A review of research on the distribution, ecology, behaviour, and conservation of the Slender Loris Loris lydekkerianus (Mammalia: Primates: Lorisidae) in India

Singh, Mewa; Singh, Mridula; Kumara, Honnavalli N.; Kumar, Shanthala; Gnanaoliu, Smitha D.; Sasi, R.

doi:10.11609/jott.7562.13.11.19540-19552

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…Existing natural trails were used as transects in the forests for the surveys following the best recommendations [4,5]. A survey was carried out using headlamps covered with red filters, as lorises are not disturbed by a red light compared to white light [6][7][8][9]. Vehicle surveys and foot transects were also adopted and followed depending on the access and topography of the terrain for the surveys [10,11].…”

Section: Methodsmentioning

confidence: 99%

Occurrence and Abundance of Grey Slender Loris (Loris lydekkerianus) in Tiruchirappalli District, Tamil Nadu, India

2024

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The Grey Slender Loris (Loris lydekkerianus) is listed as "Endangered" by the IUCN. Thus, assessing the status and distribution of the slender loris is critical for species conservation. The Tiruchirappalli district had 95 slender loris individuals, with an abundance of 0.51±0.54 per km. The investigation was conducted utilising nocturnal survey and transect procedures. The population of slender loris in the region is growing, which raises concerns about habitat disturbance, such as the conversion of natural habitat into real estate and farmland. The study further gives insights in human-slender loris conflict.

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Section: Methodsmentioning

confidence: 99%

Occurrence and Abundance of Grey Slender Loris (Loris lydekkerianus) in Tiruchirappalli District, Tamil Nadu, India

2024

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“…They belong to the family Lorisidae, which also includes slow lorises, pottos, and angwantibos. Slender lorises are confined to India and Sri Lanka, where they inhabit dry to moist and lowland to montane forests [2]. Slender lorises are characterized by their small size, long limbs, vestigial tail, large eyes, and slow locomotion.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Insights on the Delineation of Mysore and Malabar Subspecies of the Grey Slender Loris (<em>Loris lydekkerianus</em>) in Southern India

Teja¹,

Manu²,

Kumara³

et al. 2023

Preprint

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Phylogenetics is a powerful tool for understanding the evolutionary history of organisms and for informing conservation and management of species. Among the strepsirrhine primates, the slender lorises are a threatened genus of small, nocturnal animals confined to India and Sri Lanka. The grey slender loris (Loris lydekkerianus) is divided into several subspecies based on the morphological and geographical variation but not supported by molecular data. We investigated the genetic basis of taxonomic and biogeographic variation as well as the phylogenetic divergence of two subspecies of the grey slender loris in southern India: the Mysore slender loris (Loris lydekkerianus ssp. lydekkerianus) and the Malabar slender loris (Loris lydekkerianus ssp. malabaricus). We sequenced and assembled the whole mitochondrial genomes of three representative individuals from their distribution in southern India and compared them with publicly available mitogenomes of other lorises. We found that the two Indian subspecies vary by 2.09% in the COX1 and CYTB gene regions and form distinct monophyletic clades that diverged about 1.049 million years ago. Our results support the morphological classification of these two subspecies in southern India and have implications for their conservation and management in captivity and in the wild.

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“…They belong to the family Lorisidae, which also includes Slow lorises, Pottos, and Angwantibos. Slender lorises are confined to India and Sri Lanka, where they inhabit dry to moist and lowland to montane forests (Singh et al 2021). Slender lorises are characterized by their small size, long limbs, vestigial tail, large eyes, and slow locomotion.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic insights on the delineation of Mysore and Malabar subspecies of the Grey Slender Loris Loris lydekkerianus in southern India

Teja,

Manu,

Kumara

et al. 2023

J. Threat. Taxa

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Slender lorises are a threatened genus of small and nocturnal strepsirrhine primates confined to India and Sri Lanka. The Grey Slender Loris Loris lydekkerianus is divided into several subspecies based on morphological variation and geographical distribution but not supported by molecular data. We investigated the phylogenetic divergence of two subspecies of the Grey Slender Loris in southern India: the Mysore Slender Loris Loris lydekkerianus ssp. lydekkerianus and the Malabar Slender Loris Loris lydekkerianus ssp. malabaricus. We generated whole genome shotgun sequence data and assembled the whole mitochondrial genomes of representative individuals from their distribution in southern India and compared them with publicly available mitogenomes of other lorises. We found that the Mysore and Malabar Slender Lorises vary by 2.09% in the COX1 and CYTB gene regions. Further, phylogenetic analysis of 13 protein-coding and two ribosomal RNA genes in the mitochondrial genome showed that the Mysore and Malabar Slender Lorises form distinct monophyletic clades that diverged about 1.049 million years ago, shortly after the divergence of Red Slender Loris Loris tardigradus. Considering this relatively high sequence variation and evolutionary divergence together with their already established morphological differences and geographically distinct habitats, we propose to recognize the Mysore and Malabar Slender Lorises as two distinct species Loris lydekkerianus and Loris malabaricus.

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A review of research on the distribution, ecology, behaviour, and conservation of the Slender Loris Loris lydekkerianus (Mammalia: Primates: Lorisidae) in India

Cited by 3 publications

References 38 publications

Occurrence and Abundance of Grey Slender Loris (Loris lydekkerianus) in Tiruchirappalli District, Tamil Nadu, India

Occurrence and Abundance of Grey Slender Loris (Loris lydekkerianus) in Tiruchirappalli District, Tamil Nadu, India

Phylogenetic Insights on the Delineation of Mysore and Malabar Subspecies of the Grey Slender Loris (<em>Loris lydekkerianus</em>) in Southern India

Phylogenetic insights on the delineation of Mysore and Malabar subspecies of the Grey Slender Loris Loris lydekkerianus in southern India

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