scholarly journals Struktur Komunitas Uca Sp Di Kawasan Teluk Benoa Pada Karakteristik Substrat Yang Berbeda

2017 ◽  
Vol 4 (1) ◽  
pp. 141
Author(s):  
Ni Wayan Loviasari ◽  
Abd. Rahman As-syakur ◽  
Elok Faiqoh ◽  
I Gusti Ngurah Putra Dirgayusa ◽  
Dwi Budi Wiyanto
Keyword(s):  
Sampling Method ◽  
Sandy Loam ◽  
Mangrove Ecosystem ◽  
Sampling Time ◽  
Breeding Ground ◽  
Dominance Index ◽  
Sandy Substrate ◽  
Low Diversity ◽  
High Dominance

The mangrove ecosystem is home to a variety of fauna, ranging from water animals to primates, as a breeding ground for a variety of aquatic animals such as fish, crustaceans, crabs and mollusks, as well as a place to feed a number of wildlife such as reptiles and mammals. Uca sp is one of the fauna that utilizes and helps mangrove in its ecological balance. This research was conducted on 3 mangrove areas with the purpose of knowing the types and structure of Uca sp community on different substrate characteristics, where in Mertasari mangrove have the type of sandy substrate, Muara Waduk Nusa Dua Denpasar has kind of sandy loam substrate and Tanjung Benoa has kind sandy substrate. The sampling time was conducted in December 2016 when the lowest tide of the month. Determination of stations taken at each research location (station) using purposive sampling method. From the results of the study found Uca sp as many as 5 types, namely Uca cryptica, Uca dussumieri, Uca rosea, Uca cryptica and Uca crassipes. The highest density of Uca sp that is at station 2 located in Muara Waduk Nusa Dua Denpasar is 52,75 ind/m2 and lowest at station 3 in Tanjung Benoa get 32,25 ind /m2. The index values ??of the diversity of the three research stations are categorized into low diversity. In all three research stations categorized into uniformity index with depressed community or low uniformity. Based on the calculation on the three stations have a high dominance index.

scholarly journals Kelimpahan Dan Keanekaragaman Jenis Ikan di Perairan Ndalir Kabupaten Merauke, Papua

2021 ◽  
Vol 1 (2) ◽  
pp. 33-42
Author(s):  
Dandi Saleky ◽  
Efraim Weremba ◽  
Marius A. Welikken
Keyword(s):  
Relative Abundance ◽  
Fish Species ◽  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Data ◽  
Dominance Index ◽  
Sampling Points ◽  
Index Value

This study aims to analyze the diversity of fish species caught on the Ndalir Coast of Merauke Regency. This research was conducted in Juli-August 2020. The determination of the sampling points at the research location used the purposive random sampling method with two observation stations. Analysis of the research data using relative abundance (Kr), Shannon-Wienner index (H '), uniformity index (E), and dominance index (C), The number of fish catches during the study time was 431 which were divided into 12 species of fish. Station two has a greater number of catches than station one. The highest relative abundance was tongue fish (Cynoglossus abbreviation) (Station I) and mullet (Mugil cephalus) (Station II). The diversity index value at the two observation stations is in the medium category. The uniformity and dominance index values ​​show that the species at the two research stations are evenly distributed with no dominating species.

scholarly journals Study of Fish Community in Ulak Lia Lake Sekayu, Musi Banyuasin Regency

2021 ◽  
Vol 2 (1) ◽  
pp. 25
Author(s):  
Helmizuryani Helmizuryani ◽  
Meika Puspita Sari ◽  
Alpis Alpis ◽  
Khusnul Khotimah ◽  
Boby Muslimin
Keyword(s):  
Global Positioning System ◽  
Fish Community ◽  
Sampling Method ◽  
Diversity Index ◽  
Fish Abundance ◽  
Positioning System ◽  
Dominance Index ◽  
Global Positioning ◽  
Dominant Fish ◽  
Low Diversity

This study aims to determine fish's diversity, abundance, and dominance in Ulak Lia Lake, Sekayu District. This research was conducted at Lake Ulak Lia, Sekayu District, Musi Banyuasin Regency, from February to March 2021. The fish sampling method was performed by direct catching at three predetermined observation stations using nets. Netting was carried out for 12 hours, taking catches with traps that have been installed in the morning from 7 a.m. to 9 a.m., depending on conditions or weather. Sampling was marked using a bamboo buffer and the help of the Global Positioning System (GPS). The results showed that the Diversity Index ranged from 1.85 to 1.91 indicating low diversity. The fish abundance index ranged from 30.16 to 36.87 indicating low fish abundance. Where the Dominance Index 0.71-0.72 shows a moderate dominance index. Meanwhile, the dominant fish in Ulak Lia Lake is the Sapil fish (Helostoma temminckii).

scholarly journals Diversity and distribution bromeliads plants as breeding habitat for mosquito larvae (Diptera: Culicidae) in Bogor, Indonesia

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
M Ikhsan ◽  
UPIK KESUMAWATI HADI ◽  
SUSI SOVIANA
Keyword(s):  
Aedes Albopictus ◽  
Culex Quinquefasciatus ◽  
Dominant Species ◽  
Sampling Method ◽  
Breeding Site ◽  
Breeding Habitat ◽  
Mosquito Larvae ◽  
Breeding Ground ◽  
Armigeres Subalbatus

