Ara mostrant els elements 1-10 de 77
Taboada Moreno, Sergio (Data de defensa: 2012-07-20)
Esta tesis cubre diferentes aspectos de los invertebrados marinos bentónicos de la Antártida. Se trata de una tesis multidisciplinar presentada en formato artículos en la que se hacen las siguientes ...
Ponjoan Thäns, Anna (Data de defensa: 2012-12-14)
El sisó (Tetrax tetrax) és un ocell estepari que a Europa ocupa principalment ambients agrícoles i està en declivi poblacional a causa, principalment, de la intensificació agrícola. En aquesta tesi ...
Afán Asencio, Isabel (Data de defensa: 2016-10-10)
Seabirds have evolved within an open and dynamic environment, the ocean. As meso-top predators, seabirds are greatly influenced by the oceanographic conditions driving marine productivity, and therefore, ...
Stegun Vidigal, Vera Cristina (Data de defensa: 2015-01-21)
The short-tailed opossums of the genus Monodelphis Burnett, 1830 are small-bodied semifossorial marsupials which inhabit almost all major biomes of South America up to 2200 m. Even though it is one of ...
Núñez Pons, Laura (Data de defensa: 2012-11-06)
The inhabitants of marine benthos must combat the ecological pressure caused by predation, competition and fouling through a series of mechanisms, one of which is chemical defense. This type of protection ...
García-Tarrasón, Manuel (Data de defensa: 2014-12-19)
The results presented in this thesis have shown the strong dependence of Audouin’s gull from the Ebro Delta on fisheries. Foraging movements of breeding birds showed a great association with fishing ...
Fabré Mitjans, Noëlle (Data de defensa: 2014-10-30)
El blenio de río (Salaria fluviatilis) es un pez de agua dulce de distribución circum-mediterránea que se encuentra amenazado en muchos de los países en los que se ha descrito. Con tal de aportar ...
Mora de Checa, Elisa (Data de defensa: 2015-12-14)
Mygalomorphs is a cosmopolitan group that inhabits all the continents except Antarctica. The group and has been commonly described as ‘primitive’ because of the retention of plesiomorphic characters, ...
Cardador Bergua, Laura (Data de defensa: 2011-10-07)
Change in species geographic ranges is a natural phenomenon, but the rate and magnitude of such change has significantly increased due to anthropogenic causes. The rate at which a population spreads/contracts ...
Ros-Farré, Palmira (Data de defensa: 2012-10-26)
Aquesta tesi es centra en l’estudi taxonòmic d’algunes subfamílies d’himenòpters parasitoids, aquestes pertanyen a la superfamília Cynipoidea, família Figitidae. S’ha estudiat la taxonomia de dues ...