El fenómeno El Niño 1982-83 y sus efectos frente al Puerto del Callao

El fenómeno El Niño es una anomalía de la interacción océano atmósfera en gran escala, cuya interacción no es muy bien conocida. Se presenta con diferentes intensidades, con intervalos de 5 a 16 años y su duración es variable. Produce efectos biológicos económicos y sociales, pero aún no se conoce a cabalidad sus impactos ecológicos.

Respiratory electron transport activity in plankton: determinants and detection

Programa de doctorado en Oceanografía. La fecha de publicación es la fecha de lectura

Evaluation of three protein methodologies for marine plankton

[EN]Protein is an important biomass parameter and critical in the enzyme analysis of plankton. When plankton biomass is abundant, obtaining protein samples is not difficult. However, when biomass is a scarce quantity and it needs to be used for many other measurements, obtaining sufficient material for a protein sample is a challenge. If the protein analysis can be made on samples simultaneously prepared for other types of biochemical analyses, this challenge is partially mitigated. The objective of this research was to determine the optimal method for measuring protein content in plankton samples prepared for enzyme analysis.

Biodiversidad química del litoral canario

Programa de doctorado de Oceanografía, Bienio 2003-2005. La fecha de publicación es la fecha de lectura

Diversidad genética y estructura poblacional de caballa ("Scomber colias", Gmelin, 1789) en aguas del Atlántico y del Mediterráneo

Programa de doctorado: Oceanografía, Bienio 2007/09. La fecha de publicación es la fecha de lectura

Análisis de polifenoles en algas: implicación de estos compuestos en mecanismos para disminuir la toxicidad del cobre y regular la disponibilidad del hierro en microalgas

Programa de doctorado: Oceanografía. La fecha de publicación es la fecha de lectura.

Marine photosynthetic picoeukaryotes: community structure at different spatial scales

Programa de doctorado en Oceanografía. En portada: Institut de Ciènces del Mar. Instituto Español de Oceanografía. La fecha de publicación es la fecha de lectura

Big bang bifurcations in von Bertalanffy’s dynamics with strong and weak Allee effects

The main purpose of this work was to study population dynamic discrete models in which the growth of the population is described by generalized von Bertalanffy's functions, with an adjustment or correction factor of polynomial type. The consideration of this correction factor is made with the aim to introduce the Allee effect. To the class of generalized von Bertalanffy's functions is identified and characterized subclasses of strong and weak Allee's functions and functions with no Allee effect. This classification is founded on the concepts of strong and weak Allee's effects to population growth rates associated. A complete description of the dynamic behavior is given, where we provide necessary conditions for the occurrence of unconditional and essential extinction types. The bifurcation structures of the parameter plane are analyzed regarding the evolution of the Allee limit with the aim to understand how the transition from strong Allee effect to no Allee effect, passing through the weak Allee effect, is realized. To generalized von Bertalanffy's functions with strong and weak Allee effects is identified an Allee's effect region, to which is associated the concepts of chaotic semistability curve and Allee's bifurcation point. We verified that under some sufficient conditions, generalized von Bertalanffy's functions have a particular bifurcation structure: the big bang bifurcations of the so-called box-within-a-box type. To this family of maps, the Allee bifurcation points and the big bang bifurcation points are characterized by the symmetric of Allee's limit and by a null intrinsic growth rate. The present paper is also a significant contribution in the framework of the big bang bifurcation analysis for continuous 1D maps and unveil their relationship with the explosion birth and the extinction phenomena.

The flexible citizen: education and citizenship

This paper considers the recent focus on citizenship within education by taking curricular reform within Scottish secondary schooling and its linkage with higher education as a case study. In Scotland the Curriculum for Excellence reform places citizenship as one of the four main capacities that pupils must work towards as part of their education. This is echoed to some extent within higher education through the Enhancement Theme reforms and the focus on graduate attributes. A unifying theme in these reforms is the need for students to work across different disciplines, to develop a cross-disciplinary perspective on the world by, for example, considering issues of sustainability in relation to scientific or technological developments. In this model of curriculum development teaching staff are considered as agents of change, enabling learners to develop their sense of citizenship in response to a fast-paced world of innovation and change. This kind of change is objectified as a need that must be responded to and met if tomorrow’s citizens are to be able to not only cope, but thrive in the world in which they inhabit. As such, the citizen is positioned as an ongoing project, as something to be worked at and worked on. However, this kind of notion of agency cloaks an neoliberal ideological construction of the citizen as a flexible resource for society, and usually in relation to economic output. The paper seeks to subject this construction of the citizen to critical scrutiny in relation to the idea that, in education, learners are developing their ability to be creative and enquiring in order to be adaptive to change.

Aproximación teórica a la juridicidad

Pensar con cabeza propia es una obstinada prédica que a lo largo de muchos años de magisterio en el Derecho ha invocado el profesor José Iván Ortiz. Eso implica, por supuesto, sumergirse en largas y profundas reflexiones sobre los más diversos aspectos del saber, ahondar sobre las complejidades que conforman la suma requerida de conocimientos que pueden hacer del abogado el humanista que requiere esta ciencia. Pero ese conocimiento no es, no puede ser, la simple aprehensión de discursos elaborados, para recitarlos y reproducirlos sin la más mínima critica, sin la reelaboración que requiere una verdadera hermenéutica. Todo lo contrario: es un proceso lleno de imbricadas ramificaciones, una serie de fases constituida por los más diversos saberes. Por eso, este texto, breve y denso, aborda el proceso de conocimiento aplicado a la juridicidad, desde varios frentes: Lógica, Teoría del Conocimiento y Epistemología.

Ictiofauna de dos praderas de Posidonia oceanica (L.) Delile, 1813 con distinto grado de conservación

Ictiofauna de dos praderas de Posidonia oceanica (L.) Delile con distinto grado de conservación.