Search results for " enemy"
showing 10 items of 13 documents
Disentangling higher trophic level interactions in the cabbage aphid food web using high-throughput DNA sequencing
2017
International audience; The lack of understanding of complex food-web interactions has been a major gap in the history of biological control. In particular, a better understanding of the functioning of pest food-webs and how they vary between native and invaded geographical ranges is of prime interest for biological control research and associated integrated pest management. Technical limitations associated with the deciphering of complex food-webs can now be largely overcome by the use of high throughput DNA sequencing techniques such as Illumina MiSeq. We tested the efficiency of this next generation sequencing technology in a metabarcoding approach, to study aphid food-webs using the cab…
Dimensions of invasiveness: Links between local abundance, geographic range size, and habitat breadth in Europe's alien and native floras.
2021
Understanding drivers of success for alien species can inform on potential future invasions. Recent conceptual advances highlight that species may achieve invasiveness via performance along at least three distinct dimensions: 1) local abundance, 2) geographic range size, and 3) habitat breadth in naturalized distributions. Associations among these dimensions and the factors that determine success in each have yet to be assessed at large geographic scales. Here, we combine data from over one million vegetation plots covering the extent of Europe and its habitat diversity with databases on species' distributions, traits, and historical origins to provide a comprehensive assessment of invasive…
Key carabid species drive spring weed seed predation of Viola arvensis
2020
Volatiles from Maruca vitrata (Lepidoptera, Crambidae) host plants influence olfactory responses of the parasitoid Therophilus javanus (Hymenoptera, …
2019
Plants damaged by herbivores are known to release odors attracting parasitoids. However, there is currently no information how leguminous plants damaged by the pod borer Maruca vitrata attract the exotic larval parasitoid Therophilus javanus, which was imported into Benin from the putative area of origin of the pod borer in tropical Asia for assessing its potential as a biological control agent. In this study, we used Y-tube olfactometer bioassays to investigate T. javanus response towards odors emitted by four M. vitrata-damaged host plants: cowpea Vigna unguiculata, the most important cultivated host, and the naturally occurring legumes Lonchocarpus sericeus, Sesbania rostrata and Tephros…
Enemy recognition of Reed Warblers (Acrocephalus scirpaceus): threats and reproductive value act independently in nest defence modulation
2010
Organisms should respond more aggressively towards species perceived as a danger to their offspring, but intensity of defence may be gauged by the value of current offspring weighed against the value of future reproductive opportunities. We tested whether defensive responses of nesting reed warblers (Acrocephalus scirpaceus) are the result of an interaction effect between the type of stimulus confronted and the value of the warbler’s nesting attempt. We quantified the ability of reed warblers to discriminate among brood parasites, nestling predators and non-threatening species at different stages of the breeding cycle. We also determined whether variables that influence the value of offspri…
La "lotta" alla criminalità organizzata
2020
Il contributo considera possibilità, limiti e condizioni dell’intervento del diritto penale nell’ampio fronte delle misure di contrasto al crimine organizzato. Si nega in primo luogo che tale forma di criminalità abbia una natura meramente temporanea e contingente, e che dunque la relativa normativa di contrasto possa confinarsi ad una pur grave, ma sempre circoscritta stagione dell’emergenza. Si procede quindi con una verifica della materia alla luce delle due teorie del diritto penale del nemico e del diritto penale di lotta. La conclusione nega l’utilizzabilità di formule così generali, per ragioni di ordine costituzionale e di caratteri costitutivi dell’intervento penale, e si pronuncia…
Chi è il nemico?
2019
Attraverso una critica della tesi di Schmitt sul comandamento evangelico dell’amore per il nemico – si darebbe un tipo di nemico che ne va escluso – si cerca di mostrare come l’amore evangelico riguardi inequivocabilmente il caso della separazione e opposizione «estrema» – operi, per così dire, nello «stato d’eccezione» – e restituisca innanzitutto nel suo significato più radicale il concetto di nemico Through a critique of Schmitt's thesis on the evangelical commandment of love for the enemy – an excluded type of enemy would be given – an attempt is made to show how evangelical love unequivocally concerns the case of "extreme" separation and opposition – operate, so to speak, in the "state…
Emergencia y garantías (en el pensamiento jurídico de Luigi Ferrajoli)
2011
Abstract: Along with Spain and United Kingdom, Italy has suffered a terrible period of political violence between 1970 and 1982 with hundreds of killings. In this paper I analyse the origins of Luigi FERRAJOLI’s theory of legal guarantee and his criticisms to Italian legislation against terrorism of that time. Therefore, I shed light on three different understanding of such a theory and I offer a review of that legislation that he labelled as «the subsystem of exception ».Moreover I will apply this conception of «special» criminal law to two famous trials against militants of a group of the extreme left. According to FERRAJOLI, these trials have been an instance of the paradigm of political…
Pre-release risk assessment of the egg-parasitoid Gryon pennsylvanicum for classical biological control of Leptoglossus occidentalis.
2013
Leptoglossus occidentalis Heidemann (Heteroptera: Coreidae) is a North American conifer seed pest that was accidentally introduced to Europe. In the Mediterranean area, it threatens the production of Pinus pinea Linna- eus seeds. The egg-parasitoid Gryon pennsylvanicum (Ashmead) (Hymenop- tera: Platygastridae), the main natural enemy in the native range of L. occidentalis, was imported from British Columbia to Italy. Pre-release risk assessments were made under quarantine conditions by no-choice tests conducted with na€ıve and experienced G. pennsylvanicum offering single eggs of target and non-target species for varying exposure times (1, 4, 48 h). G. pennsylvanicum successfully parasitize…
Gérer la haine, fabriquer l’ennemi. Grecs et Carthaginois en Sicile entre les Ve et IVe siècles av. J.-C.
2012
Managing hate, creating the enemy. Greeks and Carthaginians in Sicily between the Vth and IVth century B. C. This paper’s aim is to consider the historiographic perception of the Carthaginians as the typical and utmost enemy of the Greeks in Sicily, between the end of the Vth and the beginning of the IVth century B. C. The focus is put on the ways the enemy is fabricated and hate managed, through the peculiar part given the Carthaginians by Diodorus in the sieges of Selinous and Motya. In these narratives, the role of hate is fundamental to define the relationship between cultural identity and alterity and between reciprocity and asymmetry.