632 



Fishery Bulletin 97(3), 1999 



100 

 80 

 60H 

 40 

 20-1 

 



80- 

 60- 

 40 

 20- 



0- 

 80 

 60-1 

 40 

 20 





 100 

 80 

 60 

 40 

 20 







Stations (1994) 



Figure 6 



Mean standard lengths by station and date in 1994 for all collections that had 

 >10 fish. Numbers in bars are number offish measured. Different letters show 

 significant differences among stations and dates ( ANOVA; Waller-Duncan test; 

 P<0.05). 



26 Sep 



creased skill, would make an acceptable preparation 

 of the second otolith from the same fish. 



Hatching-date distributions clearly indicated sepa- 

 rate hatching cohorts with peaks approximately one 

 month apart. The multiple spawnings within a given 

 year in red snapper may be an adaptation to increase 

 survival. By spreading reproductive efforts over time, 

 a species may increase the probability of matching 

 the correct biotic and abiotic conditions for enhanced 

 survival and subsequent recruitment. 



Two differences were apparent when hatching-date 

 estimates were compared with estimated spawning 

 periods from gonadosomatic index (GSI) maxima 

 (Collins et al., 1996). First, GSI estimates showed 

 little indication of May spawning, as suggested by 

 May hatching dates in the present study; and sec- 

 ond, present estimates showed little indication of 

 August spawning, as indicated by high GSIs for red 

 snapper in August (Collins et al. 1996). These differ- 

 ences between hatch dates and GSIs were probably 



