Nayana Wijayathilaka

Nayana Wijayathilaka
University of Sri Jayewardenepura · Department of Zoology

PhD (Zoology)

About

31
Publications
28,856
Reads
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266
Citations
Citations since 2016
14 Research Items
243 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Additional affiliations
January 2015 - November 2015
The Open University of Sri Lanka
Position
  • Visiting Lecturer
May 2012 - June 2016
University of Peradeniya
Position
  • PhD Student
March 2010 - March 2012
The Open University of Sri Lanka
Position
  • Temporary demonstrator
Education
May 2003 - May 2007
University of Peradeniya
Field of study
  • Zoology (Hons)

Publications

Publications (31)
Article
Full-text available
Vocalizing behavior of frogs and toads, once quantified, is useful for systematics, rapid spe- cies identification, behavioral experimentation and conservation monitoring. But yet, for many lineages vocalizations remain unknown or poorly quantified, especially in diversity rich tropical regions. Here we provide a quantitative acoustical analysis fo...
Article
Full-text available
Species boundaries of Microhyla rubra of India and Sri Lanka were assessed using the following criteria: genetic barcoding, morphology, and vocalization. We use a ca. 500 bp fragment of the 16S rRNA mitochondrial gene and show that there is an uncorrected pairwise distance of 2.7−3.2% between the Indian and Sri Lankan populations of M. rubra. We sh...
Article
Full-text available
Landscape modification is a key driver of global species extinction. Thus, understanding how species react to changes is essential for effective conservation management in modified landscapes. We examined the impact of selected land use patterns on the critically endangered Ceratophora tennentii in the Knuckles mountain range of Sri Lanka where liz...
Article
Full-text available
The bufonid genus Adenomus, an endemic of the montane and lowland rainforests of central and south-western Sri Lanka, has been considered to comprise of three species, viz. A. kelaartii, A. dasi and A. kandianus, the last of which has been recently highlighted as " the world's rarest toad " . We conducted a survey across the known range of Adenomus...
Article
Full-text available
A systematic revision of the genus Hylarana in the Western Ghats-Sri Lanka biodiversity hotspot is presented. Species de-lineation in Hylarana is complicated due to a lack of distinct colour differences or striking morphological characters, leading to potential misidentification. We conducted extensive surveys throughout the Western Ghats-Sri Lanka...
Article
Full-text available
Sri Lanka is an amphibian hotspot of global significance. Its anuran fauna is dominated by the shrub frogs of the genus Pseudophilautus . Except for one small clade of four species in Peninsular India, these cool-wet adapted frogs, numbering some 59 extant species, are distributed mainly across the montane and lowland rain forests of the island. Wi...
Article
Full-text available
Acoustic inventory of Sri Lankan amphibians is still in a primitive stage. So far, only 20 amphibian species are known acoustically and are about 16% of the island amphibian fauna. Altogether, twelve publications provide primary acoustic characters, yet the majority of them are not quantitative. Bioacoustics is a powerful tool that can use in many...
Book
Full-text available
Sri Lanka’s location, historic and geologic isolation from the continental landmass, topography and climate act to shape its biogeography and biodiversity, including conferring a remarkably high level of endemism, given its close proximity to the mainland. The island hosts several ‘point endemic1 species and even monotypic endemic genera. However t...
Article
Full-text available
This study presents a systematic revision of South Asian members of the taxonomically challenging genus Microhyla Tschudi, 1838. Species relationships and diagnostic characters are determined by integrating molecular, morphological, and acoustic approaches, through which we also recognize six groups of closely related species. In addition, a new sp...
Article
Full-text available
Discovering and monitoring anuran populations that are in decline, and ascertaining boundaries for cryptic and rare species, is a challenge for their conservation management. Here, we integrate three techniques, bioacoustics (call), niche modeling and DNA barcoding as a test case to investigate how the combination of these methods can enhance searc...
Conference Paper
Full-text available
