scholarly journals KEPADATAN POPULASI MAMALIA DARAT KARNIVORA DI CAMP LEAKEY KAWASAN TAMAN NASIONAL TANJUNG PUTING, KALIMANTAN TENGAH

Jurnal BIOMA ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. 83
Author(s):  
Siwi Arthapati Mandiri ◽  
Paskal Sukandar ◽  
Yossa Istiadi
Keyword(s):  
Data Collection ◽  
Population Density ◽  
National Park ◽  
Line Transect ◽  
Line Transect Sampling ◽  
Clouded Leopard ◽  
Helarctos Malayanus ◽  
Transect Sampling ◽  
Palm Civet ◽  
Leopard Cat

Borneo has wide land that support high biodiversity. One of them is Tanjung Puting National Park (TPNP), which have biodiversity such as terrestrial mammalian carnivore. Carnivore has a role to maintain its ecosystems. But, there are no data for population density of terrestrial mammalian carnivore. The object of this research is to find out population density of terrestrial mammalian carnivore in Camp Leakey, TPNP, Central Borneo. This research accomplished in September-October 2015 in Camp Leakey. Using line-transect sampling. Data collection was accomplished at 18.00-24.00 Central Indonesian Time (WITA) on eight transects with three times replication by direct surveys and indirect surveys. This research has obtained five species, malayan sun bear (Helarctos malayanus), sunda clouded leopard (Neofelis diardi), leopard cat, and group of civet, like small-toothed palm civet (Arctogalidia trivirgata) and asian palm civet (Paradoxurus hermaphroditus). Population density of each species from the highest to the lowest is 13,5 Individual of leopard cat/km2, 9,84 Individual of malayan sun bears/km2, 4,31 Individual of sunda clouded leopard/km2, and 3,65 Individual of civet/km2. Malayan sun bears, sunda clouded leopards and civets prefer to be in land forest. Leopard cats prefers to be in transition forest.

scholarly journals Demography and dynamics of mountain nyala Tragelaphus buxtoni in the Bale Mountains National Park, Ethiopia

2010 ◽  
Vol 56 (6) ◽  
pp. 660-669 ◽  
Author(s):  
Yosef Mamo ◽  
Michelle A. Pinard ◽  
Afework Bekele
Keyword(s):  
Population Density ◽  
National Park ◽  
Group Composition ◽  
Anthropogenic Factors ◽  
Line Transect ◽  
Age Group ◽  
Adult Males ◽  
Population Decrease ◽  
Transect Sampling ◽  
Significant Difference

Abstract We studied the population dynamics of endangered mountain nyala Tragelaphus buxtoni between 2003-2005 in the Bale Mountains National Park. Line-transect sampling and total count methods were used to gather data on demographics and movement patterns. The population's age-group composition was 58% adults, 25% sub-adults, 9% juveniles, 5% calves and 3% unidentified with a female-male sex ratio of 2:1. Population density was found to be significantly different between the two sub-populations (Dinsho Sanctuary and Gaysay/Adelay). A significant difference was found for age-group composition across the two sub-populations except adult females, sub-adult males and calves. The Dinsho sub-population was an isolated group. Separation and containment of the mountain nyala population could have negatively affected their ability to search for habitat requirements and mates from distant areas. The population varied between 830-908 individuals (95% CI), a reduction of 45% from earlier reports. However, the mean population density increased due to contraction of the species' habitat range. We observed a population decrease of 2%-5% per year over the course of our study. Many of the assessed demographic parameters did not significantly change over the three years. This suggests that the decrease in nyala population was not due to random variations in reproduction. Anthropogenic factors such as competition with livestock for forage, habitat encroachment and poaching by the local people might have been partly responsible for the depleted population in our study areas.

scholarly journals Population Density of Kloss’s Gibbon (Hylobates klossii) at Bojakan Resort, Siberut Island, West Sumatra

2019 ◽  
Vol 24 (3) ◽  
pp. 237-244
Author(s):  
Vallen Sakti Maulana ◽  
Ani Mardiastuti ◽  
Entang Iskandar ◽  
Jansen Manansang
Keyword(s):  
Population Density ◽  
Natural Resources ◽  
Line Transect ◽  
Line Transect Sampling ◽  
International Union ◽  
Transect Sampling ◽  
West Sumatra ◽  
Hylobates Klossii

