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Biology

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

Trophic Strategy

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

Description

provided by iArczoo

Front part of the body has a bright red color

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Ershova, Elizaveta
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Distribution

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

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Ershova, Elizaveta
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Habitat

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

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cc-by-3.0
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Ershova, Elizaveta
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Morphology

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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.

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Ershova, Elizaveta
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Reproduction

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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.

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Size

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

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Ershova, Elizaveta
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Trophic Strategy

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Opprotunistic omnivores; studies suggest that diet is primarily carnivorous

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Gaetanus brevispinus ( Italian )

provided by wikipedia IT

Il Gaetanus brevispinus è una specie di crostaceo del genere Gaetanus, dell'ordine dei Calanoida. Fa parte dello zooplancton[2], ed è un predatore che si ciba prevalentemente di altri copepodi[3]

Habitat e distribuzione

Si tratta di una specie cosmopolita, ma che si trova principalmente nelle acque basse in vicinanza dei poli[4], ed in particolare nell'oceano artico, tra la superficie e i 1.500 metri di profondità, con la maggior concentrazione tra i 100 e i 750 metri[3]. Più lontano dai poli lo si trova a profondità maggiori, di 3.000 metri[4], in particolare lungo la corrente termoalina[5].

Descrizione

Sono caratterizzati da spine lungo tutto il corpo. La parte anteriore e l'apparato digerente sono di un rosso acceso. Il corpo delle femmine è lungo tra i 3,6 e i 4,9 millimetri, mentre quello dei maschi tra i 2,3 e i 4,1.[3] Oltre ad essere più piccoli, i maschi hanno anche spine posteriori più ridotte.[2] La coda è lunga circa un terzo del corpo, mentre le antenne sono lunghe quanto il corpo o di più[3].

Note

  1. ^ (EN) Gaetanus brevispinus - Species Card - Marine Planktonic Copepods, su copepodes.obs-banyuls.fr.
  2. ^ a b (EN) Gaetanus brevispinus, su species-identification.org. URL consultato il 22 marzo 2010.
  3. ^ a b c d (EN) Gaetanus brevispinus (Sars, 1900), su arcodiv.org. URL consultato il 22 marzo 2010.
  4. ^ a b Stessa specie, poli opposti - Gaetanus Brevispinus, su lescienze.espresso.repubblica.it. URL consultato il 22 marzo 2010.
  5. ^ (EN) Same Species, Polar Opposites: The Mystery of Identical Creatures Found in both Arctic and Antarctic Waters , su web2.scientificamerican.com. URL consultato il 22 marzo 2010.

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Gaetanus brevispinus: Brief Summary ( Italian )

provided by wikipedia IT

Il Gaetanus brevispinus è una specie di crostaceo del genere Gaetanus, dell'ordine dei Calanoida. Fa parte dello zooplancton, ed è un predatore che si ciba prevalentemente di altri copepodi

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Gaetanus brevispinus ( Dutch; Flemish )

provided by wikipedia NL

Gaetanus brevispinus is een eenoogkreeftjessoort uit de familie van de Aetideidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1900 door Sars G.O..

Bronnen, noten en/of referenties
  1. Kouwenberg, J. (2012). Gaetanus brevispinus (Sars G.O., 1900). In: Walter, T.C., Boxshall, G. (2012). World Copepoda database. Geraadpleegd via: World Register of Marine Species op http://www.marinespecies.org/aphia.php?p=taxdetails&id=254602
Geplaatst op:
18-03-2013
Dit artikel is een beginnetje over biologie. U wordt uitgenodigd om op bewerken te klikken om uw kennis aan dit artikel toe te voegen. Beginnetje
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Depth range

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