They contended that euphausiid
prey availability driven by changes in ocean conditions, as well as the effect of prevailing currents on northward movement, were responsible.
In contrast, euphausiid
juveniles and adults occurred in half the stomachs and each individual weighed on average 19.
For example, the range of euphausiid
electivity values observed may be due to the pooling of euphausiid
species and life-history stages, potentially obscuring euphausiid
prey selection patterns observed in other studies (Schabetsberger et al.
This may account for the absence of euphausiid
species in the diets during that season.
spinifera was the dominant euphausiid
species consumed by nekton within this group.
proportions in the diet were based on historic stomach contents and assumed to be constant over time (no current euphausiid
abundance estimate is available).
The entire trophic chain, therefore, is increased, including a positive effect on the main prey of European hake recruits, in particular euphausiids
and mysids, which reach their highest diurnal abundance on the shelf break (Colloca et ah, 2004).
Plankton samples were comprised of primarily crustaceans (copepods, amphipods, euphausiids
, and decapod (brachyuran, pagurid, caridean) larvae) and chaetognaths with some polychaetes, gastropods, cnidarians, echinoderm larvae, and fish larvae and eggs; no red, blue, or golden king crab larvae were present.
It is an opportunistic feeder, preying on such benthic infauna as polychaetes, as well as such benthic, epibenthic, and water column organisms including shrimps, gammarid amphipods, mysids, euphausiids
, squids, and fishes (Allen 1982; Allen et al.
Perhaps BATHYDRACONIDS, CHANNICHTHYIDS, EUPHAUSIIDS, HARPAGIFERS or ICEQUABS would be preferable.
The whales grow to be about 60 feet long and weigh up to 75 tons, thanks to a diet of copepods, euphausiids
, and other small invertebrates.
The 10 prey categories were chaetognaths, euphausiids
, amphipods, copepods, crab, miscellaneous, and pollock (<60 mm standard length [SL], 60-200 mm SL, [greater than or equal to]200 mm SL, and unmeasured).
Pelagic young feed small crustaceans (Ven Tresca 1992), and adults prey on other fishes (anchovies, lanternfishes, small rockfishes), octopi, squids, krill (Love 1996), and crustaceans as euphausiids
, copepods, mysids, amphipods and carideans (Lea et al.
Food studies of northern rockfish in both the Gulf of Alaska and Aleutian Islands indicate that the fish feed predominantly on plankton, especially euphausiids
and copepods (Yang, 1993; 1996).
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%).