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dc.contributor.authorHouston, S.
dc.date.accessioned2019-05-15T15:12:54Z
dc.date.available2019-05-15T15:12:54Z
dc.date.issued2013
dc.identifier.citation

Houston, S. (2013) 'Osmotic regulation of the amphipod Gammarus chevreuxi (Sexton, 1912)', The Plymouth Student Scientist, 6(1), p. 104-118.

en_US
dc.identifier.issn1754-2383
dc.identifier.urihttp://hdl.handle.net/10026.1/14011
dc.description.abstract

This study investigated osmotic regulation in the amphipod, Gammarus chevreuxi, and is the first publication of this organism’s osmotic regulatory curves. Unlike most estuarine amphipods studied to date which are hyperosmotic regulators, G. chevreuxi is a hyper-hyposmotic regulator. The hyperosmotic gradient maintained by G. chevreuxi in dilute media is very low (~120mmol.L-1), which has been interpreted as evidence of freshwater ancestry among the Crustacea. Salinity acclimation did not appear to affect heart rate or pleopod beat frequency. The gill cells responsible for ion uptake appeared to be smaller in high salinities or distorted. The apical membrane in concentrated media shows signs of damage beneath the cuticle. These findings demonstrate strong osmoregulatory ability in G. chevreuxi and suggest descent from a freshwater lineage of amphipods.

en_US
dc.language.isoenen_US
dc.publisherUniversity of Plymouth
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.subjectOsmoregulationen_US
dc.subjectIon Regulationen_US
dc.subjectGammarus Chevreuxien_US
dc.subjectGill Ultrastructureen_US
dc.subjectHaemolymphen_US
dc.subjectSodiumen_US
dc.subjectCalciumen_US
dc.subjectMagnesiumen_US
dc.subjectSalinity Acclimationen_US
dc.subjectHeart Rateen_US
dc.titleOsmotic regulation of the amphipod Gammarus chevreuxi (Sexton, 1912)en_US
dc.typeArticle
plymouth.issue1
plymouth.volume6
plymouth.journalThe Plymouth Student Scientist


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