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23/10/2014
Determining spatio-temporal dynamics in distribution and structure of different populations is crucial to our understanding of their ecology and interactions. The winter distribution of Marsh Harrier (Circus aeruginosus) in the Iberian Peninsula is used to analyse the potential of spatial distribution models and stable isotope analyses of feathers to evaluate differences in spatial distribution of migrant and resident raptor populations in southern Europe. Most migrant harriers had a central and northern latitudinal European origin. Results revealed segregation in the winter distribution of migrant and resident populations, suggesting that ecological conditions and potential stressors could greatly differ among resident and migrant populations in winter. A useful methodological procedure is provided to evaluate spatial segregation and presenting a new challenge to the study of their ecological consequences. informacion[at]ebd.csic.es: Cardador et al (2014) Breeding origin and spatial distribution of migrant and resident harriers in a Mediterranean wintering area: insights from isotopic analyses, ring recoveries and species distribution modelling. J Ornithol. Doi: 10.1007/s10336-014-1122-0
20/10/2014
A new species within the genus Liolaemus from southeast Argentine Patagonia is described. This new taxon, Liolaemus yatel sp. nov., presents anatomical traits shared with the Liolaemus lineomaculatus section within the Liolaemus lineo-maculatus group. However, Liolaemus yatel sp. nov. does not exhibit trifid dorsal scales, which is a diagnostic character of the L. lineomaculatus group. Moreover, this new species differs from other taxa of the L. lineomaculatus group in that dorsal and nuchal scales either completely lack keels or are slightly keeled. Additionally, the presence of trifid scales in Liolaemus magellanicus was recorded, another species included in the L. lineomaculatus section. These findings provide additional information for the study of evolutionary relationships among the species of the L. lineomaculatus section, especially the establishment of their diagnostic character status. informacion[at]ebd.csic.es: Abdala et al (2014) New Patagonian species of Liolaemus (Iguania: Liolaemidae) and novelty in the lepidosis of the southernmost lizard of the world: Liolaemus magellanicus. Zootaxa 3866: 526-542. Doi: 10.11646/zootaxa.3866.4.4
17/10/2014
A severe ecological perturbation caused by artificial lights is mass mortalities of organisms, including seabird fledglings that are attracted to lights at night on their first flights to the sea. During a 15-year period, the number of fledging short-tailed shearwaters Ardenna tenuirostris found grounded in evening and morning at Phillip Island, Australia, has been reported. Factors as date, moon phase, wind direction and speed, number of visitors and holiday periods were assessed. Light-induced mortality of seabirds is usually underestimated. More birds (dead and alive) were rescued in peak fledging, moonless and windy nights. Mortality increased through the fledging period, in the mornings and with increased traffic on holiday periods. While moon, wind and time are uncontrolled natural constraints, this study demonstrated that reduction of light pollution and better traffic management can mitigate artificial light-induced mortality. informacion[at]ebd.csic.es: Rodríguez et al (2014) Fatal attraction of short-tailed shearwaters to artificial lights. PloS One. Doi 10.1371/journal.pone.0110114
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    Estación Biólogica de Doñana - Consejo Superior de Investigaciones Científicas - Apdo 1056 E - 41013 Sevilla
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