Home Range, Activity Budgets and Habitat Use in the Bengal Slow Loris (<i>Nycticebus bengalensis</i>) in Bangladesh

Al-Razi, Hassan; Hasan, Sabit; Ahmed, Tanvir; Muzaffar, Sabir Bin

doi:10.1017/9781108676526.019

Cited by 8 publications

(7 citation statements)

References 1,036 publications

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“…The amount of feeding and foraging was even higher in the gum enrichment conditions (40-55%) than in the natural habitats, suggesting that gum consumption is particularly needed in captive animals. Travelling time is also similar between individuals in natural diet conditions and individuals in natural habitat (25-35% of activity; Al-Razi et al, 2020;Das and Nekaris, 2020), while animals in baseline conditions spent much more time travelling (~50%). Having similar activity patterns as a consequence of environmental enrichment including improved substrates and diet might bring benefits on the psychology and welfare of captive animals as showed by previous work (Mellen and MacPhee, 2001).…”

Section: Discussionmentioning

confidence: 81%

“…Studied slow lorises engaged in foraging and feeding behaviours in natural diet conditions more than the baseline conditions. Insect enrichment produced behaviour similar to slow lorises in their natural habitats, where feeding and foraging behaviours comprise more than 20-30% of activity (Rode-Margono et al, 2014;Reinhardt et al, 2016;Al-Razi et al, 2020;Das and Nekaris, 2020). The amount of feeding and foraging was even higher in the gum enrichment conditions (40-55%) than in the natural habitats, suggesting that gum consumption is particularly needed in captive animals.…”

Section: Discussionmentioning

confidence: 99%

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Naturalising diet to reduce stereotypic behaviours in slow lorises rescued from wildlife trade

Chatpongcharoen

Campera

Laithong³

et al. 2021

Applied Animal Behaviour Science

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Naturalising diet to reduce stereotypic behaviours in slow lorises rescued from wildlife trade

Chatpongcharoen

Campera

Laithong³

et al. 2021

Applied Animal Behaviour Science

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“…The annual temperature range is 9 to 32 °C, and nearly 80% of the annual average rainfall (3334 mm) occurs between May and October (Quazi and Tamara 2016 ). The forests of northeast Bangladesh harbour many globally threatened amphibians, reptiles, birds and mammals (Al-Razi et al 2019 , 2020 ; Zakir et al 2020 ; Rahman et al 2021 ). Among the ten primate species of Bangladesh, seven are found in the forest patches of the northeastern region (Al-Razi et al 2019 , 2020 ).…”

Section: Methodsmentioning

confidence: 99%

Mixed-species association and a record of a hybrid offspring between Trachypithecus pileatus and Trachypithecus phayrei in Bangladesh

Al-Razi¹,

Sattar

Maria

et al. 2022

Primates

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The term mixed-species association has a broad range of definitions, from temporary foraging association to permanent group living. A mixed-species association mostly involves species from closely related taxa and is found in birds, mammals and fish. It ranges from passive association with little interaction to coordinated behavioural interactions between the group members of a mixed-species group. Mixed-species association can result in the production of hybrid offspring in the wild. In this study, we present, to the best of our knowledge, the first observational evidence of mixed-species association between the two threatened primate species Phayre’s langur (Trachypithecus pileatus) and capped langur (Trachypithecus phayrei), in fragmented forest patches of northeast Bangladesh. We also report a presumed hybrid offspring between these species. We conducted a short-term study from December 2021 to April 2022 in three forest patches based on information from eco-tourism guides. We confirmed the presence of three mixed-species troops; in two of the groups an adult male T. phayrei had permanently immigrated into a group of T. pileatus, and in the other one an adult male T. pileatus had permanently immigrated into a group of T. phayrei. A long-term detailed study is needed to elucidate the reasons for these mixed-species associations, their behavioural patterns, the fate of the presumed hybrid offspring, and to understand the genetic relatedness between the individuals.

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“…We designated this transect as 'forest edge'. During each survey night, one of four transects ( Figure 1) were walked at 1.5 km/h and the canopy was searched using a 150 lumen light with a red filter [47,48]. Once a mammal was observed, its position was recorded using a GPS (Garmin eTrex 10), along with the tree species on which it was found.…”

Section: Encounter Datamentioning

confidence: 99%

Density of Nocturnal Mammals in a Forest Patch in Bangladesh

Al-Razi¹,

Hasan²,

Ahmed³

et al. 2020

Preprint

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Tropical forests harbor complex communities that are linked together by biotic relationships. Asian forests in particular have lost many apex predators due to habitat loss. We studied a small forest patch in northeastern Bangladesh, Satchari National Park, to determine density and diversity of nocturnal mammals and evaluate their relationships. Transects were walked from February 2015 to July 2016 and density was estimated using distance sampling. Nine species of mammals (5 arboreal and 4 ground-dwelling) were encountered. Densities of the common palm civets, Paradoxurus hermaphrodites, Bengal slow loris, Nycticebus bengalensis, were the highest (19.48 and 15.03 individuals/km2). Density of small Indian civets, large Indian civets and Indian mongoose were lower (2.31-5.55 individuals/km2). Unexpectedly, a wide range of nocturnal mammals co-existed in this forest patch, in spite of fragmentation and severe disturbance. We did not find any significant association between any of the species studied, although this could be an artifact of low sample size. Conservation in Bangladesh remains a challenge due to high human population density. Thus, strict conservation measures are needed to permit the long-term survival of these species.

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Home Range, Activity Budgets and Habitat Use in the Bengal Slow Loris (Nycticebus bengalensis) in Bangladesh

Cited by 8 publications

References 1,036 publications

Naturalising diet to reduce stereotypic behaviours in slow lorises rescued from wildlife trade

Naturalising diet to reduce stereotypic behaviours in slow lorises rescued from wildlife trade

Mixed-species association and a record of a hybrid offspring between Trachypithecus pileatus and Trachypithecus phayrei in Bangladesh

Density of Nocturnal Mammals in a Forest Patch in Bangladesh

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