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Escala de Percepción de Promoción del Bienestar para Entrenadores (EPPBE): Análisis inicial de sus propiedades psicométricas y validez. (Perception o…
2011
Este estudio analizo las propiedades psicometricas de la Escala de Percepcion de Promocion del Bienestar para Entrenadores (EPPBE), compuesta por 6 dimensiones: Autocontrol, castigo, apoyo social, apoyo a la autonomia, apoyo a la competencia y apoyo a la afiliacion. Se administro la escala a 506 entrenadores y se realizo un analisis factorial confirmatorio. La validez nomologica se analizo a traves de las relaciones de las variables con la satisfaccion de necesidades basicas y la motivacion autodeterminada. El modelo mostro un ajuste adecuado a los datos. El castigo percibido no correlaciono con el resto de variables de la escala, que si mostraron correlaciones positivas entre ellas, hasta …
Dynaaminen populaatiomalli Suomen valkohäntäkauriille : sovelluskohteena Pöytyän riistanhoitoyhdistys
2012
Valkohäntäkauris (Odocoileus virginianus) on Yhdysvalloista Suomeen tuotu vieraslaji. Kauriiden ja autojen yhteentörmäykset ovat lisääntyneet kauriiden määrän kasvaessa. Kolareiden ja muiden kauriista aiheutuvien haittojen vähentämiseksi kannan kokoa säädellään metsästämällä. Vuosittaisten metsästyslupien määrä päätetään kannan koon arvioiden perusteella. Tässä työssä esitellään uusi tapa arvioida Suomen valkohäntäkauriiden kantaa. Vuosittain metsästettyjen valkohäntäkauriiden lukumäärät tunnetaan metsästäjien ilmoitusten perusteella. Lisäksi metsästäjät antavat oman arvionsa metsästysalueensa metsästyksen jälkeisestä kauriiden kannasta. Tässä tutkielmassa kuvataan näitä tietoja hyödyntävä …
Main protein component of high density lipoprotein, apolipoprotein A1, modulates leukocyte cell respiration
2015
HDL:n (high density lipoprotein) pääproteiinikomponentin, apolipoproteiini A1:n (ApoA1), on todettu lisäävän glykolyysia ja oksidatiivista fosforylaatiota hiiren luurankolihassoluissa. ApoA1:llä oletetaan myös olevan merkittävä rooli lihaksen normaalissa aineenvaihdunnassa ja siihen liittyvissä sairauksissa. ApoA1 vaikuttaa leukosyyttien aktivaatioon ja jakautumiseen säätelemällä solun sisäistä kolesterolitasoa. Nämä muutokset vaikuttavat myös solun aineenvaihduntaan. ApoA1:n suoranaista vaikutusta leukosyyttien soluhengitykseen ei kuitenkaan ole aiemmin tutkittu. Aiemmin on esitetty, että leukosyyttejä voitaisiin käyttää biomarkkerina kuvaamaan muutoksia mitokondrioiden toiminnassa aineenv…
A framework for Population Protocols in VANETs
2023
Multiple modalities in insect warning displays have additive effects against wild avian predators
2019
Allocation to different components of defence has been suggested as an explanation for the existence of multiple aposematic morphs in a single population. We tested whether there are trade-offs between warning colouration and chemical defence or whether these have an additive effect when combined, using blue tits (Cyanistes caeruleus) as predators and the polymorphic wood tiger moth (Arctia plantaginis) as prey. We used artificial edible models (with and without the moths’ defensive fluids) with paper wings whose colour and pattern properties matched those of real moths. When the models were presented sans defensive fluids or when the fluids were presented without colour cues, we detected n…
Transparency reduces predator detection in mimetic clearwing butterflies
2019
International audience; Predation is an important selective pressure and some prey have evolved conspicuous warning signals that advertise unpalatability (i.e. aposematism) as an antipredator defence. Conspicuous colour patterns have been shown effective as warning signals, by promoting predator learning and memory. Unexpectedly, some butterfly species from the unpalatable tribe Ithomiini possess transparent wings, a feature rare on land but common in water, known to reduce predator detection.We tested if transparency of butterfly wings was associated with decreased detectability by predators, by comparing four butterfly species exhibiting different degrees of transparency, ranging from ful…
The Effect of Predator Population Dynamics on Batesian Mimicry Complexes.
2022
Understanding Batesian mimicry is a classic problem in evolutionary biology. In Batesian mimicry, a defended species (the model) is mimicked by an undefended species (the mimic). Prior theories have emphasized the role of predator behavior and learning as well as evolution in model-mimic complexes but have not examined the role of population dynamics in potentially governing the relative abundances and even persistence of model-mimic systems. Here, we examined the effect of the population dynamics of predators and alternative prey on the prevalence of warning-signaling prey composed of models and mimics. Using optimal foraging theory and signal detection theory, we found that the inclusion …
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…
Diversity in warning coloration: selective paradox or the norm?
2019
Aposematic theory has historically predicted that predators should select for warning signals to converge on a single form, as a result of frequency-dependent learning. However, widespread variation in warning signals is observed across closely related species, populations and, most problematically for evolutionary biologists, among individuals in the same population. Recent research has yielded an increased awareness of this diversity, challenging the paradigm of signal monomorphy in aposematic animals. Here we provide a comprehensive synthesis of these disparate lines of investigation, identifying within them three broad classes of explanation for variation in aposematic warning signals: …