WII Technical Reports/Books/Manuals

Permanent URI for this collectionhttp://192.168.202.180:4000/handle/123456789/314

Browse

Has files: YesSubject: search.filters.subject.Status survey

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Status survey and conservation of the Himalayan salamander Tylototriton verrucosus in the Eastern Himalayas
    (Wildlife Institute of India, Dehradun, 2014) Vasudevan, K.; Kumar, R.S.; Sengupta, S.
    The Himalayan crocodile salamander Tylototriton verrucosus was first described in 1871 from the Nantin, Momien and Hotha valleys, in western Yunnan, China. Subsequently, there have been sporadic reports of the species from Nepal, Bhutan, India, Burma, China, Thailand and Vietnam. At present, the species is known to have a vast geographic distribution and thereby assigned as ‘Least Concern’ by the IUCN. This species shows considerable morphological overlap with 13 other known con-generics from the region, and is now considered to be a species complex. To predict the distribution of the species in India field surveys were conducted during the breeding period between May and August 2012 in parts of northern West Bengal State and northeast India. Along with the data from field surveys, historical data was compiled from published literature, Natural History Museum collections and from GBIF portal. Using ecological niche mapping tool – MAXENT 3.3.3k predictive modeling of the species distribution was done. For the analysis, 61 locations collected from field surveys in northern West Bengal and Manipur State, and 50 locations from archives were used. Fifty percent of the locations were used as training sites for the analysis. Using prior knowledge of the species a candidate set of 19 environmental layers (~1 km2 resolution) from WORLDCLIM 1.4 was used for the analysis. The variables were: precipitation, minimum and maximum temperature for six months, when the species is active during the year, and altitude. The predicted geographic distribution shows the salamander populations to occur in small, discrete sites in mountain ranges of South East Asia. It is hypothesized that historical factors to may have led to the observed pattern in its geographic distribution.
  • No Thumbnail Available
    Item
    Status of tigers, co-predators and prey in India 2018 : Summary report
    (Wildlife Institute of India, Dehradun, 2019) Jhala, Y.V.; Qureshi, Q.; Nayak, A.K.
  • No Thumbnail Available
    Item
    Status of leopards in India 2018
    (Wildlife Institute of India, Dehradun, 2018) Jhala, Y.V.
    Leopard abundance was estimated at the scale of four major tiger conservation landscapes 1) Shivalik Hills and Gangetic plains, 2) Central India and Eastern Ghats, 3) Western Ghats and, 4) North Eastern Hills and Brahmaputra Flood Plains. this exercise not only comes up with tiger numbers for the country but also evaluates the status of co-predators, prey, habitat and human disturbance parameters for all tiger occupied forested landscapes of the country.
  • No Thumbnail Available
    Item
    Assessment of amphibians and reptilian diversity along Ganga river : progress report
    (Wildlife Institute of India, Dehradun, 2021) Das, Abhijit; Hussain, S.A.; Johnson, J.A.; Boruah, Bitupan
    In the present study an attempt has been made to survey the herpetofaunal diversity along Ganga River. The objectives of the study are to determine the species richness and diversity of herpetofauna along Ganga and Alaknanda river ii. To map the distribution of herpetofaunal species along Ganga and Alaknanda river iii. To study the reproductive biology of threatened amphibian species of the Ganga River Basin