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Attributing hypoxia responses of early life Menidia menidia to energetic mechanisms with Dynamic Energy Budget theory

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  • Schwemmer, Teresa G.
  • Nisbet, Roger M.
  • Nye, Janet A.

Abstract

Ocean deoxygenation is intensifying worldwide due to warming and eutrophication, particularly in estuaries and coastal waters. Although the Atlantic silverside (Menidia menidia) is tolerant of the fluctuating environmental conditions in its estuarine habitat, chronic hypoxia impairs hatching, growth, and survival in the early life stages. We used a simplified version of a Dynamic Energy Budget model (DEBkiss) to test the hypothesis that experimentally observed changes in animal performance can be explained by one or more of the rate processes in the model. We sought to identify the DEBkiss parameters that, when adjusted with a correction factor based on inhibition of Synthesizing Units, provided the best fit to hypoxia effects in the three state variables of total length, egg buffer mass, and survival over time. Because hypoxia reduces survival in embryos and newly hatched larvae, we added a survival state variable controlled by pre- and post-hatching mortality parameters. Applying the hypoxia effects to reduce the conversion efficiency of assimilates to structure accounted for some of the hypoxia-related changes in all three state variables. However, the best fit was achieved by simultaneously reducing the conversion efficiency and increasing both mortality parameters. In contrast, changing the parameter for maintenance rate with hypoxia provided little to no improvement of fit to the data. Reduced conversion efficiency under hypoxia would suggest that less of the energy invested by parents and consumed through predation is converted into biomass in M. menidia offspring, with implications for size at age that could threaten recruitment and alter the flow of energy through the food web.

Suggested Citation

  • Schwemmer, Teresa G. & Nisbet, Roger M. & Nye, Janet A., 2024. "Attributing hypoxia responses of early life Menidia menidia to energetic mechanisms with Dynamic Energy Budget theory," Ecological Modelling, Elsevier, vol. 498(C).
  • Handle: RePEc:eee:ecomod:v:498:y:2024:i:c:s0304380024002771
    DOI: 10.1016/j.ecolmodel.2024.110889
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    References listed on IDEAS

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    1. Jager, Tjalling & Malzahn, Arne M. & Hagemann, Andreas & Hansen, Bjørn Henrik, 2022. "Testing a simple energy-budget model for yolk-feeding stages of cleaner fish," Ecological Modelling, Elsevier, vol. 469(C).
    2. Kooijman, Sebastiaan A.L.M. & Lika, Konstadia & Augustine, Starrlight & Marn, Nina & Kooi, Bob W., 2020. "The energetic basis of population growth in animal kingdom," Ecological Modelling, Elsevier, vol. 428(C).
    3. Jager, Tjalling & Nepstad, Raymond & Hansen, Bjørn Henrik & Farkas, Julia, 2018. "Simple energy-budget model for yolk-feeding stages of Atlantic cod (Gadus morhua)," Ecological Modelling, Elsevier, vol. 385(C), pages 213-219.
    4. Christopher S Murray & Hannes Baumann, 2020. "Are long-term growth responses to elevated pCO2 sex-specific in fish?," PLOS ONE, Public Library of Science, vol. 15(7), pages 1-21, July.
    5. Hamda, Natnael T. & Martin, Benjamin & Poletto, Jamilynn B. & Cocherell, Dennis E. & Fangue, Nann A. & Van Eenennaam, Joel & Mora, Ethan A. & Danner, Eric, 2019. "Applying a simplified energy-budget model to explore the effects of temperature and food availability on the life history of green sturgeon (Acipenser medirostris)," Ecological Modelling, Elsevier, vol. 395(C), pages 1-10.
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