CalCOFI Reports, Vol. 30, 1989 - California Cooperative Oceanic ...

LAVANIEGOS-ESPEJO ET AL.: EL NINO EFFECTS ON GULF OF CALIFORNIA EUPHAUSIIDS
CalCOFl Rep., Vol. 30,1989
Figure 6. Temperature distributions
("C) at the 100-m depth.
the six 1983 high abundances of N. simplex,
>5,000 ind/1000 m', were to the north, at stations
where temperature was less than 21°C (figure 8). In
1984, abundances of >5,000 ind/1000 m' were more
common, with the highest interval, >50,000 ind/
1000 m', extending along much of the eastern coast
of the gulf. Nematoscelis d$jcilis was the species second
in abundance at 37% of the total euphausiids in
1983, and 4% in 1984 (table 1). Highest abundances
in 1984, >5,000 ind/1000 m3, appeared shifted
somewhat toward the north in the central gulf with
respect to 1983 (figure 9).
The remaining nine species contributed 100,000 ind/1000 m3 were found at
four of the stations (appendix 2), all of which were
along the eastern coast, whereas in spring 1983, all
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