Human activities that cut tiger gene flow in NE: tiger census report

Human activities that cut tiger gene flow in NE: tiger census report

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Guwahati: National tiger census report for 2018-19 estimates 219 tigers to be trimmed due to poor sampling in the Brahmaputra floodplain and northeastern hills landscape, but the process of human cutting the gene flow of big cats is red The flag is from the source of Kaziranga, which is important for conservation.
The report released on Tuesday by Union Environment Minister Prakash Javadekar stated, “Tiger occupancy was recorded within the Brahmaputra Valley and North East Hills landscapes with an estimated population of approximately 219 (194) from an area of ​​3,312 km of forests. 244) Tiger. Approximately 6,040.2 km of areas were not sampled in 2018, where tiger presence was reported in 2014. ”
The report states, “Camera trap-based mark-recapture and density estimates were obtained from tigers from eight locations in the landscape of the Brahmaputra floodplain and the northeast hills. The tiger population has shown a promising trend in the Brahmaputra floodplains. However, there has been a decrease in the tiger population in Nameri and Pakka blocks. ”
The report states that the Brahmaputra floodplains have high prey biomass and support high densities of tigers and Kaziranga populations, one of the largest source tiger populations in this landscape, the Orang Tiger Reserve on the West, Nameri and Pakke Tiger Is connected to the north through the island systems of the Brahmaputra.
The “river island or is chaporis” is an important and important habitat for maintaining gene flow between the plains and mountain populations (tigers in Arunachal Pradesh). However, these river islands are highly fertile for agriculture and pasture for livestock is a major obstacle for most animal movement. The population of Kaziranga has almost lost connectivity with the northern bank of the Brahmaputra, ”the report said.
The number of tigers in the Orang Tiger Reserve is also considerable. However, this population’s connectivity to Kaziranga in the south and Nameri-Pakka in the north is being disrupted due to increasing human settlements and ‘khutis’ (cattle farms).
The report suggested that Baksa (West Bengal) and Dampa (Mizoram) could be reopened through renegotiation of Kaziranga, “Baksa has a good hunting ground to stop poaching and strengthen conservation in Dumpa . ”
Kaziranga is also connected to the Karbi Anglong Hills in the south and Intak National Park (Nagaland) through some degraded forest areas. This connectivity to Karbi Anglong is important for the spread of tigers and other wildlife species that use these hills as a refuge during the Brahmaputra flood season.
“Unfortunately, during this survey, limited tigers in the Karbi Hills have not recorded any tiger marks,” the report said, suggesting that traffic on NH 37 passing through the southern border of Kaziranga National Park It is important to manage. So that infrastructure and urban sprawl do not become an obstacle for wildlife (especially megaherbivores) to visit the Karbi Anglong refuge. ”
“Mining in the Karbi-Anglong hills and stone quarries and stone quarries are also a concern and the Assam government has already been requested to ban mining in these sensitive areas,” the report said.
The report states, “Surveys and camera trapping, though limited, have not recorded any tiger signs in the intanki. This landscape has forest on the international border with Myanmar Wildlife Sanctuary in Myanmar. The weak links in this landscape are the forests of the districts of Mon, Mokok Chung, Tuensang, Xuheboto, Wokha and Pekh in the east. The landscape between Balpakharam National Park and Intak National Park is fragmented through the districts of Karbi-Anglong, West Khasi Hills, East Khasi Hills and East and West Garo Hills. The lack of a tiger signal in Karbi Anglong and Intak is a sign of deterioration of habitat contact possibly due to tiger poaching. ”


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