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IONIC REGULATION AND BUOYANCY IN SOME PLANKTONIC ORGANISMS

NEWTON, C and Potts, William (1993) IONIC REGULATION AND BUOYANCY IN SOME PLANKTONIC ORGANISMS. Journal of the Marine Biological Association of the United Kingdom, 73 (1). pp. 15-23.

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Abstract

Magnesium/chlorine and sulphur/chlorine ratios have been measured in the body fluids of some planktonic organisms by x-ray emission analysis of frozen hydrated specimens in a scanning electron microscope. Homarus vulgaris (Anthropoda: Decapoda) larVae excluded Mg2+ and SO42- ions from the haemolymph, but to a lesser extent than does the adult lobster. Bipinnaria larvae of Asterias (Echinodermata) excluded Mg2+ and SO42- ions from the coelomic fluid. Obelia medusae excluded Mg2+ and SO42- ions from the mesogloea but concentrate them in the gastrovascular system. The high concentration of sulphate in the gastrovascular fluid of medusae has been confirmed by rhodizonate titration in Cyanea and Rhizostoma jellyfish. Some implications of magnesium and sulphate regulation are discussed.

Item Type: Article
Journal or Publication Title: Journal of the Marine Biological Association of the United Kingdom
Additional Information: Online version available from 1999 on.
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 22659
Deposited By: ep_ss_importer
Deposited On: 21 Jan 2009 14:10
Refereed?: No
Published?: Published
Last Modified: 22 Jun 2016 01:04
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/22659

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