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Reproductive pattern of Southern geoduck, Panopea abbreviata, at El Sótano (San Matías Gulf, Patagonia, Argentina)
Zaidman, P.C.; Kroeck, M.A.; Oehrens Kissner, E.M.; Morsan, E.M. (2012). Reproductive pattern of Southern geoduck, Panopea abbreviata, at El Sótano (San Matías Gulf, Patagonia, Argentina). Mar. Biol. Res. 8(2): 172-181. dx.doi.org/10.1080/17451000.2011.605145
In: Marine Biology Research. Taylor & Francis: Oslo. ISSN 1745-1000, more
Peer reviewed article

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Keywords
    Reproductive cycle; Spawning; Panopea abbreviata Valenciennes, 1839 [WoRMS]; PSW, Argentina, San Matias Gulf [Marine Regions]; Marine

Authors  Top 
  • Zaidman, P.C., editor
  • Kroeck, M.A.
  • Oehrens Kissner, E.M.
  • Morsan, E.M.

Abstract
    The reproductive cycle of the southern geoduck (Panopea abbreviata) in a northern Patagonian population was studied throughout a 24-month period (April 2006–April 2008) using standard histological techniques and quantitative indicators (oocyte diameter distribution, oocytes per ocular field and relative oocyte area). P. abbreviata exhibits a reproductive pattern characterized, in both sexes, by a continuous proliferation and spawning throughout the year. This is similar to that described in southern geoduck populations and is unique to this genus. Quantitative indicators allowed us to elucidate a slight seasonality in the reproductive cycle: a more pronounced spawning during warm months and gamete accumulation during could months. This article describes the first record of hermaphroditic individuals (n = 4) for P. abbreviata.

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