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Autoradiographic confirmation of mucus-mediated absorption in the halfbeak Hyporhamphus regularis ardelio (Whitley, 1931)

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Abstract:

In an investigation of the relationship between acidic glycoproteins released in the pharynx and oesophagus of Hyporhamphus regularis ardelio and ‘juice’ released from Zostera capricorni by pharyngeal milling, autoradiographs of thin sections of guts of fish fed C14 labelled seagrass leaves revealed high emission densities in the acidic glycoprotein sheath surrounding the ingesta. This indicates that ‘juice’ liberated from seagrass is taken up by the mucus.

Keywords: Hemiramphidae; autoradiography; glycoprotein; herbivory; mucous sheath

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1095-8649.2007.01325.x

Affiliations: Centre for Marine Studies, The University of Queensland, Brisbane, St Lucia, Queensland 4072, Australia

Publication date: February 1, 2007

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