Ecology

Habitat

Depth range based on 284 specimens in 1 taxon.
Water temperature and chemistry ranges based on 279 samples.

Environmental ranges
  Depth range (m): 0 - 1380
  Temperature range (°C): -1.621 - 12.546
  Nitrate (umol/L): 2.761 - 30.285
  Salinity (PPS): 33.587 - 35.690
  Oxygen (ml/l): 4.518 - 8.084
  Phosphate (umol/l): 0.440 - 1.884
  Silicate (umol/l): 2.068 - 53.999

Graphical representation

Depth range (m): 0 - 1380

Temperature range (°C): -1.621 - 12.546

Nitrate (umol/L): 2.761 - 30.285

Salinity (PPS): 33.587 - 35.690

Oxygen (ml/l): 4.518 - 8.084

Phosphate (umol/l): 0.440 - 1.884

Silicate (umol/l): 2.068 - 53.999
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Themisto gaudichaudii

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There is 1 barcode sequence available from BOLD and GenBank.   Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.  See the BOLD taxonomy browser for more complete information about this specimen.  Other sequences that do not yet meet barcode criteria may also be available.

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNACTCTTTATTTTTTTTTAGGGGTTTGGAGGGGTTTAGTAGGTACGTCTATAAGTACTATTATTCGTATGGAATTAAGTAGTAAAGGTTCTTTATTAGGTGATGATCAGATTTACAATGTTATAGTAACTGGGCATGCTTTTATTATAATTTTTTTTATAGTTATACCTATTATAATTGGTGGATTTGGTAATTGGTTAGTTCCCTTAATATTAGGAAGGGTAGATATAGCTTTTCCTCGTATGAATAATATGAGATTTTGGCTATTAGTACCTTCTTTTATATTGTTAGCTTTAAGAAGTATAGTAGAAAGAGGTGTAGGGGCAGGTTGGACTTTATACCCTCCTTTATCTTCTTCTGTAGGACACAGAGGTTCTGCTGTTGATGTGGCTATTTTTTCTTTACATTTAGCGGGGGTATCTTCTATTTTAGGGGCTATTAATTTTATGACTACTATTTTAAATATACGAAGAAGAGGATTTAAGATATTTTATATAAGATTATTTGTTTGGGCAGTTTTTATCACAGCTATTTTATTATTATTATCTTTACCTGTTTTAGCTGGGGGTATTACTATACTTTTATTAGATCGTAATTTAAATACTTCGTTTTTTAATCCTATAGGAGGGGGGGATCCTGTTTTGTACCAACATTTATTT
-- end --

Download FASTA File
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Themisto gaudichaudii

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Themisto gaudichaudii

Themisto gaudichaudii is an amphipod crustacean of the suborder Hyperiidea.

Relatives[edit]

The 260 species of hyperiid amphipods are large-eyed and planktonic amphipods, whereas gammarid amphipods have smaller eyes and tend to live on the sea floor. The handful of species of the genus Themisto are the most abundant of all amphipods. Unlike other hyperiids, which parasitise gelatinous animals such as salps and jellyfish, Themisto swims free in the plankton, and is much sleeker and more streamlined than other amphipods. Themisto often forms dense swarms, similar to krill swarms.

Themisto gaudichaudii is a voracious predator of anything smaller than itself, and occasionally of animals its own size or larger. In most places, the most abundant members of the plankton community are copepods, which make up the bulk of the diet of T. gaudichaudii, but it also eats fish larvae, chaetognaths, pteropods, juvenile krill, and anything else it comes across. The long limbs are folded against the body for swimming, and extend to catch prey in a similar way to the praying mantis.

Ecology[edit]

T. gaudichaudii is the Southern Ocean species of the genus, ranging through the Antarctic region and further north onto Southern Hemisphere continental shelves. In many places, it is the most abundant predator in the plankton, and is often the third-most abundant member of the plankton community, after copepods and krill.

T. gaudichaudii is an important prey item for predators such as the macaroni penguin and icefish, as well as many species of seabirds, notably diving petrels.

Description[edit]

Adults in the Antarctic are normally 12–21 millimetres (0.47–0.83 in) long, and normally live for a year, although a few may survive to their second year and reach 28 mm (1.1 in) long. Adults off Southern Africa are smaller, reaching 12 mm (0.47 in).

Taxonomic history[edit]

Themisto gaudichaudii was first described by Félix Édouard Guérin-Méneville in 1825. Since the genus was then monotypic, T. gaudichaudii became the type species of the genus Themisto.[1] The type material was collected "sur les côtes des Îles Malouines" (off the coast of the Falkland Islands).[1]

References[edit]

  1. ^ a b James K. Lowry (2003). "Hyperiidae". Crustacea: Malacostraca. Peracarida : Amphipoda, Cumacea, Mysidacea. Volume 19.2B of Zoological catalogue of Australia. CSIRO Publishing. pp. 307–316. ISBN 978-0-643-06902-2. 
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