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6 results for “Enriched rearing”
Data from: Rearing in strontium-enriched water induces vaterite otoliths in the Japanese rice fish, Oryzias latipes
<p>Sagittal otoliths, typically composed of aragonite, are frequently laid down rather as vaterite during growth in hatchery-reared fish populations. Sagittal vateritisation is believed to impair individual hearing/balancing abilities, but the causal mechanism remains unclear. Here we experimentally demonstrated that rearing in Sr-rich water induces sagittal vateritisation in the HdrR-II1 inbred strain of the Japanese rice fish, <em>Oryzias latipes</em>. Both sagittae were partly vateritised in 70% of individuals subjected to the Sr<sup>2+</sup> treatment (n = 10), whereas fish reared in normal tap water showed no sagittal vateritisation (n = 8). Our result is consistent with the theoretical prediction that vaterite becomes thermodynamically more stable than aragonite as the Sr<sup>2+</sup> concentration in solution increases. A vateritic layer develops surrounding the original aragonitic sagitta in vateritised otoliths, some of which take on a comma-like shape. Electron probe microanalysis demonstrates that the vateritised phase is characterised by lower Sr<sup>2+</sup> and higher Mg<sup>2+</sup> concentrations than the aragonitic phase. It is unlikely that increased environmental Sr<sup>2+</sup> is responsible for the sagittal vateritisation in farmed fish. However, our findings likely help to establish an in vivo assay using <em>O. latipes</em> to understand the physiological process underlying the sagittal vateritisation in farmed fish.</p>
Data from: Rearing in strontium-enriched water induces vaterite otoliths in the Japanese rice fish, Oryzias latipes
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Data from: Enriched rearing environment and wild genetic background can enhance survival and disease resistance of salmonid fishes during parasite epidemics
The importance and volume of aquaculture is increasing world-wide. Rearing practices play a key role in determining growth rate, survival and disease resistance in aquaculture fishes. Recent evidence suggests that in comparison with a standard stimulus-poor rearing environment, an enriched or variable rearing environment has significant positive effects on several traits underlying growth and well-being of fish. However, the effect of enriched rearing on one of the most important threats for aquaculture development, occurrence of parasitic infections, remains unknown. We used surveillance data of experimental salmonid populations of wild and hatchery origin under semi-natural parasite exposure to explore effects of enriched rearing on outbreaks of important aquaculture pathogens and associated fish mortalities in production-scale fish densities. We also conducted controlled parasite exposures to investigate if enriched rearing reduces susceptibility of fish to infection in comparison with standard rearing conditions. We found evidence of enriched rearing influencing survival and disease resistance of aquaculture fish during parasite epidemics. Essentially, populations from enriched rearing had a higher survival rate, lower parasite occurrence and greater resistance to most infections compared to fish held in standard rearing conditions. Similarly, fish of wild genetic background had lower mortality during some of the epidemics compared to fish of hatchery origin. However, we also demonstrate significant variation in these patterns and in some cases a tendency for opposite effects of enriched rearing and genetic background depending on the fish species and nature of the epidemic. Synthesis and applications. Our results suggest that parasitic infections and epidemics can be managed through enriched rearing conditions. This may have important implications for economically and ecologically sustainable parasite and disease prevention strategies in aquaculture.
Data from: Enriched rearing environment and wild genetic background can enhance survival and disease resistance of salmonid fishes during parasite epidemics
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The impact of rearing environment on C. elegans: Phenotypic, transcriptomic and intergenerational responses to 3D enriched habitats
GEO Series GSE317801. Caenorhabditis elegans. 12 samples. Type: Expression profiling by high throughput sequencing.
Transcriptomic responses of Atlantic salmon (Salmo salar) to environmental enrichment during juvenile rearing
GEO Series GSE63982. Salmo salar. 30 samples. Type: Expression profiling by array.
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Allen Brain Atlas
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OpenNeuro
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