| Calanoides acutus | |
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| Species: | C. acutus |
| Binomial name | |
| Calanoides acutus (Giesbrecht, 1902) | |
Calanoides acutus is a copepod found in Antarctica and the surrounding waters.
The female ranges from about 3.5 to 5.7 millimetres (0.14 to 0.22 in), and the male has an average length of about 4.6 millimetres (0.18 in). [1]
C. acutus is found in Antarctic and sub-Antarctic waters, from sea level to 1,000 metres (3,300 ft) in depth. [1]
While C. acutus is only confirmed to breed from November to March, [2] it likely starts breeding in early October, as a study observed females without eggs and late-stage nauplii presumably belonging to this copepod in mid-November. [3] Stage I through III copepodites are generally found from sea level to 100 metres (330 ft) of depth. Older stages, on the other hand, are found in the top 200 metres (660 ft) during the summer, except during December, when they are found in the top 100 metres (330 ft). [4] C. acutus starts to descend in February, although this is affected by the food supply, with individuals in the northern portion of the range, like in Drake Passage, only starting to winter during mid-March. [5] Individuals, mainly stage IV and V copepodites, [4] winter to between about 500 and 1,000 metres (1,600 and 3,300 ft). [5] There is no evidence of diel vertical migration in this species. [3]
The Antarctic silverfish, or Antarctic herring, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean and the only truly pelagic fish in the waters near Antarctica. It is a keystone species in the ecosystem of the Southern Ocean.
Acartia hudsonica is a species of marine copepod belonging to the family Acartiidae. Acartia hudsonica is a coastal, cold water species that can be found along the northwest Atlantic coast.
Acartia tonsa is a species of marine copepod in the family Acartiidae.
Calanus hyperboreus is a copepod found in the Arctic and northern Atlantic. It occurs from the surface to depths of 5,000 metres (16,000 ft).
Calanus pacificus is a species of copepod found in the Pacific Ocean. The female has an average length of about 3.1 millimetres (0.12 in), and the male has a value of about 2.9 millimetres (0.11 in).
Calanus propinquus is a copepod found in Antarctica, and the surrounding waters.
Metridia longa is a copepod found in the Arctic, the north Atlantic, the Pacific, and surrounding waters. The female has an average length of about 4.2 millimetres (0.17 in), and the males have an average length of about 3.5 millimetres (0.14 in).
Neocalanus plumchrus is a large species of copepod found in the Pacific and Arctic Oceans. It was described in 1921 H. by Marukawa. N. flemingeri was formerly considered as conspecific, likely as a form, until it was split in 1988 by Charles B. Miller.
Neocalanus cristatus is a species of copepod found primarily in the northern Pacific.
Metridia pacifica is a copepod found in the north Pacific and surrounding waters.
Eucalanus bungii is a copepod found in the north Pacific and surrounding waters.
Pseudocalanus newmani is a copepod found in Arctic and northern Pacific waters. It was described by Frost in 1989. It is found in the Arctic and surrounding waters. There are multiple generations. Unlike some copepods, P. newmani undergoes reverse diel vertical migration, descending during the night, and ascending during the day, although it may undergo normal or no migration at all depending on predation. This copepod is primarily herbivorous.
Calanus sinicus is a copepod found in the northwest Pacific.
Rhincalanus gigas is a large Antarctic copepod.
Rhincalanus nasutus is a copepod in the family Rhincalanidae.
Temora stylifera is a copepod primarily found in the Atlantic and surrounding waters.
Metridia gerlachei is a copepod found primarily in Antarctic and sub-Antarctic waters.
Pseudocalanus minutus is a small copepod found in the Arctic Ocean and surrounding waters.
Euchaetidae is a family of marine copepods. The family is cosmopolitan and occurs in all the oceans, including the Southern and Arctic Oceans. Euchaetidae are medium to large-sized copepods.
Callianira antarctica is a species of ctenophore that physically resembles Mertensia ovum, but lacks the oil sacs. Just like other ctenophores, over 95% of its body mass and composition is water.
| Authority control databases: National |
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