Search results for "evolution"
showing 10 items of 11096 documents
Plant-herbivorous beetle networks : molecular characterization of trophic ecology within a threatened steppic environment
2015
DNA barcoding facilitates many evolutionary and ecological studies, including the examination of the dietary diversity of herbivores. In this study, we present a survey of ecological associations between herbivorous beetles and host plants from seriously threatened European steppic grasslands. We determined host plants for the majority (65%) of steppic leaf beetles (55 species) and weevils (59) known from central Europe using two barcodes (trnL and rbcL) and two sequencing strategies (Sanger for mono/oligophagous species and Illumina for polyphagous taxa). To better understand the ecological associations between steppic beetles and their host plants, we tested the hypothesis that leaf beetl…
What is effective pedagogy for multilingual learners? Observations of teaching that challenges inequity-the OPETAN project in England
2020
There is little empirical evidence regarding how best to prepare general education teachers for the challenge of supporting multilingual learners. This is both regarding helping learners develop the language of schooling, and achieving academic success (Faltis & Valdés, 2016). Similarly, little is known about what in-service teachers should know, and what pedagogical perspective they should adopt, to achieve these aims (Faltis & Valdés, 2016; Takanishi & Le Menestrel, 2017). However, there is a promising line of research that proposes an observation tool to evaluate classroom pedagogy: ‘The Standards for Effective Pedagogy’ (the ‘Standards’ 2014; Teemant, 2015). The OPETAN project (Observat…
The ALHAMBRA survey: Bayesian photometric redshifts with 23 bands for 3 deg2
2014
A. Molino et al.
Binding analysis of Bacillus thuringiensis Cry1 proteins in the sugarcane borer, Diatraea saccharalis (Lepidoptera: Crambidae).
2015
Sugarcane borer (Diatraea saccharalis, F.) is an important corn pest in South America and United States. The aim of the present study was to analyze the susceptibility and binding interactions of three Cry1A proteins and Cry1Fa in a Brazilian D. saccharalis population. The results showed that Cry1Ab was the most active, followed by Cry1Ac, Cry1Fa and Cry1Aa. All Cry1-biotinylated proteins tested bound specifically to the D. saccharalis brush border membrane vesicles (BBMV). Heterologous competition assays showed shared binding sites for all Cry1A proteins and another one shared by Cry1Fa and Cry1Ab. Thus, pyramiding Cry1Aa/Cry1Ac and Cry1F proteins would be a recommended strategy for managi…
Victims of Racket: Entrepreneurs and Traders Dealing with Cosa Nostra, Ndrangheta, and Camorra
2015
This work proposes research on a still unexplored psychical world: thoughts, emotions, and real events experienced by racket victims of the three largest criminal organizations of the South of Italy: Mafia, Camorra, and Ndrangheta. The purpose is to understand the multifaceted psycho-anthropological and social issues criminal organizations have settled on, and particularly which psycho-relational dynamics and sociocultural codes come into play in the complex and controversial relationship between victim and criminal system, between victim and support systems. With entrepreneurs and tradesmen victims of organized crime, we have analyzed lived experiences - in particular fear - and psychologi…
Challenges in the use of Near Infrared Spectroscopy for improving wood quality: A review
2018
Aims of study: Forestry-related companies require quality monitoring methods capable to pass a large number of samples. This review paper is dealing with the utilization of near infrared (NIR) technique for wood analysis.Area of study: We have a global point of view for NIR applications and characterization of different kind of wood species is considered.Material and methods: NIR spectroscopy is a fast, non-destructive technique, applicable to any biological material, demanding little or no sample preparation. NIR spectroscopy and multivariate analysis serve well in laboratories where the conditions are controlled. The main challenges to NIR spectroscopy technique in field conditions are mo…
Découverte d'Arthropodes et de bivalves inédits dans le Permien continental (Lodévois, France)
1997
Resume Des Triopsides, Conchostraces, Insectes, Bivalves, pistes et terriers d'Arthropodes sont decouverts dans le Groupe saxonien considere longtemps comme quasi azoique. Ces fossiles sont pour la plupart inedits, au niveau de l'espece, de la famille et de l'ordre. Chez les Insectes, de nouveaux taxons comblent des lacunes temporelles considerables, allant du Jurassique au Permien. Les informations recueillies vont permettre de rediscuter certaines phylogenies et de reapprecier l'impact de la crise fini-permienne sur cette classe. La repartition des Insectes et des Conchostraces suggere de donner un âge Koungourien a Tatarien (Leonardien a Capitanien) au ≪ Saxonien ≫.
RESEARCH PAPER: Multiple Sexual Ornamentation Signals Male Quality and Predicts Female Preference in Minnows
2010
Sexual ornamentation often consists of multiple components. Different sexual signals may indicate different aspects of mate quality or reflect quality in different time scales. On the other hand, same signals can have a dual function and are used both in male–male competition and courtship. Many fish species are capable of rapidly altering their colouration (ephemeral colour changes), but this capability is usually ignored in sexual selection studies. Here, we used experimentally manipulated social environments to study the ephemeral colour changes in multicomponent sexual signals of male minnows (Phoxinus phoxinus) during male–male competition and female choice. We found that the dominant …
Intraguild interactions between egg parasitoids: window of opportunity and fitness costs for a facultative hyperparasitoid.
2013
We investigated intraguild interactions between two egg parasitoids of Nezara viridula (L.) (Heteroptera: Pentatomidae), Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) and Trissolcus basalis (Wollaston) (Hymenoptera: Platygastridae), as the former has the potential to be a facultative hyperparasitoid of the latter. We assessed the suitability of N. viridula eggs for the development of O. telenomicida as a function of egg age when they were unparasitized, or had been attacked by T. basalis at different times prior to exposure to O. telenomicida females. Ooencyrtus telenomicida can exploit healthy N. viridula host eggs up to 5 days of age, just prior to the emergence of N. viri…
Cultural Competences of International Students: Its Role on Successful Sociocultural and Psychological Adaptation
2014
This chapter addresses the study of cultural competences involved in the successful adaptation of a particular group of migrants: international students. Cultural competences are skills that people display when facing cultural diversity and have been found to predict job performance and academic achievement of those who have to interact in different contexts other than their own. This chapter aims to respond three questions that students consider when studying abroad: ‘What should I do to have a successful life?’, ‘How prepared are members of the host culture to receive me?’, and, ‘Who are the most successful international students?’ The first segment introduces the role of acculturative st…