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Fig. 2. Activities of ß-hydroxybutyrate dehydrogenase (BHDBH; µmol
min-1 g-1) in various tissues at various times
post-feeding in dogfish shark (Squalus acanthias). Values are means
± s.e.m. (N=3-12 per time point). L, liver; M, muscle; G,
gill; I, intestine; R, rectal gland; E, esophagus; S1, anterior stomach; S2,
posterior stomach; B, brain and K, kidney. NB kidney samples were taken only
from starved fish and at 48 h post-feeding. Increases in activity in rectal
gland at all times post-feeding were significantly different from that of
starved fish (P<0.05). Significant changes in enzyme activities
for other tissues are indicated by an asterisk (P<0.05).