A5059871565- Amphibian and Reptile Biology
- Species Distribution and Climate Change
- Bat Biology and Ecology Studies
- Wildlife Ecology and Conservation
- Lepidoptera: Biology and Taxonomy
- Genomics and Phylogenetic Studies
- Animal Behavior and Reproduction
- Turtle Biology and Conservation
- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Spider Taxonomy and Behavior Studies
- Evolution and Paleontology Studies
- Fish Biology and Ecology Studies
- Animal Vocal Communication and Behavior
- Ethnobotanical and Medicinal Plants Studies
- Wildlife-Road Interactions and Conservation
- Fish biology, ecology, and behavior
- Plant and animal studies
- Agricultural Systems and Practices
- Paleontology and Evolutionary Biology
- Animal Nutrition and Physiology
- Genetic diversity and population structure
- Livestock Management and Performance Improvement
- Coccidia and coccidiosis research
- Livestock and Poultry Management
University of Delhi
2014-2023
Kerala Veterinary and Animal Sciences University
2019
Vrije Universiteit Brussel
2003-2007
Jawaharlal Nehru Tropical Botanic Garden and Research Institute
1999-2003
University of Calicut
1990
Assessing Biodiversity Declines Understanding human impact on biodiversity depends sound quantitative projection. Pereira et al. (p. 1496 , published online 26 October) review scenarios that have been developed for four main areas of concern: species extinctions, abundances and community structure, habitat loss degradation, shifts in the distribution biomes. are projected whole 21st century all scenarios, but with a wide range variation. Hoffmann 1503 draw results five decades' worth data...
The fossil record of modern amphibians (frogs, salamanders, and caecilians) provides no evidence for major extinction or radiation episodes throughout most the Mesozoic early Tertiary. However, long-term gradual diversification is difficult to reconcile with sensitivity present-day amphibian faunas rapid ecological changes incidence similar environmental perturbations in past that have been associated high turnover rates other land vertebrates. To provide a comprehensive overview history...
Abstract Systematic assessments of species extinction risk at regular intervals are necessary for informing conservation action 1,2 . Ongoing developments in taxonomy, threatening processes and research further underscore the need reassessment 3,4 Here we report findings second Global Amphibian Assessment, evaluating 8,011 International Union Conservation Nature Red List Threatened Species. We find that amphibians most threatened vertebrate class (40.7% globally threatened). The updated...
Recent studies have identified range expansion as a potential driver of speciation. Yet it remains poorly understood how, under identical extrinsic settings, differential tendencies for geographic movement taxa originate and subsequently affect diversification. We multiple traits that predict large distributional ranges in extant species toads (Bufonidae) used statistical methods to define phylogenetically reconstruct an optimal range-expansion phenotype. Our results indicate...
The Megophrys major species group (MMSG) is composed of typically medium to large sized frogs. Within the genus, it most geographically widespread clade ranging from western Himalayas southern Indochina. In this study, we examined in detail extent cryptic diversity within MMSG-Indian populations based on molecular data (up ten genes) using multigene concatenation and coalescent-based phylogenetic techniques, delimitation analyses extensive morphological data.Molecular evidence suggests a...
Despite considerable progress in unravelling the phylogenetic relationships of microhylid frogs, among subfamilies remain largely unstable and many genera are not demonstrably monophyletic. Here, we used five alternative combinations DNA sequence data (ranging from seven loci for 48 taxa to up 73 as 142 taxa) generated using anchored phylogenomics sequencing method (66 loci, derived conserved genome regions, Sanger (seven tackle this problem. We assess effects character sampling, taxon...
Micryletta inornata (Boulenger 1890), the type species of genus Micryletta, was originally described from island Sumatra in Indonesia. Subsequently, this has been widely reported Sundaland (Sumatra and Malay Peninsula), Indo-China, Northeast India South Andaman, up to southern China Taiwan. However, since original description there no further report locality or island. During a herpetofaunal survey Sumatra, several specimens that are morphologically concordant with syntypes M. were found,...
Overseas dispersals are often invoked when Southern Hemisphere terrestrial and freshwater organism phylogenies do not fit the sequence or timing of Gondwana fragmentation. We used dispersal-vicariance analyses molecular timetrees to show that two species-rich frog groups, Microhylidae Natatanura, display congruent patterns spatial temporal diversification among Gondwanan plates in Late Cretaceous, long after presumed major tectonic break-up events. Because amphibians notoriously...
The taxonomy of the Asian tree frog genus Feihyla has been in a state flux ever since its proposal 2006. Allocation species to remains confusing, particularly with respect closely related Chirixalus (formerly Chiromantis sensu lato). At same time, several are known only from cursory descriptions and remain poorly studied. In this study, we review systematics clarify generic placement members along all other currently assigned Chirixalus. Based on integrative evidence gathered new...
