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Differences in behaviour of the nilgai (Boselaphus tragocamelus) during foraging in forest versus in agricultural land

Published online by Cambridge University Press:  19 August 2016

Abhijeet Bayani  and
Milind Watve
Abhijeet Bayani
Affiliation:
Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
Milind Watve*
Affiliation:
Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411008, Maharashtra, India
*
1Corresponding author. Email: milind@iiserpune.ac.in
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Abstract:

The nilgai (Boselaphus tragocamelus) is a widespread species in India that forages in forest as well as on agricultural lands. In Tadoba-Andhari Tiger Reserve, India, it typically takes to crop-raiding at night, while it rests and forages in forest during the daytime. We studied changes in herding and vigilance behaviour during foraging in forest versus in agricultural lands and monsoon versus post-monsoon in the years 2012–2015. We recorded number of individuals (herd size), sex-age composition and number of individuals per unit area of herd's spread (compactness) for every herd under observation using instantaneous scan sampling in forest (176 herds) and farms (321 herds), while spatial trends in herd size on agricultural lands were studied using transect sampling at night. Vigilance behaviour was studied using focal-animal sampling in forest (n = 91) and farms (n = 52) by choosing a single individual per herd under 15 min of observation. Herd sizes were significantly larger in forest (monsoon, median = 3, interquartile range (IQR) = 2–6, post-monsoon, median = 5, IQR = 3–8) than on farms adjacent to forest (monsoon = 3, IQR = 1–5, post-monsoon = 4, IQR = 2–5) and further decreased non-linearly with distance from the forest edge. Herds were more compact, i.e. with smaller inter-individual distance in forests than on farms. Crop-raiding was found to be female-biased, and adult males as well as newborn calves were observed on agricultural lands significantly less frequently. The median vigilance frequency was significantly higher on farms (1.4 min−1) as compared with forests (0.205 min−1) but the median unit scan duration was significantly less in farms (6 s) compared with forest (60 s). The observed differences are likely to be due to difference in the nature of risk faced in the two habitats. In forest, detection of ambush predators such as tigers that occur at a low density, requires careful watch and larger herds increase the chances of detection. In contrast, detection of guarding farmers on agricultural lands who are present at a higher density and make their presence conspicuous to drive away crop raiders would need a glance of smaller time duration. As crop-raiding occurs at night, moonlight is likely to affect the frequency of crop-raiding but we did not find evidence for any deterrent effect of moonlight on the frequency of crop-raiding. The data suggest that the nilgai exhibits substantial behavioural plasticity in response to different nature and levels of risks faced in the two habitats.

Keywords

behavioural plasticityBoselaphus tragocameluscrop-raidingforagingherd sizelunar phasessex-age biasvigilance
Type
Research Article
Information
Journal of Tropical Ecology , Volume 32 , Issue 6 , November 2016 , pp. 469 - 481
Copyright
Copyright © Cambridge University Press 2016 

