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Browsing by Author "Loureiro, Nuno de Santos"

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  • Praia Grande of Príncipe Island (Gulf of Guinea): an important nesting beach for the green turtle Chelonia mydas
    Publication . Loureiro, Nuno de Santos; Carvalho, Hualton; Rodrigues, Zeferino
    The beach Praia Grande, on Príncipe Island (Gulf of Guinea, West Africa), hosts a green turtle rookery. A total of 219 clutches with an average size of 111 eggs were laid by the 88 females that nested there during the 2007-2008 nesting season. During the nesting season 2009-2010, 315 clutches, averaging 104 eggs, were laid by the 112 females that were recorded. During both seasons, nesting began in early September and lasted until late February, with a peak in December-January. In the 2009-2010 nesting season, the clutch frequency was 2.7 (SD = 1.3) and the average renesting interval 12.3 days (SD = 1.8). The average incubation duration of the clutches that were incubated in situ, shaded by the existing natural vegetation, was 60.4 days (SD = 1.4) However, throughout the 2007-2008 nesting season almost all the clutches were incubated in an unshaded hatchery and the average incubation duration was 3.2 days shorter. The data published here is the first report concerning the green turtle rookery on Praia Grande, Príncipe Island.
    2011Journal article Open access Show more
  • Presence of fibropapillomatosis in green turtles Chelonia mydas at Príncipe Island in the Gulf of Guinea
    Publication . Loureiro, Nuno de Santos; Matos, Damião
    Fibropapillomatosis is a transmissible and life threatening disease associated with one or more herpesviruses that are afflicting sea turtles worldwide (Herbst 1994). First documented on green turtles Chelonia mydas (Quackenbush et al. 1998), since the 1990's it has been found on other species, like hawksbills Eretmochelys imbricata (D’Amato & Moraes-Neto 2000; Williams & Bunkley-Williams 1996), olive ridleys Lepidochelys olivacea (Herbst 1994), loggerheads Caretta caretta (Aguirre 1998; Harms et al. 2008), and leatherbacks Dermochelys coriacea (Huerta et al. 2000). The etiology and prevalence of fibropapillomatosis are not fully understood and further research is needed. Even so, it is accepted that pelagic juveniles are free of the disease when recruiting to coastal foraging grounds (Ehrhart et al. 2000). [...]
    2009Journal article Open access Show more