Modeling the Population Dynamics of the Red Swamp Crayfish (Procambarus clarkii) in Doñana: Application to the Harvesting Strategies

The aim of this work is to propose an alternative management and control strategy of crayfishing Procambarus clarkii in the Doñana area. A simulation model was developed (Stella 8.0) to evaluate the effects of different fishing effort on crayfish populations during certain times of the year. Then different management options were simulated: Strategy 0: No fishing activity, Strategy 1: Obtaining the maximum yield of crayfish following the current fishing effort regulations, and Strategy 2: Obtaining the maximum yield of crayfish by restricting the fishing effort to the period of the greatest production. The model explained 73.68% of the variance in population biomass. A review and resetting of the crayfishing regulations in this area according to the periods proposed in Strategy 2, was recommended. This management proposal in the developed model was the one that ensures sustainable yields at the same time that preserves biodiversity by restricting the harvesting of crayfish to rice fields and channels from April to Septembe

Interactive Web platform for encouraging reader comprehension

This is an electronic version of the paper presented at the IADIS International Conference WWW/Internet 2003, ICWI 2003, held in Algarve on 2003This paper shows a web tool designed to encourage an active reader comprehension. Being a web-technology based system, it allows easy access for a wide number of users around the world, while at the same time it is easy to update. The system may be used by teachers who create exercises, “validators” who check them before being published and students who can complete these exercises at school or at home. Many of the classical grammar and vocabulary exercises will be seen now by the students as a game, in a similar way to crosswords. Moreover instant answers will be provided. This tool allows teachers not only to create interactive and guided reading exercises, but also to perform statistic follow-ups and global evaluations over a great population of readers. Feed-back has been preponderated so as to give the students the possibility to auto-evaluate their progress

Data from: Evolutionary and demographic history of the Californian scrub white oak species complex: an integrative approach

Understanding the factors promoting species formation is a major task in evolutionary research. Here, we employ an integrative approach to study the evolutionary history of the Californian scrub white oak species complex (genus Quercus). To infer the relative importance of geographical isolation and ecological divergence in driving the speciation process, we (i) analyzed inter- and intra-specific patterns of genetic differentiation and employed an approximate Bayesian computation (ABC) framework to evaluate different plausible scenarios of species divergence. In a second step, we (ii) linked the inferred divergence pathways with current and past species distribution models, and (iii) tested for niche differentiation and phylogenetic niche conservatism across taxa. ABC analyses showed that the most plausible scenario is the one considering the divergence of two main lineages followed by a more recent pulse of speciation. Genotypic data in conjunction with species distribution models and niche differentiation analyses support that different factors (geography vs. environment) and modes of speciation (parapatry, allopatry and maybe sympatry) have played a role in the divergence process within this complex. We found no significant relationship between genetic differentiation and niche overlap, which probably reflects niche lability and/or that multiple factors have contributed to speciation. Our study shows that different mechanisms can drive divergence even among closely related taxa representing early stages of species formation and exemplifies the importance of adopting integrative approaches to get a better understanding of the speciation process

Input files used for Mantel tests

Input files for Mantel tests performed using the program ZT. These files include two indexes of niche overlap (D and I) between each pair of species and different estimates of interspecific genetic differentiation (Fst, Reynolds distance, G`st and Jost`s D) calculated for 16 nuclear (nuSSR) and 5 chloroplast (cpSSR) simple sequence repeat loci

Input files used for phylogenetic analyses in POPULATIONS

Input files used for neighbor-joining phylogenetic analyses implemented in the program POPULATIONS based on 16 nuclear (nuSSR) and 5 chloroplast (cpSSR) simple sequence repeat loc

Simple Sequence Repeat Data

This file contains the genotypes for 16 nuclear (nuSSR) and 5 chloroplast (cpSSR) simple sequence repeat loci and 812 individuals from six Californian scrub oak species (Quercus berberidifolia, Quercus durata, Quercus cornelius-mulleri, Quercus john-tuckeri, Quercus dumosa and Quercus pacifica) collected in 87 localities

Input files used for STRUCTURE analyses

Input files used for Bayesian analyses of genetic structure implemented in the program STRUCTURE. There is one file for each studied species (Quercus berberidifolia, Quercus durata, Quercus cornelius-mulleri, Quercus john-tuckeri, Quercus dumosa and Quercus pacifica) and the different hierarchical analyses performed for different subsets of species

Climate layers used for MAXENT analyses

Climate layers (asc. files) for the present and the last glacial maximum (LGM) used for MAXENT analyses. Two climate models (CCSM and MIROC) were used for projections to the LGM

Neighbor-joining phylogenetic trees

Neighbor-joining phylogenetic trees based on 16 nuclear (nuSSR) and 5 chloroplast (cpSSR) simple sequence repeat loc

Input file used for BAPS analyses

Input file used for Bayesian analyses of genetic structure implemented in the program BAPS