Mortality Census of the Road-Killed Butterflies in Mahendra Highway, Nepal

Gaudel, Prakash; Paudel, Manisha; Gaudel, Prabin; Giri, Bal Ram; Shrestha, Bimal Raj

doi:10.52547/jibs.6.1.87

Mortality Census of the Road-Killed Butterflies in Mahendra Highway, Nepal

Document Type : Original Research

Authors

Prakash Gaudel ¹

Manisha Paudel ²

Prabin Gaudel ³

Bal Ram Giri ⁴

Bimal Raj Shrestha ⁵

¹ Central Department of Zoology, Tribhuvan University, Kathmandu, Nepal

² Research Institute for the Environment and Livelihoods, Charles Darwin University, Northern Territory, Australia

³ Institute of Agricultural and Animal Science, Paklihawa Campus, Rupandehi, Nepal

⁴ Department of Zoology, Amrit Science Campus, Tribhuvan University, Kathmandu, Nepal

⁵ Biodiversity Research and Conservation Society, Kathmandu, Nepal

10.52547/jibs.6.1.87

Abstract

Increasing roads become the serious conservation threats to the animal populations. The most direct effect of roads on them is deadly collision with vehicles, leading to high levels of injury or death. Estimates of detectability of road-killed higher vertebrates have been determined but not for the invertebrates like butterflies, although they are frequently killed insects group on roads. This is the first comprehensive mortality census of road-killed butterflies in Nepal. The main aim of this study was to estimate the detectability of road-killed butterflies in Mahendra Highway, the busiest highway in Nepal. We established eight transects, each of 500 m long within the randomly selected forest and human settlement landscapes. Pearson’s correlation was calculated to test the link between the number of road-killed and living butterflies. All together 1000 butterfly individuals were counted throughout the study periods including road-killed and living butterflies. Among them, 364 butterflies were counted raodkilled whereas 636 butterflies were living. Forest landscape contributed higher number in both road-killed and living butterflies than human settlement landscape. Also, the number of butterflies killed on the roads were significantly correlated with number of living butterflies on the road. Our results indicate that road has the significant impact on loss of butterfly population. Also, higher the number of living butterflies more will be road mortality. The public awareness and maintaining the habitats with high forbs cover, gardening, avoid depositing asphalts, etc. in the vicinity of road can denigrate the rate of road mortality of butterflies.

