Estimating Relative Densities of Breeding Birds by the Line Transect Method. II. Comparison between Two Methods

1976 ◽  
Vol 7 (1) ◽  
pp. 43 ◽  
Author(s):  
Olli Jarvinen
Keyword(s):  
Breeding Birds ◽  
Line Transect ◽  
Line Transect Method

Estimating Relative Densities of Breeding Birds by the Line Transect Method

Oikos ◽  
1975 ◽  
Vol 26 (3) ◽  
pp. 316 ◽  
Author(s):  
O. Järvinen ◽  
R. A. Väisänen ◽  
O. Jarvinen ◽  
R. A. Vaisanen
Keyword(s):  
Breeding Birds ◽  
Line Transect ◽  
Line Transect Method

Abundance Estimation of Diving Animals by the Double-Platform Line Transect Method

Biometrics ◽  
2003 ◽  
Vol 59 (3) ◽  
pp. 512-520 ◽  
Author(s):  
Hiroshi Okamura ◽  
Toshihide Kitakado ◽  
Kazuhiko Hiramatsu ◽  
Mitsuyo Mori
Keyword(s):  
Abundance Estimation ◽  
Line Transect ◽  
Line Transect Method

scholarly journals Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season

Ring ◽  
2006 ◽  
Vol 28 (2) ◽  
pp. 119-125
Author(s):  
Michał Ciach ◽  
Dominik Wikar ◽  
Małgorzata Bylicka
Keyword(s):  
Breeding Season ◽  
Early Spring ◽  
Food Resources ◽  
High Density ◽  
Line Transect ◽  
Flock Size ◽  
Early Winter ◽  
Corvus Corax ◽  
Line Transect Method ◽  
Breeding Seasons

Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season During the 2002/2003-2004/2005 non-breeding seasons the density of the Raven in the open habitats of the Orawa - Nowy Targ Basin was studied by line transect method. The results were analysed in four periods (autumn, early winter, winter and early spring). The median density of Ravens did not differ significantly between individual periods and was respectively: 3.5, 3.8, 4.8 and 3.8 indiv. / 10 km. Number of birds during particular controls varied from 1.0 to 24.8 indiv. / 10 km. However, while excluding flocks, the median density of single individuals and pairs of the Raven was considerably lower and in subsequent periods reached respectively: 2.2, 2.4, 2.2 and 1.7 indiv. / 10 km. Flock size did not differ significantly between individual periods. Single individuals and, less often, groups of two birds were recorded mostly. Small (3-5 indiv.) and medium (6-15 indiv.) flocks were recorded rarely and large flocks (16 indiv. and above) - only exceptionally. The high density and strong fluctuations of abundance of Ravens were determined by flocks presence, which was probably linked to irregular occurrence of food resources.

scholarly journals STUDI EKOLOGI SUMBERDAYA TERIPANG DI NEGERI PORTO PULAU SAPARUA MALUKU TENGAH

2014 ◽  
Vol 1 (1) ◽  
pp. 32-42
Author(s):  
Yona Aksa Lewerissa
Keyword(s):  
Sea Cucumber ◽  
Water Environment ◽  
Turbidity Current ◽  
Line Transect ◽  
Community Structures ◽  
Sea Cucumbers ◽  
Environment Factors ◽  
Line Transect Method ◽  
Environment Measurement

Background: Decreasing of sea cucumber resources on numbers and size of fishing capture in Negeri Porto waters influenced its community structures. Further, water environment steadiness will questionable. For this reason, study was done to analyzed community structures of sea cucumbers include of numbers species found, density, potency, species presence frequency, distribute pattern, ecology index and environment measurement. Method: Research done on February to May, 2008 at Negeri Porto used Line Transect Method. Result: showed there were eight species of sea cucumbers found (potency as much as 12.286 individuals). Bohadschia marmorata got highest in numbers species found, density, potency and species presence frequency. There were three distribute pattern of sea cucumbers found wich are uniform, random and group. Conclusion: Sea cucumbers diversity was in lower, species are closed to compatible. B. marmorata and Holothuria edulis are tends to dominate this water. Environment factors such temperature, pH, salinity, DO, turbidity, current and sediment distribute showed that Porto waters was suitable to sea cucumbers growth.

scholarly journals Estimation of Orangutan Population in Sibongkaras Pakpak Bharat Village Forest Area

