The need for more information on the resistance to biological and environmental stressors in triploid oysters

Brianik, Christopher J.; Allam, Bassem

doi:10.1016/j.aquaculture.2023.739913

Cited by 10 publications

(6 citation statements)

References 130 publications

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“…As triploid oysters have been shown to lose their growth advantage over diploids in stressful environments (Callam et al, 2016;Davis, 1994;Wadsworth et al, 2019b) and are also more vulnerable to multi-stressor scenarios (George et al, 2023; J. Brianik & Allam, 2023;Li et al, 2022), direct physiological measurements that track these processes during the summer conditions, would be helpful for determining the exact causes of the triploid mortality. Additionally, as our sampling time was during peak summer (July 2020), both diploid and triploid oysters in our study were exposed to environmental spawning cues.…”

Section: Inter-ploidy Variation In Transcriptomic Response To Salinit...mentioning

confidence: 99%

“…All of these ‘triploid advantages’ have made them a desirable alternative to natural diploid oysters, and triploids have been adapted by many hatcheries as their primary basis for production (J. Brianik & Allam, 2023)…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…All of these 'triploid advantages' have made them a desirable alternative to natural diploid oysters, and triploids have been adapted by many hatcheries as their primary basis for production (J. Brianik & Allam, 2023) However, in recent years there have been reports of triploid eastern oysters experiencing higher mortality than diploid oysters during spring and summer months. This phenomenon, collectively termed as 'triploid mortality' has been observed along the US mid-Atlantic and Gulf of Mexico (GoM) coast.…”

Section: Introductionmentioning

confidence: 99%

“…Reproduction is a costly process for bivalves (J. Brianik & Allam, 2023), and additional challenge of investing in a metabolically costly endeavor in addition to stressful environmental condition could potentially lead to their increased mortality. Our study focuses on understanding the summer triploid mortality in GoM eastern oysters using comparative transcriptomics.…”

Section: Introductionmentioning

confidence: 99%

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Comparative transcriptomic analyses reveal differences in the responses of diploid and triploid eastern oysters to environmental stress during a summer mortality event

Vaidya,

Bodenstein,

Rasulova

et al. 2024

Preprint

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Triploid oysters are commonly used as the basis for production in the aquaculture of eastern oysters along the U.S East and Gulf of Mexico coasts. While they are valued for their rapid growth, incidents of triploid mortality during summer months have been well documented in eastern oysters, especially at low salinity sites. Various factors, including parental contribution, gametogenesis failures, as well as cellular and physiological issues stemming from their polyploid state have been proposed as potential causes of triploid mortality, but the exact molecular and physiological mechanisms remain unresolved. We used comparative transcriptomics to examine global transcriptomic responses at the onset of summer mortality (July 2020) in diploid and triploid oysters outplanted to a high and low salinity site, to detect unique gene expression patterns associated with outplant site, maternal broodstock, and ploidy. Diploid dams from three different salinity regimes were used to generate diploid and triploid oyster lines that were spawned at two hatcheries and were outplanted to high (annual mean salinity = 19.4 ± 6.7) and low (annual mean salinity = 9.3 ± 5.0) salinity sites. Our DEG analyses comparing diploid and triploid oysters detected very few DEGs across the three dams, indicating that diploid parentage was not a key contributing factor to triploid mortality. We detected a higher number of DEGs across outplant sites and cohorts, indicating stronger influence of these two factors on triploid mortality. At the low salinity site where triploid oysters experienced high mortality, we observed downregulation of GO terms related to calcium signaling, ciliary activity, and cell cycle check points. These GO terms implicate mis regulation of the low salinity stress response and problems during cell division as key contributors to elevated summer mortality in triploid oysters.

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Section: Inter-ploidy Variation In Transcriptomic Response To Salinit...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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