Cordero Tapia, Pedro Javier (Date of defense: 1986-07-11)
Se analiza la relación ecológica entre "Passer montanus" y "Passer domesticus" respecto a los lugares de nidificación en áreas de solapamiento de ambas especies en la provincia de Barcelona (hábitats ...
Cebrian Pujol, Emma (Date of defense: 2007-04-20)
Many antrophic activities release pollutants to the marine environment. Among them heavy metals are of great importance, since they are conservative pollutants, which can be accumulated through trophy ...
García-Tarrasón, Manuel (Date of defense: 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 (Date of defense: 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 (Date of defense: 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, ...
Montori Faura, Alberto (Date of defense: 1988-11-23)
Los objetivos abordados en la presente memoria son:<br/><br/>- 1. Tipificación del nicho ecológico.- Desde dos perspectivas bien diferenciadas, una trófica y otra espacio-temporal. La dimensión trófica ...
Cardador Bergua, Laura (Date of defense: 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 (Date of defense: 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 ...
Esteve Cavaller, Manuel (Date of defense: 2005-02-25)
Long-term data from underwater video recordings in the wild and in semi-natural channels are used to describe and compare the reproductive behaviour of fishes in the Salmoninae subfamily. The thesis is ...
Vighi, Morgana (Date of defense: 2016-01-19)
Cetaceans have historically been object of heavy exploitation, and are still currently subject to different threats. For conservation and management purposes, most of the large cetacean populations have ...