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San Sebastián de los Reyes, Spain

Garcia-Roa R.,CSIC - National Museum of Natural Sciences | Cabido C.,Sociedad de Ciencias Aranzadi | Lopez P.,CSIC - National Museum of Natural Sciences | Martin J.,CSIC - National Museum of Natural Sciences
Biochemical Systematics and Ecology | Year: 2016

Chemical signals play an important role in intraspecific communication and social organization of many animals, but they also may be useful in interspecific recognition. In lizards, chemical signals are often contained in femoral gland secretions, of which composition may vary between species and populations. This may be especially important in recognition and reproductive isolation between closely related species. We analyzed by gas chromatography-mass spectrometry (GC-MS) the lipophilic fraction of femoral gland secretions of two closely related wall lizard species, Podarcis bocagei and Podarcis carbonelli to test for possible interspecific differences in chemical composition. We found 56 lipophilic compounds in femoral gland secretions of male P. bocagei and 60 in P. carbonelli. The main compounds were steroids and waxy esters, but we also found carboxylic acids and their esters, alcohols, amydes, aldehydes, squalene, ketones and furanones. There were significant differences between species with respect to the number and relative proportions of compounds. Differences in chemical composition might be a consequence of phylogenetic differences per se, but they could also be explained by ecological adaptation to different microclimatic conditions. These differences in chemical profiles may explain the known chemosensory interspecific recognition between these two lizards, contributing to their reproductive isolation. © 2015 Elsevier Ltd.

Bosmans R.,Terrestrial Ecology Unit | Castro A.,Sociedad de Ciencias Aranzadi
Arachnology | Year: 2016

A new species of the genus Tenuiphantes is described from France and Spain: Tenuiphantes cantabropyrenaeus Bosmans, n. sp. The species looks like T. jacksoni, T. jacksonoides, and T. zimmermanni. However, the location of the tooth of the lamella characteristica and the shape of the scape distinguish T. cantabropyrenaus from these species. A diagnosis is provided for the new species, together with notes on distribution and habitat. © 2016, British Arachnological Society. All rights reserved.

Alvarez-Fernandez E.,University of Salamanca | Barrera-Mellado I.,University of Salamanca | Cubas M.,Sociedad de Ciencias Aranzadi | Fernandez-Gomez M.J.,University of Salamanca | And 3 more authors.
Comptes Rendus - Palevol | Year: 2014

The archaeozoological remains found in the four Neolithic and Chalcolithic sub-levels at the archaeological site of Los Gitanos Cave are analysed. Continuity is seen in the exploitation of the marine environment, while the percentage of domestic ungulates, in comparison with hunted animals, progressively increases. Finally, the site is contextualised in an overview of the use of animal resources in Cantabrian Spain from the fifth to the third millennia. © 2014 Académie des sciences.

Rofes J.,University of the Basque Country | Murelaga X.,University of the Basque Country | Martinez-Garcia B.,University of the Basque Country | Bailon S.,French National Center for Scientific Research | And 7 more authors.
Quaternary International | Year: 2014

The cave of Santimamiñe (Kortezubi, Bizkaia, Spain), on the southern slopes of the Ereñozar Mountain (Urdaibai biosphere reserve), is one of the most famous prehistoric localities of the Cantabrian range. Between 2004 and 2006, a test trench revealed a 6m-deep stratigraphic sequence in the inner vestibule of the cave covering ~20,000 years, from the latest Late Pleistocene (MIS 2) to the middle Holocene (MIS 1). It comprises six chrono-cultural units: lower, middle and upper Magdalenian, Azilian, Neolithic, and Chalcolithic/Bronze Age, plus seven lower purely palaeontological levels. More than 47,000 microvertebrate elements (including mammals, birds, reptiles, amphibians and fishes) were recovered, of which 1587 were identified to the genus and/or species levels. Of these, small mammals were used for paleoenvironmental reconstruction since they are very sensitive to climatic conditions and their distributions over time, measured in terms of relative abundance, serve as reliable proxies of habitat and climatic change. The reconstruction of Santimamiñe past environments based on small mammals roughly coincides with other proxies, such as the amphibian/reptile, large mammal/bird, palynological, and cryoclastic records on the local scale; other paleoenvironmental reconstructions from north Iberia on the regional scale; and the oxygen isotopic curve of an ice core from central Greenland on the global scale. All Magdalenian levels from Santimamiñe were deposited during the Oldest Dryas, a mostly cold and humid period including the Heinrich event 1. Small mammalian, palynological and cryoclastic evidence likely document the shift from the cold Younger Dryas to the beginning of the Holocene Climatic Optimum during Azilian times. The uppermost level, deposited during a moderate re-opening of the landscape at the Subboreal, slightly postdates the Holocene Cooling Event 3. © 2013 Elsevier Ltd and INQUA.

Zuberogoitia I.,Icarus | Gonzalez-Oreja J.A.,Instituto Vasco Of Investigacion Y Desarrollo Agrario | Rodriguez-Refojos C.,Sociedad de Ciencias Aranzadi
Biodiversity and Conservation | Year: 2010

Biological invasions are an important cause of biodiversity loss, American mink being one of the worst invasive species in Europe. We performed a 13-week control program of the species in the Butron river system (Northern Spain), where a natural population of the European mink is found. Three population estimates were considered: an absolute minimum, an intermediate scenario and a pessimistic one (n = 35, 49 and 70 animals, respectively). After 2,242 cage trap-nights, trapping success varied from 44 to 89% of these estimates. In addition, we evaluated the costs of eradicating the estimated populations; costs ranged between 652.5 and 2,970 € per mink, and would rise up to 83,462 € for the intermediate estimate under an exponential function linking captures and costs, or ca. 172.500 € to capture the highest estimate under a log-function. The implications of these numbers for the design and implementation of future control projects are discussed. © Springer Science+Business Media B.V. 2010.

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