DeMARTINl ET AL: DISTRIBUTION PATTERNS OF QUEENFISH 



lied, and reconstructed wet weight biomass esti- 

 mated (to the nearest milligram, based on a key of 

 reference prey weights). Values were summed for 

 the aggregate of each taxon in each stomach. A 

 compound measure of numbers (N), weight (Wt), 

 and frequency occurrence (FO) of prey (IRI = 

 {(%N + 7r Wt)%FO}; Pinkasetal. 1971) was used 

 to characterize temporal and spatial variations in 

 the overall importance of various prey to the diet of 

 immature and adult male and female queenfish. 



RESULTS 



Catch per Unit of Effort 



A large majority of the adults of both sexes, as 

 well as immature queenfish, occurred at shallow 

 depths (5-10 m) during daylight hours throughout 

 most of the year (Fig. 1). A plurality of immature 

 and adult fish of both sexes occurred at shallow 

 depths at night as well; however, the distribution 

 of numbers spread farther offshore at night, espe- 

 cially for adult fish (Fig. 1). The nocturnal offshore 

 distribution appears to have been especially 

 marked for adult males (Fig. IB). This diel shift in 

 the depth distribution of queenfish is charac- 

 terized by the diel-by-depth interaction term in 

 the ANOVA (Table 1). The (nearly) significant date 

 effect for adults (and insignificant date effect for 



immatures) in the ANOVA (Table 1) reflects the 

 general offshore emigration of adult, but not im- 

 mature, queenfish during late fall and early 



Table l. — Results of Wilson's Three- Way Non- 

 parametric ANOVA with equal replication (Wil- 

 son 1956) for the effects of diel period (day, night), 

 bottom depth (5-10, 11-16, 18-27 m), and date 

 (cruise ) on the lampara seine CPUE of immature, 

 adult male, and adult female queenfish. Data for 

 14 paired, day/night cruises made during the 

 period from September 1979 to March 1981, inclu- 

 sive. (* denotes significance at P s 0.05). 



IMMATURE 



C 

 FEMALE 



DEEP 



Figure l. — Bar histogram chart of arithmetic mean CPUE (catch per seine haul) during the day versus at night, 

 in the shallow (SHAL, 5-10 m), middepth (MID, 11-16 m), and deep (DEEP, 18-27 m) depth blocks, for immature, 

 adult male, and adult female queenfish. All data represent samples from 14 paired, day /night cruises made from 

 September 1979 to March 1981, inclusive. 



173 



