Swarming of Hyperiid Amphipods

Gray, J. S.; McHardy, R. A.

doi:10.1038/215100a0

Cited by 9 publications

(6 citation statements)

References 5 publications

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“…In Arctic Kongsfjorden where a year-round presence of T. libellula has been recorded, mature females have never been caught, however, juveniles are found in high abundances (Noyon et al, 2011). Vast numbers of T. compressa (then: Parathemisto gaudichaudii) were found washed upon the shore of Northeast England, turning the beaches white, which consisted of females carrying young, eggs, and many recently hatched juveniles (Gray & McHardy, 1967). These examples may corroborate other previous findings (Labat et al, 2005;Noyon et al, 2011) that females release their brood nearshore, entering bays or fjords and subsequently leaving these "nursery" areas.…”

Section: Local and Regional Segregation Of Juveniles Males And Femalesmentioning

confidence: 99%

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

Havermans

Auel

Hagen

et al. 2019

Advances in Marine Biology

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Hyperiid amphipods are predatory pelagic crustaceans that are particularly prevalent in high-latitude oceans. Many species are likely to have co-evolved with soft-bodied zooplankton groups such as salps and medusae, using them as substrate, for food, shelter or reproduction. Compared to other pelagic groups, such as fish, euphausiids and soft-bodied zooplankton, hyperiid amphipods are poorly studied especially in terms of their distribution and ecology. Hyperiids of the genus Themisto, comprising seven distinct species, are key players in temperate and cold-water pelagic ecosystems where they reach enormous levels of biomass. In these areas, they are important components of marine food webs, and they are major prey for many commercially important fish and squid stocks. In northern parts of the Southern Ocean, Themisto are so prevalent that they are considered to take on the role that Antarctic

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Section: Local and Regional Segregation Of Juveniles Males And Femalesmentioning

confidence: 99%

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

Havermans

Auel

Hagen

et al. 2019

Advances in Marine Biology

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“…Several thousand specimens of Parathemisto were available at the Dove Marine Laboratory, Northumberland, collected in the period 17-23 January 1935, when large numbers were stranded oh the shore there. Fifty specimens of P. gaudichaudi were obtained from a stranding on the Yorkshire coast which took place in June 1966 (Gray & McHardy, 1967). Samples of Parathemisto provided by Fiskeridirektoratets Havforskningsinstitutt, Norway, contained some specimens of P. gaudichaudi.…”

Section: A T E R I a L S And M E T H O D Smentioning

confidence: 99%

The taxonomic relationship of Parathemisto gaudichaudi (Guerin) and P. gracilipes (Norman), with a key to the genus Parathemisto

Sheader¹,

Evans

1974

J. Mar. Biol. Ass.

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The results of morphometric and developmental studies made to elucidate the relationship between Parathemisto gaudichaudi (Guerin) and P. gracilipes (Norman) show them to be one and the same species. Apparent differences are due to differences in the size of specimens at maturity, and to the degree of development of the bispinosa-compressa condition. P. gaudichaudi takes precedence over P. gracilipes.The species is highly variable, existing in two extreme forms, the bispinosa form and the compressa form, together with all possible intermediates. The full range of the bispinosa-compressa condition is not expressed until a body-length of 10 mm is reached. Specimens are capable of changing towards either extreme at moults, but the factors causing the change are unknown.A key to the genus Parathemisto Boeck is included.

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“…In a few stations, we found a nonconstant relationship between densities and biomasses calculated from the 2 successive hauls performed within a few minutes on the same day (see 'Methods'). The most likely explanation was the swarming behaviour of the genus Themisto (Gray & McHardy 1967, Vinogradov et al 1996) that may induce differences in the amount of individuals collected in net samples.…”

Section: Themisto Gaudichaudii From Macrozooplankton Net Samplesmentioning

confidence: 99%

Amphipod-based food web: Themisto gaudichaudii caught in nets and by seabirds in Kerguelen waters, southern Indian Ocean

Bocher¹,

Cherel²,

Labat³

et al. 2001

Mar. Ecol. Prog. Ser.

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Swarming of Hyperiid Amphipods

Cited by 9 publications

References 5 publications

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

The taxonomic relationship of Parathemisto gaudichaudi (Guerin) and P. gracilipes (Norman), with a key to the genus Parathemisto

Amphipod-based food web: Themisto gaudichaudii caught in nets and by seabirds in Kerguelen waters, southern Indian Ocean

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