Search results for "DRIFT"
showing 10 items of 321 documents
The founder principle, founder selection, and evolutionary divergence and convergence in natural populations of Philaenus
2009
Parts of the archipelago of the Baltic Sea are rising above the water level at a steady, slow rate. Plant species appear on the emerging islands in a definite order, and an early stage and a late stage can be distinguished in the development of meadows on the islands. In 1969–1973 four populations of Philaenus spumarius living in meadows at the early stage had widely different frequencies of the alleles determining colour polymorphism. In the same years three Philaenus populations living on islands with meadows at the late stage had closely similar allele frequencies. The differences between the Philaenus populations in the early stage meadows are ascribed partly to the founder principle an…
Mitochondrial DNA effects on fitness in Drosophila subobscura
2011
We tested different fitness components on a series of conspecific mtDNA haplotypes, detected by RFLPs in Drosophila subobscura. Additionally, haplotype VIII, endemic to the Canary Islands, was tested upon its own native nuclear DNA background and upon that of the rest of mtDNAs tested herein. We found that both nuclear and mitochondrial DNA can have a significant effect upon their hosts' fitness, and that negative selection is one of the mechanisms that can intervene in this species' mtDNA haplotype pattern. We discuss the importance of this mechanism in relation to genetic drift, in the form of periodic population bottlenecks, and how the latter can enhance the former. We also detected a s…
The benefits of interpopulation hybridization diminish with increasing divergence of small populations.
2012
Interpopulation hybridization can increase the viability of small populations suffering from inbreeding and genetic drift, but it can also result in outbreeding depression. The outcome of hybridization can depend on various factors, including the level of genetic divergence between the populations, and the number of source populations. Furthermore, the effects of hybridization can change between generations following the hybridization. We studied the effects of population divergence (low vs. high level of divergence) and the number of source populations (two vs. four source populations) on the viability of hybrid populations using experimental Drosophila littoralis populations. Population v…
To join or not to join? Insights from coopetitive RD&I projects
2022
Multipartner research, development and innovation (RD&I) projects are increasingly used to achieve complex innovation goals and keep pace with today's technological imperatives. The involvement of both competing and noncompeting partners increases the complexity of the relationships and poses a challenge to the outcomes of such projects. Therefore, the right choice of partners is particularly important in this context. Although previous research has mainly examined how focal firms deliberately select collaborative partners, this study demonstrates how non-focal firms evaluate invitations to participate in RD&I projects with multiple partners and direct competitors. Going beyond …
Similar but Different? The influence of job satisfaction, organizational commitment and person-job fit on individual performance in the continuum bet…
2022
Permanent organizations and temporary organizations, such as projects, represent two poles of a continuum of organizational temporariness. The literature has shown that organizational temporariness can influence organizational outcomes and employee behavior. Using a sample of 341 members of temporary organizations, we investigate job satisfaction and organizational commitment in a permanent organization and person-job fit in a temporary organization as antecedents of employee performance. We further examine how the degree of organizational temporariness moderates these relationships. The findings show that job satisfaction and organizational commitment negatively influence employee performa…
Behavioral reasoning perspectives to brand love toward natural products: Moderating role of environmental concern and household size
2021
Abstract Consumers do not easily trust brands’ claims of naturalness, making it essential to understand the drivers of loyalty and the underlying brand love for such products. Responding to this need, the present study developed a conceptual model based on the Behavioral Reasoning Theory (BRT) to examine the antecedents of brand love. The model was tested using data collected through a cross-sectional survey. The findings suggest that health consciousness is positively associated with reasons for consuming natural products and attitude, which, in turn, are also positively associated with each other. At the same time, reasons for consuming natural products and attitude are positively associa…
Why retail investors traded equity during the pandemic? An application of artificial neural networks to examine behavioral biases
2021
Behavioral biases are known to influence the investment decisions of retail investors. Indeed, extant research has revealed interesting findings in this regard. However, the literature on the impact of these biases on millennials' trading activity, particularly during a health crisis like the COVID-19 pandemic, as well as the equity recommendation intentions of such investors, is limited. The present study addressed these gaps by investigating the influence of eight behavioral biases: overconfidence and self-attribution, over-optimism, hindsight, representativeness, anchoring, loss aversion, mental accounting, and herding on the trading activity and recommendation intentions of millennials …
Purchasing natural personal care products in the era of fake news? The moderation effect of brand trust
2021
Natural personal care products are gaining popularity due to their benefits in terms of health and well-being. However, consumers are wary of these products and are guided by the fake news circulating about them. Since natural product consumption offers several personal and environmental benefits, it would be worthwhile to understand consumers’ tendency to let fake news influence their consumption decisions. Accordingly, the current study examined the association of fake news and purchasing behaviour towards natural personal care products, utilising Stimulus-Organism-Behaviour-Consequence (SOBC) as the theoretical framework. The study proposed openness to change as the stimulus, perceived b…
The balancing act: How do moral norms and anticipated pride drive food waste/reduction behaviour?
2022
Food waste is a serious problem that impacts the environment and sustainability by increasing greenhouse gas emissions from landfills. Food waste also represents a social challenge because it raises serious concerns about food security. While acknowledging that households waste a great deal of food because they lack a proper routine for reusing leftovers and purchase more food than required, few studies have extensively examined the drivers of leftover reuse and over-ordering. We address this gap using the stimulus-organism-response paradigm. Moral norms and anticipated pride are conceptualised as stimuli that impact the organismic state of intentions against food waste and response in the …
Barriers and paradoxical recommendation behaviour in online to offline (O2O) services. A convergent mixed-method study
2021
Mobile apps offering online to offline (O2O) services act as aggregators providing interface for delivery of required products and services at a preferred location. Despite offering multiple affordances, many O2O services have not diffused as anticipated, indicating the existence of consumer resistance towards them. One such example is that of food delivery apps (FDAs), which are experiencing resistance at both the pre-adoption and post-adoption stage. However, there are scarce empirical findings explicating the pre-and post-adoption barriers perceived to be associated with FDAs. The present study addresses this gap by utilising the Innovation Resistance Theory (IRT) and a convergent mixed-…