Road Kills between 9 / 6 and Chinnar Check posts and in Aliyar – Attakatti check posts, Anamalai Tiger Reserve, Tamilnadu
Highway that goes through forest bisects the habitat and pose severe problem for wildlife that crosses the road. Very often wild animals get killed by speeding vehicles. So a study was undertaken to look at the problem posed by state highways that go thorough Anamalai Tiger Reserve to suggest mitigation measures to reduce the number of road kills along these roads. The roads selected for the study were road stretch between 9 / 6 – Chinnar road and Aliyar – Attakatti check posts. The main objectives of this study were:
- to look at the road kills along 9 / 6 and Chinnar check post road and along Aliyar and Attakatti Check post road
- to look at the vehicle traffic during week days and week ends
- to look at the vehicle speed in day and night time as well in steep roads and in road stretch that goes through flat terrain
- and to suggest mitigation measures to reduce road kills
Methods
Two major highways that goes through Anamalai Tiger Reserve namely 9 / 6 Check post - Chinnar and Aliyar – Attakatti check post were selected to look at road kills of wild animals. The selected roads were walked during morning and all the animals that were found dead were noted with Global Positioning System (GPS) locations. Vehicles using theses roads during week days and week ends and during day and night time were recorded. Vehicles using these roads would be classified into heavy vehicle such as truck and bus and medium sizzled vehicle like Mazda’s and mini trucks, light motor vehicles such as car and jeeps and autos and two wheelers. Vehicle speed were recorded with the help of speed guns. Vehicle speed were recorded during day and night time and also in different terrains such as steep slopes and flat terrains.
Results
This work was started from December 2010 and it continued until April 2011. Both roads were walked twice during the month of December 2010 and the length of the roads walked were 20.2 in Aliyar – Attakatti road and 24 kilometers 9 / 6 Check post and Chinnar Check post road. 20 (twenty) kills were found along 9 / 6 check post and Chinnar road and 75 (seventy five) kills were found along the Aliyar – Attakatti Check post road. The kills includes amphibians, reptiles, birds and mammals. Invertebrates such as insects and crabs were also found along both roads. Several shield tail snakes were found dead during the first trip just after rains and it less number of shield tails were found dead during the second trip. Sheild tail snakes were found dead only in Aliyar – Attakatti check post road. The study roads were digitized using MapInfo Professional Version 10. The roads were digitized from 1: 50, 000 scale Survey of India Toposheets. Fifty meter contours were generated using Shuttle Radar Topographic Mission data (SRTM). Road kill locations were superimposed on the roads to look at whether there is any particular stretch has got more hills and also look at the number of kill along steep roads and roads running through flat terrain. More kills were found gentle undulating terrain and in road stretches in flat terrain. Twelve kill were noticed between Punganodai and 9 / 6 check post and fourteen kill were found between Aliyar and Attakatti check post road between contour canal junction and Aliyar check post. More number of kills were noticed between contour canal during first visit between contour canal junction and Attakatti check post this because of large number shield tails movement after rain in this stretch after rain.
Animal kills found in 9 / 6 and Chinnar Check post
SNo |
Species |
1 | White headed babbler |
2 | Rat |
3 | Butterfly |
4 | Common Indian toad |
5 | Cat Snake |
6 | vine snake |
7 | Porcupine |
8 | Centipede |
Animal kills found in Aliyar and Attakatti check post
SNo |
Species |
1 | Shield tail snake |
2 | Rat |
3 | Common toad |
4 | Cat Snake |
56 | Millipedecentipede |
7 | Shink |
89 | Calottes calottesCalottes versicolor |
10 | Tiplops snake |
11 | Salea |
12 | Green vine Snake |
13 | Moths and butterfly |
14151617 | CrabOrnate Flying SnakeChameleonPalm civet |
Proportion of different kills found along Aliyar – Attakatti Check posts
SNo |
Class |
Proportion (N=35) |
1 | Amphibians | 48.6 (17) |
2 | Reptiles | 45.7 (16) |
3 | Birds | — |
4 | Mammals | 5.7 (2) |
Proportion of different kills found along 9 / 6 and Chinnar Check posts
SNo |
Class |
Proportion (N=9) |
1 | Amphibians | 11 (1) |
2 | Reptiles | 55.6 (5) |
3 | Birds | 11 (1) |
4 | Mammals | 22 (2) |
Vehicle speed in flat terrain Aliyar – Attakatti Road and 9/6 Check post and Chinnar Road during the month of January 2011
SNo |
Type of Vehicle |
Aliyar – Attakatti Rd |
9/6 Check post and Chinnar Rd |
||
Percentage of Vehicle speed 40 & <40 KMPH | Percentage of Vehicle speed 40 & >40 KMPH | Percentage of Vehicle speed 40 & <40 KMPH | Percentage of Vehicle speed 40 & >40 KMPH | ||
1 |
Heavy |
15 (10) |
85 (57) |
45 (18) |
55 (22) |
2 |
Light Vehicle |
5 (7) |
95 (126) |
18 (37) |
72 (96) |
3 |
Medium Sized Vehicle |
15 (6) |
85 (34) |
44 (18) |
56 (23) |
Number of Vehicles using the study roads during week days in Aliyar Attakatti Rd
Time | Number of Heavy Vehicle | Number of Medium sized Vehicle | Number of Light Motor Vehicle | Number of Two Wheeler & Autos |
0600-0700 |
3 |
0 |
1 |
2 |
0700-0800 |
10 |
2 |
2 |
7 |
0800-0900 |
6 |
3 |
4 |
2 |
0900-1000 |
8 |
4 |
1 |
9 |
1000-1100 |
9 |
2 |
1 |
3 |
1100-1200 |
11 |
2 |
4 |
7 |
1200-1300 |
13 |
5 |
7 |
9 |
1300-1400 |
19 |
8 |
0 |
14 |
1400-1500 |
13 |
3 |
5 |
13 |
1500-1600 |
13 |
7 |
6 |
13 |
1600-1700 |
15 |
3 |
3 |
8 |
1700-1800 |
13 |
3 |
9 |
7 |
Total |
133 |
42 |
43 |
94 |
Number of Vehicles using the study roads during week days in Aliyar Attakatti Rd
Time | Number of Heavy Vehicle | Number of Medium sized Vehicle | Number of Light Motor Vehicle | Number of Two Wheeler & Autos |
0600-0700 |
3 |
2 |
2 |
1 |
0700-0800 |
12 |
4 |
9 |
8 |
0800-0900 |
13 |
3 |
13 |
17 |
0900-1000 |
14 |
2 |
16 |
19 |
1000-1100 |
25 |
2 |
16 |
16 |
1100-1200 |
29 |
10 |
11 |
38 |
1200-1300 |
33 |
5 |
14 |
18 |
1300-1400 |
22 |
5 |
9 |
18 |
1400-1500 |
21 |
6 |
10 |
34 |
1500-1600 |
38 |
8 |
16 |
25 |
1600-1700 |
25 |
6 |
11 |
43 |
1700-1800 |
29 |
5 |
10 |
30 |
Total |
261 |
56 |
135 |
266 |
- Wild India | Ecology of Striped Hyena - 14 August,2012
- Road Kills in Chinnar Road and Aliyar - 28 April,2012
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