Integrating Behavior in Life-History Theory: Allocation versus Acquisition?

Central theories explaining the maintenance of individual differences in behavior build on the assumption that behavior mediates life-history trade-offs between current and future reproduction. However, current empirical evidence does not robustly support this assumption. This mismatch might be because current theory is not clear about the role of behavior in individual allocation versus acquisition of resources, hindering empirical testing. The relative importance of allocation compared to acquisition is a key feature of classic life-history theory, but appears to have been lost in translation in recent developments of life-history theory involving behavior. We argue that determining the relative balance between variation in resource allocation and acquisition, and the role of behavior in this process, will help to build more robust and precise predictions.Peer reviewe

Stronger net selection on males across animals

Sexual selection is considered the major driver for the evolution of sex differences. However, the eco-evolutionary dynamics of sexual selection and their role for a population’s adaptive potential to respond to environmental change have only recently been explored. Theory predicts that sexual selection promotes adaptation at a low demographic cost only if sexual selection is aligned with natural selection and if net selection is stronger on males compared to females. We used a comparative approach to show that net selection is indeed stronger in males and provide preliminary support that this sex bias is associated with sexual selection. Given that both sexes share the vast majority of their genes, our findings corroborate the notion that the genome is often confronted with a more stressful environment when expressed in males. Collectively, our study supports one of the long-standing key assumptions required for sexual selection to bolster adaptation, and sexual selection may therefore enable some species to track environmental change more efficiently

Recomendações e Consensos do Grupo de Estudos de Esclerose Múltipla e da Sociedade Portuguesa de Neurorradiologia sobre Ressonância Magnética na Esclerose Múltipla na Prática Clínica: Parte 1

Magnetic resonance imaging is established as a recognizable tool in the diagnosis and monitoring of multiple sclerosis patients. In the present, among multiple sclerosis centers, there are different magnetic resonance imaging sequences and protocols used to study multiple sclerosis that may hamper the optimal use of magnetic resonance imaging in multiple sclerosis. In this context, the Group of Studies of Multiple Sclerosis and the Portuguese Society of Neuroradiology, after a joint discussion, appointed a committee of experts to create recommendations adapted to the national reality on the use of magnetic resonance imaging in multiple sclerosis. The purpose of this document is to publish the first Portuguese consensus recommendations on the use of magnetic resonance imaging in multiple sclerosis in clinical practice.This work had a investigational grant from Roche Farmaceutica Quimica LDA: EPAM129844-G.info:eu-repo/semantics/publishedVersio

Recommendations about multiple sclerosis management during pregnancy, partum and post-partum : consensus position of the Portuguese Multiple Sclerosis Study Group

Copyright © Ordem dos Médicos 2020Multiple sclerosis typically affects young women of reproductive age. Therefore, all healthcare professionals involved in the follow-up of multiple sclerosis patients must be prepared to discuss pregnancy and breastfeeding issues and provide the best possible counselling. However, there are still many doubts and heterogeneous clinical approaches partly due to the lack of consensus and guidelines. Concerning the handling of disease modifying therapies during pregnancy and postpartum, existing uncertainties have been complicated by the increase in the number of treatments available in recent years. This article aims to present the state-of-the-art and provide guidance based on the best level of available evidence and expert opinion regarding the management of multiple sclerosis patients at different stages: pregnancy planning, pregnancy, partum, and the postpartum period.Este trabalho teve o financiamento de uma bolsa de investigação da Roche Farmacêutica Química LDA: EPAM129844-G.info:eu-repo/semantics/publishedVersio

Recommendations about multiple sclerosis management during pregnancy, partum and post-partum: consensus position of The Portuguese Multiple Sclerosis Study Group and The Portuguese Society of Obstetrics and MaternalFetal Medicine

A esclerose múltipla afeta tipicamente mulheres jovens em idade reprodutiva. Desta forma, todo os profissionais de saúde envolvidos no seguimento destes doentes deverão estar preparados para abordar as questões relacionadas com a gravidez e amamentação e fornecer o melhor aconselhamento possível. No entanto, existem ainda muitas dúvidas e abordagens clínicas heterogéneas em parte devido à ausência de consensos e normas orientadoras. No que concerne ao manuseamento das terapêuticas modificadoras de doença durante os períodos de gravidez e pós-parto, as incertezas têm sido agravadas devido ao aumento do número de fármacos disponíveis nos últimos anos. Este artigo visa apresentar a informação mais atual e fornecer orientações baseadas no melhor nível de evidência disponível e na opinião de peritos relativamente ao seguimento das doentes com esclerose múltipla em diferentes etapas: planificação da gravidez, gravidez, parto e período pós-parto.Multiple sclerosis typically affects young women of reproductive age. Therefore, all healthcare providers involved in the follow-up of multiple sclerosis patients must be prepared to discuss pregnancy and breastfeeding issues, and provide the best possible counselling. However, there are still many doubts and heterogeneous clinical approaches partly due to the lack of consensus and guidelines. Concerning the handling of disease modifying therapies during pregnancy and the postpartum period, uncertainties have been complicated by the increase in recent years of the number of available treatments. This article aims to present the state-of-the-art and provide guidance based on the best level of available evidence and expert opinion regarding the management of multiple sclerosis patients at different stages: pregnancy planning, pregnancy, partum, and the postpartum period

Temporal correlations among demographic parameters are ubiquitous but highly variable across species

Temporal correlations among demographic parameters can strongly influence population dynamics. Our empirical knowledge, however, is very limited regarding the direction and the magnitude of these correlations and how they vary among demographic parameters and species’ life histories. Here, we use long-term demographic data from 15 bird and mammal species with contrasting pace of life to quantify correlation patterns among five key demographic parameters: juvenile and adult survival, reproductive probability, reproductive success and productivity. Correlations among demographic parameters were ubiquitous, more frequently positive than negative, but strongly differed across species. Correlations did not markedly change along the slow-fast continuum of life histories, suggesting that they were more strongly driven by ecological than evolutionary factors. As positive temporal demographic correlations decrease the mean of the long-run population growth rate, the common practice of ignoring temporal correlations in population models could lead to the underestimation of extinction risks in most species

data -driven identification of fixed expressions and their modification

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