Elkawnie ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 133
Author(s):  
Juhardi Sembiring ◽  
Taufiq Siddiq Azvi
Keyword(s):  
Sampling Method ◽  
Data Retrieval ◽  
Forest Area ◽  
Line Transect ◽  
Habitat Conditions ◽  
Dominant Position ◽  
Purposive Sampling ◽  
Management Measures ◽  
Nahdlatul Ulama ◽  
Line Transect Method

Abstract : Orangutan is classified as an endangered species. Forest clearance for a variety of purposes and functions over the region led to the limited habitat for orangutans. Orangutans habitat is fragmented into several regions led to the survival of a population of a species depends on habitat conditions. Performing a nest survey is important to give a deeper understanding of the ecology and help determine the best protective management measures. We provide basic data of orangutan density and orangutan nesting characteristics in protected forest area Sibongkaras village. This study was conducted in April 2019 until June 2019 in protected forest area Sibongkaras village, Pakpak Bharat. Tracking begins with observed the presence of a nest based on a purposive sampling method. And data retrieval was done by line transect method. Data analyzed at Universitas Nahdlatul Ulama Sumatera Utara. Our result showed that the orangutan population density was 0.0072 individuals/km2 or 0.72 individuals/ha. The dominant position of the nest is in a position which is a position I nest close to the main stem of the tree with the nest number 13 (43.3%). Generally, the nest is found at an altitude of  >15 meters with a sum of 27 nests (90%).Abstrak : Orangutan diklasifikasikan sebagai spesies yang terancam punah. Penebangan hutan untuk berbagai tujuan dan fungsi di kawasan tersebut menyebabkan terbatasnya habitat orangutan. Habitat orangutan yang terfragmentasi menjadi beberapa wilayah menyebabkan kelangsungan hidup suatu populasi suatu spesies tergantung pada kondisi habitat. Melakukan survei sarang penting untuk memberikan pemahaman yang lebih dalam tentang ekologi dan membantu menentukan langkah-langkah manajemen perlindungan terbaik. Kami menyediakan data dasar kepadatan orangutan dan karakteristik sarang orangutan di kawasan hutan lindung Desa Sibongkaras. Penelitian ini dilakukan pada bulan April 2019 hingga Juni 2019 di kawasan hutan lindung Desa Sibongkaras, Pakpak Bharat. Pengamatan dimulai dengan mengamati keberadaan sarang berdasarkan metode purposive sampling. Dan pengambilan data dilakukan dengan metode transek garis. Data yang diperoleh di analisis di Universitas Nahdlatul Ulama Sumatera Utara. Hasil Penelitian kami menunjukkan kepadatan populasi orangutan di 0,0072 individuals/km2 atau 0,72 individu / ha. Posisi sarang yang dominan adalah pada posisi sarang yang berada di posisi paling dekat dengan batang utama, dengan jumlah sarang 13 (43,3%). Umumnya sarang ditemukan di ketinggian > 15 meter dengan jumlah 27 sarang (90%).

A Remark on the Line Transect Method

1982 ◽  
Vol 24 (2) ◽  
pp. 191-195 ◽  
Author(s):  
D. Stoyan
Keyword(s):  
Line Transect ◽  
Line Transect Method

scholarly journals Inventarisasi Jenis-Jenis Kadal (Sub Ordo Sauria) di Kawasan Hutan Primer, Hutan Sekunder dan Pemukiman di Desa Parek Kacamatan Air Besar Kabupaten Landak

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Jepri Noperese Ari Hepi Yanti, Tri Rima Setyawati
Keyword(s):  
Secondary Forest ◽  
Primary Forest ◽  
Line Transect ◽  
Line Transect Method ◽  
Open Forests

Parek Village Air Besar District Landak Regency has two types of forests, primary forest and secondary forest. Parek villagers generally open forests for farming, the activities of these residents can disrupt the existence of the Sauria Sub-Order. The purpose of this study was to determine the species of Sauria Sub-Order in Parek Village.  The research was conducted by exploration method which was combined with the line transect method in the area of primary forest, secondary forest and settlement. The results of the study found 7 species from the Sauria Sub-Order there are Gonocephalus borneensis, Tachydromus sexlineatus, Cyrtodactylus sp., Hemidactylus sp., Draco sp., Eutropis multifasciata and Apterygodon vittatum which belong to 4 families, Scincidae, Gekkonidae, Agamidae and Lacertidae.

