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Hoolock hoolock | Red List of Bangladesh Volume 2: Mammals

Publication
Red List of Bangladesh Volume 2: Mammals
NRL Record ID
327677
Location
Countries in Assessment
Bangladesh
Country ISO code(s)
BGD
Does the assessment cover a marine EEZ area(s)?
Off
Scope (Assessment)
National
Taxon
RRL Synonyms
Simia golock (Bechstein, 1795); Hylobates fuscus (Wilson Lewis, 1834); Simia hoolock (Harlan, 1834); Bunopithecus hoolock hoolock (Harlan, 1834); Hylobates choromandus (Ogilby, 1837); Hylobates scyritus (Ogilby, 1840); Hylobates hoolock (Blanford, 1881-18
Taxonomic Group
Vertebrates
Taxonomic Group Level 2
Mammals
Assessed taxon level
Species
Taxonomic Notes
This taxon is now considered monotypic; it was formerly considered conspecific with Hoolock leuconedys. The previous generic name, Bunopithecus, was changed by Mootnick and Groves (2005) to Hoolock (Haimoff et al. 1984) (Brockelman et al. 2008).
Taxon distribution as listed in assessment
Bangladesh, India and Myanmar (Brockelman et al. 2008). It lives in the mixed evergreen forests of northeast and southeast of Bangladesh (Ahsan 1994, Khan 1982, 2015).
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
Hoolock Gibbon inhabits tropical mixed evergreen forests of the northeast and southeast of the country. It is an arboreal, brachiator, monogamous and territorial species but come down to cross a stretch of land when tree canopies are discontinuous. The family group may comprise of adult male and female with their offsprings. Hoolock gibbon is mainly frugivorous but its diet also comprise of leaves, flowers and twigs (Ahsan 1994, Feeroz 1991, Feeroz and Islam 1992, Khan 1985, 1987b).
Is there a map available in assessment?
Yes, in the publication/on website
Assessed status
Asessment status in full
Critically Endangered
Assessment status abreviation
CR
Assessment rationale/justification
Population reduction observed around 90% over the last two decades. Both Extent of Occurrence and Area of Occupancy have been reduced during this period. Total number of mature individual is <250 and number of mature individuals in each subpopulation is <50. Population viability assessment (PHVA) estimated 95% reduction of existing population by next two decades. All these occur in severely disjunct habitats having very little or no chance of genetic exchanges between two or more populations. So, this Hoolock Gibbon is assessed as Critically Endangered.
About the assessment
Assessment year
2015
Assessors/contributors/reviewers listed
Mohammed Mostafa Feeroz, Md. Kamrul Hasan, Md. Farid Ahsan
Affliation of assessor(s)/contributors/reviewers listed on assessment
NGO
Academic
Assessor affiliation specific
Academic|NGO
Criteria system
Criteria system specifics
IUCN v3.1 + Regional Guidelines v4.0
Criteria system used
IUCN
Criteria Citation
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp; IUCN (2012) Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
URL (link) of redlist assessment or publication
http://iucnredlistbd.org/
Endemism
Endemic to region
No
Endemism Notes
Is an endemic?: No
Conservation
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Further information
History
Critically Endangered in Bangladesh (IUCN Bangladesh 2000).