. Bulletin. Science. FOOD HABITS OF SPOTTED SAND BASS A. r T T*"" 12- yS 8- #^ ^i 4- ^ I I I i i i i i. iâr 10 15 20 25 30 35 40 45 50 No. guts analyzed Fig. 4. Cumulative prey curves for: A) fall of 1992 (warm period); and B) spring of 1994 (cool period). Symbols are for (â ) small spotted sand bass, 50-150 mm SL (n = 35); (â¢) medium spotted sand bass, 150-229 mm SL (n = 39); and (â¦) large spotted sand bass, 230-310 mm SL (n = 42) collected in 1992, and for small (n = 15), medium (n = 41), and large spotted sand bass (n = 41) collected in 1994. Order of gut analysis was randomized
. Bulletin. Science. FOOD HABITS OF SPOTTED SAND BASS A. r T T*"" 12- yS 8- #^ ^i 4- ^ I I I i i i i i. iâr 10 15 20 25 30 35 40 45 50 No. guts analyzed Fig. 4. Cumulative prey curves for: A) fall of 1992 (warm period); and B) spring of 1994 (cool period). Symbols are for (â ) small spotted sand bass, 50-150 mm SL (n = 35); (â¢) medium spotted sand bass, 150-229 mm SL (n = 39); and (â¦) large spotted sand bass, 230-310 mm SL (n = 42) collected in 1992, and for small (n = 15), medium (n = 41), and large spotted sand bass (n = 41) collected in 1994. Order of gut analysis was randomized five times and a mean number of prey items plotted. Error bars represent one plus or minus one standard deviation. Clear asymptotes indicate a sufficient sample size for precisely characterizing diet. larger spotted sand bass, fish continued to be a common prey item (33% by %IRI); however, ophiuroids (50% by %IRI) made up the majority of the stomach contents (Fig. 5d). In spring 1994, small sand bass ate primarily brachyuran crabs, mysids and gammarid amphipods (Fig. 6b), with crustaceans contributing 99% to the diet by %IRI. Molluscs and annelids were absent as prey in small spotted sand bass. Medium sized fish also consumed primarily crustaceans; however, this prey cat- egory was dominated almost exclusively by mysids (89% by %IRI; Fig. 6c). Ophiuroids, molluscs, annelids, and algae were found in the stomach contents infrequently. Fish as prey were more important in large sand bass (25% by %IRI) compared to small and medium size classes, although mysids (48% by %IRI) and brachyuran crabs (20% by %IRI) were still common prey items identified for this size class (Fig. 6d). Ophiuroids, molluscs, annelids, coral, and algae were found infrequently. Among size classes, indices indicated that species richness was highest for the large size class, and prey evenness was highest for the small size class for both sampling periods (Table 2). However, diversity was also highest in
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