Eg. Durbin et al., LATE FALL EARLY WINTER RECRUITMENT OF CALANUS-FINMARCHICUS ON GEORGESBANK, Marine ecology. Progress series, 151(1-3), 1997, pp. 103-114
The development of Calanus finmarchicus in the Gulf of Maine (GOM), US
A, and on Georges Bank (GB) was investigated during late fall, 1994, a
nd winter, 1995, as part of the US-GLOBEC Georges Bank program. During
November almost all of the C. finmarchicus population in both regions
was present as C5(r) with a small proportion of C4 and females. There
were very few animals on GB. In the southern GOM about a third of the
C. finmarchicus population was in the upper 80 m and actively feeding
; the remainder were below 120 m. On GB the C. finmarchicus population
was also feeding; gut pigment content in both areas was between 3 and
13 ng copepod(-1). About one third of the adult females on GB were re
productively active while none in the GOM were reproductively active.
By January C. finmarchicus C6 females formed a large proportion of the
older stage animals on the Bank and in surface waters of the southern
GOM. These were actively feeding and reproducing with a large cohort
of young nauplii of C. finmarchicus present in the southern GOM and sm
aller numbers on the northeast peak of the Bank. There were very few C
. finmarchicus nauplii on the crest of the Bank or on the southern fla
nk. Based on abundances and stage composition, it appeared that spawni
ng began in late December and that repopulation of the Bank took place
in the region of the NE peak, with nauplii and reproductively active
females being transported onto this region of the Bank from the GOM.