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

Macronutrient self-selection through demand-feeders in rainbow trout.

F J Sánchez-Vázquez1, T Yamamoto, T Akiyama

  • 1Department of Physiology and Pharmacology, Faculty of Biology, University of Murcia, Spain. javisan@cu.um.es

Physiology & Behavior
|May 1, 1999
PubMed
Summary

Rainbow trout can self-select a balanced diet from protein, fat, and carbohydrate options, showing a preference for protein. This research offers insights into fish nutrition and feeding regulation.

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

The daily rhythms of temperature preference are conserved in nocturnal and blind fish.

Journal of thermal biology·2025
Same author

Circadian temperature rhythm in breeding sows: differences between days in oestrus and anoestrus after weaning.

Porcine health management·2024
Same author

Impact of Daylight Saving Time on circadian timing system: An expert statement.

European journal of internal medicine·2019
Same author

Circadian monitoring as an aging predictor.

Scientific reports·2018
Same author

Impact of a shift work-like lighting schedule on the functioning of the circadian system in the short-lived fish Nothobranchius furzeri.

Experimental gerontology·2018
Same author

Heritability of siesta and night-time sleep as continuously assessed by a circadian-related integrated measure.

Scientific reports·2017

Area of Science:

  • Aquaculture
  • Animal Nutrition
  • Fish Physiology

Background:

  • Understanding fish feeding behavior is crucial for optimizing aquaculture diets and management.
  • Rainbow trout (Oncorhynchus mykiss) are a key species in global aquaculture, necessitating research into their nutritional requirements.

Purpose of the Study:

  • To evaluate the capacity of rainbow trout to self-select macronutrients from pure protein, fat, and carbohydrate diets.
  • To identify rainbow trout's macronutrient preferences and feeding patterns when given dietary choices.

Main Methods:

  • Twelve rainbow trout were housed individually and provided with three distinct self-feeders, each containing a single macronutrient diet (protein, fat, or carbohydrate).
  • Fish were maintained at a constant temperature (14°C) to control environmental variables affecting feeding behavior.

Related Experiment Videos

Main Results:

  • Rainbow trout successfully composed a balanced diet through self-selection, demonstrating a clear preference for protein over fat and carbohydrate.
  • Food intake was regulated to balance energy, supporting consistent growth.
  • Trout exhibited a strict diurnal feeding rhythm with an endogenous period ranging from 18.2 to 27.7 hours.

Conclusions:

  • Rainbow trout possess the ability to self-regulate their macronutrient intake based on distinct dietary components.
  • Findings provide valuable data for designing effective fish diets and understanding feeding regulation mechanisms in aquaculture.