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Robinson and Ware (1999) used the simple regression between temperature and Pacific hake biomass that Ware and McFarlane developed to help parameterize a one-dimensional trophic model of the pelagic ecosystem in the La Perouse Bank region, in which inter-annual variability in predator-prey relationships between Pacific hake, herring, and euphausiids were important.
Pollock sampled in the EBS during 1982-2006 consumed primarily euphausiids and copepods (Fig.
Early during this same time period, individually isolated age 1 RKC predators were fed with euphausiids to reduce predation on the age 0 RKC when introduced into the experimental arenas.
Fedoseev and Bukhtiyarov(20) found that spotted seals in the Okhotsk Sea fed on walleye pollock, Theragra chalcogramma (in 65% of the stomachs sampled (n=23)), navaga, Eleginus navaga (in 5%), Pacific sand lance (in 5%), and euphausiids and decapods (in 16%).
Euphausiids composed 61% of SCW and were the main determinant of seasonal change in the diets of fish in the Kodiak and Semidi regions.
Most prey species identified from bowhead whale stomach contents were crustacean zooplankton, particularly euphausiids and copepods ranging in length from 3 to 30 mm.
Diets ofthese fishes varied temporally, spatially, and between species, but were dominated by insects, euphausiids, and decapod larvae.
alutus) actively fed on euphausiids just above sea-whip "forests" during the day and were observed to be less active within the sea-whip habitat at night (Brodeur, 2001).
Although euphausiids were the most common major prey of all three predators, gelatinous zooplankton and fishes were the most commonly consumed prey items during some seasonal quarters.
5 mm) comprised the majority of juvenile POP diets for all size classes; however, larger prey items such as euphausiids were consumed by medium and large juveniles (Fig.
blue whiting (Micromesistius poutassou), cephalopods, shrimps, and euphausiids, as well as epipelagic species such as Atlantic herring (Clupea harengus) and capelin (Mallotus villosus) (Bowering and Lilly, 1992; Dawe et al.
Comparison of diets between years showed that most variation occurred with changes in the contribution of euphausiids and brachyuran larvae to nekten diets.
2005) found several warm-water species of euphausiids, chaetognaths, and copepods in Oregon waters during the 1997-98 El Nino.
For both 2001 and 2002 combined, decapods, fish, and euphausiids accounted for about 90% of stomach content weight.
They feed on a wide variety of zooplankton taxa, copepods and euphausiids being the dominant prey (Vesin et al.