Now showing items 61-80 of 147

    Chemical and microbial ecology of thc demosponge Aplysina aerophoba = Ecología química y microbiana de la demosponja Aplysina aerophoba 

    Sacristán Soriano, Oriol (Date of defense: 2013-10-04)

    Phylum Porifera (Grant, 1836) are sessile metazoans with a differentiated inhalant and exhalant aquiferous system with external pores. Lacking a tissue grade of construction, sponges can reach two well-differentiated ...

    Las chinches de los cereales (Eurygaster Fam. Scutelleridae; Aelia Fam. Pentatomidae): importancia y efectos en el trigo duro (Triticum turgidum var. durum L.), especialmente en Cerdeña (Italia) = Wheat bugs (Eurygaster Fam. Scutelleridae; Aelia Fam. Pentatomidae): importance and effects on durum wheat (Triticum turgidum var. durum L.), especially in Sardinia (Italy) 

    Salis, Luigi (Date of defense: 2013-07-26)

    No existían estudios sobre la presencia de chinches en el trigo duro en Italia, incluida la Isla de Cerdeña. Según los niveles de infestación de las chinches de los cereales habrá un porcentaje más o menos alto de granos ...

    Avian Sex Ratio and Sex-Specific Traits in Offspring = Razón de sexos y atributos sexuales de la descendencia en aves 

    Martínez Benito, María (Date of defense: 2013-09-05)

    Sex allocation (SA) refers to the proportion of resources allocated to male and female reproduction; relatedly, sex ratio (SR) refers to the numbers of each sex that are produced. Hence, their scientific study deals with ...

    Revisió taxonòmica mundial de la família Triglidae (Pisces, Scorpaeniformes) 

    Cerro i Ramon, Lluís del (Date of defense: 1997-09-10)

    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 ...

    Biology and phylogeography of the black sea urchin Arbacia lixula (Echinoidea: Arbacioida) / Biología y filogeografía del erizo de mar negro Arbacia lixula (Echinoidea: Arbacioida) 

    Wangensteen Fuentes, Owen S. (Date of defense: 2013-07-05)

    The black sea urchin Arbacia lixula (Linnaeus, 1758) is one of the most abundant sea urchins in the Mediterranean. Despite its increasingly recognized ecological significance, including the ability to create and maintain ...

    Genes, environment and their interplay in the development of psychopathological characteristics and their neuroimaging correlates in general population / Genes, ambiente y su interacción en el desarrollo de características psicopatológicas y sus correlatos de neuroimagen en poblaicón general 

    Alemany Sierra, Silvia (Date of defense: 2013-04-15)

    The present dissertation, which can be framed in the fields of behavioural and psychiatric genetics, was aimed to study how early environmental factors such as parental negativity and childhood adversity, directly or in ...

    Genetic variation of the X chromosome and the genomic regions of Coagulation Factors VII and XII in human populations: Epidemiological and evolutionary considerations 

    Athanasiadis, Georgios (Date of defense: 2010-07-14)

    In this work we have analyzed the variation of (i) several X chromosome polymorphic Alu insertions and (ii) several SNPs and microsatellites within and around the genomic regions of the genes coding for coagulation factors ...

    Ús de l'espai de l'hàbitat en el sisó (Tetrax tetrax) durant el període reproductor: aspectes aplicats a la conservació en hàbitats agraris 

    Ponjoan Thäns, Anna (Date of defense: 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 s’analitzen aspectes poc ...

    Offshore wind energy and birds: Integrating assessment tools in space and time / Energia eòlica marina i aus: integració de les eines d’avaluació a l’espai i el temps 

    Jiménez García, Isadora Christel (Date of defense: 2012-12-11)

    Amongst the available renewable energy sources, offshore wind energy is having a rapid expansion. Renewable energies are viewed as an environmental benign alternative to the energy production based on fossil fuels, but the ...

    Indicadores del bienestar animal y programas de enriquecimiento en especies de mamíferos en cautividad. / Animal welfare indicators and environmental enrichment programs in species of wild mammals in captivity 

    Soriano Jiménez, Ana Isabel (Date of defense: 2013-02-08)

    En la actualidad, los cuatro objetivos de los zoos modernos son la educación, la investigación, la conservación y el ocio. Esta tesis se centró en la evaluación de algunos indicadores de bienestar animal en cuatro especies ...

    Ecología química en el bentos marino de la Antártida: productos naturales y defensa química en esponjas hexactinélidas, corales blandos y ascidias coloniales 

    Núñez Pons, Laura (Date of defense: 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 is particularly ...

    Revisió taxonòmica de dues subfamílies de figítids i posició filogenètica del gènere "Acanthaegilips" (Hymenoptera; Figitidae: Aspicerinae, Thrasorinae, Anacharitinae) 

    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 subfamílies (Aspicerinae ...

    The Colours of Choice: Multiple signalling through feather colouration / Ornamentos múltiples: Mecanismos, función y evolución. 

    Mateos González, Fernando (Date of defense: 2012-09-07)

    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 ...

    Dieta y adaptaciones ecológicas de las poblaciones humanas del Pleistoceno Medio y Superior 

    Pinilla Pérez, Beatriz (Date of defense: 2012-11-16)

    Durante el Pleistoceno Medio y Superior ocuparon Europa al menos tres poblaciones: los heidelbergensis, los neandertales y los humanos modernos. La economía de estas sociedades habría dependido en última instancia de los ...

    A global wanderer: Biology, phylogeography and resilience of the introduced ascidian "Styela plicata" / Història d’una introducció global: biologia, filogeografia i susceptibilitat a factors ambientals de l’ascidi cosmopolita "Styela alicata" 

    Pineda Torres, Mari Carmen (Date of defense: 2012-09-25)

    "Styela plicata" is a solitary ascidian introduced all around the world by ship traffic and seems to have many of the required features to become invasive. The main goal of this PhD thesis was to increase our knowledge on ...

    Birds as Bioindicators of Pollution in Aquatic and Terrestrial Environments 

    Cotín Martínez, Javier (Date of defense: 2012-12-21)

    Birds have been widely used as bioindicators. In this study we face the use of birds as bioindicators of metal pollution in two different scenarios of contamination: one that takes place in an aquatic environment, the Ebro ...

    Factors que afecten l’èxit d’expansió de poblacions d’aus en medis transformats per l’home: l’arpella "Circus aeruginosus" a la Vall de l’Ebre Factors affecting expansion success of bird populations in human-transformed environments: the marsh harrier Circus aeruginosus in the Ebro Valley 

    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 through space ...

    Antarctic marine benthic invertebrates: chemical ecology, bioactivity and biodiversity / Invertebrados bentónicos marinos de la Antártida: ecología química, bioactividad y biodiversidad 

    Taboada Moreno, Sergio (Date of defense: 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 aportaciones: (i) por ...

    Complex Models of Genetic and Environmental Influences on Human Cognition. Implications for Functional Psychoses / Modelos complejos de las influencias genéticas y ambientales en la cognición humana. Implicaciones para las psicosis funcionales 

    Goldberg, Ximena (Date of defense: 2012-06-18)

    The general construct of human cognition implies a series of mental processes by means of which human interpret and consequently act on the world that surrounds them (Sternberg y Mio, 2009). During the last decades, the ...

    Habitat management and the use of plant-based resources for conservation biological control / Gestión del hábitat y papel de los recursos vegetales en el control biológico por conservación 

    Pumariño Romero, Lorena (Date of defense: 2012-05-04)

    Modern agriculture has been focused on very intensive agricultural systems that depend on external inputs such as fertilizers or pesticides. These practices have lead to a simplification of the landscape and a decline of ...