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Fig. 4. Gastric pH changes in juvenile leopard sharks fed a meal of squid at 1%
body mass Mb. Six sharks were fed a second meal of squid
(1%Mb) 24 h after the first. The pH of the gastric fluid
was determined 1 h after the second meal. All pH readings were corrected to a
standardized temperature of 18°C. Values are means ± 1
S.D.; numbers above bars represent sample sizes. Bars with the same
letter are statistically insignificant from each other (see text for
details).