scholarly journals HABITAT DAN SEBARAN TIKUS BERKANTUNG (Echymipera rufescens) DI PULAU WAMAR KABUPATEN KEPULAUAN ARU

2020 ◽  
Vol 8 (1) ◽  
pp. 109
Author(s):  
Charolina Larwuy ◽  
Maya Marsya Silvia Puttileihalat ◽  
Lesly Latupapua
Keyword(s):  
Sweet Potato ◽  
Pattern Analysis ◽  
Horizontal Distribution ◽  
Line Transect ◽  
Wild Animals ◽  
Line Transect Method ◽  
Index Value ◽  
Line Intercept

The purpose of this research was to know thehabitat and distribution of MarsupialRats (Echymipera rufescens) on Wamar Island (Wangel Village, Durjela Village, Gunung Sembilan and Back of Wamar Village)Aru Island District. The method used for Marsupial Rats was the catching of wild animals and then the animals that have been capturedin the mark and back again, while for the catching of Marsupial Rats was a tool used is a trap.Analysis of distribution of Marsupial Ratsusing Morista Index while to know the habitat of Marsupial Rats using Line Intercept (line transect) method and the printed path from the analysis to know the pattern of distributionused Morista Index. The result of the research showed that the awareness of the pattern analysis of the Marsupial Rats distribution to the four locations including Wangel Village, Durjela Village, Gunung Sembilan and Back of Wamar Village, from the pattern of horizontal distribution of Marsupial Rats that was the same as random with the index values were Wangel Village was 0.067, Durjela Village was 0.067, Gunung Sembilan village was 0,000, and Back of Wamar village was 0,000. So the pattern of distribution on Wamar Island was random with index value of 0.079. Habitat from the Marsupial Rats own were secondary dryland forest and mixed with shrubs which was his habitat while the feed frm the Marsupial Rats was Galoba, Calladium, Sweet Potato, and Bananas.

scholarly journals Keanekaragaman dan Kerapatan Jenis Mangrove di Desa Kase Kecamatan Leksula Kabupaten Buru Selatan

2020 ◽  
Vol 7 (1) ◽  
pp. 1055
Author(s):  
Efraim Samson ◽  
Vergenia Sigmarlatu ◽  
Deli Wakano
Keyword(s):  
Diversity Index ◽  
Line Transect ◽  
Mangrove Species ◽  
Mangrove Area ◽  
Rhizophora Apiculata ◽  
Index Analysis ◽  
Sonneratia Alba ◽  
Bruguiera Gymnorhiza ◽  
Density Values ◽  
Line Transect Method