Keeping elephants in captivity is a centuries- old practice in many countries including Sri Lanka. Although captive management of elephants is challenging, there are few studies that focus on species-specific indicators that can be used to improve the wellbeing of captive individuals. Behavioral observation is one indicator that can be used as a to...
Article
Full-text available
The monotypic genus Lankanectes, considered an evolutionary long branch with India’s Nyctibatrachus as its sister lineage, is represented by L. corrugatus, a species widely distributed within the wet zone of Sri Lanka up to 1500 m asl, where it in- habits a variety of lotic and lentic habitats. Here, following an integrative taxonomic approach usin...
Article
Full-text available
The monotypic genus Lankanectes, considered an evolutionary long branch with India's Nyctibatrachus as its sister lineage, is represented by L. corrugatus, a species widely distributed within the wet zone of Sri Lanka up to 1500 m asl, where it inhabits a variety of lotic and lentic habitats. Here, following an integrative taxonomic approach using...
Article
Full-text available
Based on a recent molecular phylogenetic study, the South Asian microhylid genus Uperodon (subfamily Microhylinae) currently comprises of 12 valid species that are largely restricted to India and Sri Lanka. Considering the revised generic-level status of its various members, here we review the taxonomy of all known species in this genus and clarify...
Article
Full-text available
Species boundaries and patterns of gene flow in Dwarf toads, Duttaphrynus scaber and D. atukoralei, were assessed using mitochondrial DNA markers. Samples from four populations in Sri Lanka (Mihintale, Ampara, Yala, Galle) were analyzed for three mitochondrial gene fragments (16S rRNA, COI and Cyt b) along with four Genbank sequences of 16S rRNA fr...
Article
Full-text available
Endemic to Sri Lanka, genus Adenomus contains two torrent-associated toad species whose ecology and natural history in the wild is virtually unknown. Adenomus kelaartii is relatively common, with a wide geographic distribution. Its sister species, A. kandianus, however, is restricted to two isolated populations in fast-disappearing montane and sub-...
Preprint
Full-text available
Endemic to Sri Lanka, genus Adenomus contains two torrent-associated toad species whose ecology and natural history in the wild is virtually unknown. Adenomus kelaartii is relatively common, with a wide geographic distribution. Its sister species, A. kandianus , however, is restricted to two isolated populations in fast-disappearing montane and sub...
Article
Full-text available
Endemic to Sri Lanka, genus Adenomus contains two torrent-associated toad species whose ecology and natural history in the wild is virtually unknown. Adenomus kelaartii is relatively common, with a wide geographic distribution. Its sister species, A. kandianus, however, is restricted to two isolated populations in fast-disappearing montane and sub-...
Article
Full-text available
The biology of Nacaduba pactolus ceylonica (Large Four-lineblue ), a rare butterfly endemic to Sri Lanka is described with a report of Entada rheedii (Fabaceae) as the first known larval host plant. Information pertaining to the distribution of this butterfly is also provided.
Article
Full-text available
Anax ephippiger is a widespread dragonfly species whose range extends from Sri Lanka and India through Africa to the Mediterranean region and Europe. However, the species is previously known only from two sightings in Sri Lanka. Thirty-eight years after the last sighting of the species, the authors photographed a male A. ephippiger on 3rd of Novemb...
Article
Full-text available
The spread of invasive plants poses a serious threat to the composition, structure, and function of biotic communities world-wide. Some native animals, however, adapt to use invasive plants as living spaces. We studied such a relationship between the invasive bush European Gorse (Ulex europaeus) and the endemic Black-cheeked Lizard (Calotes nigrila...
Article
A study on competitive behavior among three dragonfly species (Neurothermis ramburri, Orthetrum chrysis and Tyriobapta torrida) was conducted along the trail to Belian Camp in the Maliau Basin Conservation Area. Two sampling sites were set up to observe the perching behavior of the dragonflies. From general observations, it is known that all three...

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Projects

Projects (6)
Project
Comprehensive revision of their taxonomy, finding the evolutionary relationships and update the distributions.