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    Anti-predation strategy, growth rate and extinction amongst Pliocene scallops of the US eastern seaboard

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    Authors
    Johnson, Andrew L. A.
    Valentine, Annemarie
    Leng, Melanie J.
    Sloane, Hilary J.
    Schoene, Bernd
    Surge, Donna
    Affiliation
    University of Derby
    University of Loughborough
    British Geological Survey
    University of Mainz
    University of North Carolina at Chapel Hill
    Issue Date
    2017-06-29
    
    Metadata
    Show full item record
    Abstract
    Placopecten, Chesapecten and Carolinapecten are scallop genera occurring in the Pliocene of the US eastern seaboard. The first (extant) is a smooth, streamlined form, adept at escaping predators by swimming (‘flight’ strategy). The other two (extinct) are plicate forms. Plication facilitates a ‘resistance’ strategy towards predators which is benefited by large size and high shell thickness - maximally so if these states are achieved early in life. Oxygen isotope profiles show that in early ontogeny, Pliocene Placopecten grew at the same moderate rate as modern Placopecten. By contrast, Chesapecten grew as fast as the fastest-growing modern scallop and developed an unusually thick shell, while Carolinapecten grew substantially faster still, this probably enabled by high primary productivity. Extinction of these genera, and survival of Placopecten, can be attributed to a decline in productivity which prevented a maximally effective ‘resistance’ strategy towards predators but had no deleterious impact on a ‘flight’ strategy.
    Citation
    Johnson ALA, Valentine A, Leng MJ, Sloane HJ, Schöne BR & Surge D (2017) 'Anti-predation strategy, growth rate and extinction amongst Pliocene scallops of the US eastern seaboard.' Environmental Sustainability Research Centre Annual Conference (University of Derby, 29 June 2017), Programme and Abstracts, 23.
    URI
    http://hdl.handle.net/10545/621802
    Additional Links
    https://www.derby.ac.uk/science/research/centres-groups/environmental/
    Type
    Presentation
    Language
    en
    Collections
    Environmental Sustainability Research Centre

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