A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Rearing background and exposure environment together explain higher survival of aquaculture fish during a bacterial outbreak (2019)


Räihä, V., Sundberg, L.-R., Ashrafi, R., Hyvärinen, P., & Karvonen, A. (2019). Rearing background and exposure environment together explain higher survival of aquaculture fish during a bacterial outbreak. Journal of Applied Ecology, 56(7), 1741-1750. https://doi.org/10.1111/1365-2664.13393


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Räihä, Ville; Sundberg, Lotta-Riina; Ashrafi, Roghaieh; Hyvärinen, Pekka; Karvonen, Anssi

Lehti tai sarja: Journal of Applied Ecology

ISSN: 0021-8901

eISSN: 1365-2664

Julkaisuvuosi: 2019

Volyymi: 56

Lehden numero: 7

Artikkelin sivunumerot: 1741-1750

Kustantaja: Wiley-Blackwell Publishing Ltd.

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1111/1365-2664.13393

Linkki tutkimusaineistoon: https://doi.org/10.5061/dryad.nd637r5

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/65123


Tiivistelmä

1.Parasitic diseases represent one of the greatest challenges for aquaculture worldwide and there is an increasing emphasis on ecological solutions to prevent infections. One proposed solution is enriched rearing, where traditional stimulus‐poor rearing tanks are equipped with different types of structures to increase habitat complexity. Such spatial enrichment is known to increase survival of fish during parasite epidemics, but the underlying mechanisms are still unclear.
2.We studied whether enriched rearing affected infection of an important fish pathogen Flavobacterium columnare in young Atlantic salmon (Salmo salar) and sea‐migrating brown trout (Salmo trutta). First, we used natural bacterial exposures and multiple fish populations in a common garden experiment to address the role of host genetic background in effects of enriched rearing. Second, fish from standard and enriched rearing were experimentally exposed to controlled bacterial doses in standard and enriched environments in a full factorial design to explore the relative roles of rearing background and environment of exposure on survival of fish.
3.Enriched rearing significantly increased survival of fish during the natural bacterial outbreak. This effect was also fairly consistent and observed in eight of the ten fish populations. In the controlled exposure, fish exposed in enriched environment had higher survival regardless of their rearing background, suggesting a stronger impact of the environment on the disease progression. Additionally, the survival in the enriched environment was the highest among the fish of enriched rearing background, supporting the idea of their higher resistance.
4.Synthesis and applications. Our study suggests that the enhanced survival of fish in enriched rearing is a result of a combined effect of the environment and improved fish condition and, to a lesser degree, from host genetic background. This has important implications for when and how environmental enrichment should be applied. Overall, these results indicate that environmental enrichment has the potential to improve survival of fish during parasitic epidemics and thus reduce use of antibiotics in aquaculture.


YSO-asiasanat: antibiootit; atlantinlohi; vesiviljely (kalatalous); geneettinen muuntelu; kalanviljely; lohikalat; taimen; kalataudit; infektiot; bakteerit; henkiinjääminen; ympäristötekijät

Vapaat asiasanat: brown trout; disease epidemiology; enriched rearing; flavobacterium columnare


Liittyvät organisaatiot

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Hankkeet, joissa julkaisu on tehty


OKM-raportointi: Kyllä

Raportointivuosi: 2019

JUFO-taso: 2


Viimeisin päivitys 2021-16-07 klo 10:40