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References

LITERATURE CITED

AHRESTANI, F. S., HEITKÖNIG, I. M. A., VAN LANGEVELDE, F. VAIDYANATHAN, S. MADHUSUDAN, M.D. & PRINS, H. H. T. 2011. Moisture and nutrients determine the distribution and richness of India's large herbivore species assemblage. Basic and Applied Ecology 12:634–642.Google Scholar
ALTMANN, J. 1973. Observational study of behaviour: sampling methods. Behaviour 49:227–267.Google Scholar
BAGCHI, S., GOYAL, S. P. & SANKAR, K. 2003a. Niche relationships of an ungulate assemblage in a dry tropical forest. Journal of Mammalogy 84:981–988.Google Scholar
BAGCHI, S., GOYAL, S. P. & SANKAR, K. 2003b. Habitat separation among ungulates in dry tropical forests of Ranthambhore national park, Rajasthan. Tropical Ecology 44:177–183.Google Scholar
BARNES, R. F. W., DUBIURE, U. F., DANQUAH, E., BOAFO, Y., NANDJUI, A., HEMA, E. M. & MANFORD, M. 2006. Crop-raiding elephant and the moon. African Journal of Ecology 45:112–115.Google Scholar
BAYANI, A., TIWADE, D., DONGRE, A., DONGRE, A. P., PHATAK, R. & WATVE, M. 2016. Assessment of crop damage by protected wild mammalian herbivores on the western boundary of Tadoba–Andhari Tiger Reserve (TATR), central India. PLoS ONE 11:e0153854.Google Scholar
BEAUCHAMP, G. 2003. Group size effects on vigilance: a search for mechanisms. Behavioural Processes 63:111–121.Google Scholar
BEAUCHAMP, G. 2007. Exploring the role of vision in social foraging: what happens to group size, vigilance spacing, aggression and habitat use in birds and mammals that forage at night? Biological Reviews 82:511–525.CrossRefGoogle ScholarPubMed
BEAUCHAMP, G. 2008. What is the magnitude of the group-size effect on vigilance? Behavioural Ecology 19:1361–1368.CrossRefGoogle Scholar
BEAUCHAMP, G. 2015. Animal vigilance: monitoring predators and competitors. Academic Press, Elsevier. 253 pp.Google Scholar
BEAUCHAMP, G. & McNEIL, R. 2003. Vigilance in Greater flamingos foraging at night. Ethology 109:511–520.CrossRefGoogle Scholar
BENDER, D. J., BAYNE, E. M. & BRIGHAM, R. M. 1996. Lunar condition influences coyote (Canis latrans) howling. American Midland Naturalist 136:413–417.Google Scholar
BROWN, B., BRYNTESSON, F., COOPER, S., NYHOLM, B., ROBERTSON, D., BEDFORD, A., HENDRICKS, D., KLIPPENSTEIN, L., POTAPOV, E., DIVISION, S., COLLEGE, B. A. & ATHYN, B. 2011. Moonlight and suburban White-tailed deer movements. Bulletin of New Jersey Academy of Science 56:1–3.Google Scholar
BROWN, J. S. 1999. Vigilance, patch use and habitat selection: foraging under predation risk. Evolutionary Ecology Research 1:49–71.Google Scholar
CHAUHAN, N. P. S. & SAWARKAR, V. B. 1989. Problems of over-abundant populations of nilgai and blackbuck in Haryana and Madhya Pradesh and their management. Indian Forester 115:488–493.Google Scholar
CHIYO, P. I., LEE, P. C., MOSS, C. J., ARCHIE, E. A., HOLLISTER-SMITH, J. A. & ALBERTS, S. C. 2011. No risk, no gain: effects of crop-raiding and genetic diversity on body size in male elephants. Behavioral Ecology 22:552–558.CrossRefGoogle Scholar
COZZI, G., BROEKHUIS, F., MCNUTT, J. W., TURNBULL, L. A., MACDONALD, D. W. & SCHMID, B. 2012. Fear of the dark or dinner by moonlight? Reduced temporal partitioning among Africa's large carnivores. Ecology 93:2590–2599.Google Scholar
DALY, M., BEHRENDS, P. R., WILSON, M. I. & JACOBS, L. F. 1992. Behavioural modulation of predation risk: moonlight avoidance and crepuscular compensation in a nocturnal desert rodent, Dipodomys merriami. Animal Behaviour 44:1–9.Google Scholar
EISENBERG, C., HIBBS, D. E., RIPPLE, W. J. & SALWASSER, H. 2014. Context dependence of elk (Cervus elaphus) vigilance and wolf (Canis lupus) predation risk. Canadian Journal of Zoology 92:727–736.CrossRefGoogle Scholar
FERNANDO, P., WIKRAMNAYAKE, E., WEERKOON, D., JAYASINGHE, L. K. A., GUNAWARDENE, M. & JANAKA, H. K. 2005. Perceptions and patterns of human–elephant conflict in old and new settlements in Sri Lanka: insights for mitigation and management. Biodiversity Conservation 14:2465–2481.Google Scholar
