Other commonly observed aquatic species included Pacific Chorus Frogs (Pseudacris regilla), Rough-skinned Newts (Taricha granulosa), and many aquatic invertebrates or larvae such as snails (Gastropoda), diving beetles (Dytiscidae), giant water bugs (Belostomatidae), mosquito larvae (Culicidae), caddisfly larvae (Trichoptera), dragonfly nymphs (Odonata), and an abundance of amphipods
Interestingly, the researchers found the amphipods
living in these trenches grow larger and live longer than their counterparts in shallower waters.
When the tide is low and a high pressure cell above makes the sea as smooth as satin, I visit the seashore to sieve for amphipods
. Such times are ideal as there is no wind to ruffle the water in the look box', which would make it impossible to see features of amphipods
and make photography difficult.
Common Pleustid Amphipods
of Southern California with a Projected Revision of the Family.
did not survive to the transition process from salinity 0 to 20, as they all died when the salinity reached 16, in the 8th week of cultivation (Fig.
The dominant prey of winter flounder, with respect to the %IRI, were amphipods
, harpacticoid and calanoid copepods, polychaetes, bivalves (e.g., clam siphons), insects (e.g., chironomid larvae), and isopods (Table 2).
Increased vulnerability of amphipods
to predation owing to altered behavior induced by larval acan-thocephalans.
The research team sent traps underwater to catch the tiny prawn-like amphipods
and tested them.
The feeding habits of shredders such as amphipods
are dependent upon the quantity, timing, and quality of organic debris input into the stream (Anderson and Sedell, 1979; FeRoy and Marks, 2006).
The numerically dominant epifauna collected from clam nets in Virginia were amphipods
Gammarus mucronatus (Say, 1818) and Melita sp.; a decapod the broke-backed shrimp; and two small gastropods the black-lined triphora Marshallora nigrocincta (Adams, 1839) and the lunar dove snail Astyris lunata (Say, 1826).
Boulders with filamentous algae in the experiment served as an object of grazing for the palaemonid prawns and gammarid amphipods
and as a refuge for gammarids.
Orange-shelled creatures called amphipods
also drifted by.
These tiny white crustaceans, now called Model Cave amphipods
or White Pine amphipods
, live in cool, clear groundwater and have, to date, only been found in two pools in this single cave.
As well as documenting new species, the team brought back incredible footage of the first supergiant amphipods
ever to be filmed alive - showing the crustaceans swimming, feeding and fending off would-be predators with their large body size and protective tails.
Lake Nhlange had a community dominated by polychaetes, chironomid larvae, amphipods
and the bivalve Brachidontes virgiliae (Barnard, 1964).