1997) held that the decline in euphausiid
abundance off the west coast of Vancouver Island later in late summer, and the development of upwelling-driven high productivity offshore, led to a shift in Pacific hake distribution towards the shelf-break, where flow-field dynamics became more important influences on Pacific hake distribution.
In the Shumagin region, the proportional weight of euphausiids
increased from 36% in LSum00 to 64% in Sum01; subsequently, in LSum01, 51% of the stomach contents were euphausiid
juveniles and adults and 40% were fish.
Diets ofthese fishes varied temporally, spatially, and between species, but were dominated by insects, euphausiids
, and decapod larvae.
This result occurs because the euphausiid
group was the dominant prey species group in the diet composition of those stomach samples.
1) that had mixed zooplankton diets of copepods, euphausiid
eggs, and euphausiids
The weighted proportions were then summed across all months and subareas and multiplied by one minus the percentage of assumed euphausiid
occurrence within the diet.
Pollock sampled in the EBS during 1982-2006 consumed primarily euphausiids
and copepods (Fig.
Later, larger crabs (>8 mm in carapace width (CW)), cultured to serve as predators, were held individually in mesh cells (diameter, 10 cm; water depth, 10 era) and were fed fresh-frozen euphausiids
(Euphausia pacifica) 3 times per week.
Crustaceans, like euphausiids
, can be a substantial component of the diet of sanddabs (Hopkins and Hancock 1980) and euphausiids
can serve as intermediate hosts for Anisakis sp.
Most prey species identified from bowhead whale stomach contents were crustacean zooplankton, particularly euphausiids
and copepods ranging in length from 3 to 30 mm.
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).
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.