Pseudocalanus spp. in the Western Gulf of Maine
§ In MARMAP surveys 1977 –
1987, Pseudocalanus spp.
shows a seasonal cycle of
abundance, with two population
centers:
     Western Gulf of Maine
     Georges Bank

§ Davis (1984) hypothesized the
Western Gulf of Maine is a
source region for the Georges
Bank population
§ McGillicuddy et al. (1998)
concluded that the populations
are functionally distinct, with
geographically-specific regions
of growth and mortality