7. CHEMICAL COMPOSITION
217
carotenoids in euphausiids and anyone requiring information on their
occurrence in other invertebrates should consult the review by Fisher
and Kon (1959). Vitamin A has been found in every euphausiid so far
analysed and the concentrations found in some species are shown in
701
M.norveoko
c
jj 20,
T: raschii
Vitamin A (i.u.fs)
FIG. 74. Frequency distribution of the concentrations of vitamin A in 258 samples of
Meganyctiphmes norwegica and 190 samples of Thysanoessa raschii. (After Fisher
et al., 1955.)
Table XVII. The highest concentration so far recorded is that of
18.3 pg/g wet wt in Thysanoessa gregaria. These levels are much
higher than the average levels found in molluscs, or crustacean penaeids
and copepods (Fisher et al., 1956a,b, 1957, 1964). The average concentrations in Table XVII have been weighted for the number of
217
carotenoids in euphausiids and anyone requiring information on their
occurrence in other invertebrates should consult the review by Fisher
and Kon (1959). Vitamin A has been found in every euphausiid so far
analysed and the concentrations found in some species are shown in
701
M.norveoko
c
jj 20,
T: raschii
Vitamin A (i.u.fs)
FIG. 74. Frequency distribution of the concentrations of vitamin A in 258 samples of
Meganyctiphmes norwegica and 190 samples of Thysanoessa raschii. (After Fisher
et al., 1955.)
Table XVII. The highest concentration so far recorded is that of
18.3 pg/g wet wt in Thysanoessa gregaria. These levels are much
higher than the average levels found in molluscs, or crustacean penaeids
and copepods (Fisher et al., 1956a,b, 1957, 1964). The average concentrations in Table XVII have been weighted for the number of