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Saroyo Sumarto
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Agriculture, Biological Sciences & Forestry

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POTENSI TUMBUHAN PAKAN ALAMI bagi MONYET HITAM SULAWESI (Macaca nigra) di HUTAN LINDUNG GUNUNG MASARANG Rivo F. Rahasia; Johny S. Tasirin; Martina A. Langi; Saroyo Sumarto
COCOS Vol. 4 No. 5 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v4i5.4692

Abstract

ABSTRACT Mount Masarang Forest Reserve covers an area of 158,48 ha and is part of the natural habitat of the Sulawesi crested black macaque based on the geography and the forest. A population of Sulawesi crested black macaques may thrive here through introduction and migration from nearby populations. This research is aimed to study the potential of natural food plants of the Sulawesi crested black macaque (Macaca nigra) in Mount Masarang Forest Reserve. This research was done from March to April 2013 in Mount Masarang Forest Reserve, Tomohon City. Data was collected using multiple stage random sampling method. From 131 species plants in Mount Masarang Forest Reserve, found 7 species plants naturally eaten by Sulawesi crested black macaques, with varying population densities and role in the community. The species are Alstonia scholaris (5.944 individuals), Piper aduncum (5.225 individuals), Euodia minahassae (3.220 individuals), Trema orientalis (1.486 individuals), Koordersiodendron pinnatum (991 individuals), Caryota mitis (743 individuals) dan Dendrocnide microstigma (495 individuals). The highest distribution of food plants can be found on the eastern slopes, because 42% of the food plants on Mount Masarang Forest Reserve are found on these slopes.Keywords: Macaca nigra, Mount Masarang Forest Reserve, potential of natural food plants
DENSITAS TUMPARA (Tarsius tumpara) PADA HUTAN LINDUNG DAN HUTAN PRODUKSI DI PULAU SIAU SULAWESI UTARA Bryan M. Kuheba; Jhony S. Tasirin; Maria Y. M. A. Sumakud; Saroyo Sumarto
COCOS Vol. 6 No. 5 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i5.7573

Abstract

ABSTRACT The purpose of this study is to evaluate tumpara’s population and compare its density in each production forest and protected forests at Mount Tamata Siau Island. This study was conducted for one month in March 2014 at 7 plots in each forest type. Tumpara’s density and frequency was performed using sampling method and analized using descriptive statistics. Sightings density and frequency between production forests and protected forests then compared. Area description uses Importance Value Index (IVI). Correlation and simple regression analysis is used to see the relationship between vegetation and tumpara’s sightings frequency. Total basal area of the plots and shrub cover is used to evaluate tumpara’s sightings frequency. The results showed that the protected forest has tumpara density of 3.29 individuals/ha and 0.86 groups/ha while production forests has tumpara density of 2.14 individuals/ha and 0.47 groups/ha. Discovery frequency of tumpara in protected forest is 1.64 (0.02 to 3.26) times/day and the production forest has discovery frequency of 1.07 (0.21 to 1.93) times/day. There is a relation between vegetation cover and tumpara’s presence. The more area shrub covers, the higher tumpara population will be. Tumpara is more commonly seen in habitats dominated by Pandanus sp. Tumpara couldn’t be found in Myrstica fragrans dominated habitats.Keywords: Density, Sightings Frequency, Habitat, Tarsius tumpara, Siau Island
KARAKTERISTIK HABITAT DI SARANG TANGKASI (Tarsius Spectrumgurskyae) DI TAMAN HUTAN RAYA GUNUNG TUMPA H.V. WORANG, SULAWESI UTARA Sahdin Sapsuha; Johny S. Tasirin; Saroyo Sumarto
COCOS Vol. 13 No. 4 (2021): EDISI OKTOBER-DESEMBER 2021
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.35389

Abstract

ABSTRAK This study aims to determine th characteristics of the habitat in the nest of Tangkasi (Tarsius spectrumgurskyae) in the Gunung Tumpa Forest Park HV Worang. The research was carried out from October to November 2020. In collecting the tangkasi nest data, the observations were divided into three stages, namely: 1. Determination of nests. 2. Observation of nest characteristics and 3. Observation of the condition of the nest environment. This observation was carried out in the afternoon until the evening, namely at 16-30 - 18-30 and at dawn, namely at 04-30-06:00 WITA. The results of the study have obtained the location of the coordinates of the tangkasi nests as many as 8 nests spread over several types of land cover in the Tahura area of Gunung Tumpa HV Worang. The types of nest plants that make up Tarsius spectrumgurskyae are found in the Ficus and Arenga genera. The nest structure consists of cavities in the interweaving of roots and piles of interwoven fibers between the leaf midribs and found 1-6 individual tangkassi in each nest. Tangkasi nests are foundat an elevation of 462-574 m with a slope of 11% - 25%. Environmental conditions around the nest with light intensity 351.6 ± 39.71 lx, light percentage 19.9% ± 1.94%. The morning, afternoon and evening temperatures were 25.74ºC ± 0.42, 30.88 88C ± 0.47 and 25.79 C ± 0.35 with humidity in the morning, afternoon and evening 91.71% ± 2.54%, 77.48% ± 2.80% and 74.31% ± 19.4%. The vegetation of the nest habitat was dominated by Spathodea campanulata (INP 51.32%) for trees, Leucosyke capitellata (INP 27.99%) for poles and calamus sp. (INP 31.68%) for saplings. Keywords: Tangkasi, habitat characteristics, Tangkasi nest, Tahura Gunung Tumpa H.V Worang
Co-Authors Bryan M. Kuheba Maria Y.M.A. Sumakud Martina A. Langi Rivo F. Rahasia Sahdin Sapsuha