Molecular dating studies typically need fossils to calibrate the analyses. Unfortunately, fossil record is extremely poor or presently nonexistent for many species groups, rendering such analysis difficult. One group Asian horned frogs (Megophryinae). Sampling all generic nomina, we combined a novel ∼5 kb dataset composed of four nuclear and three mitochondrial gene fragments produce robust phylogeny, with an extensive external morphological study working taxonomy group. Expanding molecular...
A systematic revision of the genus Hylarana in Western Ghats-Sri Lanka biodiversity hotspot is presented. Species delineation complicated due to a lack distinct colour differences or striking morphological characters, leading potential misidentification. We conducted extensive surveys throughout and performed multiple gene (16S, COI Cytb) barcoding using 103 samples collected from cultivated land natural habitats. Genetic distance comparisons Neighbor Joining trees indicated presence at...
Anurans in Peninsular India exhibit close biogeographical links with Gondwana as well Laurasia, often explainable by the geological history of Indian subcontinent; its breakup from Gondwanan landmasses followed long isolation that resulted diversification endemic lineages, and subsequent land connections Asia enabled dispersal widespread groups. Although widely distributed, frog subfamily Microhylinae mostly comprises geographically restricted genera found either Southeast East or Sri Lanka....
The Old World tree frogs (Anura: Rhacophoridae), with 387 species, display a remarkable diversity of reproductive modes – aquatic breeding, terrestrial gel nesting, foam nesting and direct development. evolution these has until now remained poorly studied in the context recent phylogenies for clade. Here, we use newly obtained DNA sequences from three nuclear two mitochondrial gene fragments, together previously published sequence data, to generate well‐resolved phylogeny which determine...
Northeast India is a well-established region of biological importance but remains poorly understood with regards to the species level identifications many its extant amphibians. In this study we examined small sized frogs from genus Megophrys recently collected remote and suburban forests in northeast Indian states Meghalaya Arunachal Pradesh, which have identified three new species. vegrandis sp. nov., ancrae nov. oropedion are compared all known congeners surrounding regions they differ...
Despite renewed interest in the biogeography and evolutionary history of Old World tree frogs (Rhacophoridae), this family still includes enigmatic with ambiguous phylogenetic placement. During fieldwork four northeastern states India, we discovered several populations hole breeding oophagous tadpoles. We used molecular data, consisting two nuclear three mitochondrial gene fragments for all known rhacophorid genera, to investigate position these new frogs. Our analyses identify a previously...
Since its description from the Eaglenest Wildlife Sanctuary in Arunachal Pradesh of India, Leptobrachium bompu Sondhi & Ohler, 2011 has been considered a rarely sighted species with presumed low population density. The continues to be known handful specimens and little studied about it thereafter. Notably, molecular identity L. type locality itself remains unassessed. Through our recent field surveys state, we have able study dispel misconceptions around rarity this by reporting several...
Frogs and toads have species-specific repertoires of vocalizations that function in contexts related to reproduction. Although some 6000 anuran species been described date, we comparatively few descriptions their vocalizations, which are among most conspicuous behaviors. Statistical vocal key understanding the evolution frog communication systems play potentially important roles conservation systematics. The primary objective this study was describe repertoire calling behavior Ponmudi Bush...
Chemical signaling in animals often plays a central role eliciting variety of responses during reproductive interactions between males and females. One the best-known vertebrate courtship pheromone systems is sodefrin precursor-like factors (SPFs), family two-domain three-finger proteins with female-receptivity enhancing function, currently only known from salamanders. The oldest divergence active components single salamander species dates back to Late Paleozoic, indicating that these...
Three new ichthyophiid species, Ichthyophis khumhzi sp. nov., moustakius nov. and sendenyu from the northeast Indian states of Manipur Nagaland, are described on basis morphological analysis material. The material (16 specimens) more than doubles number caecilian specimens reported in previous literature, increases fauna region to seven species. Two species have very distinctive, moustache-like stripes between their tentacles nares, a feature not other ichthyophiids. Diagnoses, type...
Northeast Indian amphibian systematics and taxonomy is receiving increasing interest from herpetologists in recent years as remote, previously unexplored areas become more accessible for surveying. Even locations nearby cosmopolitan cities have the potential to produce taxonomic novelties. Herein we describe a new species of Megophrys foot-hills East Khasi Hills, northern Meghalaya, adjacent forest Garbhanga Reserve Forest, Mayeng Hill Forest city Guwahati, southern Assam. megacephala sp....
Anurans show the highest diversity in reproductive modes of all vertebrate taxa, with a variety associated breeding behaviours. One striking feature anuran reproduction is amplexus. During this process, which male clasps female, both individuals' cloacae are juxtaposed to ensure successful external fertilization. Several types amplexus have evolved diversification anurans, and secondary loss has been reported few distantly related taxa. Within Nyctibatrachus, genus endemic Western Ghats...