Search results for " Selection"

Sex-biased dispersal and kin aggregation on leks in the black grouse (Tetrao tetrix)

2007

Scientific writing for impact factor journals

2013

EASARCICAPLivre dispo. dans :hal-00832739, version 1; Publish or Perish. This old adage illustrates the importance of scientific communication; essential to research, it also represents a strategic sector for each country’s competitiveness. An often-neglected topic, scientific communication is of vital importance, with new information technologies accelerating and profoundly changing how knowledge is disseminated. The necessity of optimally disseminating experts’ findings has also become crucial to researchers, institutes and universities alike, which has prompted the recent advent of Impact Factors for the evaluation and financing of research, the goal being for scientific knowledge to be …

Entextualization and resemiotization as resources for identification in social media

2014

Drawing on insights provided by linguistic anthropology, the study of multisemioticity and research in computer-mediated discourse (CMD), this chapter discusses how entextualization (Bauman & Briggs, 1990; Silverstein & Urban, 1996; Blommaert, 2005, pp. 46–8) and resemiotization (Iedema, 2003; Scollon & Scollon, 2004, pp. 101–3; Scollon, 2008) are key resources for identity work in social media. Three key arguments inspire and give direction to our discussion, each of them laying down touchstones for language scholars who wish to investigate identity in social media. First, for many individuals and social or cultural groups, social media are increasingly significant grassroots arenas for in…

On overall sampling plan for small area estimation

2017

The time and budget restrictions in survey sampling can impose limits on the area sample sizes. This may reduce the possibility to obtain area-specific and population parameters estimates with adequate precision. Market research companies and institutes for producing official statistics face frequently this problem. Various models and methods for small area estimation (SAE) have been developed to solve this problem. The sample allocation must support the selected model and method to ensure efficient estimation and must be implemented in the design phase of the survey. The proposed allocation is developed by incorporating auxiliary information, a model, and an estimation method. The estimate…

Tasks that suit the learning of L2 English vocabulary in the Finnish middle school : teachers' and students' perspectives

2013

Tiivistelmä – Abstract Tutkielman tarkoituksena oli selvittää yläkoulun oppilaiden ja opettajien mielipiteitä sanaston oppimiseen suunnatuista tehtävistä; millaiset tehtävät heidän mielestään sopivat sanaston oppimiseen yläkoulussa. Samalla selvitettiin sanaston oppimista koulun ulkopuolella sekä sanaston oppimiseen käytettyä aikaa. Oppilaiden ja opettajien mielipiteitä verrattiin toisiinsa. Tutkimus toteutettiin Tampereella vuonna 2010. Osallistujina olivat kolme englannin opettajaa ja heidän luokkansa, yksi kutakin luokka-astetta, yhteensä 52 oppilasta. Kaikki osallistujat vastasivat kyselyyn, johon oli ennalta valittu oppikirjoista tietyt tehtävät arvioitaviksi tietyin kriteerein. Lisäks…

Sexual selection on song and cuticular hydrocarbons in two distinct populations of Drosophila montana

2011

Sexual selection has the potential to contribute to population divergence and speciation. Most studies of sexual selection in Drosophila have concentrated on a single signaling modality, usually either courtship song or cuticular hydrocarbons (CHCs), which can act as contact pheromones. We have examined the relationship between both signal types and reproductive success using F1–3 offspring of wild- collected flies, raised in the lab. We used two populations of the Holarctic species Drosophila montana that represent different phylogeographic clades that have been separate for ca. 0.5 million years (MY), and differ to some extent in both traits. Here, we characterize the nature and identify …

SELVICOLTURA ALPINA E SELVICOLTURA APPENNINICA: ELEMENTI DI CONTATTO E DI DIFFERENZIAZIONE

2009

Riassunto Il rapporto tra boschi e popolazioni locali sulle Alpi come sugli Appennini, seppur in momenti storici differenti, è stato caratterizzato dalla distruzione e sfruttamento intensivo, protrattisi fino alla metà del secolo scorso, cui hanno fatto seguito la ricostituzione sia mediante rimboschimenti sia con il miglioramento dei boschi esistenti. Partendo dai presupposti sui quali si è imperniata l’attività forestale che ha caratterizzato, nel corso degli ultimi cinquant’anni, l’approccio selvicolturale nei due contesti e da una puntuale e documentata analisi, nel lavoro vengono evidenziati gli elementi di differenziazione tra la selvicoltura naturalistica applicata in ambiente alpino…

Kin selection in interactions between gametes: Gamete competition, gamete limitation, and sex allocation

2023

Kin selection on one hand, and gamete interactions in post-ejaculatory sexual selection on the other are two major research themes that have risen to prominence over the past half century and have simultaneously developed into central fields of research in evolutionary biology. There is a natural connection between the two: when gametes interact with each other, very commonly many of them originate from the same parent and are thus siblings. For example, sperm competition will almost always involve competition between sibling gametes even if the interacting parents are not related to each other. If parents are related to each other, the relatedness between gametes increases further. Here we…

Fluctuating asymmetry and sexual performance in the drumming wolf spider Hygrolycosa rubrofasciata

2003

Recently, there has been much interest in estimating fluctuating asymmetry (FA) of morphological traits as a short-cut measure of individual quality. FA deals with small differences around the symmetry value of zero. Thus, measurement error is often relatively large. However, repeated measurements. and large sample sizes allow reliable estimates of FA that can be corrected for errors. The purpose of this study was two-fold: at the biological level, we examined with a large sample size (N = 804) whether pedipalp FA could be used as a short-cut measure, of individual quality in the wolf spider Hygrolycosa rubrofasciata. This was done by estimating how strongly FA correlates with male sexual p…

Looking at social motivation to assess meat producing poultry adaptation to rearing conditions

2013

International audience