January 2017 Oyster Science Roundup

It’s the 2nd Day of 2017 and already there are some cool papers coming out.  Here are a few that caught my eye.
  • Researchers at TX A&M in Corpus Christi documented macrofauna abundance at intertidal oyster reefs and other estuarine habitats.  Oyster reefs tended to support higher density and species richness compared to seagrass and marsh edge, but that’s not the whole story.  The location of the reef relative to other features. ” These results indicate the importance of intertidal oyster reefs to macrofauna and that reef location within the estuarine mosaic influences density and community assemblages.”  
    • Gain, I.E., Brewton, R.A., Reese Robillard, M.M. et al., Macrofauna using intertidal oyster reef varies in relation to position within the estuarine habitat mosaic,  Mar Biol (2017) 164: 8. doi:10.1007/s00227-016-3033-5
  • Researchers in Brazil exposed C. gigas and C. brasiliana oysters to different thermal regimes for 28 days to gain insight into biochemical impacts of ocean temperature increase.  The authors found that life stage and species were important factors.  The introduced C. gigas  juveniles experienced significant mortality and other effects at higher temparature, while adults were less affected.  C. brasiliana oysters were less affected by increased temperatures at all life phases.
    • Anthony Moreira, Etelvina Figueira, Iracy L. Pecora, Amadeu M.V.M. Soares, Rosa Freitas, Biochemical alterations in native and exotic oyster species in Brazil in response to increasing temperature, Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, Volume 191, January 2017, Pages 183-193, ISSN 1532-0456, http://dx.doi.org/10.1016/j.cbpc.2016.10.008.
  • A team out of the Gulf Coast Research Laboratory, University of Southern Mississippi developed a model for predicting the transmission of dermo in the Eastern Oyster.  The authors suggest that overfishing may increase the susceptibility of a population to dermo infection.  They also suggested that coupling the infection model with hydrodynamic models could create a useful management tool.
    • G. Bidegain, E.N. Powell, J.M. Klinck, E.E. Hofmann, T. Ben-Horin, D. Bushek, S.E. Ford, D.M. Munroe, X. Guo, Modeling the transmission of Perkinsus marinus in the Eastern oyster Crassostrea virginica, Fisheries Research, Volume 186, Part 1, February 2017, Pages 82-93, ISSN 0165-7836, http://dx.doi.org/10.1016/j.fishres.2016.08.006.
  • A group out of LSU (Geaux Tigers!) exposed progeny of oyster stocks from differing salinity regimes to a variety of conditions along a salinity gradient.  The authors found that the different stocks may be genetically differentiated.  For example, some were more resistant to low salinity conditions, while other stocks were more resistant to dermo infection.
    • Justin M. Leonhardt, Sandra Casas, John E. Supan, Jerome F. La Peyre, Stock assessment for eastern oyster seed production and field grow-out in Louisiana, Aquaculture, Volume 466, 1 January 2017, Pages 9-19, ISSN 0044-8486, http://dx.doi.org/10.1016/j.aquaculture.2016.09.034.
  • Our neighbors to the north found that the Easter oyster, in the northernmost part of its range could become quiescent for months during the winter, including periods where the oysters were buried.  Early burial, which extends the quiescent period, led to increased mortality.  Removing buried oysters during the quiescent period actually accelerated mortality because the oysters began depleted energy reserves.  The authors suggest that aquaculturists avoid soft estuarine sediment whenever possible.
    • Luc A. Comeau, André Mallet, Claire Carver, Jean-Bruno Nadalini, Réjean Tremblay, Behavioural and lethal effects of sediment burial on quiescent Eastern oysters Crassostrea virginica, Aquaculture, Volume 469, 20 February 2017, Pages 9-15, ISSN 0044-8486, http://dx.doi.org/10.1016/j.aquaculture.2016.11.038.

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