abundance in the 50-100 m layer was significantly higher than in the 100-150 m layer (p<0.05), and, the abundance in the 50-100 m layer was higher than the 0-50 m layer, although differences were not significant (p=0.06).
(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.
After a few days, large quantities of euphausiid
eggs are produced, and in three or four weeks these will give rise to a new generation of larvae that compete with the swarm of Calanus plumchrus to eat the flagellates.
Data from this small sample reflected the importance of euphausiids
in the diet of Cassin's Auklets during the early part of the breeding season, as in Ancient Murrelets foraging off Langara Island before fish assumed greater importance later in the breeding season (Sealy 1975).
Latitude, myctophid length, SST, SCHL, zooplankton volume, and euphausiid
composition in the zooplankton net samples yielded an importance rank of zero.
This table shows the presence of some species like the copepods Copilia quadrata, Oithona setigera, the euphausiid
On the effects of interannual variations in circulation and temperature upon euphausiids
of the California Current.
An analysis of sinking rates of natural copepod and euphausiid
In some cases, this leads to a change from one functional eye type to another, for instance, from the apposition to the superposition system in the rock lobster Panulirus longipes (Meyer-Rochow, 1975), the mysid Neomysis integer, and the euphausiid
Thysanoessa raschii (Nilsson et al., 1986).
The annual cycle of euphausiids
in juvenile walleye pollock diet likely reflects the predator-prey size relationship superimposed on annual cycles of fish growth and euphausiid
Daylight collection, and the use of a ring net, likely resulted in underestimating euphausiid
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., 2003).