Tag shedding estimation in Palinurus elephas (Fabricius, 1787)

In this paper a numerical method for tag shedding calculation from double tagging data was used to estimate the tag loss rate in Palinurus elephas from capture-mark-recapture experiments. Four consecutive experimental surveys during years 1999-2002 inside the Columbretes islands marine reserve (CIMR) were carried out and the captured spiny lobsters were dorso-laterally double-tagged with T-bar anchor tags on both sides between the first and second abdominal segments. The recaptures during the following years (2000-2008) were recorded and the evolution of the proportion of single- and double-tagged specimens was analysed. The immediate tag loss produced after tagging could not be accurately modelled, but in view of the results is believed to be low. The probability of tag loss per year was estimated in 6% (sexes combined). The factors causing this tag loss and the repercussion of this rates of shedding on further studies are examine

Estudio y control automático de la operación de extrusión de baldosas cerámicas

The ever-larger tile sizes demanded by the market, the higher quality requirements, and the increasingly similar installation to that of pressed products make it necessary to narrow the tolerance limits of final extruded tile size in order to maintain the product’s competitiveness. The results of this study show that, though mixing water has a great influence on drying shrinkage, it hardly affects extruded tile firing shrinkage. This indicates that control of the water added in the extrusion process is indispensable in order avoid variations in drying shrinkage and, thus, to assure good dimensional stability of the end produc

Automated Analysis of Large-Scale NMR Data Generates Metabolomic Signatures and Links Them to Candidate Metabolites.

Identification of metabolites in large-scale <sup>1</sup> H NMR data from human biofluids remains challenging due to the complexity of the spectra and their sensitivity to pH and ionic concentrations. In this work, we tested the capacity of three analysis tools to extract metabolite signatures from 968 NMR profiles of human urine samples. Specifically, we studied sets of covarying features derived from principal component analysis (PCA), the iterative signature algorithm (ISA), and averaged correlation profiles (ACP), a new method we devised inspired by the STOCSY approach. We used our previously developed metabomatching method to match the sets generated by these algorithms to NMR spectra of individual metabolites available in public databases. On the basis of the number and quality of the matches, we concluded that ISA and ACP can robustly identify ten and nine metabolites, respectively, half of which were shared, while PCA did not produce any signatures with robust matches

Double tagging experiments and tag loss in Palinurus elephas

Publicado

Hipoactivación en el área parahipocampal durante una tarea de “codificación/ recuperación”: estudio diferencial mediante RMf de pacientes con EA y DCL

Vuitenes Jornades de Foment de la Investigació de la FCHS (Any 2002-2003

Isotopic tissue fractionation in captive and wild lobsters Palinurus elephas (Fabricius, 1787)

Isotopic fractionation δ13C and for δ15N of the spiny lobster Palinurus elephas has been tested in four tissues: tail and leg muscle, telson and hemolymph. Comparison of tissue fractionation factors among tissues in two groups of lobsters, captive (controlled diet) and wild, show lower intra-individual variability in captive than in wild individuals. Statistical analysis (PERMANOVA) was performed to check for significant differences in δ13C and δ15N isotopic signatures between tissues and treatments. Results show significant differences in the δ13C and δ15N isotopic composition among the four tissues analyzed. Legs are the most enriched tissue in δ15N, followed by muscle, hemolymph and telson in both captive and wild specimens. For δ13C the sequence is muscle > legs> hemolymph ~ telson. The fractionation or enrichment factor for δ 13C is 0.87‰ and 1.17‰ and for δ15N 1.99‰ and 2.38‰, in captive and wild lobsters respectively. Leg muscle presents the lowest variability at isotopic level for N and telson for C. Telson presents differences for N and C in both captive and wild lobsters (Mann-U Whitney p<0.05). Hemolymph and leg only present statistical differences for N between captive and wild individuals. In the first study of tissue isotopic fractioning of a spiny lobster species we conclude that leg muscle is the best tissue for studying P. elephas trophic dynamics applying non-invasive technique