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Biju S. D. - One of the best experts on this subject based on the ideXlab platform.
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FIGURE 4 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 4. Four morphologically recognized Fejervarya groups in the Western Ghats. A – B. Fejervarya nilagirica group: A. Fejervarya nilagirica in life (male, SDBDU 2014.2772); B. Fejervarya keralensis in life (male, SDBDU 2015.3139); C. Fejervarya rufescens group, Fejervarya rufescens in life (male, SDBDU 2015.3070); D. Fejervarya sahyadris group, Fejervarya sahyadris in life (male, SDBDU 2015.3046); E – F. Fejervarya syhadrensis group: E. Fejervarya syhadrensis in life (male, SDBDU 2015.2934); F. Fejervarya granosa in life (male, SDBDU 2014.2541). Numbers on the panels represents: 1. dorsal view, 2. ventral view of foot showing the inner metatarsal tubercle, 3. schematic illustration of foot webbing, 4. thighs showing the marking and colour pattern, 5. lateral view showing the groin markings
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FIGURE 3 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 3. Geographical distribution of five species in Fejervarya rufescens group of the Western Ghats, Peninsular India. The Western Ghats biodiversity hotspot region is shown in orange colour. Locality details are referenced in Table 3
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FIGURE 6 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 6. PCA plot for the first two principal component axes showing morphometric differentiation among adult males of five species in the Fejervarya rufescens groups of the Western Ghats. Factor loadings for each component are provided in Table 4
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FIGURE 9 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 9. Holotype of Fejervarya cepfi sp. nov. (ZSI / WGRC / V / A / 937): A. dorsolateral view, in life; B. dorsal view, in preservation; C. ventral view, in preservation; D. lateral view of head, in preservation; E. ventral view of hand, in preservation; F. ventral view of foot, in preservation; G. schematic illustration of foot webbing
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FIGURE 10 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 10. Holotype of Fejervarya kadar sp. nov. (ZSI / WGRC / V / A / 940): A. dorsolateral view, in life; B. dorsal view, in preservation; C. ventral view, in preservation; D. lateral view of head, in preservation; E. ventral view of hand, in preservation; F. ventral view of foot, in preservation; G. schematic illustration of foot webbing
Garg Sonali - One of the best experts on this subject based on the ideXlab platform.
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FIGURE 4 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 4. Four morphologically recognized Fejervarya groups in the Western Ghats. A – B. Fejervarya nilagirica group: A. Fejervarya nilagirica in life (male, SDBDU 2014.2772); B. Fejervarya keralensis in life (male, SDBDU 2015.3139); C. Fejervarya rufescens group, Fejervarya rufescens in life (male, SDBDU 2015.3070); D. Fejervarya sahyadris group, Fejervarya sahyadris in life (male, SDBDU 2015.3046); E – F. Fejervarya syhadrensis group: E. Fejervarya syhadrensis in life (male, SDBDU 2015.2934); F. Fejervarya granosa in life (male, SDBDU 2014.2541). Numbers on the panels represents: 1. dorsal view, 2. ventral view of foot showing the inner metatarsal tubercle, 3. schematic illustration of foot webbing, 4. thighs showing the marking and colour pattern, 5. lateral view showing the groin markings
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FIGURE 3 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 3. Geographical distribution of five species in Fejervarya rufescens group of the Western Ghats, Peninsular India. The Western Ghats biodiversity hotspot region is shown in orange colour. Locality details are referenced in Table 3
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FIGURE 6 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 6. PCA plot for the first two principal component axes showing morphometric differentiation among adult males of five species in the Fejervarya rufescens groups of the Western Ghats. Factor loadings for each component are provided in Table 4
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FIGURE 9 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 9. Holotype of Fejervarya cepfi sp. nov. (ZSI / WGRC / V / A / 937): A. dorsolateral view, in life; B. dorsal view, in preservation; C. ventral view, in preservation; D. lateral view of head, in preservation; E. ventral view of hand, in preservation; F. ventral view of foot, in preservation; G. schematic illustration of foot webbing
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FIGURE 10 in Description of four new species of Burrowing Frogs in the Fejervarya rufescens complex (Dicroglossidae) with notes on morphological affinities of Fejervarya species in the Western Ghats
2017Co-Authors: Garg Sonali, Biju S. D.Abstract:FIGURE 10. Holotype of Fejervarya kadar sp. nov. (ZSI / WGRC / V / A / 940): A. dorsolateral view, in life; B. dorsal view, in preservation; C. ventral view, in preservation; D. lateral view of head, in preservation; E. ventral view of hand, in preservation; F. ventral view of foot, in preservation; G. schematic illustration of foot webbing
Masayuki Sumida - One of the best experts on this subject based on the ideXlab platform.
