Search results for "Courts"
showing 10 items of 153 documents
Courtship song and immune function in the field cricket Gryllus bimaculatus
2003
It has been assumed that sexual ornaments have evolved to reveal males’ health and vigour for females. Choosy females may indirectly use ornaments as an indicator of the presence and effectiveness of genes for resistance against parasites. In this study we tested whether females of the Mediterranean field cricket, Gryllus bimaculatus, can use courtship song as a cue for choosing males with high immunocompetence, measured as encapsulation rate of nylon implants and lytic activity of haemolymph. We found that female crickets preferred courtship songs from males with a high encapsulation rate. Female crickets also had a tendency to prefer courtship songs with high tick rate and long high-frequ…
Le sollecitazioni delle Corti e l’inerzia del legislatore in tema di suicidio assistito. Un confronto tra Italia e Inghilterra
2019
Starting from the analysis of the decision of the Italian Constitutional Court on the ���Cappato case���, the essay is the occasion for a joint reflection between Italian constitutional law and comparative law on the subject of assisted suicide and euthanasia, which seems to determine the inertia of the legislators in the face of activism of the Courts, perpetually seeking a dialogue with the first. To suffer the most serious damage of these attitudes are the sick, who in this matter more than ever need certainty to the law.
Decoupled Acoustic and Visual Components in the Multimodal Signals of the Common Cuckoo (Cuculus canorus)
2021
Because of its parasitic habits, reproduction costs of the common cuckoo (Cuculus canorus) are mostly spent in pre-laying activities. Female costs are limited to searching host nests and laying eggs, whereas, males spend time in performing intense vocal displays, possibly with territorial purpose. This last aspect, together with a sexual plumage dimorphism, points to both intra- and inter-sexual selections operating within this species. One element triggering sexual selection is a differential fitness accrued by different phenotypes. Before analyzing possible sexual selection mechanisms operating in cuckoos, it is therefore necessary to verify whether there is a variability among male secon…
A female-produced short-range sex pheromone in the egg parasitoid Trissolcus brochymenae
2012
The potential for short-range sex pheromone communication by the egg parasitoid wasp Trissolcus brochymenae (Hymenoptera: Platygastridae) was investigated in closed arena bioassays. Males of this parasitoid showed more antennal drumming and more frequent mounting behaviour on 1- to 2-d-old virgin females compared with 8-d-old virgin females. Male copulation attempts were fewer with previously mated females than with virgin females. Males courted and made copulation attempts with 1- to 2-d-old female cadavers, but not with male cadavers or with female cadavers rinsed in organic solvents of different polarities. Male attraction to female cadavers was re-established by treating cadavers with a…
Breeding Tubercles, Papillomatosis and Dominance Behaviour of Male Roach (Rutilus rutilus) During the Spawning Period
2004
We studied the relationship between the breeding tubercle ornamentation (i.e. skin roughness) and male pre-spawning dominance and courtship behaviour in roach (Rutilus rutilus) within an experimental laboratory system. Sexually mature fish were caught during their migration to their spawning pond and their behaviours were studied in an artificial spawning arena. Males behaved naturally both in terms of male–male interactions and attempts to achieve spawnings. Males having many, large breeding tubercles (i.e. rough skin) were significantly more often dominant in our dyadic trials than those with smooth skin. The dominant male in the trial exhibited a more active courtship behaviour than its …
A test of male mating and hunting success in the kestrel: the advantages of smallness?
1996
We tested female choice for male wing and tarsus length and body mass in the kestrel (Falco tinnunculus), a species in which males average about 10% smaller than females. We also studied how male characters are related to their hunting success. In the laboratory, females preferred lighter males with shorter tarsi as mates, if the difference in those characters between competing males was larger than average. Lighter and shorter-winged males seemed to be better hunters than heavier and longer-winged males. Field observations in a year in which voles were scarce suggested that shorter-winged males were also better food providers in courtship feeding than longer-winged males,although in good v…
Female choice for male drumming in the wolf spiderHygrolycosa rubrofasciata
1997
Mate preferences in invertebrates have usually been studied with simultaneous choice exper- iments alone, which allows eVective detection of any preferences but does not tell much about the strength of inter-sexual selection. Under natural conditions females frequently have to rely on sequential choice, and choosy females may incur opportunity and direct costs such as loss of time when they reject a male. Female preference in the wolf spider Hygrolycosa rubrofasciata for two components of male courtship signalling, rate and volume, was investigated. Both of these characteristics were tested with a sequential choice set-up and the eVect of volume also with a simultaneous choice method. Femal…
Female choice in the kestrel under different availability of mating options
1992
Abstract Mate choice in relation to its fitness consequences on females was studied in kestrels, Falco tinnunculus , in western Finland. The breeding season is short with rapidly declining prospects of successful breeding, suggesting that females should make their mating decision quickly. On average, males arrived a few days before females, but late males arrived much later than early females. Pairs were usually formed within 2 days of male arrival, and only early males were available to early females. Options for female choice differed considerably in years of different kestrel density. In a good vole year, 1988, females had many males to choose from, but in poor vole years, 1989 and 1990,…
DOCS ICI, COURTS LÀ : UNE ALTERNATIVE DE DIFFUSION POUR LES FILMS REGIONAUX EN BOURGOGNE-FRANCHE-COMTÉ ?
2021
sous la direction de Christel Taillibert, Jean-Paul Aubert et de Cyril Laverger; International audience; Docs ici, courts là est un dispositif qui valorise les courts métrages et les documentaires produits et/ou réalisés en Bourgogne-Franche-Comté. À travers cette étude de cas, l’auteure rend compte de ses observations et de ses questionnements sur la portée alternative de ce dispositif qui se décline à plusieurs niveaux. Il est complémentaire ou alternatif aux modes de diffusion de films standards (salles de cinéma, festivals, télévision), lorsque les œuvres sont projetées dans des lieux « atypiques ». Mais sa portée alternative se révèle sur d’autres de ses aspects et actions qu’il met en…
I RUSTICA MUNERA DI CORIDONE (A MARGINE DI VERG., ECL. 2, 45-55)
2022
Within the second Eclogue, the rustica munera offered by Corydon to Alexis (vv. 45-55), while obeying a somewhat conventional plot, reveal a complex intertextual stratigraphy. Unexpectedly, δωροφόροι of di vine rank join the shepherd in paying homage to the ephebe, bringing bas kets full of lilies and a garland of flowers and herbs, to which fruits and branches of laurel and myrtle will be added. The tradition of the rubrics of στεφανωτικὰ ἄνθη, testified by Athenaeus in the 15th book of the Deipno sophistae, allows us to test both the rate of conventionality of the entire ecphrasis, and the variations made by Vergil to the lists of flowers and herbs, as well as Greek poetry as well as genr…