Graphical Abstract

Mortality Census of the Road-Killed Butterflies in Mahendra Highway, Nepal

Keywords

Devdaha Municipality

Nepal

Roads

Butterfly

Conservation

20.1001.1.24238112.2020.6.1.2.5

Bernardino, F.S. & Dalrymple, G.H. (1992) Seasonal activity and road mortality of the snakes of the Pahayokee wetlands of Everglades National Park, USA. Biological Conservation, 62, 71-75. https://doi.org/10.1016/0006-3207(92)90928
Canfield, P.J. (1991) A survey of koala road kills in New South Wales. Journal of Wildlife Disease, 27(4), 657- 660.
Davies, J.M., Roper, T.J. & Shepherdson, D.J. (1987) Seasonal distribution of road kills in the European badger (Meles meles). Journal of Zoology, 211, 525-529.
Dennis, R.L.H. (1986) Motorways and cross-movement an insect’s ‘mental map’ of the M56 in Cheshire. Bulletin of the Amateur Entomologists’ society, 45, 228-243.
Fahrig, L., Pedlar, J.H., Pope, S., Taylor, P.D. & Wegner, J.F. (1995) Effect of road traffic on amphibian density. Biological Conservation 73, 77-182. https://doi.org/10.1016/0006-3207(94)00102
Fjellstad, W.J. (1998) The landscape ecology of butterflies in traditionally managed Norwegian farmland. PhD Thesis, University of Durham.
Holbrook, H.T. & Vaughan, M.R. (1985) Influence of roads on turkey mortality. Journal of Wildlife Management, 49, 611-614. https://www.jstor.org/stable/3801681
Husby, M. (2016) Factors affecting road mortality in birds. Ornis Fennica, 93, 212-224.
Jackson, N.D. & Fahrig, L. 2011 Relative effect of road mortality and decrease connectivity on population genetic diversity. Biological Conservation, 144, 3143-3148. https://doi.org/10.1016/j.biocon.2011.09.010 Kalarus, K. & Bakowski, M. (2015) Railway tracks can have great value for butterflies as a new alternative habitat. Italian Journal of Zoology, 82(4), 565-572. https://doi.org/10.1080/11250003.2015.1078417
Keller, I., Nentwig, W. & Largiade`r, C.R. (2004) Recent habitat fragmentation due to roads can lead to significant genetic differentiation in an abundant flightless ground beetle. Molecular Ecology, 13, 2983–2994. https://doi.org/10.1111/j.1365-294X.2004.02310
Khanal, B. (2008) Diversity and status of butterflies in lowland districts west Nepal. Journal of Natural History Museum, 23, 92-97.
Khanal, B., Chalise, M.K. & Solanki, G.S. (2012) Diversity of butterflies with respect to altitudinal rise at various pockets of the Langtang National Park, central Nepal. International Multidisciplinary Research Journal, 2(2), 41-48.
Khyade, B.V., Gaikwad, P.M. and Vare, P.R. (2018) Explanation of Nymphalidae Butterflies. International Academic Journal of Science and Engineering, 5(4), 24-47.
Lalo, J. (1987) The problem of road kill. American Forests, 93, 50-52. http://agris.fao.org/agris-search/search.do?recordID=US880240088
Laurance, W.F., Goosem, M. & Lauranc, S.G.W. (2009) Impacts of roads and linear clearings on tropical forests. Trends in Ecology and Evolution, 12,659–669. https://doi.org/10.1016/j.tree.2009.06.009
Mckenna, D.D., Mckenna, K.M., Malcom, S.B. & Berenbaum, M.R. (2001) Mortality of Lepidoptera along roadways in central Illinois. Journal of the Lepidopteras' Society, 55(2), 63-68.
Mech, L.D. (1989) Wolf population survival in an area of high road density. The American Midland Naturalists, 121(2), 387-389. https://pubs.er.usgs.gov/publication/5222245
Nowicki, P., Settele, J., Henry, P.K., & Woyciechowsk, M. (2008) Butterfly monitoring methods: the ideal and the real world. Israel Journal of Ecology & Evolution, 54, 69-88.
Öckinger, E., Bergman, K.O., Franze̍n, M., Kadlec, T., Krauss, J., Kuussaari, M., Pöyry, J., Smith, H., Steffan-Dewenter I. & Bommarco, R. (2012) The landscape matrix modifies the effect of habitats fragmentation in grassland butterflies. Landscape Ecology, 27, 1221-131.
Pollard, E. (1977) A method for assessing changes in the abundance f butterflies. Biological Conservation, 12, 115-134.
Pollard, E. (1982) Monitoring butterfly abundance in relation to the management of a nature reserve. Biological Conservation, 24, 317-328.
