Physio-metabolic response of rainbow trout during prolonged food deprivation before slaughter

Bermejo Poza, R. and Fernández Muela, Montserrat and Fuente, Jesús de la and Pérez, Concepción and González de Chavarri, Elisabet and Díaz, María Teresa and Torrent Bravo, Fernando and Villarroel Robinson, Morris Ricardo (2019). Physio-metabolic response of rainbow trout during prolonged food deprivation before slaughter. "Fish Physiology and Biochemistry", v. 45 (n. 1); pp. 253-265. ISSN 0920-1742. https://doi.org/10.1007/s10695-018-0559-0.

Description

Title: Physio-metabolic response of rainbow trout during prolonged food deprivation before slaughter
Author/s:
  • Bermejo Poza, R.
  • Fernández Muela, Montserrat
  • Fuente, Jesús de la
  • Pérez, Concepción
  • González de Chavarri, Elisabet
  • Díaz, María Teresa
  • Torrent Bravo, Fernando
  • Villarroel Robinson, Morris Ricardo
Item Type: Article
Título de Revista/Publicación: Fish Physiology and Biochemistry
Date: February 2019
ISSN: 0920-1742
Volume: 45
Subjects:
Freetext Keywords: Food deprivation; Water temperatura; Rainbow trout; Stress response
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (8MB) | Preview

Abstract

Fish normally undergo periods of food deprivation that are longer than non-hibernating mammals. In aquacultured rainbow trout (Oncorhynchus mykiss), it is unclear how fasting may affect their physiological adaptative response, especially when they are normally fed daily. In addition, that response may vary with temperature, making it necessary to express fasting duration in terms of degree days. In the current study, trout were fasted for 5, 10, and 20 days (55, 107, and 200 degree days (°C d), respectively). To assess the physiological response of fish to fasting, different biometric, blood, plasma, and metabolic parameters were measured, as well as liver fatty acid composition. The fish weight, condition factor, and the hepatosomatic index of 5-day fasted trout were not significantly different from those of control fish. Gastric pH increased as fasting progressed while plasma concentrations of glucose, triglycerides, and total proteins decreased significantly after 10 days of fasting, while the percentage of non-esterified fatty acids increased. There were no significant differences in plasma ions (sodium, potassium, and calcium), except for chloride ion which decreased after 5 days of fasting. Liver glycogen decreased after 5 days of fasting while glycogen concentration in muscle did not decrease until 20 days of fasting. Liver color presented a higher chroma after 5 days of fasting, suggesting a mobilization of reserves. Finally, acetylcholinesterase activity in the brain was not affected by food deprivation but increased after 10 days of fasting in liver and muscle, suggesting the mobilization of body reserves, but without severely affecting basal metabolism.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2013-45557-PUnspecifiedUnspecifiedOptimización del manejo final para mejorar el bienestar y la calidad de la carne de trucha

More information

Item ID: 54594
DC Identifier: http://oa.upm.es/54594/
OAI Identifier: oai:oa.upm.es:54594
DOI: 10.1007/s10695-018-0559-0
Official URL: https://link.springer.com/article/10.1007%2Fs10695-018-0559-0
Deposited by: Memoria Investigacion
Deposited on: 22 May 2019 07:31
Last Modified: 01 Mar 2020 23:30
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM