Differential performance of diploid, mated triploid, and induced triploid Pacific oysters under varied environmental conditions: Insights into impacts of temperature, dissolved oxygen, and pCO2

Norrie, Craig R.; Busch, D. Shallin; Davis, Jonathan; McElhany, Paul; Padilla Gamiño, Jacqueline L.

doi:10.1016/j.aquaculture.2025.742866

i

Differential performance of diploid, mated triploid, and induced triploid Pacific oysters under varied environmental conditions: Insights into impacts of temperature, dissolved oxygen, and pCO2

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2025
By Norrie, Craig R. ; Busch, D. Shallin ; Davis, Jonathan ; ...

Details

Journal Title:

Aquaculture
Personal Author:

Norrie, Craig R. ; Busch, D. Shallin ; Davis, Jonathan ; McElhany, Paul ; Padilla Gamiño, Jacqueline L.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center)
Description:

Pacific oysters (Crassostrea gigas) are an important aquaculture species due to their fast growth, high market demand, and adaptability. Triploid oysters, have an additional set of chromosomes relative to diploids, grow faster and are functionally sterile. Thus, triploids comprise a large proportion of oysters grown worldwide. Triploid oysters are reported to experience higher mortality than diploids. Growers must make decisions that balance the risks and rewards of growing triploids. Understanding how stressors affect oysters is essential to understanding the drivers of triploid mortality and to prepare for the impacts of climate change on individuals in aquaculture. Here, we examined impacts of temperature, dissolved oxygen (DO), and pCO2 on genetically related juvenile diploid, chemically induced triploid, and mated triploid Pacific oysters. Diploid and induced triploid groups were full siblings, mated triploids were half-siblings. We measured whole organism physiological responses—growth, mortality and respiration — after a 4-week exposure to different environmental conditions. Survival was high in all groups across a broad range of temperature and DO levels. Survival of mated triploids was negatively impacted at lower (but higher than ambient) pCO2 levels. Diploids and induced triploids had similar respiration across temperature and pCO2 experiments. Diploids respired more across all dissolved oxygen treatments. Differing performance of mated triploids suggests that production method or genetic background may contribute to their resilience or susceptibility to stress. Considering the stressors that will be placed on individuals in commercial aquaculture when making ploidy selections is essential to ensure the resilience of aquaculture as the climate changes.
Keywords:

Carbon Dioxide Growth Ocean Acidification Oxygen Pacific Oyster Respiration Temperature Water—Dissolved Oxygen Carbon Dioxide Ocean Acidification Pacific Oyster Water—Dissolved Oxygen Crassostrea Gigas PCO2 Survival Triploid Mortality
Source:

Aquaculture 609 (2025) 742866
DOI:

https://doi.org/10.1016/j.aquaculture.2025.742866
Format:

PDF
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
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CC BY-NC-ND
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Submitted
Main Document Checksum:

urn:sha-512:18e0a9a8099b985f47aa1ea966b858518ae9746c26cfe8eff8af765efa2c49da3eee533665e371bba5d58671430c6a26da9e5ff647b67aff04a76654c4933c87
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https://repository.library.noaa.gov/view/noaa/71139/noaa_71139_DS1.pdf
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[PDF - 6.59 MB ]

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