Bilou (Hylobates klossii) merupakan satwa primata endemik Kepulauan Mentawai, Sumatera Barat dan ditetapkan sebagai satwa primata dengan status terancam/genting (endangered) berdasarkan kategori IUCN (International Union for Conservation of Nature and Natural Resources) tahun 2008. Saat ini, informasi populasi bilou terbaru di Pulau Siberut belum diketahui secara lengkap dan menyeluruh. Penilaian terhadap populasi dijadikan sebagai landasan dalam menentukan strategi konservasi. Penelitian bertujuan mengidentifikasi populasi bilou yang meliputi distribusi populasi, kepadatan individu, kepadatan kelompok, ukuran kelompok, serta komposisi kelompok. Penelitian dilaksanakan di Resort Bojakan, Taman Nasional Siberut, Pulau Siberut, Kepulauan Mentawai, Sumatera Barat pada bulan November 2018 sampai Januari 2019. Pengamatan dan pengukuran parameter populasi bilou dilakukan dengan metode line transect sampling. Total perjumpaan dengan bilou sebanyak 77 individu dengan jumlah 25 kelompok. Nilai kepadatan individu 12,8 individu/km2, dan kepadatan kelompok 4,2 kelompok/km2. Rerata ukuran kelompok bilou di Resort Bojakan 3,08 individu/kelompok. Keberadaan populasi bilou di Resort Bojakan dipengaruhi akibat adanya gangguan aktivitas manusia. Kepadatan populasi bilou di Resort Bojakan lebih tinggi dibandingkan dengan penelitian-penelitian sebelumnya di wilayah Pulau Siberut. Persentase kelompok bilou yang memiliki ukuran kelompok lebih dari dua individu lebih tinggi dibandingkan kelompok dengan jumlah dua individu, yang menandakan kawasan Taman Nasional Siberut terutama di Resort Bojakan mendukung pertumbuhan populasi bilou. Proses regenerasi bilou masih terus berlangsung karena jumlah kelompok yang memiliki minimal satu keturunan atau lebih masih cukup banyak. Pemantauan dan patroli oleh pihak Taman Nasional diperlukan untuk memastikan keberadaan populasi bilou di Resort Bojakan.   Kata kunci: primata endemik, bilou, metode garis transek, monogami

scholarly journals Populasi Monyet Ekor Panjang (Macaca fascicularis) di Kawasan Batuan Kapur Jawa Barat

2019 ◽  
Vol 11 (2) ◽  
pp. 68
Author(s):  
Agus Pambudi Dharma ◽  
Gufron Amirullah
Keyword(s):  
Population Density ◽  
Macaca Fascicularis ◽  
Line Transect ◽  
Line Transect Sampling ◽  
Transect Sampling ◽  
Males And Females ◽  
Number Of Individuals

Abstrak. Monyet ekor panjang (Macaca fascicularis) merupakan satwa primata termasuk ke dalam Genus Macaca. Monyet ekor panjang mempunyai daya adaptasi yang tinggi terhadap lingkungan sehingga populasi yang ada di alam semakin bertambah setiap tahunnya. Penelitian ini bertujuan untuk mengetahui jumlah individu dan kepadatan populasi monyet ekor panjang (M. fascicularis) di Gunung Kapur Cicadas Desa Ciampea. Penelitian ini dilaksanakan pada bulan April sampai Juli 2015. Pengumpulan data menggunakan metode jalur (line transect sampling). Hasil penelitian ini diperoleh total individu monyet ekor panjang sebanyak 245 individu dengan jumlah masing-masing individu jantan dan betina dewasa diperoleh 38 individu (15,51%), remaja 56 individu (22,86%), anak 91 individu (37,14%), dan bayi 22 individu (8,98%), dan kepadatan populasinya sebesar 2,0 individu/Ha.Kata Kunci: Populasi, Monyet Ekor Panjang, Gunung Cicadas, Ciampea, Bogor Abstract. Long-tailed macaque (Macaca fascicularis) is a species of primates into the Genus Macaca. Long-tailed monkeys have high adaptability to the environment so that the population that exists in nature is growing every year. This study aims to determine the number of individuals and the population density of long-tailed macaques (M. fascicularis) in Gunung Kapur Cicadas Ciampea village. This study was conducted from April to July 2015. The datawas collected using a path (line transect sampling). The results of this study obtained individual total long-tailed macaques were 245 individuals with the number of individual males and females adult obtained 38 individuals (15,51%), juvenile 56 individuals (22,86%), children 91 individuals (37,14%), and infants 22 individuals (8,98%), and a population density of 2,0 individual / Ha.Keyword: Population, Long-tailed monkeys, Mount Cicadas, Ciampea, Bogor

