Ara mostrant els elements 61-80 de 147
Sacristán Soriano, Oriol (Data de defensa: 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 ...
Salis, Luigi (Data de defensa: 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 ...
Martínez Benito, María (Data de defensa: 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 ...
Cerro i Ramon, Lluís del (Data de defensa: 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 ...
Wangensteen Fuentes, Owen S. (Data de defensa: 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 ...
Alemany Sierra, Silvia (Data de defensa: 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 ...
Athanasiadis, Georgios (Data de defensa: 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 ...
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 s’analitzen aspectes poc ...
Jiménez García, Isadora Christel (Data de defensa: 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 ...
Soriano Jiménez, Ana Isabel (Data de defensa: 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 ...
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 is particularly ...
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 subfamílies (Aspicerinae ...
Mateos González, Fernando (Data de defensa: 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 ...
Pinilla Pérez, Beatriz (Data de defensa: 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 ...
Pineda Torres, Mari Carmen (Data de defensa: 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 ...
Cotín Martínez, Javier (Data de defensa: 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 ...
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 through space ...
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 aportaciones: (i) por ...
Goldberg, Ximena (Data de defensa: 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 ...
Pumariño Romero, Lorena (Data de defensa: 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 ...