42 documents found, page 1 of 5
Competition for food affects the strength of reproductive interference and its ...
Cruz, Miguel A.; Godoy, Oscar; De mendonça fragata almeida, Inês; Sousa, Vitor C; Magalhães, Sara; Zélé, FloreCompetition for food and reproductive interference (negative interspecific sexual interactions) have been identified as major drivers of species exclusion. Still, how these biotic interactions jointly determine competitive dominance remains largely unknown. We tackle this by coupling population models and laboratory experiments with two sibling species of spider mites. Using experiments specifically designed to...
Performance, nutrient digestibility and physiological resilience of juvenile gi...
Mendes, Rodrigo; Teodósio, Rita; Dias, Jorge; Fachadas Gato Coelho Gonçalves, Ana Teresa; Galileu Speranza, Lais; Magalhães, Sara; Aires, TiagoAquafeeds formulated with organic or circular economy-derived ingredients aim to enhance sustainability and consumer acceptance. This study evaluated the global warming potential (GWP) and digestibility of such feeds, and assessed their effects on performance, feed utilisation and physiological resilience, defined as the ability to maintain tissue function and integrity under different feeding conditions of juv...
Ongoing outbreak of hepatitis A associated with sexual transmission among men w...
Rosendal, Ebba; von Schreeb, Sebastian; Gomes, Alexandre; Lino, Sara; Grau-Pujol, Berta; Magalhães, Sara; Ricoca Peixoto, Vasco; Roque, CarlaAn outbreak of hepatitis A is ongoing in Portugal, with 71 confirmed cases from 7 October 2023 to 24 April 2024. Most cases are male, aged 18-44 years, with many identifying as men who have sex with men (MSM) and reported as suspected sexual transmission. Phylogenetic analysis identified the subgenotype IA, VRD 521-2016 strain, last observed in an MSM-associated multi-country outbreak in 2016 to 2018. We wish t...
Coinfection accelerates transmission to new hosts despite no effects on virulen...
Godinho, Diogo; Rodrigues, Leonor R; Lefèvre, Sophie; Magalhães, Sara; Duncan, Alison B.One of the fundamental aims of ecological, epidemiological and evolutionary studies of host–parasite interactions is to unravel which factors affect parasite virulence. Theory predicts that virulence and transmission are correlated by a trade-off, as too much virulence is expected to hamper transmission owing to excessive host damage. Coinfections may affect each of these traits and/or their correlation. Here, ...
Spider mites collectively avoid plants with cadmium irrespective of their frequ...
Godinho, Diogo P.; De mendonça fragata almeida, Inês; de la Masseliere, Maud Charlery; Magalhães, SaraAccumulation of heavy metals by plants can serve as a defence against herbivory. Herbivores, in turn, may avoid feeding on contaminated tissues. Such avoidance, however, may hinge upon the specific conditions faced by herbivores. Here, we tested whether the spider mite Tetranychus urticae avoids tomato plants contaminated with cadmium in presence of conspecifics or heterospecifics and depending on the frequency...
Limits to the adaptation of herbivorous spider mites to metal accumulation in h...
Godinho, Diogo P.; De mendonça fragata almeida, Inês; Majer, Agnieszka; Rodrigues, Leonor R; Magalhães, SaraMetal accumulation is used by some plants as a defence against herbivores. Yet, herbivores may adapt to these defences, becoming less susceptible. Moreover, ecosystems often contain plants that do and do not accumulate metals, but whether such heterogeneity affects herbivore adaptation remains understudied. Here, we performed experimental evolution to test whether the spider mite Tetranychus evansi adapts to pl...
Wolbachia strengthens the match between premating and early postmating isolatio...
Cruz, Miguel; Magalhães, Sara; Bakırdöven, Murat; Zélé, FloreEndosymbiotic reproductive manipulators are widely studied as sources of post-zygotic isolation in arthropods, but their effect on pre-zygotic isolation between genetically differentiated populations has garnered less attention. We tested this using two partially isolated populations of the red and green colour forms of Tetranychus urticae, either uninfected or infected with different Wolbachia strains, one ind...
Fake news? The impact of information mismatch on mating behaviour
Rodrigues, Leonor R.; Magalhães, SaraMultiple cues are often used for mate choice in complex environments, potentially entailing mismatches in the information conveyed by different sources. We address the consequences of this information mismatch for receivers using the spider mite Tetranychus urticae, in which virgin females are highly valuable mates compared to mated females, given first male sperm precedence. Accordingly, males are known to pre...
Interspecific interactions among parasites in multiple infections
Duncan, Alison B.; Godoy, Oscar; Michalakis, Yannis; Zélé, Flore; Magalhães, SaraIndividual hosts and populations frequently harbour multiple parasite species simultaneously. Despite their commonness, the consequences of interspecific interactions among parasites for determining infection outcomes are still poorly understood. We review and propose several expectations for multiple infections involving different species. We highlight that interspecific interactions affect the outcome of comp...
A Sex‐Specific Trade‐Off Between Pesticide Resistance and Tolerance to Heat‐Ind...
Costa, Sofia G.; Magalhães, Sara; Santos, Inês; Zélé, Flore; Rodrigues, Leonor RCurrent pest management relies extensively on pesticide application worldwide, despite the frequent rise of pesticide resistance in crop pests. This is particularly worrisome because resistance is often not costly enough to be lost in populations after pesticide application, resulting in increased dependency on pesticide application. As climate warming increases, effort should be put into understanding how heat...