Suhridam Roy

Research Scholar, Institutional staff

Vof1 19

M.Sc. Forestry, Forest Research Institute
PGDELP, WWF-India
B.Sc. Zoology, University of Calcutta

I have joined NCF in January, 2017 as a PhD student. I am interested in animal behavior. I had been a part of NCF high altitude team during my master’s dissertation and had undertaken a behavioral ecology project investigating patterns of prey-predator and predator-predator interactions over space and time.

For my doctoral research, I will be looking into the duet of a non-passerine large waterbird species, Sarus Crane. Birds with its diverse range of vocal communication, including calls, songs, duets and choruses, have inspired musicians, artists and a wide range of researchers. Among the diverse vocal behaviours in birds, I got attracted towards the duetting behaviour of certain passerine and non-passerine birds. Duet is a coordinated singing event between two partners. Saying that one can think of many questions, like: why do the partners decide to sing together instead of singing alone? What is the function of duet singing? How do the partners achieve coordination? Does the duet form vary with pairs, habitat or landscape?  There are so many questions, and some of which have been addressed for passerine song birds, but non-passerine duetters such as cranes, have received little attention. In a human modified habitat,  duet modification in relation to anthropogenic disturbances may have repercussions for different life history strategies of cranes. Therefore, I will be looking into forms and functions of duet of Sarus Crane in cropland-wetland mosaics of North India.

Publications

  • Journal Article
    2019
    Distribution and activity pattern of stone marten Martes foina in relation to prey and predators
    Mammalian Biology; Volume 96, May 2019, Pages 110-117
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    Small carnivores are expected to optimize their activity to maximize prey capture and minimize their encounter with  predators. We assessed the activity pattern of the stone marten
    Martes foinain relation to its potential prey, the Himalayan woolly hare Lepus oiostolus and the Royle’s pika Ochotona roylei, and its predators, the red fox Vulpes vulpesand the free-ranging dog Canis familiaris. Using three years of camera trapping data from the Indian Trans-Himalaya, we estimated individual and pair-wise spatio-temporal niche width and overlap, respectively, using Levins’ asymmetric index. Stone martens showed limited space use (spatial niche width 0.16) and nocturnal activity (temporal niche width 0.35). They had high temporal (0.75) and low spatial overlap (0.05) with hares; while they had relatively low temporal (0.33) but higher spatial overlap (0.29) with pikas. Red foxes showed relatively high temporal (1.21) and spatial (0.75) overlap with martens, while free-ranging dogs showed low temporal (0.23) and spatial (0.03) overlap with martens. Although restricted space and time use by pikas might help martens track pikas even with relatively low spatio-temporal overlap, martens may be benefiting from higher temporal overlap with hares. While martens seem to be co-existing with foxes, their nocturnal activity might be driven by a trade-off between consuming prey and avoidance of diurnal predators like dogs.

  • Popular Article
    2017
    Life of Pine
    The Hindu in School, 8 March

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