Changes in chloride secretion rate and vascular perfusion in the rectal gland of the European lesser-spotted dogfish in response to environmental and hormonal stimuli

WG Anderson, JP Good, Neil Hazon

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Chloride secretion rates of rectal glands taken from the European lesser-spotted dogfish Scyliorhinus canicula adapting to 70% and 120% sea water (SW) were significantly greater and less than, respectively, those in the control 100% SW group. C-type natriuretic peptide (CNP) significantly increased chloride secretion rates above basal values in 100% SW although angiotenisn 11 (ANG 11) had no effect. Perfusion of the secretory epithelia in rectal glands from 70% SW lesser-spotted dogfish was significantly higher than in rectal glands from 100% and 120% SW lesser-spotted dogfish. Perfusion of rectal glands with ANG 11 had no effect on perfusion of the secretory epithelia, although CNP perfusion induced significantly greater perfusion of the secretory epithelia than all other treatments. It remains to be determined if a reduction in environmental salinity induces an increase in plasma concentration of CNP and hence an increase in rectal gland activity. (C) 2002 The Fisheries Society of the British Isles. Published by Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1580 - 1590
Number of pages11
JournalJournal of Fish Biology
Volume60
DOIs
Publication statusPublished - Jun 2002

Keywords

  • rectal gland
  • elasmobranchs
  • environmental acclimation
  • CNP
  • ANG II
  • SQUALUS-ACANTHIAS
  • NATRIURETIC PEPTIDES
  • ELASMOBRANCH FISH
  • SHARK

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