104
JOHN E. CUSHING
The first direct evidence for the existence of this source has recently
been found in samples from inshore spawners in the southern Gulf
of Maine. A new reagent hcteroimmune rabbit anti-herring recognizes
an antigen, D, that appears to be independent of C and to have potential value in distinguishing between Nova Scotian and George8 Bank
subpopulation derivates (Sindermann, 1962s). This series of studies is
thus revealing a complex of subpopulation among herring contributing
to stocks in the Gulf of Maine, the subdivision of which is in conforFIG. 2. Frequencies of fish from four alewife spawning populations that were negative
(Reproduced with permission from
at a11 test dilutions of lima bean extracts.
Sindermann, 1962a.)
mance with the distribution of ocean currents (Bumpus, 1960) and the
" parasite tags " of immature fish (Sindermann, 1961).
Alewives ( A h a pseudohurengus (Wilson)) are anadromous and can
readily be presumed to be divided into many subpopulations amenable
to blood group comparisons. This presumption has been confirmed
(Sindermann, 19628, 1963b) by the use of lima bean extracts which
showed large differences in the frequencies of fish with erythrocytes
negative to this reagent in four separate spawning populations (Fig. 2).
4. The Atlantic red!h ,
The Atlantic redfish (Bebastes marinus (L.)) presents a complex of
population relationships that is receiving considerable attention.
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