TABLE 1 Data on primate species in India, including the conservation status according to the IUCN Red List (IUCN, 2021) and the Wild Life (Protection) Act (WLPA; numerals denote schedule types under theWLPA, with lower values representing a higher protection status), the number of population studies published during 2000–2021, study site protection (PA, protected areas;NPA, non-protected areas), survey methods used, study location, main direct threats faced, local population trend (as reported in the studies) and the global population trend (according to the IUCN Red List). The numbers in parentheses indicate the number of reports. Species for which we did not find any studies are marked with asterisks (*); data on the direct threats and global population trend for these species were taken from the IUCN Red List.
Conservation status
Species
Lorises Grey slender loris* Loris lydekkerianus grandis
Bengal slow loris Nycticebus bengalensis
Langurs Kashmir gray langur Semnopithecus ajax
Northern plains gray langur
Semnopithecus entellus
Tarai gray langur* Semnopithecus hector
Black-footed gray lan- gur Semnopithecus hypoleucos
Tufted gray langur Semnopithecus priam
Nepal gray langur* Semnopithecus schistaceus
Nilgiri langur* Semnopithecus johnii
Capped langur Trachypithecus pileatus
NT II LC II NT II LC II VU I VU I IUCN WLPA EN I EN I
EN II LC II
No. of studies Study location (State)
0 1 n/a Assam
2 Himachal Pradesh (1); Jammu and Kashmir (1)
0 1 1 0 0 5
4 Maharashtra (1); Odisha (1); Rajasthan (1); Karnataka (1) n/a
Karnataka (1) Tamil Nadu (1) n/a n/a
Arunachal Pradesh (1); Assam (3); Assam, Arunachal Pradesh, Meghalaya, Manipur, Mizoram, Nagaland & Tripura (1)
Protection status of the study site(s)
n/a PA (1)
PA(1); both PA & NPA (1)
PA (1); NPA (2); both PA & NPA (1)
n/a PA (1) PA (1) n/a n/a
PA (4); NPA (1)
Methods used n/a All count (1)
Line transects (1); distance sampling (1)
All count (1); line transects (3)
n/a
Main direct threats [IUCN threat code]
Residential & commercial development [1]; agricul- ture & aquaculture [2]
Natural system modifications [7]
Natural system modifications [7]
Natural system modifica- tions [7]; biological resource use [5]
Residential & commercial development [1]; agriculture & aquaculture [2]
Line transects (1) Natural system modifications [7]
All count (1) n/a n/a
Line transects & all count (1); all count (1); line transects (1); random sampling (1); various (1)
Natural system modifications [7]
Residential & commercial development [1]; agricul- ture & aquaculture [2]
Residential & commercial development [1]; agricul- ture & aquaculture [2]
Natural system modifica- tions [7]; biological resource use [5]
Local popula- tion trend
n/a
Global popu- lation trend
Declining Declining (1) Declining Stable (2)
Stable (2); declining (1); increasing (1)
n/a
Declining Declining
Declining Increasing (1) Declining Stable (1) n/a n/a Declining Declining Stable Declining (5) Declining
170 S. Hameed et al.
Oryx, 2024, 58(2), 167–178 © The Author(s), 2023. Published by Cambridge University Press on behalf of Fauna & Flora International doi:10.1017/S0030605323000716
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