FISHERY BULLETIN: VOL. 83, NO. 2 



winter (also see Allen and DeMartini 1983). The 

 patterns illustrated by Figure 1 remained consis- 

 tent throughout most of the year, when queenfish 

 occurred nearshore (also see below). 



Size Composition 



bled the size distribution of the respective cate- 

 gory caught at night at 5-27 m depths (Fig. 4A, B, 

 C), even though the large numbers of fish mea- 

 sured (hence great power) yielded statistically 

 significant differences (Table 2). Clearly, queen- 

 fish present at 5-27 m depths at night occur at 5-10 



The size composition of queenfish within sex and 

 maturity classes also generally differed between 

 diel periods within depth blocks (Fig. 2, Table 2). 

 Adult males, adult females, and immature fish of 

 both sexes were of generally larger body sizes in 

 day versus night samples within the shallow 

 depth block (Fig. 2, Table 2). At night, larger sized 

 queenfish of all categories occurred in samples 

 from middepths versus the shallow region (Fig. 3, 

 Table 2). 



The diel differences in the size composition of 

 queenfish within depth blocks generally dis- 

 appeared when catches were pooled over depth 

 blocks throughout the year (Fig. 4). Specifically, 

 the length-frequency distribution of each sex 

 category in day-shallow samples closely resem- 



TABLE 2. — Results of Kolmogorov-Smirnov Two Sample com- 

 parisons (Siegel 1956) of the length-frequency distributions of 

 sample queenfish of various sex and maturity classes between 

 diel periods and/or depth blocks. Based on all 14 D/N pairs of 

 cruise data for the period September 1979-March 1981. See 

 Figures 2-4 for data histograms. 



IMMATURE QUEENFISH 



SIZE FREQUENCIES 



DEPTH=.5-10 M 



DAY N=9394 



NIGHT N=2247 



UJ 



o 



cr 



O 



(J 



o 



u. 

 o 



>- 

 o 



UJ 



o 



UJ 



a: 



UJ 



(J 





X 



z 



10- 



5- 



0-- 



5- 



10- 



15- 



10 



20 



30 



40 



rrrrp, 



50 



rrrrp-, 



80 



70 



""I" 



eo 



90 



' " I "" 

 100 



no 



120 130 IdO 



150 



STANDARD LENGTH (MM) 



Figure 2. — Relative (percenti length-frequency distributions of lAi immature, <Bi adult male, and (C) adult female 

 queenfish, caught during the day versus at night in the shallow depth block (see Figure 1 caption for details). Day/night 

 data are plotted above, below the horizontal axis in each panel. 



174 