scholarly journals Estimating a resource selection function with line transect sampling

2002 ◽  
Vol 6 (4) ◽  
pp. 213-228 ◽  
Author(s):  
Bryan F. J. Manly
Keyword(s):  
Resource Selection ◽  
Probability Function ◽  
Resource Selection Function ◽  
Line Transect ◽  
Selection Function ◽  
Line Transect Sampling ◽  
Selection Probability ◽  
Transect Sampling ◽  
Conditional Maximum ◽  
Habitat Variables

A resource selection probability function is a function that gives the prob- ability that a resource unit (e.g., a plot of land) that is described by a set of habitat variables X1 to Xp will be used by an animal or group of animals in a certain period of time. The estimation of a resource selection function is usually based on the comparison of a sample of resource units used by an animal with a sample of the resource units that were available for use, with both samples being assumed to be effectively randomly selected from the relevant populations. In this paper the possibility of using a modified sampling scheme is examined, with the used units obtained by line transect sampling. A logistic regression type of model is proposed, with estimation by conditional maximum likelihood. A simulation study indicates that the proposed method should be useful in practice.

scholarly journals Performance of Parametric Model for Line Transect Data

2020 ◽  
pp. 1-7
Author(s):  
Noryanti Muhammad ◽  
Gamil A.A. Saeed ◽  
Wan Nur Syahidah Wan Yusoff
Keyword(s):  
Simulation Study ◽  
Present Model ◽  
Parametric Model ◽  
Line Transect ◽  
Population Abundance ◽  
Line Transect Sampling ◽  
Detection Function ◽  
Transect Sampling ◽  
Proposed Model ◽  
Shoulder Condition

One of the most important sides of life is wildlife. There is growing research interest in monitoring wildlife. Line transect sampling is one of the techniques widely used for estimating the density of objects especially for animals and plants. In this research, a parametric estimator for estimation of the population abundance is developed. A new parametric model for perpendicular distances for detection function is utilised to develop the estimator. In this paper, the performance of the parametric model which was developed using a simulation study is presented. The detection function has non-increasing curve and a perfect probability at zero. Theoretically, the parametric model which has been developed is guar-anteed to satisfy the shoulder condition assumption. A simulation study is presented to validate the present model. Relative mean error (RME) and Relative Bias (RB) are used to compare the estimator with well-known existing estimators. The results of the simulation study are discussed, and the performance of the proposed model shows promising statistical properties which outperformed the existing models. Keywords: detection function, line transect data, parametric model

scholarly journals Double Kernel Method Using Line Transect Sampling

2016 ◽  
Vol 41 (2) ◽  
Author(s):  
Omar Eidous ◽  
M.K. Shakhatreh
Keyword(s):  
Kernel Method ◽  
Kernel Estimator ◽  
Real Data ◽  
Line Transect ◽  
Population Abundance ◽  
Line Transect Sampling ◽  
Numerical Examples ◽  
Bootstrap Techniques ◽  
Transect Sampling ◽  
Kernel Type

A double kernel method as an alternative to the classical kernel method is proposed to estimate the population abundance by using line transect sampling. The proposed method produces an estimator that is essentially a kernel type of estimator use the kernel estimator twice to improve the performances of the classical kernel estimator. The feasibility of using bootstrap techniques to estimate the bias and variance of the proposed estimator is also addressed. Some numerical examples based on simulated and real data are presented. The results show that the proposed estimator outperforms existingclassical kernel estimator in most considered cases.

Sign in / Sign up

Export Citation Format

Share Document