Topic
Mantella
About: Mantella is a research topic. Over the lifetime, 92 publications have been published within this topic receiving 2575 citations.
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01 Jan 2001
1 citations
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TL;DR: The total synthesis of pyrrolizidines 223H, 239K, 265H', and 267H' has been achieved starting from 1,5-hexadiene via a common synthetic intermediate as mentioned in this paper.
Abstract: The total synthesis of pyrrolizidines 223H', 239K', 265H', and 267H' has been achieved starting from 1,5-hexadiene via a common synthetic intermediate 5. The affinity of 1-4 for nicotinic acetylcholine receptor was evaluated.
01 Jan 2006
TL;DR: Estimation of inter- and intrapopulation mitochondrial genetic variation of four populations of Mantella bernhardi suggests the existence of important barriers to gene flow, pre-dating human colonization of Madagascar at about 2000 years ago, in distinct contrast to other Mantella species that show a high degree of haplotype sharing throughout their range.
Abstract: Mantella bernhardi is an endemic species of Malagasy poison frog threatened by loss and fragmentation of its natural habitat and collection for the pet trade. It is classified as threatened according to the International Union for Conservation of Nature and Natural Resources (IUCN) categories and included in Appendix II of the Convention on the International Trade of Endangered Species (CITES). A recent survey has increased the known distributional range of the species from one to eight populations across southeastern Madagascar, but little is known about its biology and genetic diversity. Here we estimate inter- and intrapopulation mitochondrial genetic variation of four populations. Populations from the northern and southern parts of the distributional range showed a high degree of divergence (maximum of 11.35% in cytochrome b ) and were recovered as reciprocally monophyletic groups. Nine haplotypes were detected in the northern and 12 in the southern populations. The population from Ranomafana National Park showed the lowest number of haplotypes and nucleotide diversity, and shared its most common haplotype with the second northern population from Tolongoina. All the other detected haplotypes were unique to each of the four populations. This suggests the existence of important barriers to gene flow, pre-dating human colonization of Madagascar at about 2000 years ago, in distinct contrast to other Mantella species that show a high degree of haplotype sharing throughout their range. The continued habitat fragmentation within the distribution range of M. bernhardi prevents any connection between its populations. Our data indicate the existence of at least two different management units for conservation in this species, corresponding to the North and South of its distribution range, and highlight the existence of strong regional endemism in southeastern Madagascar.
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21 Oct 2019TL;DR: This study reports the complete mitochondrial genome of Mantella baroni, the second mitogenome sequenced for the Mantellidae family, and hypothesizes that other Mantella species likely have large genomes, being not clear how the genome size and organization of mitochondria evolved in Malagasy frogs.
Abstract: Within the Malagasy endemic family of Mantellidae, the only completely sequenced mitochondrial genome (mitogenome) is that of Mantella madagascariensis. Yet, this genome has proven to be th...
30 May 2016
TL;DR: These frogs are collected for the international pet trade for their small size and the iridescent color of their skin and the aposematic colorations result from particular toxic secretions.
Abstract: Nowadays, there are 16 named species of Mantella frogs. However, some other species are waiting for the determination of their status. These frogs are currently endangered by the lost of their habitats and the poaching. These frogs are collected for the international pet trade for their small size (less than 5 cm) and the iridescent color of their skin. These aposematic colorations result from particular toxic secretions. Their skin poisons mainly contain mixtures of alkaloid molecules. These mixtures have been reported to vary according to geographical location, season, and diet of the frog [1-2].