Browsing by Subject "59"
Now showing items 41-60 of 343
Biological interactions between fish and jellyfish in the northwester Mediterranean
Jellyfish are important components of marine ecosystems, being a key link between lower and higher trophic levels. Jellyfish blooms occur sporadically and unpredictably in coastal areas and often have important socio-economic ...
Biological rhythms in the Norway lobster (Nephrops Norvegicus L.) : Ecological modulation and genetic basis = Ritmos biológicos en la cigala (Nephrops norvegicus L.) : modulación ecológica y bases genéticas
Nephrops norvegicus is an important fishery resource for Europe. Its rhythmic burrowing behavior is strictly related to catchability. Here I studied such behavior under laboratory conditions. I investigated the combined ...
Biología de la reproducción de los míridos depredadores "Macrolophus pygmaeus" y "Nesidiocoris tenuis"
M. pygmaeus y N. tenuis son depredadores polífagos nativos de la región mediterránea que actualmente se utilizan en el control biológico de moscas blancas y otras plagas de los cultivos de hortalizas. Los cultivos de ...
Biología y dinámica poblacional del rorcual común ("Balaenoptera physalus") en las aguas atlánticas ibéricas
La presente tesis recoge los resultados de la investigación desarrollada por el autor durante los años 1978-1984 en los ejemplares de rorcual común capturados en las factorías balleneras españolas, así como estudios ...
Biology and phylogeography of the black sea urchin Arbacia lixula (Echinoidea: Arbacioida) / Biología y filogeografía del erizo de mar negro Arbacia lixula (Echinoidea: Arbacioida)
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 ...
Biology, ecology and ecophysiology of the box jellyfish Carybdea marsupialis (Cnidaria: Cubozoa) = Biologia, ecologia i ecofisiologia de la cubomedusa Carybdea marsupialis (Cnidaria: Cubozoa)
Over the last years, the sightings of the cubomedusa Carybdea marsupialis have increased in the Mediterranean Sea and this has been linked to an increase in its abundance. Consequently, this phD thesis addresses some ...
Bird population dynamics in the wintering season: the case of the mediterranean Gull Larus melanodephalus = Dinàmiques poblacionals en ocells durant la hivernada: el cas de la Gavina Capnegra Larus melanocephalus
The winter period is typically associated with harsh weather conditions and reduced food availability, which may lead to increased mortality. In birds, a common strategy to avoid such risks is to migrate to more favourable ...
Birds as Bioindicators of Pollution in Aquatic and Terrestrial Environments
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 ...
Brain changes underlying the long-term effects of a single previous exposure to emotional or systemic stressors in rats: a view from the hypothalamic-pituitary-adrenal axis
Estímuls estressants bàsicament emocionals, com la immobilització en taula (IMO), exerceixen efectes a llarg termini sobre l'activitat de l'eix hipotalàmic-pituïtari-adrenal (HPA) en rates adultes. Aquests efectes es ...
Calidad de huevos y larvas según manejo de reproductores de la cabrilla arenera ("Paralabrax maculatofasciatus", Steindachner, 1868)
El presente estudio caracteriza la población de la cabrilla <i>Paralabrax maculatofasciatus</i> en Bahía de La Paz,(B.C.S., México) como un reproductor asincrónico, con un largo periodo de desove que se prolonga de Enero ...
Cambios en la ecología trófica de los depredadores apicales del Mar Argentino durante el Holoceno
El Mar Argentino ha sufrido un impacto humano creciente desde el Holoceno medio hasta hoy en día, fruto del cual se han producido importantes cambios en los niveles más altos de la red trófica. Las actividades extractivas ...
Capilarización y tipos de fibras en la musculatura esquelética de aves
Se estudió, mediante métodos histoquímicos, la musculatura esquelética de 4 especies de aves. Se analizaron las características metabólicas de los diferentes tipos de fibras, su inervación, distribución y morfometría; así ...
Caracterización de la topografía dental en la tribu Papionini: Inferencias alimentarias en los cercopitecinos del Plio-Pleistoceno de Sudáfrica
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 ...
Cellular mechanisms behind vertebrate limp outgrowth
In this work we use a novel in vivo imaging technique and cell behaviour analysis to investigate the cellular basis of limb bud elongation. Recently, it has become clear that oriented cell activities must be involved in ...
Charipinae Worldwide Revision with special attention to Alloxysta and Phaenoglyphis genera (Hym.: Cynipoidea: Figitidae)
Members of the subfamily Charipinae (Hymenoptera: Cynipoidea: Figitidae) are secondary parasitoids of aphids via Aphidiinae (Hymenoptera: Braconidae) and Aphelininae (Hymenoptera: Aphelinidae) and secondary parasitoids of ...
Chemical and microbial ecology of thc demosponge Aplysina aerophoba = Ecología química y microbiana de la demosponja Aplysina aerophoba
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 ...
Climate change and the expansion of thermophilic fishes in the northwestern Mediterranean: the importance of studying condition and reproduction to understand the increase in their abundance
A direct consequence of sea warming in the Mediterranean is a increase in the abundance of thermo-tolerant species fish species such as Sphyraena viridensis, Pomadasys incisus, Pomatomus saltatrix and Trachinotus ovatus. ...
Cognition in ungulates: a new perspective in the evolutionary field
[eng] The study of animal cognition has advanced greatly over the century. We now know that many cognitive processes are shared among several species in the animal kingdom. The interest over the evolution of behaviour and ...
Cognitive challenges in captive chimpanzees: behavioral and welfare implications and influence of personality
The majority of chimpanzees living in captivity will remain in this situation for life. Reintroducing them to their natural habitats is extremely challenging, even in rescue and rehabilitation centers in their countries ...
Colémbolos ("Collembola, insecta") edáficos de encinares de la Serra de I'Obac y la Serra de Prades (Sierra Prelitoral Catalana). Efectos de los incendios forestales sobre estos antrópodos
Se han estudiado las comunidades de microartrópodos edáficos, y de colémbolos en particular, de dos encinares de la Serralada Prelitoral Catalana: La Serra de l'Obac y la Serra de Prades. El estudio se ha llevado a cabo ...
