Goodwin Anne M.

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Goodwin
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Anne M.
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  • Article
    Abundance and diversity of ascidians in the southern Gulf of Chiriquí, Pacific Panama
    (Regional Euro-Asian Biological Invasions Centre (REABIC), 2011-07-04) Bullard, Stephan G. ; Carman, Mary R. ; Rocha, Rosana M. ; Dijkstra, Jennifer A. ; Goodwin, Anne M.
    Little is known about the ascidian fauna of Pacific Panama. Ascidian surveys were conducted in the southern Gulf of Chiriquí on the Pacific coast of Panama in January 2008 and 2009. Surveys along linear transects at 2-3 m depth (snorkel, 2008) and 5 and 12 m depth (SCUBA, 2009) were conducted at multiple sites within a chain of islands extending out from the mainland. Twelve different ascidian taxa were observed with mean densities of up to ~17 ascidians m-2. The most abundant species was Rhopalaea birkelandi. Two of the most abundant taxa (Ascidia sp., Pyura sp.) appear to represent previously undescribed species. Several species of didemnids were also abundant. Ascidians were most abundant near the coast of the mainland and were less abundant near the islands farthest offshore. These data on Panamanian ascidian communities provide a baseline of local biodiversity against which it will be possible to determine whether the communities change over time, if additional species become introduced to the region, or if native Panamanian species become invasive in other parts of the world.
  • Article
    Ascidians at the Pacific and Atlantic entrances to the Panama Canal
    (Regional Euro-Asian Biological Invasions Centre (REABIC), 2011-08-12) Carman, Mary R. ; Bullard, Stephan G. ; Rocha, Rosana M. ; Lambert, Gretchen ; Dijkstra, Jennifer A. ; Roper, James J. ; Goodwin, Anne M. ; Carman, Mimi M. ; Vail, Elisabete M.
    The Panama Canal region is susceptible to non-native species introductions due to the heavy international shipping traffic through the area. Ascidian introductions are occurring worldwide but little is known about introductions at the Panama Canal. Surveys were conducted in 2002, 2008, and 2009 within the Pacific and Atlantic entrances to the canal. We found a high diversity of ascidians on both sides of the canal, dominated by non-native species; six species occurred at both Pacific and Atlantic Panama sites. This is the first report of Polyandrocarpa anguinea and P. sagamiensis in Atlantic Panama waters and Ascidia incrassata, Ascidia sydneiensis, Botrylloides nigrum, Botryllus planus, Didemnum perlucidum, Diplosoma listerianum, Microcosmus exasperatus, Polyandrocarpa zorritensis, Polyclinum constellatum, Symplegma brakenhielmi, Symplegma rubra, and Trididemnum orbiculatum in Pacific Panama waters. The canal may serve as a major invasion corridor for ascidians and should be monitored over time.