Haemolymph glucose concentrations of juvenile rock lobsters, Jasus edwardsii, feeding on different carbohydrate diets

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dc.contributor.author Radford, Craig en
dc.contributor.author Marsden, ID en
dc.contributor.author Davison, W en
dc.contributor.author Taylor, HH en
dc.date.accessioned 2013-12-20T01:53:12Z en
dc.date.issued 2005 en
dc.identifier.citation Comparative Biochemistry and Physiology A-Molecular and Integrative Physiology 140(2):241-249 2005 en
dc.identifier.issn 1095-6433 en
dc.identifier.uri http://hdl.handle.net/2292/21326 en
dc.description.abstract Postprandial changes in haemolymph glucose concentration ([Glc]H) were measured in 4-day-fasted juvenile intermoult spiny lobsters, Jasus edwardsii, provided with meals composed of glycogen, maltose, sucrose, glucose, or fructose in a gelatine base, or with gels of the algal glycans agar, alginate and carrageenan. Baseline [Glc]H was 0.61±0.02 mmol L−1. After consumption of glycogen, maltose or sucrose, [Glc]H approximately doubled, peaked after 3 h and returned to baseline between 12 and 24 h. Glucose and fructose meals were followed by periods of sustained hyperglycaemia lasting more than 24 h (peaking at ∼2.5 times baseline at 6 and 3 h respectively). Suggested explanations for augmented hyperglycaemic responses to glucose and fructose are: 1) these monosaccharides by-passed contact digestion and absorption in the R-cells of the digestive gland, directing them away from storage and toward transepithelial scavenging routes; or 2) glucose and fructose directly elicited release of crustacean hyperglycaemic hormone via a chemosensory reflex. Agar and alginate induced significant postprandial glycaemic responses, consistent with reports of carbohydrases in this species and indicating their potential for inclusion in artificial diets as both binders and energy sources. Carrageenan, a highly sulphated galactan, did not produce a glycaemic response. The measurement of glycaemic responses is a quick method of obtaining nutritional information on carbohydrates considered for inclusion in formulated diets prior to lengthy growth trials. en
dc.relation.ispartofseries Comparative Biochemistry and Physiology A-Molecular and Integrative Physiology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy#published-journal-article http://www.sherpa.ac.uk/romeo/issn/1095-6433/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Haemolymph glucose concentrations of juvenile rock lobsters, Jasus edwardsii, feeding on different carbohydrate diets en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.cbpb.2005.01.002 en
pubs.issue 2 en
pubs.begin-page 241 en
pubs.volume 140 en
pubs.end-page 249 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 88559 en
pubs.org-id Science en
pubs.org-id Marine Science en
dc.identifier.eissn 1531-4332 en
pubs.record-created-at-source-date 2010-09-01 en

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