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GENETIC DIVERGENCE AND GEOGRAPHIC DISTRIBUTION OF FROGS IN GENUS Fejervarya FROM INDONESIA INFERRED FROM MITOCHONDRIAL 16S rRNA GENE ANALYSIS
TREUBIA, 2014Co-Authors: Nia Kurniawan, Tjong Ho Djong, Tesri Maideliza, Amir Hamidy, Mahmudul Hasan, Takeshi Igawa, Masayuki SumidaAbstract:The Indonesian archipelago is an ideal setting for the study of speciation and biogeography. This archipelago is divided into three island groups based on zoogeography: Sundaland, Wallacea and the Australian region. In this paper we used frogs in genus Fejervarya (Bolkay) to study biogeography and examine patterns of gene flow across proposed zoogeographic boundaries. Several molecular studies on Fejervarya species from Indonesia have been carried out, but comparative studies among members of the genus Fejervarya have yet to be performed. In order to elucidate genetic divergence and geographic distribution of these frogs, we conducted a molecular analysis of the mitochondrial 16S rRNA gene using 179 frogs from five Fejervarya species. In total we collected from 32 localities in Sumatra, Kalimantan (Indonesian part of Borneo), Java, Bali, Sulawesi and Lesser Sunda Islands in Indonesia. Molecular phylogenetic analysis recovered 35 haplotypes and showed that frogs in the genus Fejervarya were divided into two well-supported clades. The first group were of three species, F. limnocharis, F. iskandari and F. cf. verruculosa and the other group clade consisted of Fejervarya cancrivora and Fejervarya sp. (Sulawesi-type). The average sequence divergence among these four species ranged from 1.09 to 16.03% (mean = 11.29±2.83%). The present results clearly show that there are five Fejervarya species in the Indonesian archipelago. Fejervarya limnocharis and F. cancrivora are widely distributed and sympatric in Sumatra, Borneo and Java. Fejervarya iskandari is not endemic to Java and also occurs in the Lesser Sundas. Fejervarya cf. verruculosa and Fejervarya sp. (Sulawesi-type) are endemic to Lesser Sunda and Sulawesi Island, respectively. Key words: Fejervarya, genetic divergence, geographic distribution, 16S rRNA gene
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A New Species of the Fejervarya limnocharis Complex from Japan (Anura, Dicroglossidae)
Zoological science, 2011Co-Authors: Tjong Ho Djong, Masafumi Matsui, Mitsuru Kuramoto, Midori Nishioka, Masayuki SumidaAbstract:We describe a new species of dicroglossid frog of the Fejervarya limnocharis complex from western Honshu, Japan Mainland. The new species, Fejervarya kawamurai, is genetically closer to F. sakishimensis than to F. limnocharis. It differs from F. sakishimensis by smaller tympanum, head, forelimb, hindlimb, foot, and tibia lengths, all relative to snout-vent length, and from F. multistriata by relatively shorter forelimb, hindlimb, foot, and tibia. From F. limnocharis and F. iskandari, it is differentiated by relatively smaller forelimb, hindlimb, foot, and tibia lengths. Taxonomic problems of Fejervarya populations occurring in Central Ryukyus, continental China, and Taiwan are discussed.
