Publications by authors named "Toky M Randriamoria"
Small terrestrial mammals are major hosts of infectious agents responsible for zoonotic diseases. Astroviruses (AstVs)-the cause of non-bacterial gastroenteritis mainly affecting young children-have been detected in a wide array of mammalian and avian host species. However, understanding the factors that influence AstV infection within and across hosts is limited.
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- The study explores how public health authorities can effectively implement targeted surveillance for disease control when resources are limited, using social network analysis.
- By evaluating sociodemographic factors, such as age and marital status, as proxies for degree centrality, the researchers tested their effectiveness against known network data in low-resource settings.
- Results showed that using these sociodemographic proxies can significantly reduce infection rates while decreasing the number of tests needed, indicating that they are a viable alternative when direct social network data is not accessible.
De par sa haute capacité d'adaptation et la plasticité de son alimentation, reflétée par une variation morphologique des individus, s'est dispersé et a occupé un large éventail d'habitats à Madagascar après son introduction qui date du X siècle environ. Cette étude s'intéresse à la variation morphologique de cette espèce superposée à différents modes d'utilisation du paysage. Nous avons analysé des données morphométriques crânio-dentaires recueillies à partir de 333 spécimens capturés dans le bassin-versant de la rivière Manantenina sur la partie orientale du Massif de Marojejy.
View Article and Find Full Text PDFWith the aim of providing additional information on the reproductive ecology of G. Grandidier, 1899, the present study examines the breeding season of this species and other related aspects across a range of native forest areas and human modified habitats. This poorly known species occurs in the lowland moist evergreen forest of the Marojejy National Park and the surrounding anthropic zones.
View Article and Find Full Text PDFHerein we provide a dietary analysis using stomach contents of (G. Grandidier, 1899), a poorly known species of shrew tenrec, in the dense lowland moist evergreen forest of the Marojejy National Park and human modified habitats in the peripheral zones. We specifically examine the arthropods consumed by this species and variation related to season, habitat type, sex and age of individuals.
View Article and Find Full Text PDFBackground: Rodents of the genus Rattus are among the most pervasive and successful invasive species, causing major vicissitudes in native ecological communities. A broad and flexible generalist diet has been suggested as key to the invasion success of Rattus spp. Here, we use an indirect approach to better understand foraging niche width, plasticity, and overlap within and between introduced Rattus spp.
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- Lizards and snakes have color variations that help them adapt for thermoregulation, camouflage, avoiding predators, sexual selection, and speciation.
- The panther chameleon, Furcifer pardalis, shows significant variations in male color and strong genetic differences within its populations across Madagascar, indicating limited gene flow.
- The study uses advanced DNA analysis and a machine learning approach to create a visual classification key to help manage chameleon populations and prevent overharvesting.