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Las altas temperaturas están provocando que las lagunas y las marismas de Doñana pierdan agua rápidamente

La superficie inundada en la marisma es de un 78% pero la profundidad es escasa. Por otra parte, sólo el 1,9% de las lagunas temporales están inundadas. Las precipitaciones crean una oportunidad...

Traffic noise causes lifelong harm to baby birds

A study with CSIC participation reveals for the first time that car noise harms individuals throughout their lifetime even years after exposure

Illegal wildlife trade, a serious problem for biodiversity and human health

A research team led by the Doñana BIological Station and the University Pablo de Olavide have detected wild-caught pets in 95% of the localities in the Neotropic and warns of the risk of zoonotic...

Urbanization and loss of woody vegetation are changing key traits of arthropod communities

Urbanization is favouring smaller beetle species and larger spider species with greater dispersal capacity.

The loss of woody areas is linked to a decline in the duration of the activity...

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New publication: Age and origin make the difference

Age and origin make the difference

Populations of trophic generalists may include specialised individuals. Optimal foraging theory states that individuals should feed on those resources most valuable to them. This, however, may vary. White storks are trophic generalists at the population level. Their European population increased wintering in Southern Europe, where they feed upon new anthropogenic food subsidies: dumps and less invasive crayfishes in ricefields. The foraging strategies of resident and wintering storks in SW Spain in were studied ricefields and dumps. Multievent capture-recapture model showed that there were more specialists among residents than immigrants, and that ricefield use increased with individual age. Results provide empirical evidence of high individual foraging consistency within a generalist species and a differential resource selection by individuals of different ages and origins probably related to their previous experience in the foraging area. informacion[at]ebd.csic.es: Sanz-Aguilar et al (2014) Multievent capture-recapture analysis reveals individual foraging specialisation in a generalist species. Ecology. Doi 10.1890/14-0437.1


http://www.esajournals.org/doi/abs/10.1890/14-0437.1