Mostrando recursos 1 - 2 de 2

  1. Predation on roseate tern eggs by European starlings in the Azores

    Neves, Verónica C.; Panagiotakopoulos, Sotirios; Ratcliffe, Norman
    Predation by the European starling (Sturnus vulgaris) was the main reason for roseate tern (Sterna dougallii) hatching failure on Vila islet, Azores, one of the species’ largest colonies in Europe. Observations showed that single or small groups of starlings were responsible for predation events and that tern nest defense against starlings was generally ineffective. Daily nest survival rate was 94.2% in 2002 and 90.0% in 2003. Nesting success was estimated using a simulation model that allowed for renesting following failure and was 0.42 in 2002 and 0.17 in 2003. These values are considerably lower than the 0.97 nesting success at...
    - 09-feb-2017

  2. First record of Craspedacusta sowerbii Lankester, 1880 (Cnidaria: Limnomedusae) in the Azores

    Raposeiro, Pedro M.; Ramos, João; Costa, Ana C.
    [...]. This short communication, reporting the occurrence of C. sowerbii in the Congro Lake (São Miguel), is a result of the ongoing monitoring work of freshwater ecosystems performed by the University of Azores (e.g Gonçalves et al. 2008; Raposeiro & Costa 2009). Intense sampling has been carried out for the last six years in freshwater systems, but only now did we find this species.
    - 09-feb-2017

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.