Intestinal transport processes in marine fish osmoregulation

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

This chapter focuses on intestinal water absorption that is ultimately linked to salt absorption. The gastrointestinal tract was recognized early to play a vital role in marine teleost osmoregulation by absorbing water. The esophagus and the intestine of marine fish contribute in functionally distinct ways to marine teleost osmoregulation. Despite the obvious influence of feeding on intestinal transport processes associated with osmoregulation, only a minor disturbance of salt and water balance was evident from plasma osmolality and ionic composition. Water loss to the marine environment is inevitable through renal excretion and non-renal loss, most of which is likely to occur across the gill surface. The intestinal epithelium provides for osmoregulation by absorbing water. Urotensin II is secreted from the urophysis at rates responding to external salinities with circulating levels being higher in seawater-than in freshwater-adapted fish, suggesting a role in water retention.

Original languageEnglish (US)
Title of host publicationFish Osmoregulation
PublisherCRC Press
Pages333-357
Number of pages25
ISBN (Electronic)9781439843116
ISBN (Print)9781578084470
DOIs
StatePublished - Jan 1 2019

Fingerprint

Osmoregulation
osmoregulation
marine fish
Fish
Fishes
Water
water
salts
Salts
osmolality
esophagus
intestinal mucosa
marine environment
water balance
water uptake
gastrointestinal system
Water absorption
gills
intestines
Seawater

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Intestinal transport processes in marine fish osmoregulation. / Grosell, Martin.

Fish Osmoregulation. CRC Press, 2019. p. 333-357.

Research output: Chapter in Book/Report/Conference proceedingChapter

Grosell, Martin. / Intestinal transport processes in marine fish osmoregulation. Fish Osmoregulation. CRC Press, 2019. pp. 333-357
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