Search results for "BATES"

La ricostruzione dell'abside in alcuni esempi della seconda metà del XVI secolo a Palermo

2015

Il contributo ha l’obiettivo di studiare alcuni casi di ricostruzione dell’abside eseguiti in edifici chiesastici palermitani nella seconda metà del XVI secolo. Si tratta delle chiese di San Sebastiano, San Francesco d’Assisi e San Martino delle Scale (all’interno dell’omonima abbazia), in cui, nella seconda metà del Cinquecento, per motivi liturgici, l’abside originaria viene “trasformata”, in un’abside “piatta”, al fine di potervi inserire il Coro ligneo. Il nuovo posizionamento del Coro, in conseguenza della Riforma tridentina - problematica centrale nell’Europa di età moderna – suscita, anche in questi casi palermitani, dibattiti e controversie. Il cambiamento della forma dell’abside de…

"Par un ennemi qu'on sait digne de soi": la lunga traccia delle coppie antinomiche

2021

The contribution deals with antinomic couples, actual rivalries, symbolic confrontations; it is part of a discussion among scholars about the subject, in a column edited by the author and Niccolò Scaffai

L’EDUCAZIONE ECOLOGICA E LO SVILUPPO SOSTENIBILE. Dalla cultura che separa alla cultura che connette

2004

Mimicry between unequally defended prey can be parasitic: evidence for quasi-Batesian mimicry

2010

The nature of signal mimicry between defended prey (known as Mullerian mimicry) is controversial. Some authors assert that it is always mutualistic and beneficial, whilst others speculate that less well defended prey may be parasitic and degrade the protection of their better defended co-mimics (quasi-Batesian mimicry). Using great tits (Parus major) as predators of artificial prey, we show that mimicry between unequally defended co-mimics is not mutualistic, and can be parasitic and quasi-Batesian. We presented a fixed abundance of a highly defended model and a moderately defended dimorphic (mimic and distinct non-mimetic) species, and varied the relative frequency of the two forms of the …

THE EFFECT OF ALTERNATIVE PREY ON THE DYNAMICS OF IMPERFECT BATESIAN AND MÜLLERIAN MIMICRIES

2004

Both Batesian and Müllerian mimicries are considered classical evidence of natural selection where predation pressure has, at times, created a striking similarity between unrelated prey species. Batesian mimicry, in which palatable mimics resemble unpalatable aposematic species, is parasitic and only beneficial to the mimics. By contrast, in classical Müllerian mimicry the cost of predators' avoidance learning is shared between similar unpalatable co-mimics, and therefore mimicry benefits all parties. Recent studies using mathematical modeling have questioned the dynamics of Müllerian mimicry, suggesting that fitness benefits should be calculated in a way similar to Batesian mimicry; that i…

Prey community structure affects how predators select for Müllerian mimicry

2012

Müllerian mimicry describes the close resemblance between aposematic prey species; it is thought to be beneficial because sharing a warning signal decreases the mortality caused by sampling by inexperienced predators learning to avoid the signal. It has been hypothesized that selection for mimicry is strongest in multi-species prey communities where predators are more prone to misidentify the prey than in simple communities. In this study, wild great tits ( Parus major ) foraged from either simple (few prey appearances) or complex (several prey appearances) artificial prey communities where a specific model prey was always present. Owing to slower learning, the model did suffer higher mort…

Contrasting age-specific recruitment and survival at different spatial scales: A case study with the European storm petrel

2009

Evolutionary studies on optimal decisions or conservation guidelines are often derived by generalising patterns from a single population, while inter-population variability in life-history traits is seldom considered. We investigated here how survival and recruitment probabilities changed with age at different geographical scales using the encounter histories of 5523 European storm petrels from three Mediterranean colonies, and also how our estimates of these parameters might be expected to affect population growth rates using population matrix models. We recorded similar patterns among colonies, but also important biological differences. Local survival, recruitment and breeding success inc…

Convergent evolution of aposematic coloration in Neotropical poison frogs: a molecular phylogenetic perspective

2003

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:17:10Z No. of bitstreams: 1 WOS000186417800006.pdf: 196897 bytes, checksum: cbe901a47807d22aec173ee8cc011a64 (MD5) Made available in DSpace on 2014-02-26T17:17:10Z (GMT). No. of bitstreams: 1 WOS000186417800006.pdf: 196897 bytes, checksum: cbe901a47807d22aec173ee8cc011a64 (MD5) Previous issue date: 2003-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:59:12Z No. of bitstreams: 1 WOS000186417800006.pdf: 196897 bytes, checksum: cbe901a47807d22aec173ee8cc011a64 (MD5) Made available in DSpace on 2014-05-20T13:59:12Z (GMT). No. of bitstreams: 1 WOS000186417800006.pdf: 196…

APELACIÓN Y ATENUACIÓN: COMPARACIÓN INTERGENÉRICA ENTRE JUICIOS ORALES Y DEBATES PARLAMENTARIOS ESPAÑOLES

2017

espanolEl objetivo de este trabajo es estudiar los mecanismos de apelacion que desarrollan una funcion atenuante en contextos formales. Mas concretamente, nos proponemos centrar nuestro estudio en las formas de tratamiento nominales (como senoria) y en las formulas apelativas convencionalizadas (como mira). Para ello, esta investigacion se basa en dos corpus de dos generos pertenecientes al registro oral formal: el debate parlamentario y el juicio oral. Tras analizar las muestras tomando como referencia la funcion (preventiva o reparadora) del atenuante, la fuerza ilocutiva, la posicion y los roles de los participantes, se ha comprobado que incluso en contextos formales, estos mecanismos pu…

Los debates sociocientíficos: Un recurso para potenciar la competencia argumentativa en las clases de Física y Química

2013

En un centro público de educación secundaria de la ciudad de Valencia se realizaron debates socio-científicos en las clases de Física y Química durante los últimos cuatro cursos académicos en los niveles de 3º y 4º ESO y 1º de Bachillerato con la intención de mejorar la competencia argumentativa de los alumnos. Se observaron resultados positivos a lo largo del tiempo probablemente como consecuencia de las actividades realizadas. Se constata que estas mejoras son más fáciles de conseguir en el discurso escrito que en los debates orales. Los debates sociocientíficos son valorados muy positivamente por los alumnos en general y en algunos casos consiguen un cambio de actitud de alumnos pasivos …