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Salt gland blood flow in the hatchling green turtle, Chelonia mydas

Reina, R

Description

Microsphere and morphometric techniques were used to investigate any circulatory changes that accompany secretion by the salt glands of hatchling Chelonia mydas. Salt glands were activated by a salt load of 27.0 mmol NaCl kg body mass (BM)-1, resulting in a mean sodium secretion rate of 4.14 ± 0.11 mmol Na kg BM-1 h-1 for a single gland. Microsphern entrapment was approximately 160-180 times greater in the active salt gland than the inactive gland, inferring a similar change in blood flow...[Show more]

dc.contributor.authorReina, R
dc.date.accessioned2015-12-13T23:15:25Z
dc.identifier.issn0174-1578
dc.identifier.urihttp://hdl.handle.net/1885/88882
dc.description.abstractMicrosphere and morphometric techniques were used to investigate any circulatory changes that accompany secretion by the salt glands of hatchling Chelonia mydas. Salt glands were activated by a salt load of 27.0 mmol NaCl kg body mass (BM)-1, resulting in a mean sodium secretion rate of 4.14 ± 0.11 mmol Na kg BM-1 h-1 for a single gland. Microsphern entrapment was approximately 160-180 times greater in the active salt gland than the inactive gland, inferring a similar change in blood flow through salt gland capillaries. The concentration of microspheres trapped in the salt gland was significantly correlated with the rate of tear production (ml kg BM-1 h-1) and the total rate of sodium secretion (mmol Na kg BM-1 h-1 but not with tear sodium concentration (mmol Na 1-1). Adrenaline (500 μg kg BM-1) inhibited tear production within 2 min and reduced microsphere entrapment by approximately 95% compared with active glands. The volume of filled blood vessels increased from 0.03 ± 0.01% of secretory lobe volume in inactive salt gland sections to 0.70 ± 0.11% in active gland sections. The results demonstrate that caspillary blood flow in the salt gland of C. mydas can regulate the activity of the gland as a whole.
dc.publisherSpringer
dc.sourceJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
dc.subjectKeywords: adrenalin; microsphere; sodium; sodium chloride; animal; article; blood flow; capillary; cytology; drug effect; histology; lacrimal fluid; metabolism; physiology; salt gland; secretion; turtle; vascularization; Animals; Capillaries; Epinephrine; Microsphe Blood flow; Chelonian; Microsphere; Osmoregulation; Salt glands
dc.titleSalt gland blood flow in the hatchling green turtle, Chelonia mydas
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume170
dc.date.issued2000
local.identifier.absfor060603 - Animal Physiology - Systems
local.identifier.ariespublicationMigratedxPub18746
local.type.statusPublished Version
local.contributor.affiliationReina, R, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage573
local.bibliographicCitation.lastpage580
local.identifier.doi10.1007/s003600000136
dc.date.updated2015-12-12T08:43:25Z
local.identifier.scopusID2-s2.0-0034526529
CollectionsANU Research Publications

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