Putman, R.J. (1997), Deer and road trafflc accidents: options for management. Journal of Environmental Management, 51, 43-57.
Rao, R.S.P. & Girish, M.K.S. (2007) Roadkills: Assessing insect casualties using flagship taxon. Current Science, 92, 830-837.
Ries, L., Debinski, D.M. & Wieland, M.L. (2001) Conservation values of road sides prairie restoration of butterfly communities. Conservation Biology, 15, 401-411. https://doi.org/10.1046/j.1523-1739.2001.015002401
Riley, S.P.D., Pollinger, J.P., Sauvajot, R.M., York, E.C., Bromley, C., Fuller, T.D. & Wayne, R.K. (2006) A southern California freeway is a physical and social barrier to gene flow in carnivores. Molecular Ecology, 15, 1733–1741.
Rosin, Z.M., Skórka, P., Lenda, M., Moron, D., Sparks, T.H. and Tryjanowski, P. (2011) Increasing patch area, proximity of human settlement and larval food plants positively affect the occurrence and local population size of the habitat specialist butterfly Polyommatus coridon (Lepidotera: Lycaenidae) in fragmented calcareous grassland. European Journal of Entomology, 108, 99-106.
Saarinen, K., Valtonen, A., Jantunen, J., & Saarnio, S. (2005) Butterﬂies and diurnal moths along road verges: Does road type affect diversity and abundance? Biological Conservation, 123, 403– 412. http://dx.doi.org/10.1016%2Fj.biocon.2004.12.012
Saraf, K.K. & Jadash, M. (2017) A preliminary study on road killed butterflies at National Highway- 50, Kalaburagi district, Karnataka, India. International Journal of Entomology Research, 2(1), 42-50.
Selva, N., Kreft, S., Kati, V., Schluck, M. Jonsson, B.G., Mihok, B., Okarma, H. & Ibisch, P.I. (2011) Roadless and low traffic areas as conservation target in Europe. Environmental Management, 48, 865-877.
Shrestha B.R., Sharma, M., Magar, K.T., Gaudel, P., Gurung, M.B and Oli, B. (2018) Diversity and status of butterflies at different sacred forests of Kathmandu valley, Nepal. Journal of Entomology and Zoology Studies, 6(3), 1348-1356.
Skórka, P. (2016) The detectability and persistence of road-killed butterflies: An experimental study. Biological Conservation, 200, 36-43. https://doi.org/10.1016/j.biocon.2016.05.026
Skórka, P., Lenda, M. & Moron, D. et al. (2018) Roads affect the spatial structure of butterfly communities in grassland patches. Peer Journal, 6:e5413; DOI 10.7717/peerj.5413
Skórka, P., Lenda, M., Moron, D., Kalarus, K. & Tryjanowski, P. (2013) Factors affecting road mortality and the suitability of road verges for butterflies. Biological Conservation, 159, 148–157. http://dx.doi.org/10.1016/j.biocon.2012.12.028
Skórka, P., Lenda, M., Moron, D., Martyka, R., Tryjanowski, P. & Sutherland, W.J. (2015) Biodiversity Collision blackspots in Poland: Saparation Causality from Stochasticity in roadkills of butterflies. Biological Conservation, 187, 153-168. https://doi.org/10.1016/j.biocon.2015.04.017
Smith, C. (1977) Some butterflies of western Nepal. Jouranl of Natural History Museum, 1(4), 143-150
Smith, C. (1997) Butterflies of Royal Chitwan National Park Nepal, Tecpress Books, Bangkok, Thailand. 80 pp.
Smith, C. (2011a) Butterflies of Annapurna Conservation Area. Sigma General Offset Press, Lalitpur, Nepal, 154 pp.
Smith, C. (2011b) Butterflies of Nepal. Himalayan House Publication, Kathmandu, Nepal. 144 pp.
Soluk, D.A., Zercher, D.S. &Worthington, A.M. (2011), Influence of roads on patterns of mortality and flight behavior of adult dragonflies near wetland areas. Biological Conservation, 144, 1638-1643.
Sony R.K. & Arun, P.R. (2015) A case study of butterfly road kills from Anaikatty Hills, Western Ghats, Tamil Nadu, India. Journal of Threatened Taxa, 7(14), 8154-8158. https://doi.org/10.11609/jott.1743.7.14.8154-8158
Vadivalagan, C., Gunasekaran, C. & Salahudeen, I. (2012) Molecular phylogeny of recurrent road killed butterflies in Nilgiri biosphere reserve, India, using CO1 gene marker. African Journal of Biotechnology, 11(79), 14433-14439.
Yamada, Y., Sasaki, H. & H. Yutaka (2010) Composition of road-killed insects on coastal roads around Lake Shiktosu in Hokkaido, Japan. Journal of Rakuno Gakuen University, 34(2), 177-184.