380 
Fishery Bulletin 96(2), 1998 
Cy noscion regalis (200-750 oocytes) ( Lowere-Barbieri 
et al., 1996). 
Accurate annual fecundity estimations are diffi- 
cult to determine for multiple spawning fishes with 
an extended reproductive season (Brown-Peterson et 
al., 1988). During November-March, a female C. 
striatus would spawn 22 times with a spawning fre- 
quency of 8 days. Consequently, annual fecundity 
estimates for a 40.0-cm-TL female would be about 
2.0 million eggs. However, annual egg production 
depends on spawning frequency, and it is possible 
that this parameter varies during the reproductive 
season and between years (Lowerre-Barbieri et al., 
1996). The annual fecundity estimate for C. striatus 
was similar to that obtained for white croaker of the 
Rio de la Plata estuary ( Micropogonias furnieri) (1.8 
million eggs for a 40.0 cm TL female) (Macchi et al., 
in press). Both species are among the most heavily ex- 
ploited coastal resources in Argentina and Uruguay. 
Acknowledgments 
This research was part of INIDEP’s Coastal Project. 
I thank Teresa Carle and Virginia Habegger for the 
preparations of histological sections. 
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