RI< II I ARDSON and PE ARCY: COASTAL AND OCEANIC FISH LARVAE 



440f 



400 



360 



320 



280- 



240- 



O 



200- 



160 



120- 



> 



K 80 

 < 



O 4 0h 



-z. 







1971 



mm FEB -MAR -APR 



I 1 MAY -JUN-JUL 



C—l AUG-SEP-OCT-NOV-DEC 



tl 



i ti fa . 



2 6 9 



28 37 46 56 65 



FIGURE 5.— Mean standardized 

 abundance offish larvae by station in 

 1971 and 1972. 



200 

 160 

 120- 



1 — TT 



74 



93 



1972 



 MAR -APR 

 CZ) MAY -JUN-JUL 



\lA 



2 6 9 



(Table 2), 87% presumably come from demersal 

 eggs (Breder and Rosen 1966) including all the 

 osmerids, cottids, agonids, cyclopterids, and 

 blennioids as well as Clupea harengus pallasi, 

 Ophiodon elongatus, Ronquilus jordani, Am- 

 modytes hexapterus, andClevelandia ios. The eggs 

 of Microgadus proximus are unknown but may 

 also be demersal, as are those of M. tomcod in the 

 Atlantic. Those not derived from demersal eggs, 

 i.e., the six coastal flatfishes, come from small (~1 

 mm or less in diameter) planktonic eggs. Of the 31 

 offshore taxa, 81% presumably come from plank- 

 tonic eggs. Eggs of the bathylagids, myctophids, 

 bothids, and Engraulis mordax are probably all 

 relatively small (~1 mm or less) whereas those of 

 Chauliodus macouni, Anoplopoma fimbria, Icos- 

 teus aenigmaticus, Atheresthes stomias, Embas- 

 sichthys bathybius, Glyptocephalus zachirus, and 

 Microstomas paciftcus are large, usually >2 mm. 

 Eggs of Tactostoma macropus, Icichthys locking- 



is 28 37 46 56 65 

 STATIONS 



74 



93 



III 



toni, Eopsetta jordani, and Lyopsetta exilis are in- 

 termediate in size. Eggs of Sebastolobus spp., also 

 of intermediate size, occur in floating masses 

 rather than individually (Pearcy 1962). Larvae of 

 the live-bearers Brosmophycis marginata, 

 Sebastes spp., and possibly Ophidiidae sp. 1 are 

 extruded. Of the offshore taxa, only Hexagrammos 

 spp. and perhaps Psychrolutes-like sp. 1 come from 

 demersal eggs. 



Coastal Assemblage 



One hundred thirty-nine samples were taken in 

 the coastal assemblage, five at night, four at dusk 

 or dawn, and the rest during daylight. All but four 

 samples contained larvae, yielding 16,197 

 specimens or a standardized total [^ (number of 

 larvae under 10 m 2 sea surface in each sample)] of 

 11,474. 



133 



