Keywords
dietary preferences
faecal microhistology
National park
seasonal feeding behaviour
How to Cite
Abstract
Megaherbivores like the Wild Asian elephant (Elephas maximus) are keystone species, playing a pivotal role in ecosystem dynamics. However, their survival is increasingly threatened by habitat loss and resource constraints due to their extensive spatial and nutritional needs. This study investigates the dietary preferences and feeding behaviours of elephants inhabiting the riverine floodplains of North Bengal, particularly Jaldapara National Park. Using a combination of direct observations, feeding sign analysis along elephant routes, and microhistological faecal analysis, we identified 41 plant species in their diet. Dietary composition revealed a preference for tree species (34.16%), followed by grasses (21.95%), mosses (17.07%), herbs (17.07%), shrubs (4.87%), and climbers (4.87%). The prominence of trees highlights their importance as a critical food resource, while the high diversity of Poaceae emphasizes the significance of grasslands in elephant habitats. A diurnal feeding pattern was observed, with heightened activity during the latter times of the day. These findings underscore the importance of conserving heterogeneous landscapes comprising forests and grasslands to support the dietary requirements of elephants. Additionally, the study provides insights into the ecological adaptations of Asian elephants and highlights the necessity of effective habitat management to ensure the availability of critical food resources throughout the year. The results offer valuable guidance for mitigating human-elephant conflicts and advancing conservation strategies for this ecologically vital yet endangered species
References
Alipayo D, Valdez R, Holechek JL, Cardenas M (1992) Evaluation of Microhistological Analysis for Determining Ruminant Diet Botanical Composition. Journal of Range Management 45: 148. https://doi.org/10.2307/4002773
Baskaran N, Balasubramanian M, Swaminathan S, Desai AA (2010) Feeding Ecology of the Asian Elephant Elephas Maximus Linnaeus in the Nilgiri Biosphere Reserve, Southern India. Journal of Bombay Natural History Society 107: 3–13.
Burton-Roberts R, Cordes LS, Slotow R, Vanak AT, Thaker M, Govender N, Shannon G (2022) Seasonal range fidelity of a megaherbivore in response to environmental change. Scientific Reports 12: 22008. https://doi.org/10.1038/s41598-022-25334-8
Chamrad AD, Box TW (1964) A Point Frame for Sampling Rumen Contents. The Journal of Wildlife Management 28: 473. https://doi.org/10.2307/3798199
Chen J, Deng XB, Zhang L, Bai ZL (2006) Diet composition and foraging ecology of Asian elephants in Shangyong, Xishuangbanna, China. Acta Ecologica Sinica 26: 309–316. https://doi.org/10.1016/s1872-2032(06)60006-1
Duffy K, Os R, Vos S, Aarde J, Ellish G, Stretch A-MB (2002) Estimating impact of reintroduced elephant on trees in a small reserve. African Journal of Wildlife Research 32: 23–29.
Fernando P, Jayasinghe L, Rahula Perera R, Weeratunga V, Kotagama S, Pastorini J (2016) Diet component estimation in Asian elephants by microhistological faecal analysis. Gajah 44: 23–29.
Ghosh C, Ghatak S, Biswas K, Das AP (2021) Status of tree diversity of the Jaldapara National Park in West Bengal, India. Trees, Forests and People 3: 100061. https://doi.org/10.1016/j.tfp.2020.100061
Government of west Bengal Directorate of Forests Wildlife wing (2024) Jaldapara Wildlife Elephant Watching in the Sanctuary. Jaldapara National Park: General information, flora and fauna, park activities.
Guy PR (1981) Review of Serengeti, Dynamics of an Ecosystem by A.R.E. Sinclair & M. Norton-Griffiths. Journal of Applied Ecology 18(1): 336–336. https://doi.org/10.2307/2402507
Holechek JL (1982) Sample Preparation Techniques for Microhistological Analysis. Journal of Range Management 35: 267. https://doi.org/10.2307/3898409
Huang C, Li X, Khanal L, Jiang X (2019) Habitat suitability and connectivity inform a comanagement policy of protected area network for Asian elephants in China. PeerJ 7: e6791. https://doi.org/10.7717/peerj.6791
Joshi R (2018) Food Plants of Elephants in Rajaji National Park, Uttarakhand, India. Journal of the Bombay Natural History Society (JBNHS) 114. https://doi.org/10.17087/jbnhs/2017/v114/101391
Joshi R, Singh R (2007) Asian elephants are losing their seasonal traditional movement tracks: a decade of study in and around the Rajaji National Park, India. Gajah 27: 15–26. Joshi R, Singh R (2008) Feeding behaviour of wild Asian elephants (Elephas maximus) in the Rajaji National Park. The journal of American Science 4: 34–48.
Kalemera MC (1987) Dry season diurnal activity of elephants in Lake Manyara National park, Tanzania. African Journal of Ecology 25: 255–263. https://doi.org/10.1111/j.1365-2028.1987.tb01117.x
Kerley G, Landman M (2006) The impacts of elephants on biodiversity in the Eastern Cape Subtropical Thickets. South African Journal of Science 102: 395–402.
