PUBLICATION

Ontogenetic Changes in Blood Osmolality During the Postembryonic Development of Zebrafish (Danio rerio)

Authors
Charmantier, G., Nguyen-Chi, M., Lutfalla, G.
ID
ZDB-PUB-220208-18
Date
2022
Source
Zebrafish   19(1): 1-6 (Journal)
Registered Authors
Lutfalla, Georges
Keywords
nano-osmometry, ontogeny, osmoregulation, teleost, zebrafish
MeSH Terms
  • Animals
  • Larva
  • Osmolar Concentration
  • Zebrafish*/physiology
PubMed
35128940 Full text @ Zebrafish
Abstract
The zebrafish Danio rerio is a teleost model species widely used in developmental genetics, biomedical studies, toxicology, and drug screening. Despite the interest of this species in research, little is known through indirect observations about its blood osmolality, which is a key parameter for diverse experiments. In this study, we directly measured blood osmolality using nano-osmometry at different stages of zebrafish postembryonic development. We found that blood osmolality is close to 240 mOsm·kg-1 in early larvae. It progressively increased to ∼270 mOsm·kg-1 during the larval development before reaching ∼300 mOsm·kg-1 after metamorphosis in juveniles and later in adults. These ontogenetic changes in blood osmolality illustrate the physiological changes in osmoregulation associated with postembryonic development, including metamorphosis. These values are of practical interest for adjusting the osmolality of fixatives and cell and tissue culture media for research using zebrafish as a model.
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