1 Ocak 2014 Dergi makalesi Açık Erişim

Ramey-Balci, Patricia A.; Ambler, Julie W.

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    <subfield code="a">The importance life history plays in understanding population dynamics and the functional roles of species for predicting climate change scenarios are well established. Yet, in the marine environment, the complete life history is unknown for many species, especially the link between morphologically and ecologically distinct planktonic larvae, and their corresponding benthic adult forms. Integration of meroplankton abundance, benthic adult species, larval morphology, and molecular data was employed to unravel the complete life history of Polygordius, a dominant polychaete in sandy shelf sediments of the Mid-Atlantic Bight. Polygordius species are unusual, having two distinct planktonic larval forms: an exolarva and an endolarva. Extensive sampling in the southern Mid-Atlantic Bight with careful preservation of meroplankton (2006-2007) revealed the identity of multiple stages of exo- and endolarvae, and their spatial, seasonal, and vertical distribution. Molecular and morphological evidence indicated exolarvae are Polygordius jouinae and endolarva are an undescribed species. Structure and development of these larvae differed greatly. P. jouinae exolarvae were found off Delaware Bay to North Carolina. At some stations, they were abundant, with densities up to 4,013 m(-3), comprising &amp;gt; 90 % of the total meroplankton. Exolarvae spent up to a month in the plankton starting in March/May depending on year, settlement began in July when larvae were at least 2 mm in length, and by October were no longer observed in the plankton. These findings are consistent with the distribution patterns and life cycle known for adults. This is the first report of endolarvae north of Cape Hatteras.</subfield>
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    <subfield code="a">Ramey-Balci, Patricia A.</subfield>
    <subfield code="u">TUBITAK Sci &amp; Technol Res Council Turkey, Marine Grp, Environm &amp; Cleaner Prod Inst, Marmara Res Ctr, TR-41470 Gebze, Kocaeli, Turkey</subfield>
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    <subfield code="a">10.1007/s00227-014-2441-7</subfield>
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    <subfield code="a">Distribution and seasonal abundance of Polygordius spp. (Class: Polychaeta; Family: Polygordiidae) exo- and endolarvae in the southern Mid-Atlantic Bight, USA</subfield>
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    <subfield code="a">Ambler, Julie W.</subfield>
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