FRID, A. 1997. Vigilance by female Dall's sheep: interactions between predation risk factors. Animal Behaviour 53:799–808.CrossRefGoogle Scholar
GHOSAL, R. & VENKATARAMAN, A. 2013. An adaptive system of vigilance in spotted deer (Axis axis) herds in response to predation. Current Science 104:768–771.Google Scholar
GHUMAN, S. S. 2009. A study of vigilance behaviour of chital (Axis axis) in Pench Tiger Reserve, Madhya Pradesh. M.Sc. dissertation, Saurashtra University, Rajkot.Google Scholar
GRIFFIN, P. C., GRIFFIN, S. C., WAROQUIERS, C. & MILLS, L. S. 2005. Mortality by moonlight: predation risk and the snowshoe hare. Behavioral Ecology 16:938–944.CrossRefGoogle Scholar
GUNN, J., HAWKINS, D., BARNES, R. F. W., MOFULU, F., GRANT, R. A. & NORTON, G. W. 2013. The influence of lunar cycles on crop-raiding elephants; evidence for risk avoidance. African Journal of Ecology 52:129–137.Google Scholar
HILL, C. M. 1997. Crop-raiding by wild vertebrates: the farmer's perspectives in an agricultural community in western Uganda. International Journal of Pest Management 43:77–84.Google Scholar
HUANG, X., KANWAL, J. S., JIANG, T., LONG, Z., LUO, B., YUE, X., GU, Y. & FENG, J. 2015. Situational and age-dependent decision making during life threatening distress in Myotis macrodactylus . PLoS ONE 10:e0132817.Google Scholar
HUNTER, L. T. B. & SKINNER, J. D. 1998. Vigilance behaviour of African ungulates: the role of predation pressure. Behaviour 135:195–211.Google Scholar
JARMAN, P. J. 1974. The social organisation of antelope in relation to their ecology. Behaviour 48:215–267.Google Scholar
JHALA, Y. V. 1993. Damage to Sorghum crop by blackbuck. International Journal of Pest Management 39:23–27.Google Scholar
JOHNSINGH, A. J. T. 1980. Ecology and behaviour of the dhole or Indian wild dog Cuon alpinus, Pallas 1811. with special reference to predator-prey relations at Bandipur. Doctoral dissertation. Madurai University, Tamil Nadu, India.Google Scholar
JOHNSINGH, A. J. T. 1983. Large mammalian prey-predators in Bandipur. Journal of Bombay Natural History Society 80:1–57.Google Scholar
JOHNSINGH, A. J. T. & MANJREKAR, N. 2015. Mammals of South Asia. Vol. II. Universities Press, Hyderabad. 739 pp.Google Scholar
KARANTH, K. K., GOPALASWAMY, A. M., PRASAD, P. K. & DASGUPTA, S. 2013. Patterns of human-wildlife conflict and compensation: insights from Western Ghats protected areas. Biological Conservation 166:175–185.Google Scholar
KIE, J. G. 1999. Optimal foraging and risk of predation: effects on behaviour and social structure in ungulates. Journal of Mammalogy 80:1114–1129.Google Scholar
LASHLEY, M., CHITWOOD, M. C., BIGGERSTAFF, M. T., MORINA, D. L., MOORMAN, C. E. & DePERNO, C. S. 2014. White-tailed deer vigilance: the influence of social and environmental factors. PLoS ONE 9:e90652.Google Scholar
LAUREL, B. J. & BROWN, J. A. 2006. Influence of cruising and ambush predators on 3-dimensional habitat use in age 0 juvenile Atlantic cod Gadus morhua . Journal of Experimental Marine Biology and Ecology 329:34–46.Google Scholar
LESLIE, D. M. 2008. Boselaphus tragocamelus (Artiodactyla: Bovidae). Mammalian Species 813:1–16.Google Scholar
LI, C., ZHOU, L., XU, L., ZHAO, N. & BEAUCHAMP, G. 2015. Vigilance and activity time-budget adjustments of wintering Hooded cranes (Grus monacha), in human-dominated foraging habitats. PLoS ONE 10:e0118928.Google Scholar
LIMA, S. L. 1992. Life in a multi-predator environment: some considerations for anti-predatory vigilance. Annales Zoologici Fennici 29:217–226.Google Scholar
LIMA, S. L. 1995. Back to the basics of anti-predatory vigilance: the group-size effect. Animal Behaviour 49:11–20.Google Scholar
MEHTA, D. 2014. Study on the ecology of nilgai (Boselaphus tragocamelus) in Surashtra. Ph.D. Dissertation. Saurashtra University, Rajkot, India.Google Scholar
MOURITSEN, K. N. 1992. Avoidance in night-feeding dunlins Calidris alpina: a matter of concealment. Ornis Scandinavica (Scandinavian Journal of Ornithology) 23:195–198.Google Scholar