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Molecular Phylogeny of the Diversified Frogs of Genus Fejervarya (Anura: Dicroglossidae)
Zoological science, 2010Co-Authors: Manabu Kotaki, Masafumi Matsui, Tjong Ho Djong, Atsushi Kurabayashi, Mitsuru Kuramoto, Masayuki SumidaAbstract:Consensus on the taxonomic system and phylogenetic relationships for the anuran genus Fejervarya has yet to be established. Morphological characters in this genus are generally unsuitable for species identification. To carry out molecular species identification and solve phylogenetic problems, we collected 67 Fejervarya specimens from 12 Asian countries and sequenced part of the mitochondrial (mt) Cytb gene. We also sequenced the mt 12S and 16S rRNA genes and seven nuclear genes (BDNF, CXCR4, NCX1, RAG-1, RAG-2, Rhod, and Tyr) for 25 Fejervarya taxa. These molecular markers appear to be adequate for the identification of species. We subjected the molecular data molecular to phylogenetic analyses. In the resulting trees, topotypic F. limnocharis and “F. multistriata” (from China) formed a clade. On the other hand, neither “F. limnocharis” from the Japan mainland nor “F. limnocharis” from eastern Taiwan formed a clade with the real F. limnocharis, and the genetic divergences were larger than the species threshold for frog taxa proposed in previous studies (> 3% for 16S). These results may suggest that “F. multistriata” is a junior synonym of F. limnocharis, or that only some of the populations now recognized as “F. multistriata” correspond to F. limnocharis. Our results also suggest that several cryptic species may be included among the widely distributed Fejervarya species. Finally, our datasets support paraphyly for the genus Fejervarya, although alternative phylogenetic topologies, including Fejervarya monophyly, were not rejected by KH and SH tests.
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Genetic Divergence and Reproductive Isolation in the Genus Fejervarya (Amphibia: Anura) from Bangladesh Inferred from Morphological Observations, Crossing Experiments, and Molecular Analyses
Zoological science, 2008Co-Authors: Mohammed Mafizul Islam, Mitsuru Kuramoto, Midori Nishioka, Nia Kurniawan, Mahmudul Hasan, Naoko Kurose, Mdmukhlesur Rahman Khan, Toshitaka Nishizawa, Mohammad Shafiqul Alam, Masayuki SumidaAbstract:Abstract In the present study, morphological examinations, crossing experiments and molecular analyses were performed to elucidate the degree of genetic divergence and phylogenetic relationships within the genus Fejervarya from Bangladesh and other Asian countries. Morphological characteristics revealed that Fejervarya species from Bangladesh were divided into four distinct groups: large, medium, small, and mangrove types. Crossing experiments indicated the involvement of three reproductive isolating mechanisms: gametic isolation between the large type and mangrove type, hybrid inviability between the large type and two other types, and hybrid sterility between the medium and small types. Experimental results also indicated that these four types of frogs merit the status of individual species of Fejervarya. Molecular analyses based on mtDNA gene sequences showed that the Bangladesh Fejervarya species were largely divided into three groups: the mangrove type, large type, and others, with the last further s...
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genetic divergences and phylogenetic relationships among the Fejervarya limnocharis complex in thailand and neighboring countries revealed by mitochondrial and nuclear genes
Zoological Science, 2008Co-Authors: Manabu Kotaki, Masafumi Matsui, Wichase Khonsue, Tjong Ho Djong, Manuj Tando, Atsushi Kurabayashi, Masayuki SumidaAbstract:To clarify the genetic divergence in the F. limnocharis complex from Thailand and neighboring countries and to elucidate the phylogenetic problems of this taxon, we analyzed partial sequences of the mitochondrial 12S and 16S rRNA genes and the nuclear CXCR4, NCX1, RAG-1, and tyrosinase genes. The F. limnocharis complex from Thailand had three distinct haplotypes for 12S and 16S rRNA genes. Nucleotide similarities and the phylogenetic relationships indicated that the haplotype 1 group corresponded to the real “F. limnocharis”, the haplotype 2 group was F. orissaensis or closely related to it, and the haplotype 3 group was possibly an undescribed species. Mitochondrial gene data also showed two major clades of the genus Fejervarya, the Southeastern and South Asian groups. Although F. orissaensis is so far known only from Orissa in India, the haplotype 2 group was observed in Thailand. This distribution pattern and the phylogeny suggested that the origin of F. orissaensis and the haplotype 2 group might lie in Southeast Asia. There was also evidence suggesting that the haplotype 3 group originated in the South Asian area and has spread to northern Thailand. The nuclear gene data did not support the monophyly of the haplotypes recognized by mitochondrial genes. This incongruence between the mitochondrial and nuclear data seems to be caused by ancestral polymorphic sites contained in nuclear genes. Although neither the mitochondrial nor the nuclear data clarified intergeneric relationships, the nuclear data rejected the monophyly of the genus Fejervarya.
