Effect of environmental salinity manipulation on uptake rates and distribution patterns of waterborne amino acids in the Pacific hagfish

Chris N. Glover, Tamzin A. Blewett, Chris M. Wood

Research output: Contribution to journalJournal Articlepeer-review

4 Citations (Scopus)

Abstract

Among vertebrates, hagfish are the only known iono- and osmoconformers, and the only species thus far documented to absorb amino acids directly across the skin. In the current study, short-term (6 h) manipulations of exposure salinities (75–125% seawater) were conducted to determine whether changes in osmotic demands influenced the uptake and tissue distribution of waterborne amino acids (alanine, glycine and phenylalanine), in the Pacific hagfish, Eptatretus stoutii. No changes in erythrocyte or muscle amino acid accumulation rates were noted, but the patterns of plasma amino acid accumulation were suggestive of regulation. Contrary to expectations, glycine transport across the skin in vitro was enhanced in the lowest exposure salinity, but no other salinity-dependent changes were demonstrated. Overall, this study indicates that uptake and distribution of amino acids varies with salinity, but not in a manner that is consistent with a role for the studied amino acids in maintaining osmotic balance in hagfish.

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalComparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
Volume204
DOIs
Publication statusPublished - 1 Feb. 2017

Keywords

  • Amino acid
  • Cell volume regulation
  • Dissolved organic carbon
  • Hagfish
  • Nutrition
  • Osmoconformer
  • Osmolyte
  • Osmoregulation
  • Salinity

Fingerprint

Dive into the research topics of 'Effect of environmental salinity manipulation on uptake rates and distribution patterns of waterborne amino acids in the Pacific hagfish'. Together they form a unique fingerprint.

Cite this