102
JOHN E. CUSHINO
reported on conclusions reached after a very extensive study involving
the typing of over 2000 sardines with both heteroimmune and normal
mums. These recognize two systems, B and C, of blood groups in this
species. The B system contained six phenotypes, and the C system
FIG. 1. Distribution of C-positive sardines within the northorn arid southern eub(Reproduced with permission, after data in Table 3, Vrooman,
populations.
1964.)
at least three phenotypes, one negative, and two involving a pair of
antigens showiiig a subtype relation to each other (C, and CJ. Figure 1
shows data on the frequencies of fish typed for the presence or absence
of C antigens. The presence of at least two reproductively isolated
populations, ‘( northern ” and “ southern ”, is indicated. Seasonal
shifts in the ranges of the ‘( northern ” and ‘( southern ’’ subpopula-
JOHN E. CUSHINO
reported on conclusions reached after a very extensive study involving
the typing of over 2000 sardines with both heteroimmune and normal
mums. These recognize two systems, B and C, of blood groups in this
species. The B system contained six phenotypes, and the C system
FIG. 1. Distribution of C-positive sardines within the northorn arid southern eub(Reproduced with permission, after data in Table 3, Vrooman,
populations.
1964.)
at least three phenotypes, one negative, and two involving a pair of
antigens showiiig a subtype relation to each other (C, and CJ. Figure 1
shows data on the frequencies of fish typed for the presence or absence
of C antigens. The presence of at least two reproductively isolated
populations, ‘( northern ” and “ southern ”, is indicated. Seasonal
shifts in the ranges of the ‘( northern ” and ‘( southern ’’ subpopula-