STRUKTUR POPULASI BEKANTAN (NASALIS LARVATUS)  DI RAWA GELAM

Reni Srimulyaningsih; Maiser Syaputra

doi:10.29303/jbl.v4i1.519

STRUKTUR POPULASI BEKANTAN (NASALIS LARVATUS) DI RAWA GELAM

Jurnal Belantara ◽

10.29303/jbl.v4i1.519 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Reni Srimulyaningsih ◽

Maiser Syaputra

Keyword(s):

Slow Growth ◽

Proboscis Monkey ◽

Swamp Forest ◽

Nasalis Larvatus

Number of proboscis monkey population in Cajuputi Swamp Forest is 258 individual. This population is strongly influenced by condition of its habitat which is to degradation to 3.417 hektar. The object of research is to analyzed structure of proboscis monkey population. Method of research are river survey (Sha et al, 2008) and concentration count (Anonymous, 1981; Alikodra, 2002). The avarage density of proboscis monkey in their homerange is 3 individuals/hectares, with 30,2% males and 48,5 % females. This population is slow growth because there is only one baby/year, this is also indicated by number of 14 individuals babies (5,4%) and 41 infant (15,9%) lower when compared to number of adult indiviuals, so it is very worryng for continued growth of the population.

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POPULASI BEKANTAN (Nasalis larvatus) DI KAWASAN HUTAN MANGROVE SUNGAI SETINGGA ASIN DESA SEBUBUS KECAMATAN PALOH KABUPATEN SAMBAS

JURNAL HUTAN LESTARI ◽

10.26418/jhl.v7i3.37559 ◽

2019 ◽

Vol 7 (3) ◽

Author(s):

Ayu Dewi Puspitasari ◽

Erianto Erianto ◽

Slamet Rifanjani

Keyword(s):

Mangrove Forest ◽

Animal Species ◽

Survey Method ◽

Mangrove Forests ◽

Proboscis Monkey ◽

Coastal Forests ◽

Swamp Forest ◽

Nasalis Larvatus ◽

The Government ◽

Group Density

Bekantan or Proboscis Monkey (Nasalis larvatus) is a herbivorous primate that occupies riparian areas, mangrove forests and coastal forests in Kalimantan. This species is an endemic primate on Kalimantan Island which has been declared as one of the protected species by the Government of Indonesia based on the Minister of Environment and Forestry Regulation number P.106 of 2018 concerning protected plant and animal species. Bekantan's main habitat in the form of mangrove swamp forest areas has now been opened due to human activities so that habitats suitable for the life of the proboscis monkey are reduced. This research was conducted in the mangrove forest of Sebubus Village, Paloh Subdistrict, Sambas Regency for 2 weeks effectively in the field to observe and count the number of Bekantan. Starting from September 16, 2018 until completion. This study aims to record the estimated population of Bekantan (Nasalis larvatus) in the mangrove forest area of Sungai Setingga Asin Sebubus Village, Paloh District, Sambas Regency. The research method used is the river survey method. Bekantan population calculation is done by the King method. Based on observations with 6 replications morning and evening. The area of the study area of 14.91 ha showed that there were 35.8 individuals and 1 group of proboscis monkey with a population density of 1.2 individual probes / ha and a group density of 0.03 groups / ha of proboscis.Keyword : mangrove forest Sebubus, proboscis monkey, river survey

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Habitat suitability of Proboscis monkey (Nasalis larvatus) in Berau Delta, East Kalimantan, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d211121 ◽

2020 ◽

Vol 21 (11) ◽

Author(s):

Tri Atmoko ◽

Ani Mardiastuti ◽

Muhammad Bismark ◽

Lilik Budi Prasetyo ◽

Entang Iskandar

Keyword(s):

Habitat Suitability ◽

Model Performance ◽

Area Under The Curve ◽

Suitable Habitat ◽

Proboscis Monkey ◽

Environmental Predictors ◽

Swamp Forest ◽

Nasalis Larvatus ◽

East Kalimantan ◽

Habitat Suitability Map

The proboscis monkey (Nasalis larvatus) is an endemic species to Borneos’ island and is largely confined to mangrove, riverine, and swamp forest. Most of their habitat is outside the conservation due to degraded and habitat converted. Habitat loss is a significant threat to a decreased in the monkey's population. Berau Delta is an unprotected habitat of proboscis monkey, lacking in attention and experiencing a lot of disturbances. This study was conducted on April – August 2019; with aims of the study is to determine Species Distribution Modeling (SDM) for identifying proboscis monkey habitat suitability in Delta Berau, East Kalimantan. The MaxEnt algorithm was used to produce a habitat suitability map based on this species’ occurrence records and environmental predictors. We built the models using 208 points of proboscis monkey presence and 12 environment variables within the study area. Model performance was assessed by examining the area under the curve. The variables most influencing the habitat suitability model were the riverine habitat (60.9%), distance from the pond (16.0%), and distance from the coastline (5.2%). The proboscis monkey suitable habitat is only 9.32% (8,726.58 ha) from 93,631.41 ha total area. The appropriate habitat areas are Sapinang Island, Bungkung Island, Sambuayan Island, Saodang Kecil Island, Besing Island, Lati River, Bebanir Lama, Batu-Batu, and Semanting Bay. We provide some suggestions for the proboscis monkey conservation, which are local protection of uninhabited islands, participatory ecotourism management, and company involvement in protection and management efforts.

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