Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Salinity acclimation affects the somatotropic axis in rainbow trout.

Brian S Shepherd1, Katherine Drennon, Jaime Johnson

  • 1National Center for Cool and Coldwater Aquaculture, ARS/USDA, 11861 Leetown Rd., Kearneysville, WV 25430, USA. bshepherd@ncccwa.ars.usda.gov

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|December 18, 2004
PubMed
Summary

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Environmentally Realistic Levels of Total Suspended Solids Damage Gill Structure and Compromise Swimming Performance in Some Freshwater Fish Species.

Biology·2026
Same author

Environmentally Realistic Metal Mixture Concentration Impacts Early Development in Zebrafish Larvae.

Environmental toxicology·2026
Same author

Wild-caught Pacific salmon mothers enhance offspring performance via egg cortisol provisioning.

Proceedings. Biological sciences·2026
Same author

Stable-isotope tracing reveals the role of corticosteroid receptors in driving cortisol-mediated central and peripheral glucose regulation in zebrafish.

Frontiers in endocrinology·2025
Same author

Crhr1 and epinephrine utilize the central Ras-MAPK pathway in mediating the acute stress-related locomotor activity in zebrafish larvae.

Frontiers in endocrinology·2025
Same author

Brain monoamine changes modulate the corticotropin-releasing hormone receptor 1-mediated behavioural response to acute thermal stress in zebrafish larvae.

Molecular and cellular endocrinology·2025

This study shows that gradual salinity exposure increases insulin-like growth factor-binding proteins (IGFBPs) in rainbow trout plasma, suggesting their crucial role in regulating IGF-I during salinity acclimation.

Area of Science:

  • Comparative Physiology
  • Endocrinology
  • Aquaculture

Background:

  • The somatotropic axis plays a role in fish physiology.
  • Understanding ion-regulation mechanisms is vital for aquaculture and fish health.

Purpose of the Study:

  • To investigate the role of the somatotropic axis in ion regulation in rainbow trout.
  • To determine if plasma insulin-like growth factor-binding proteins (IGFBPs) change with gradual salinity exposure.

Main Methods:

  • Freshwater-adapted rainbow trout were gradually exposed to 66% seawater over 5 days.
  • Plasma ion levels (Ca2+, Cl-, Na+), cortisol, growth hormone (GH), IGF-I, and gill Na+-K+-ATPase activity were measured.
  • Plasma IGFBPs (21, 32, 42, and 50 kDa) were identified and quantified.

Related Experiment Videos

Main Results:

  • Salinity exposure led to increased plasma GH, IGF-I, and gill Na+-K+-ATPase activity.
  • Plasma levels of all identified IGFBPs (21, 32, 42, 50 kDa) were elevated in salinity-acclimated fish.
  • Transient changes in specific IGFBP levels were observed during the 5-day acclimation period.

Conclusions:

  • Elevated plasma IGFBPs suggest a significant role in IGF-I regulation during salinity acclimation in salmonids.
  • The somatotropic axis, particularly IGFBPs, is involved in the physiological response to changing salinity environments in rainbow trout.