Effect of temperature and oxygen regime on growth and physiology of juvenile Salvelinus fontinalis x Salvelinus alpinus hybrids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F20%3A43900849" target="_blank" >RIV/60076658:12520/20:43900849 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.aquaculture.2020.735119" target="_blank" >https://doi.org/10.1016/j.aquaculture.2020.735119</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aquaculture.2020.735119" target="_blank" >10.1016/j.aquaculture.2020.735119</a>

Result language

angličtina

Original language name

Effect of temperature and oxygen regime on growth and physiology of juvenile Salvelinus fontinalis x Salvelinus alpinus hybrids

Original language description

Effect of oxygen saturation and thermal regimes on growth and selected physiological indicators of juvenile Salvelinus fontinalis x Salvelinus alpinus hybrids were investigated in separate experiments. Hybrid status of tested fish, with S. fontinalis as the maternal species, was confirmed by sequence analysis. During both experiments fish doubled their initial weight in most tested groups. In experiment 1, fish (n = 516, 70.6 +/- 1.5 g) were exposed to one of four oxygen regimes (normal, hyperoxic, 12 h alternating normal/hyperoxic, and 24 h alternating normal/hyperoxic) in triplicate (12 rearing tanks of four separate RAS) for 63 days. More favourable growth parameters were observed under normoxic conditions (85-95%) in comparison with hyperoxia (120-130%). Oxygen saturation was not associated with final feed conversion ratio, size variation, condition factor, selected somatic indices, or overall mortality rate. Oxygen saturation was significantly positively associated with leukocyte count and negatively associated with mean corpuscular haemoglobin concentration. Gills showed slight to moderate atypia in groups exposed to hyperoxia compared to the normoxia group. In experiment 2, fish (n. = 560, 21.7 +/- 0.3 g) were held in 7, 10, 13, or 16 degrees C water in four repetitions (16 rearing tanks of four separate RAS) for an 84-day period. Selected growth parameters were significantly higher at 13 degrees C than at 7, 10, and 16 degrees C. Feed conversion ratio was the lowest at 13 and 16 degrees C. Size variation and somatic indices exhibited no differences among treatments, while condition factor was significantly higher at 10 and 13 degrees C. Mortality rate increased from 1.4% to 30.5% with rise in temperature, with highest mortality recorded at 16 degrees C. Hyperoxia showed no advantage on growth of tested hybrids, while 13 degrees C was optimal water temperature for their culture.

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

40103 - Fishery

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

2020

Confidentiality

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

Name of the periodical

Aquaculture

ISSN

0044-8486

e-ISSN

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Volume of the periodical

522

Issue of the periodical within the volume

neuveden

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

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UT code for WoS article

000522956800020

EID of the result in the Scopus database

2-s2.0-85080044969