Impact of photostimulation for delayed maturity on flesh quality of brook trout (Salvelinus fontinalis) stored under refrigerated conditions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F18%3A43897598" target="_blank" >RIV/60076658:12520/18:43897598 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/are.13848" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/are.13848</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/are.13848" target="_blank" >10.1111/are.13848</a>

Result language

angličtina

Original language name

Impact of photostimulation for delayed maturity on flesh quality of brook trout (Salvelinus fontinalis) stored under refrigerated conditions

Original language description

The artificial prolongation of daylight is generally used to delay sexual maturation in many cultured species, mainly in salmonids. This may have a negative impact on flesh quality. Therefore, we aimed to investigate the impact of photostimulation on post-mortem changes; sensory, textural and nutritional characteristics of flesh of brook trout, Salvelinus fontinalis. Farmed brook trout were randomly divided into four experimental groups, according to photoperiod and sex for 112 days. Fish body traits and flesh quality of experimental fish were examined by body weight (g), gonadosomatic, hepatosomatic and perivisceral fat indices (%), rigor index (%), pH changes, fillet contraction (%), gaping, flesh water losses, textural, colour and sensory analyses and finally fat content and fatty acid (FA) composition. The results of pH measurement and rigor mortis showed that lower values of pH were measured in fish under artificial photoperiod (AP) during the entire measurement with faster progress of rigor mortis in comparison to fish under natural photoperiod (NP, control). In colour measurement, significant differences were detected in lightness L*, where NP fish (mature) were lighter than AP fish (immature). Significantly higher fillet contraction (p &lt; 0.05) more than 7% were observed among AP females compared to the control groups. Finally, we documented that extension of light period has a positive effect on the sensory evaluation, the fat content and FA composition of brook trout flesh, but the effect is only minimal.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10617 - Marine biology, freshwater biology, limnology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Aquaculture Research

ISSN

1355-557X

e-ISSN

—

Volume of the periodical

49

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

3817-3829

UT code for WoS article

000449876500012

EID of the result in the Scopus database

2-s2.0-85054688930