Sannanegunda Venkatarama Bhatta Krishnamurthy - One of the best experts on this subject based on the ideXlab platform.
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Individual and combined effects of organophosphate and carbamate pesticides on the cricket frog Fejervarya limnocharis
Environmental Geochemistry and Health, 2019Co-Authors: Makkimane Bhaskar Rao Nataraj, Sannanegunda Venkatarama Bhatta KrishnamurthyAbstract:Many amphibians use water bodies associated with agro-ecosystem for breeding and thus are exposed to multiple chemicals. Fejervarya limnocharis is a common frog occurring in rice paddy fields. The timings of pesticide application generally coincide with the tenure of the occurrence of tadpoles in shallow waters of paddy fields. Malathion and carbaryl are frequently used in rice paddy fields to control leafhoppers and rice bugs, respectively. Therefore, effects of mixtures of malathion and carbaryl insecticides on the survival of tadpoles and emergence of froglets of Fejervarya limnocharis were studied in the laboratory using combinations of three concentrations of carbaryl (0, 25, 50 µg l^−1) with four concentrations of malathion (0, 100, 250, 500 µg l^−1). Both malathion and carbaryl were found to be toxic to tadpoles. A reduction in tadpole survival and froglet emergence was recorded with increasing concentrations of carbaryl and malathion. We found significant interaction between carbaryl and malathion on tadpole survival and froglet emergence. Tadpoles exposed to combination of pesticides showed early emergence as froglets compared to control. The extent of toxicity and pesticide interactions are varied when mixed in different concentrations. The reduction in survival, froglet emergence and delay in emergence of metamorphs can occur in rice paddy field as both pesticides are used simultaneously. Therefore, combinations of pesticides may have significant negative effects on the frog population of agro-ecosystems, which requires further confirmation through appropriate field experiments.
Measey John - One of the best experts on this subject based on the ideXlab platform.
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What's for dinner? Diet and potential trophic impact of an invasive anuran Hoplobatrachus tigerinus on the Andaman archipelago
'PeerJ', 2018Co-Authors: Mohanty, Nitya Prakash, Measey JohnAbstract:CITATION: Mohanty, N. P. & Measey, J. 2018. What's for dinner? Diet and potential trophic impact of an invasive anuran Hoplobatrachus tigerinus on the Andaman archipelago. PeerJ, 6:e5698, doi:10.7717/peerj.5698.The original publication is available at https://peerj.comENGLISH ABSTRACT: Amphibian invasions have considerable detrimental impacts on recipient ecosystems. However, reliable risk analysis of invasive amphibians still requires research on more non-native amphibian species. An invasive population of the Indian bullfrog, Hoplobatrachus tigerinus, is currently spreading on the Andaman archipelago and may have significant trophic impacts on native anurans through competition and predation. We carried out diet analyses of the invasive H. tigerinus and native anurans, across four habitat types and two seasons; we hypothesized that (i) small vertebrates constitute a majority of the H. tigerinus diet, particularly by volume and (ii) the diet of H. tigerinus significantly overlaps with the diet of native anurans, thereby, leading to potential competition. We assessed the diet of the invasive H. tigerinus (n = 358), and individuals of the genera Limnonectes (n = 375) and Fejervarya (n = 65) and found a significant dietary overlap of H. tigerinus with only Limnonectes. Small vertebrates, including several endemic species, constituted the majority of H. tigerinus, diet by volume, suggesting potential impact by predation. Prey consumption and electivity of the three anurans indicated a positive relationship between predator-prey body sizes. Individuals of H. tigerinus and Fejervarya chose evasive prey, suggesting that these two taxa are mostly ambush predators; individuals of Limnonectes chose a mixture of sedentary and evasive prey indicating that the species employs a combination of ‘active search’ and ‘sit and wait’ foraging strategies. All three species of anurans mostly consumed terrestrial prey. This intensive study on a genus of newly invasive amphibian contributes to knowledge of the impact of amphibian invasions, and elucidates the feeding ecology of H. tigerinus, and species of the genera Limnonectes and Fejervarya. We also stress the necessity to evaluate prey availability and volume in future studies for meaningful insights into diet of amphibians.https://peerj.com/articles/5698/Publisher's versio
