Universitat de Barcelona
Now showing items 123-142 of 147
This thesis includes several research works on population dynamics and conservation of seabirds in two small islands of the western Mediterranean: the Columbretes Islands (Castellón) and the island of Benidorm (Alicante). ...
L’objectiu d’aquesta tesi és avançar en el coneixement de l’ús que els meso-mamífers fan del paisatge mediterrani amb diferents nivells d’urbanització i de quina manera les variacions en aquest s’associen a variacions en ...
Los retinoides, también conocidos como vitamina A, son compuestos esenciales para muchas funciones biológicas. Los retinoides se clasifican entre los biomarcadores apropiados para el control de los contaminantes ambientales ...
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 subfamílies (Aspicerinae ...
El present treball parteix de la base d'estudi dels exemplars de la Família Triglidae capturats dintre del Programa de Recerca anomenat Fundaments for the Restructuration of the Demersal Fisheries in the Pacific Mexican ...
The spatial and temporal variability of migratory phenology of <i>Ciconia ciconia, Cuculus canorus, Apus apus, Hirundo rustica</i> and <i>Luscinia megarhynchos</i> were studied by means of 44000 records for 1400 spanish ...
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 divided into five ...
The thesis research concerned evolutionary ecology and community ecology of amphibians in two different areas of a Mediterranean region. The goal of the research was to test how anuran species coexist along a lentic ...
Molt is the process of plumage renewal by which birds maintain and adjust its functionality throughout their lifecycle. Multiple elements have been tackled in bird molt research (timing, duration, sequence, intensity, ...
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 the most speciose ...
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 chains. Sometimes, ...
Los Moluscos Opistobranquios, en relación a la reducción o incluso pérdida de la concha, han desarrollado múltiples y sofisticados métodos de defensa (incluyendo la defensa química) que les han permitido sobrevivir sin ...
Distinguishing population units of small cetaceans continuously distributed in a widespread area is challenging, but critical for their conservation and management. The common dolphin (genus Delphinus) has a wide distribution ...
En la present memòria s'analitzaran els aspectes que fan referència a les relacions territorials intra/interspecífiques de "Sturnus vulgaris" i "Sturnus unicolor", i les seves conseqüències en el marc reproductor. D'una ...
El uso de señales múltiples de calidad es común en numerosas especies, pero este hecho no es fácil de explicar. Las presiones fluctuantes del ambiente podrían tener un rol importante en el origen y mantenimiento de las ...
The Doctoral Thesis entitled "the glenohumeral joint of hominoid primates: locomotor Correlates, anatomical variation and evolution" is about the anatomical adaptations in the shoulder joint (glenohumeral joint) of hominoid ...
Over time, many studies about deer antlers, based on classical morphometry, have been done. The present study propose a new perspective on the study of Iberian red deer antlers (Cervus elaphus hispanicus) from Sierra Morena ...
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 activities (specially ...
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 been categorized ...
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 s’analitzen aspectes poc ...
