



^ 22r 



< 



a: 



LlI 



14- 



10 



24- 



20 



SHEEPHEAD 

 _ ^ (830.3,-78980,0.0250)* 



16 



12 



ANCHOVY 

 (1861,-5.4572,0.0626) 



I I I I I 



JACK MACKEREL - 

 *° (6910,-6.1172,0.0599) 



I I I I 



SANDDAB 

 (1159,-5.1563,0.0629)* 



J I I I I I I I L 



HAKE 

 \(780.3,-4.l383,0.058l) 



SARDINE 

 .(69IO,-6.2026,0£)905) 



J L 



TURBOT 

 (1012,-5.2103,0.0444)^ 



J I I I \ i I I I 1 1 1 



PACIFIC MACKEREL |- 

 (3646,-6.4705,0.05351 



J L 



SENORITA 

 (8293 ,-7.6534 ,0.0624 )* 



J 



50 100 150 



50 



100 



150 



50 100 



150 200 



HOURS 



Figure 4.-0bserved (0) and estimated (curve) (parameters in parentheses are /„, ni, and fi for the 



-m(l - f"^ ^) 



equation /t = /of and * indicates time from stage III eggs) incubation times for anchovy, 



Engraulis mordax [combined data from Lasker (1964) and Kramer (unpubl. data) available at 

 SWFC]; hake, Merluccius productus; sheephead, Pimelometopon pulchrum; bairdiella, Bairdiella 

 icistia; jack mackerel, Trachurus symmetricus; sardine, Sardinops sagax; Pacific mackerel, 

 Scomber japonic us (Watanabe 1970); sanddab, Ciiharichthys stigmaeus; turbot, Pleuronichthys 

 decurrens; senorita, Oxyjulis californica. 



developmental egg stages, hatching, and develop- 

 ment of the functional jav^^ occur at fixed points 

 along the curves. Ahlstrom (1943) reported time to 

 several developmental egg stages at different 



temperatures from field observations. In addition, 

 Lasker (1964) showed incubation times and time to 

 the development of the functional jaw for a wider 

 range of temperatures. Each of these events can 



616 



