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Villarroel, MorrisAuthorTorrent, FernandoAuthor

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January 13, 2020
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Fasting combined with long catch duration modifies the physio-metabolic response and flesh quality of rainbow trout

Publicated to: AQUACULTURE RESEARCH. 51 (3): 1244-1255 - 2020-03-01 51(3), DOI: 10.1111/are.14475

Authors:

Bermejo-Poza, R; Villarroel, M; Pérez, C; de Chavarri, EG; Díaz, MT; Torrent, F; De la Fuente, J
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Affiliations

INIA, Dept Food Technol - Author
Tech Univ Madrid, Dept Anim Sci, Coll Agr Engn - Author
Tech Univ Madrid, Dept Forestry & Fisheries, Coll Forestry Engn - Author
Univ Complutense Madrid, Sch Vet, Dept Anim Prod, Ave Puerta de Hierro S-N - Author
Univ Complutense Madrid, Sch Vet, Dept Physiol - Author
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Abstract

Pre-slaughter handling involves fasting fish and catching them, which can affect fish welfare and flesh quality, but few studies have considered their combined effects. In this study, adult rainbow trout (320 +/- 10 g average weight) were fasted for 7 days (135.6 degree days) and subjected to a long catch duration (20 min), compared with controls (no fasting or short catch duration). Condition factor, organ weight indexes and carcass yield decreased with fasting but not catch duration. Plasma concentrations of cortisol, glucose and lactate increased after a long catch, while plasma triglycerides decreased with fasting. Liver glycogen concentration was lower in fasted fish, and liver luminosity and chroma were higher after fasting with a long catch. Regarding flesh quality, rigor mortis resolved more slowly and final muscle pH at 48 hr post-mortem was higher for fasted fish with a long catch time. Muscle glycogen concentration was higher in fasted fish, where chroma was also lower. Fasted fish had lower lipid oxidation, but there were no differences in fat content in muscle. Fasted fish with a long catch duration also had less monounsaturated and more saturated fatty acids. In conclusion, a long catch triggered a stress response that had negative effects on flesh quality, independently of fasting.
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Keywords

Atlantic codCortisolFastFatty-acidsFillet compositionFlesh qualityHandling stressHarvesting methodMuscle glycogenOncorhynchus-mykissPlasma growth-hormonePre-slaughterRainbow troutSeabream sparus-aurataStarvationStress response

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal AQUACULTURE RESEARCH due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2020, it was in position 24/55, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Fisheries. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Aquatic Science.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-27:

  • WoS: 6
  • Scopus: 8
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-27:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 19 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/86996/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 152
  • Downloads: 57
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Awards linked to the item

Ministerio de Economia y Competitividad, Grant/Award Number: AGL2010-19479
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