NAMGAIL, T. 2007. Vigilance behaviour of the Tibetan argali Ovis ammon hodgsoni in the Indian trans-Himalaya. Acta Zoologica Sinica 53:195–200.Google Scholar
PARKER, G. A. & MAYNARD SMITH, J. 1990. Optimality theory in evolutionary biology. Nature 348:27–33.Google Scholar
PENTERIANI, V., KUPARINEN, A., DELGADO, M., DEL, M., LOURENÇO, R. & CAMPIONI, L. 2011. Individual status, foraging effort and need for conspicuousness shape behavioural responses of a predator to moon phases. Animal Behaviour 82:413–420.Google Scholar
ROBERTS, G. 1996. Why individual vigilance declines as group size increases. Animal Behaviour 51:1077–1086.Google Scholar
RODE, K. D., CHIYO, P. I., CHAPMAN, C. A. & MCDOWELL, L. R. 2006. Nutritional ecology of elephants in Kibale National Park, Uganda, and its relationship with crop-raiding behaviour. Journal of Tropical Ecology 22:441–449.Google Scholar
SANKAR, K. 1994. The ecology of three large sympatric herbivores (chital, sambar, nilgai) with special reference for reserve management in Sariska Tiger Reserve, Rajasthan. PhD Thesis. University of Rajasthan, Jaipur.Google Scholar
SEKHAR, N. U. 1998. Crop and livestock depredation caused by wild animals in protected areas: the case of Sariska Tiger Reserve, Rajasthan, India. Environmental Conservation 25:160–171.Google Scholar
SHAH, N. & QURESHI, Q. 2007. Social organization and determinants of spatial distribution of khur (Equus hemionus khur). Erforschung der Biologischen Ressourcen der Mongolei (Halle/Saale) 10:189–200.Google Scholar
SHORROCKS, B. & COKAYNE, A. 2005. Vigilance and group size in impala (Aepyceros melampus Lichtenstein): a study in Nairobi National Park, Kenya. African Journal of Ecology 43:91–96.Google Scholar
SINGH, R. V. 1995. Some studies on ecology of nilgai (Boselaphus tragocamelus) with an assessment of damage to agricultural crops and development of strategy for damage control in south-western Haryana. PhD Thesis. Aligarh Muslim University, India.Google Scholar
STEPHENS, D. W, BROWN, J. S. & YDENBERG, R. C. 2007. Foraging behaviour and ecology. University of Chicago Press, Chicago. 502 pp.Google Scholar
SUKUMAR, R. 1989. The Asian elephant: ecology and management. Cambridge University Press, Cambridge. 255 pp.Google Scholar
SUKUMAR, R. & GADGIL, M. 1988. Male-female differences in foraging on crops by Asian elephants. Animal Behaviour 36:1233–1235.CrossRefGoogle Scholar
THAKER, M., VANAK, A. T., OWEN, C. R., OGDEN, M. B. & SLOTOW, R. 2010. Group dynamics of zebra and wildebeest in a woodland savanna: effects of predation risk and habitat density. PLoS ONE 5:e12758.Google Scholar
TREVES, A. 2000. Theory and method in studies of vigilance and aggregation. Animal Behaviour 60:711–722.CrossRefGoogle ScholarPubMed
UNDERWOOD, R. 1982. Vigilance behaviour in grazing African antelopes. Behaviour 79:81–107.Google Scholar
VALEIX, M., LOVERIDGE, A J., CHAMAILLE-JAMMES, S., DAVIDSON, Z., MURINDAGOMO, F., FRITZ, H. & MACDONALD, D. W. 2009. Behavioral adjustments of African herbivores to predation risk by lions: spatio-temporal variations influence habitat use. Ecology 90:23–30.Google Scholar
WANG, Z., LI, Z., BEAUCHAMP, G. & JIANG, Z. 2011. Flock size and human disturbance affect vigilance of endangered Red-crowned cranes (Grus japonensis). Biological Conservation 144:101–105.Google Scholar
WATVE, M., BAYANI, A. & GHOSH, S. 2016a. Crop damage by wild herbivores: insights obtained from optimization models. Current Science (in press).Google Scholar
WATVE, M., PATEL, K., BAYANI, A. & PATIL, P. 2016b. A theoretical model of community operated compensation scheme for crop damage by wild herbivores. Global Ecology and Conservation 5:58–70.Google Scholar
WIKENROS, C., KUIJPER, D. P. J., BEHNKE, R. & SCHIMDT, K. 2015. Behavioural responses of ungulates to indirect cues of an ambush predator. Behaviour 152:1019–1040.Google Scholar
ZOLLNER, P. A. & LIMA, S. L. 2005. Behavioral tradeoffs when dispersing across a patchy landscape. Oikos 108:219–230.Google Scholar