This study aims to determine the diversity and density of mangrove vegetation in Kase Village, Leksula Subdistrict, South Buru Regency. The study uses the line transect method with several observation plots that are stratified. A total of 20 transects were placed at the study site with the size of each plot, namely for seedling level, which is 2 x 2 m, while for the level of a sapling, namely 5 x 5 m and for the level of trees, which is 10 x 10 m. The results showed that in the mangrove area in Kase Village, Leksula Subdistrict, South Buru Regency, 3 mangrove species were found, namely Rhizophora apiculata, Bruguiera gymnorhiza, and Sonneratia alba, which belong to two families (Rhizophoraceae, Sonneratiaceae) and 3 genera, (Rhizophora, Bruguiera, Sonneratia). The total number of mangrove individuals, that is 699 individuals from 419 levels of seedlings, 116 levels of a sapling, and 164 levels of trees. The species with the highest density and relative density values at the level of tree growth, namely Rhizophora apiculata, and at the level of sapling and seedlings, namely Bruguiera gymnorhiza. While Sonneratia alba, tends to have density values and species densities that tend to be low at all three growth rates. Furthermore, the results of the diversity index analysis in the mangrove area of Kase Village, Leksula Subdistrict, South Buru Regency, showed that the diversity of species (H´) mangroves for each growth level was 0.76 (seedlings); 0.82 (sapling); and 1.02 (trees), or classified as low to moderate category. Keywords: Mangrove, Diversity, Abundance, Kase Village  Abstrak Penelitian ini bertujuan untuk mengetahui keanekaragaman dan kerapatan jenis vegetasi mangrove di Desa Kase, Kecamatan Leksula Kabupaten Buru Selatan. Penelitian menggunakan metode line transect dengan beberapa plot pengamatan yang dibuat bertingkat. Sebanyak 20 transek ditempatkan pada lokasi penelitian dengan ukuran plot masing-masing, yakni untuk tingkat semai, yakni 2 x 2 m, sedangkan untuk tingkat anakan, yakni 5 x 5 m dan untuk tingkat pohon, yakni 10 x 10 m. Hasil penelitian menunjukkan bahwa pada area mangrove di Desa Kase Kecamatan Leksula Kabupaten Buru Selatan, ditemukan 3 spesies mangrove yakni Rhizophora apiculata, Bruguiera gymnorhiza, dan Sonneratia alba, yang tergolong ke dalam dua family (Rhizophoraceae, Sonneratiaceae) dan 3 genus, (Rhizophora, Bruguiera, Sonneratia). Jumlah total individu mangrove, yakni 699 individu yang terdiri dari 419 tingkat semai, 116 tingkat anakan, dan 164 tingkat pohon. Spesies dengan nilai kerapatan dan kerapatan relatif tertinggi pada tingkat pertumbuhan pohon, yakni Rhizophora apiculata, dan pada tingkat anakan serta semai, yakni Bruguiera gymnorhiza. Sedangkan Sonneratia alba, cenderung memiliki nilai kerapatan dan kerapatan jenis yang cenderung rendah pada ketiga tingkat pertumbuhan tersebut. Kemudian, hasil analisis indeks keanekaragaman di area mangrove Desa Kase Kecamatan Leksula Kabupaten Buru Selatan, menunjukan bahwa keanekaragaman jenis (H´) mangrove untuk masing-masing tingkat pertumbuhan, yakni 0.76 (semai); 0.82 (anakan); dan 1.02 (pohon), atau tergolong kategori rendah hingga sedang.                                                      Kata Kunci: Mangrove, Keanekaragaman, Kerapatan, Desa Kase

scholarly journals Komposisi Jenis dan Populasi Burung Cendrawasih di Kampung Malagufuk Distrik Klayili Kabupaten Sorong Provinsi Papua Barat

2020 ◽  
Vol 7 (2) ◽  
pp. 151-162
Author(s):  
MAYA PATTIWAEL ◽  
AMATUS TUROT
Keyword(s):  
Species Composition ◽  
Bird Species ◽  
Line Length ◽  
Natural Forest ◽  
Line Transect ◽  
Natural Forests ◽  
Diverse Species ◽  
West Papua ◽  
Line Transect Method ◽  
Papua Barat

One of the animals that are easy to find is a bird. Based on data about the increase in the number of bird species, it can be ascertained that these animals can be found in every region in Indonesia, with diverse species and even species that are endemic to a certain area. West Papua is one of the regions in Indonesia which is rich in various species of birds, including Cendrawasih which can also be found in the Natural Forest of Malagufuk Village, Klayili District, Sorong Regency. Based on information from the surrounding community, several types of Cendrawasih are often seen in the natural forests of Malagufuk Village, but their diversity and population are not known with certainty. This study aims to determine the diversity of species and population of Cendrawasih birds in the natural forest of Malagufuk Village, Klayili District, Sorong Regency, West Papua. Thus, the results of this study are expected to be a source of data in the context of preserving and protecting the existing Cendrawasih species. Data collection on the species composition and population of Cendrawasih was carried out using the Line Transect method by making 10 observation lines with a line length of 500 m each and a distance between lines of 100 m. The results showed that there were found 3 spesies of Cendrawasih with estimated populations and densities as follows: Cendrawasih Kuning Kecil (Paradisaea minor) had an estimated population of 7.48 individuals with a density of 2.93 individuals / ha; Cendrawasih Raja (Cicinnurus regius) has an estimated population of 5 individuals with a density of 1.67 individuals / ha; and Toowa Cemerlang (Ptiloris magnificus) had an estimated population of 2.22 individuals with a density of 0.74 individuals / ha. When the research was carried out, it was seen that the three types of Cendrawasih used several types of trees as places for activities (playing or dancing), namely Matoa (Pometia coreacea), Merbau (Intsia bijuga), Damar (Agathis dammara). Beringin (Ficus benjamina), and Pala hutan (Myristica sp) with tree heights above 20 m.

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