Salt gland blood flow in the hatchling green turtle, Chelonia mydas
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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.author | Reina, R | |
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dc.date.accessioned | 2015-12-13T23:15:25Z | |
dc.identifier.issn | 0174-1578 | |
dc.identifier.uri | http://hdl.handle.net/1885/88882 | |
dc.description.abstract | 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 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.publisher | Springer | |
dc.source | Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology | |
dc.subject | Keywords: 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.title | Salt gland blood flow in the hatchling green turtle, Chelonia mydas | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 170 | |
dc.date.issued | 2000 | |
local.identifier.absfor | 060603 - Animal Physiology - Systems | |
local.identifier.ariespublication | MigratedxPub18746 | |
local.type.status | Published Version | |
local.contributor.affiliation | Reina, R, College of Medicine, Biology and Environment, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.startpage | 573 | |
local.bibliographicCitation.lastpage | 580 | |
local.identifier.doi | 10.1007/s003600000136 | |
dc.date.updated | 2015-12-12T08:43:25Z | |
local.identifier.scopusID | 2-s2.0-0034526529 | |
Collections | ANU Research Publications |
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