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  • New publication: Complex European shag survival variability  Environmental drivers, including anthropogenic impacts, affect vital rates of organisms. Nevertheless, the influence of these drivers may depend on the physical features of the habitat and how they affect life history strategies depending on individual covariates such as age and sex. Here, the long-term monitoring (1994-2014) of marked European shags in eight colonies in two regions with different ecological features, such as foraging habitat, allowed us to test several biological hypotheses about how survival changes by age and sex in each region by means of multi-event capture-recapture modelling. Impacts included fishing practices and bycatch, invasive introduced carnivores and the severe Prestige oil spill. Adult survival was constant but, unexpectedly, it was different between sexes. This difference ...
    Posted Mar 22, 2018, 9:09 AM by David Alvarez
  • New book: La Luz de la Luciérnaga (In Spanish) Edited by Tundra EdicionesYou can buy the book following this link."David Alvarez presents in this volume a new selection of texts written for the Naturaleza Cantábrica blog, one of the most followed blogs in Spain about Ecology, Biology and Environment, distinguished with the 20Blogs Award for the best Environment blog 2013.Popular science and personal experiences through a collection of articles in which the author, with pleasant language, great sensitivity and sense of humor, talks about the topics that interest him since his childhood. Evolution and Natural history, the relations between the animals and the plants, geology,  astronomy,  journalistic ethics and nature conservaction are some of them"INDEX1. CRECED Y MULTIPLICAOS ¿Existen las amazonas en la naturaleza ...
    Posted Mar 22, 2018, 6:10 AM by David Alvarez
  • New publication: Demography of the critically endangered Balearic shearwater: impacts of fisheries and time to extinction World-wide, many seabirds are affected by fisheries in opposing ways: as a source of mortality from bycatch, but also by providing discards as a predictable and abundant food resource. This applies to the Balearic shearwater Puffinus mauretanicus, the most endangered European seabird, whose time to extinction was estimated at only ˜40 years a decade ago.Since the previous assessment, new data and more sophisticated demographic modelling have become available, and new fishing policies from the European Union (Common Fisheries Policy, CFP) will apply, posing different scenarios for the viability of the species. Thus, there is both an urgent need and an opportunity for a more reliable update of the conservation status of the species.Demographic data were collected between ...
    Posted Mar 11, 2016, 3:01 AM by David Alvarez
  • New publication: Census method comparision in an urban population of Fire salamander Amphibians are the most threatened vertebrates on Earth, and one of the main factors involved in their decline is the loss and fragmentation of their natural habitats. Contemporary urban development is a major cause of habitat fragmentation, and populations trapped within urban environments offer a unique opportunity to study effects of fragmentation. Here we compared, for the first time in fire salamanders (Salamandra salamandra), estimates of census (N) and effective population size (Ne) in a small urban population in the city of Oviedo (Spain). We performed a four year capture-mark-recapture study and used three single-sample Ne estimators based on 58 individuals genotyped for 15 polymorphic microsatellite loci. Our study showed a small (N̂=113 salamanders; 95% CI ...
    Posted Mar 11, 2016, 2:56 AM by David Alvarez
  • New book: Los vencejos sueñan despiertos (in Spanish) Ya está disponible el libro "Los vencejos sueñan despiertos", editado por la Tundra Ediciones. En este libro se recogen mas de 100 artículos que he publicado en el blog Naturaleza Cantábrica y otros inéditos escritos para este libro. La temática es muy variada, incluyendo textos de divulgación científica sobre Ecología evolutiva, la Selección sexual, la ecología o el cambio climático. Asimismo se hace una revisión crítica sobre varios de los problemas de conservación de la naturaleza y sobre todo de la gestión de la misma.Los artículos se han agrupado en las siguientes secciones:ÍNDICEPrólogo1. Evolución y selección natural.2. La evolución sí que es una historia de sexo y no las sombras de Grey.3. Amigos, enemigos ...
    Posted Mar 11, 2016, 2:53 AM by David Alvarez
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