Search results for " adaptation"
showing 4 items of 504 documents
Heterozygote advantage and pleiotropy contribute to intraspecific color trait variability
2022
The persistence of intrapopulation phenotypic variation typically requires some form of balancing selection because drift and directional selection eventually erode genetic variation. Heterozygote advantage remains a classic explanation for the maintenance of genetic variation in the face of selection. However, examples of heterozygote advantage, other than those associated with disease resistance, are rather uncommon. Across most of its distribution, males of the aposematic moth Arctia plantaginis have two hindwing phenotypes determined by a heritable one locus-two allele polymorphism (genotypes: WW/Wy = white morph, yy = yellow morph). Using genotyped moths, we show that the presence of o…
The impact of life stage and pigment source on the evolution of novel warning signal traits
2021
Our understanding of how novel warning color traits evolve in natural populations is largely based on studies of reproductive stages and organisms with endogenously produced pigmentation. In these systems, genetic drift is often required for novel alleles to overcome strong purifying selection stemming from frequency-dependent predation and positive assortative mating. Here, we integrate data from field surveys, predation experiments, population genomics, and phenotypic correlations to explain the origin and maintenance of geographic variation in a diet-based larval pigmentation trait in the redheaded pine sawfly (Neodiprion lecontei), a pine-feeding hymenopteran. Although our experiments c…
Linguistic, Contextual, and Experiential Equivalence Issues in the Adaptation of a Performance-Based Assessment of Generic Skills in Higher Education
2022
This qualitative study investigated the various linguistic, contextual, and experiential equivalence issues embedded in a performance-based instrument aimed at assessing generic skills in higher education. A rigorous translation and adaptation process (American English to Finnish) was conducted on one instrument, namely Collegiate Learning Assessment (CLA+) International. The data were obtained from cognitive laboratories (n = 13), with think-alouds and follow-up interviews conducted among Finnish undergraduate students. Content logs were created, and the data were analyzed thematically. The findings revealed that linguistic and contextual equivalence issues were more prominent than experie…
L’amica geniale in Inghilterra: il caso dell’adattamento radio di Timberlake Wertenbaker
2019
This paper takes into consideration Timberlake Wertenbaker's adaptation of Ferrante's My Brilliant Friend (2016) for the radio. In particular, the focus of the paper is on the first of the four radioplays and on the dramatic strategies used and adaptation choices made by Wertenbaker. We shall focus on the use of two main adult voices (Lena and Lila), the use of the voice over, and the representation of time. The chapter also considers the image of "neapolitanity" offered in the radioplay, the reception with the British audience with respect to the meridionist idea of Southern Italy as poor and violent. I aim to show how, with some exceptions, Wertenbaker somehow manages to push beyond the c…