The respective influence of testosterone and estradiol on the structure of the Common Canary Serinus canaria song was studied by experimentally controlling blood levels of steroid hormones in males and analyzing the consequent effects on acoustic parameters. A detailed acoustic analysis of the songs produced before and after hormonal manipulation revealed that testosterone and estradiol seem to...

To be considered for publication, solutions should be received by September 1, 2011. 1866. Proposed by Sadi Abu-Saymeh and Mowaffaq Hajja, Mathematics Department, Yarmouk University, Irbid, Jordan. Let ABC be a triangle, and L and M points on AB and AC, respectively, such that AL = AM. Let P be the intersection of BM and CL. Prove that PB = PC if and only if AB = AC. 1867. Proposed by Ángel Pla...

In this paper we present a mobile information system for a public utility company of road transport. The main achievements are the improvement of the following strategic aspects: service for the users, planning and decision making of the enterprise. The most relevant system characteristics are: the use of new information technology and the use of standard technology. Now the system is working o...

Bring home now the book enPDFd computer aided systems theory eurocast 2005 10th international conference on computer aided systems theory las palmas de gran canaria spain february 7 11 2005 revised selected papers to be your sources when going to read. It can be your new collection to not only display in your racks but also be the one that can help you fining the best sources. As in common, boo...

In this study, we update the knowledge about wild bees of genus Hylaeus in Canary Islands and discuss possible effect on phenology exotic species endemic ones. Our records come both from entomological samplings citizen science through photos registered social networks. An additional molecular approach was performed to confirm correct identification analyze their geographic origin. Two new speci...

The Open University's repository of research publications and other research outputs Defending and challenging interpretations of the past: The role of argument in school history Journal Article How to cite: Coffin, Caroline (2000). Defending and challenging interpretations of the past: The role of argument in school history. Revista Canaria de Estudios Ingleses, 40 pp. 135–153. Copyright and M...

Microzooplankton grazing and phytoplankton growth in marine mesocosms with increased CO2 levels K. Suffrian, P. Simonelli, J. C. Nejstgaard, S. Putzeys, Y. Carotenuto, and A. N. Antia Leibniz Institute for Marine Sciences (IFM-GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany University of Bergen, Department of Biology, P.O. Box 7800, 5020 Bergen, Norway Department of Biology, UNIFOB, P.O. Bo...

Diet and helminth fauna were analysed in Gallotia stehlini (Schenkel, 1901), a giant lacertid lizard endemic to Gran Canaria (Canary Islands, Spain) in order to explore eventual relationships between both traits. This species is mainly herbivorous, eating a large proportion of plant matter (occurrence 97.1%) including not only seeds but also leaves and other vegetative parts. Helminth fauna inc...