Universitat de Barcelona
Now showing items 7-26 of 174
This thesis covers three important aspects of Antarctic heterobranchs: ecology, taxonomy, and systematics. The first section deals with ecological interactions of several nudibranchs. In Chapter 1, we chemically characterize ...
El objetivo global de esta tesis es ampliar el conocimiento sobre la biología y ecología del rorcual común, con foco principal en la población de rorcual común de Islandia. Dadas las numerosas incógnitas que siguen existiendo ...
La entrada en el medioambiente de xenobióticos, procedentes de la actividad humana, que son biológicamente activos y de difícil eliminación, representa un grado de estrés que, a menudo, resulta inaceptable por los organismos ...
La riqueza de orquídeas en Colombia alcanza una cifra de 4.270 especies, sin embargo, nuevos hallazgos sugieren no haber llegado a un punto de inflexión. La condición epífita en el 69% de sus especies y su ubicación en el ...
This work is at the crossroads where conservation problems, arising from the biodiversity loss and environmental crisis, meet the difficulties of applying research outcomes in conservation practice, framed in a sustained ...
La mortalitat per captura accidental en les pesqueres de palangre representa una de les principals amenaces per a nombroses espècies d’ocells marins a nivell mundial. En el Mediterrani, aquesta mortalitat esta afectant ...
The alarming rate of marine biodiversity loss calls for new strategies of understanding and accounting for human-nature relationships. Anthropogenic impacts are the main drivers of changes in coastal and marine systems ...
Our world is subjected to a panoply of drivers of change. In this context, the understanding on how our biosphere resists, absorbs or is altered by the changes, appears as a hot question in ecology. In this respect, two ...
The rates at which allochthonous species are introduced and become invasive worldwide are unprecedented and accordingly, the number of studies on invasion biology have increased during the past years. However, biological ...
[eng] During critical periods of development, psychosocial stress experiences may alter key neural networks of the human brain, with long-lasting effects on behavior and mental health. However, the specific biological ...
En aquesta tesi doctoral s’ha estudiat la distribució, acumulació, funció i biosíntesi dels tocoferols i tocotrienols (vitamina E) en llavors, així com els seus mecanismes de control. En primer lloc es van estudiar les ...
Los depredadores marinos pueden cambiar su dieta a través del tiempo como consecuencia de cambios antropogénicos y naturales, por lo que un punto de referencia histórico aporta información básica y necesaria para comprender ...
Schizophrenia is a severe and complex mental disorder that results in an inability to cope with life’s ordinary demands and routines. Normally, it appears in late adolescence, more frequently and developing earlier in ...
El trabajo que se presenta en esta Tesis Doctoral se centra en el estudio de la topografía dental de los molares superiores e inferiores de diversas especies de primates de la tribu Papionini. El objetivo general es ...
The study of past ecological changes is highly useful for understanding how ecosystems have responded to climate and human-induced disturbances. It is thus relevant in the context of climate change, as it allows several ...
The potential of natural products in general, and marine natural products in particular, as pharmacological entities has been widely demonstrated in recent years. Marine benthic ecosystems contain an extraordinary range ...
El maltrato infantil es un fenómeno muy complejo que afecta de manera integral al individuo y se asocia con diferentes problemas de salud mental en la infancia, adolescencia y adultez. Aunque el estudio del trauma relacional ...
The Pyrenean frog (Rana pyrenaica) is a Pyrenees endemic species, mostly distributed between Navarra and Aragón, and recently was described in few streams of France. The typical habitat of the species is mountain streams. ...
The biodiversity of a country is part of its natural wealth and the study of it is fundamental for a scientific researcher, such is the case of the Panamanian marine coasts in which there has not been an exhaustive taxonomic ...
[cat] La vespeta del castanyer, Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) és una espècie cedidògena originària de l'est de la Xina, que ataca tots els arbres del gènere Castanea (Fagaceae) col·lectant-se per ...
