Bucklin. A.1, H.H. Wiebe2 and D.J. McGillicuddy3
1University of New Hampshire
2Biology Department, Woods Hole Oceanographic
Institution, Woods Hole, MA 02543
3Applied Ocean Physics & Engineering Department,
Woods Hole Oceanographic
Institution, Woods Hole, MA 02543
The cryptic copepods, Pseudocalanus moultoni and P. newmani,
exhibit different month-to-month patterns of abundance and vertical
distribution in the different regions of Georges Bank. Using the
standard grid designed for the Northwest Atlantic synthesis phase
activities, concentrations of females for each species were mapped
for three depth strata: surface (0 - 15m), sub-surface (15 - 40m),
and deep (below 40m). Broadscale standard stations were assorted
into five regions of Georges Bank: 1) northern flank, 2) Bank
crest, 3) northeast peak, 4) southern flank, and 5) Slope Water.
During stratified conditions (April to June), a significantly
greater proportion of P. newmani are found in surface waters, where
they are subject to wind-driven transport. The preference of P.
moultoni for deeper waters was most pronounced during May and June
and in two regions, Bank crest and northeast peak. Concentration of
P. moultoni in deeper waters may increase the likelihood of
retention of these populations on Georges Bank.
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