Kerley GIH, Knight MH, de Kock M (1995) Desertification of subtropical thicket in the Eastern Cape, South Africa: Are there alternatives? Environmental Monitoring and Assessment 37: 211–230. https://doi.org/10.1007/BF00546890
Koirala RK, Ji W, Aryal A, Rothman J, Raubenheimer D (2016) Dispersal and ranging patterns of the Asian elephant (Elephas maximus) in relation to their interactions with humans in Nepal. Ethology, Ecology and Evolution 28: 221–231. https://doi.org/10.1080/03949370.2015.1066872
Lefeuvre M, Gouat P, Mulot B, Cornette R, Pouydebat E (2020) Behavioural variability among captive African elephants in the use of the trunk while feeding. PeerJ 8: e9678. https://doi.org/10.7717/peerj.9678
Manoj K, Bhattacharyya R, Padhy PK (2013) Forest and Wildlife Scenarios of Northern West Bengal, India: A Review. International Research Journal of Biological Sciences 2(7): 70–79. Available from: www.isca.in.
Martin DJ (1955) Features on Plant Cuticle. Transactions of the Botanical Society of Edinburgh 36: 278–288. https://doi.org/10.1080/13594865509441615
McKay GM (1973) Behaviour and ecology of the Asiatic elephant in southeastern Ceylon. Smithsonian Contributions to Zoology: 1–113. https://doi.org/10.5479/si.00810282.125
Mohapatra K, Patra A, Paramanik D (2013) Food and feeding behaviour of Asiatic elephant (Elephas maximus Linn.) in Kuldiha Wild Life Sanctuary, Odisha, India. Journal of Environmental Biology 34: 87–92.
Olson W, Zhang L, O’Connor DH, Kleinfeld D (2023) Elephant trunks: Strength and dexterity from mini-fascicles. Current Biology 33: R1203–R1205. https://doi.org/10.1016/j.cub.2023.10.012
Pareja J, Espunya C, Baraza E, Bartolomé J (2021) Complementarity between microhistological analysis and PCR-capillary electrophoresis in diet analysis of goats and cattle using faecal samples. Animal 15(3): 100145. https://doi.org/10.1016/j.animal.2020.100145
Poole JH, Granli P (2011) Signals, Gestures, and Behaviour of African Elephants. In: The Amboseli Elephants. University of Chicago Press, 109–124. https://doi.org/10.7208/chicago/9780226542263.003.0008
Pradhan NMB, Wegge P, Moe SR, Shrestha AK (2008) Feeding ecology of two endangered sympatric megaherbivores: Asian elephant Elephas maximus and greater one-horned rhinoceros Rhinoceros unicornis in lowland Nepal. Wildlife Biology 14: 147–154. https://doi.org/10.2981/0909-6396(2008)14[147:FEOTES]2.0.CO;2
Pringle R, Abraham J, Anderson T, Coverdale T, Davies A, Dutton C, Gaylard A, Goheen J, Holdo R, Hutchinson M, Kimuyu D, Long R, Subalusky A, Veldhuis M (2023) Impacts of large herbivores on terrestrial ecosystems. Current Biology 33(11): 584–610. https://doi.org/10.1016/j.cub.2023.04.024
Puri K, Yadav V, Joshi R (2019) Functional Role of Elephants in Maintaining Forest Ecosystem and Biodiversity: Lessons from Northwestern Elephant Range in India. Asian Journal of Environment & Ecology 9: 1–8. https://doi.org/10.9734/ajee/2019/v9i230091
Roy M (2010) Habitat use and foraging ecology of the Asian elephant (Elephas maximus) in Buxa Tiger Reserve and adjoining areas of the northern West Bengal. PhD thesis. Vidyasagar University, Paschim Medinipur, West Bengal, India, 112 pp.
Shoshani J (1998) Understanding proboscidean evolution: a formidable task. Trends in Ecology & Evolution 13: 480–487. https://doi.org/10.1016/S0169-5347(98)01491-8
Shrestha R, Wegge P (2006) Determining the Composition of Herbivore Diets in the Trans-Himalayan Rangelands: A Comparison of Field Methods. Rangeland Ecology & Management 59: 512–518. https://doi.org/10.2458/azu_jrm_v59i5_shrestha
Steinheim G, Wegge P, Fjellstad JI, Jnawali SR, Weladji RB (2005) Dry season diets and habitat use of sympatric Asian elephants (Elephas maximus) and greater one-horned rhinoceros (Rhinocerus unicornis) in Nepal. Journal of Zoology 265: 377–385. https://doi.org/10.1017/S0952836905006448
Sukumar R (1990) Ecology of the Asian elephant in southern India. II. Feeding habits and crop raiding patterns. Journal of Tropical Ecology 6: 33–53. https://doi.org/10.1017/S0266467400004004
Veselovská A, Smolko P, Kropil R (2021) A Key for the Microhistological Determination of Plant Fragments Consumed by Carpathian Forest Cervids. Forests 12: 1229. https://doi.org/10.3390/f12091229
Wyatt JR, Eltringham SK (1974) The daily activity of the elephant in the Rwenzori National Park, Uganda. African Journal of Ecology 12: 273–289. https://doi.org/10.1111/j.1365-2028.1974.tb01037.x
Yang J, Pitarch EP, Potratz J, Beck S, Abdel-Malek K (2006) Synthesis and analysis of a flexible elephant trunk robot. Advanced Robotics 20: 631–659. https://doi.org/10.1163/156855306777361631
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