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Bufo melanostictus

About: Bufo melanostictus is a research topic. Over the lifetime, 196 publications have been published within this topic receiving 1168 citations.


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Journal ArticleDOI
TL;DR: Injection of cadmium chloride in a toad increases both the 5-3β-Hydroxy-steroid dehydrogenase and 17β-hydroxysteroid dehydration activities in Bidder's organ.
Abstract: Injection of cadmium chloride in a toad increases both theΔ5-3β-hydroxy-steroid dehydrogenase and 17β-hydroxysteroid dehydrogenase activities in Bidder's organ.

18 citations

Journal ArticleDOI
TL;DR: It is indicated that amphibian migration should be taken into account when roadside ditches are being planned and civil engineering should consider the needs of the amphibians’ living space and thereby reduce its impact on the amphibian’ original habitat, so that human beings live in harmony with nature.

18 citations

Journal ArticleDOI
TL;DR: The pattern of mucin secretion of the gastrointestinal tract of the toad was investigated by histochemical methods and found that Goblet cells of the small intestine and cloaca secreted acid mucins, which were predominently sulphated mucins.
Abstract: The pattern of mucin secretion of the gastrointestinal tract of the toad (B. melanostictus) was investigated by histochemical methods. The goblet cells of the oesophagus secreted mainly acid mucins which were sialomucins, while the cells lining the surface of the stomach produced neutral mucins only. Goblet cells of the small intestine and cloaca secreted acid mucins, which were predominently sulphated mucins.

17 citations

Journal ArticleDOI
TL;DR: Amphibian community structure in five tropical sites was studied using dominance, diversity, evenness indices, niche breadth and overlapping scores and association analysis to indicate habitat generalists and habitat specialists indicating narrow tolerance to environmental gradients.
Abstract: Amphibian community structure in five tropical sites was studied using dominance, diversity, evenness indices, niche breadth and overlapping scores and association analysis. Ten species of amphibians with average density/ha varying from 8 to 49 in different sites were collected. Rana limnocharis and Bufo melanostictus were respectively the dominant amphibia in paddy fields and other sites. Niche breadth scores indicated Rana limnocharis, Bufo melanostictus and Rana cyanophlyctis as habitat generalists indicating wide tolerance to environmental gradients. Five frog species i.e. Rana tigerina, Microhyla ornata, Ramanella variegata, Uperedon systoma and Polypedates maculatus were considered habitat specialists indicating narrow tolerance to environmental gradients. Niche breadth scores were found to be a function of the cumulative relative abundance value of different species. The niches of Rana limnocharis and Rana cyanophlyctis, Bufo melanostictus and Bufo stomaticus showed maximum overlapping. Rana tigerina showed maximum niche overlapping with Rana variegata in paddy fields and with Microhyla ornata when all sites were taken together. The coefficient of community index was maximum between the paddy fields and minimum between the paddy fields and forest site. Rana tigerina occurred very sparsely and analysis of data indicates that its population are threatened and require conservation measure.

17 citations

Journal ArticleDOI
TL;DR: Five novel bufotoxins, bufotalin 3-suberoyl-L-histidine, -3- methylhistidine and -1-methylhistidine esters and 19-hydroxybufalin 3-SuberoyL-L/L- historicalidine, were separated by usual chromatographic methods including reversed phase high-performance liquid chromatography, and their structures were elucidated by degradative and synthetic means.
Abstract: The occurrence of new bufotoxins, in which L-histidine, L-3-methylhistidine, or L-1-methylhistidine replaces the arginine residue of hitherto known "bufotoxin, " in the skin of the Formosan toad, Bufo melanostictus SCHNEIDER, is reported. Five novel bufotoxins, bufotalin 3-suberoyl-L-histidine, -3-methylhistidine and -1-methylhistidine esters and 19-hydroxybufalin 3-suberoyl-L-histidine and -3-methylhistidine esters, were separated by usual chromatographic methods including reversed phase high-performance liquid chromatography, and their structures were elucidated by degradative and synthetic means.

16 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20211
20201
20191
20182
20172
20162