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Biology

provided by Arctic Ocean Biodiversity 2011
A common midwater copepod of the Arctic
license
cc-by-nc
copyright
Arctic Ocean Diversity
author
Russ Hopcroft

Comprehensive Description

provided by Arctic Ocean Biodiversity 2011
Anterior body and digestive track strongly red colored; Posterior corners of prosome (body) with moderate spine; Urosome (tail) ~ 1/3 prosome; Antennae equal to or longer than total length; Mouth parts and antennae typcial of a predator
license
cc-by-nc
copyright
Arctic Ocean Diversity
author
Russ Hopcroft

Habitat

provided by Arctic Ocean Biodiversity 2011
Cosmopolitan in deep waters, but most common in polar waters; In the Arctic, range from near surface to 1500m, with peak depth between 100 and 750m; In mid-latitudes generally much deeper, down to 3000 m
license
cc-by-nc
copyright
Arctic Ocean Diversity
author
Russ Hopcroft

Trophic Strategy

provided by Arctic Ocean Biodiversity 2011
Predatory on other zooplankton, primarily other copepods
license
cc-by-nc
copyright
Arctic Ocean Diversity
author
Russ Hopcroft

Life Cycle

provided by Arctic Ocean Biodiversity 2011
In the Arctic, females spawn 2-6 large eggs, likely only once per season; Life expectancy unknown, potentially 2-3 years
license
cc-by-nc
copyright
Arctic Ocean Diversity
author
Russ Hopcroft

Description

provided by iArczoo

Front part of the body has a bright red color

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Distribution

provided by iArczoo

Central Arctic Basin, North Atlantic, Sea of Japan, Se of Okhotsk, Bering Sea, North-Western Pacific

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Habitat

provided by iArczoo

Oceanic, bathypelagic species. In the Pacific occurs at depths less than 200m, in the Arctic can be found at the surface

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Morphology

provided by iArczoo

Females:
Body plump and does not narrow towards the bottom, top of the head flattened. Rostrum widens at the base has a deep crevice on the top. Head fused with the thorax, 2 last segments separate. Spines on the last thoracic segment short, thin and face straight backward. A1 reach the back edge of the second abdominal segment, the endopodite of A2 is shorter than the outer branch by 0.25 of its length. Exopodite of P1 three-segmented, endopodite of P2 two-segmented. Mxp2 has a lateral plate. The basipodite of P4 carries 20-24 narrow, long spines. Abdomen 3.5 times shorter than the cephalothorax. The genital segment is equal in length to the next 3 segments combined, the back side of all abdominal segments carry small serrations.

Males:
Smaller and more slender than the female. A1 reach the first third of the second abdominal segment. Rostrum does not widen as much at the base. The spines on the last thoracic segment have the same structure as in females, but they are not separated from the segment. The left endopodite of P5 relatively short, it is equal in length to 2/3 of the first segment of the exopodite of the same branch.

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Reproduction

provided by iArczoo

Broadcast spawners (release eggs freely into the water), usually 2-6 eggs per spawning event. Eggs possess 2 membranes with a perivitelline space between them.

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Size

provided by iArczoo

Females: 3.60-4.90 mm
Males: 2.08-4.00 mm

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Trophic Strategy

provided by iArczoo

Opprotunistic omnivores; studies suggest that diet is primarily carnivorous

license
cc-by-3.0
compiler
Ershova, Elizaveta
partner site
iArczoo

Depth range

provided by World Register of Marine Species
meso-bathypelagic, hadopelagic
license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
Kouwenberg, Juliana [email]
contributor
Kouwenberg, Juliana [email]