Abstract. Ikhsan M, Hadi UK, Soviana S. 2020. Diversity and distribution bromeliads plants as breeding habitat for mosquito larvae (Diptera: Culicidae) in Bogor, Indonesia. Biodiversitas 21: 3494-3498. Bromeliads leaf structure can hold water and has potential as the breeding ground for mosquitoes. Information regarding the potential of bromeliads as a habitat for mosquito larvae in Indonesia is limited. This study aims to identify the diversity of bromeliads and their potential as breeding habitat for mosquito larvae in West Bogor Sub-district, Bogor City, West Java, Indonesia. Determination of the sample using purposive sampling method. Larvae collections were carried out on bromeliads that were outside the building in December 2019 to Maret 2020. The collection used a 50 ml syringe that was modified using a small pipe. Total bromeliads collected were 117 consisted of Neoregelia, Cryptanthus, dan Alcantarea from 50 observation points. The percentage of mosquito larvae presence from bromeliads was 74.4%. Total larvae collected were 859 larvae consisting of Aedes albopictus, Aedes aegypti, Aedes spp., Armigeres subalbatus, and Culex quinquefasciatus. The diversity of mosquito larvae found in the bromeliads were low (H'=0.16), while the dominant species of mosquito larvae were Ae. albopictus (61.55%) and confirmed as the second vector of Dengue Fever in Indonesia. The results of this study indicate that bromeliads have potential as a breeding site for mosquito larvae in West Bogor Sub-district, Bogor City.

ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI DAN PENENTUAN HARGA JUAL ATAS PRODUK (Studi Kasus Pada PT Dasa Windu Agung)

2016 ◽  
Vol 1 (2) ◽  
pp. 183-190
Author(s):  
Dwi Urip Wardoyo
Keyword(s):  
Manufacturing Industry ◽  
Sampling Method ◽  
Manufacturing Companies ◽  
Test Analysis ◽  
Automotive Components ◽  
Convenience Sampling ◽  
Cost Of Production ◽  
The Cost ◽  
Keywords Cost

This study aims to determine the determination of the cost of production for products produced by PT. DWA. The Company is engaged in the manufacturing industry specialized in automotive components. Its activity is carried out through a series of production processes, so that expenses spent in the production will be calculated into the cost of the production sold. The population in this study were all manufacturing companies in Jakarta. Convenience sampling method selected one of the companies that get the confidence to assemble three national car project in Indonesia, namely Timor, Bakrie and Maleo. Test analysis used in this study is to test the calculation of full costing with job order costing. This study shows that (a) determination of the cost elements associated with the cost of production and (b) determining the cost of production on a product-based job costing with full costing approach. Keywords: cost of production, full costing

Determination of water content in drying soils: incorporating transition from liquid phase to vapour phase

Soil Research ◽  
2004 ◽  
Vol 42 (1) ◽  
pp. 1 ◽  
Author(s):  
F. Konukcu ◽  
A. Istanbulluoglu ◽  
I. Kocaman
Keyword(s):  
Water Content ◽  
Transition Zone ◽  
Sandy Loam ◽  
Vapour Phase ◽  
Coarse Sand ◽  
Arid Environments ◽  
Evaporation Front ◽  
Matric Potential ◽  
Silty Loam

In arid and semi-arid environments, soil profiles often exhibit a liquid–vapour displacement known as evaporation front characterised by a critical matric potential (ψme) or water content (θe) located somewhere inside the unsaturated zone above a watertable (WT). The objective of this study was to determine the θe including the range of water content (θ) in the transition zone from liquid to vapour both theoretically and experimentally for different soil textures under saline and non-saline WTs. Characteristic shapes of water content and salt concentration profiles were the criteria to obtain θe experimentally, and the θ–diffusivity relationship was used to compute the θe and θ range in the transition zone. Measured θe values of 0.05 and 0.12 m3/m3 under non-saline WT and 0.07 and 0.15 m3/m3 under saline WT were in agreement with the computed values of 0.05 and 0.10 m3/m3 for sandy loam and clay loam soils, respectively. The model calculates roughly the same θe for saline and non-saline conditions. Besides experimental soils, θe and range of θ in the transition zone were calculated for silty loam and coarse sand. The lighter the soil texture, the smaller is θe and the steeper the transition zone. The results were further compared with those calculated by different authors.

ANALISA LOGAM BESI (Fe) DI SUNGAI PASAR DAERAH BELANGWETAN KLATEN DENGAN METODE SPEKTROFOTOMETRI SERAPAN ATOM

2017 ◽  
Vol 2 (1) ◽  
pp. 39
Author(s):  
Rahmi Nurhaini ◽  
Arief Affandi
Keyword(s):  
Heavy Metals ◽  
Sampling Method ◽  
Research Result ◽  
The Body ◽  
Clean Water ◽  
Observational Method ◽  
The Mean ◽  
The Republic

Iron (Fe) is one of many heavy metals that is corrosive resistant, dense, and has a low melting point. If accumulated in the body, the metal can cause some medical conditions, such as irritation to skin and eyes, breathing problems, and in the long term, cancer. This research aims to know generally the spread of metallic iron (Fe) in the river Pasar in Belangwetan, Klaten. This study was conducted using an observational method in which researchers did not examine the effects of interventions. Sampling was done using purposive sampling method taken from three points, namely the upper, middle, lower. Determination of iron levels by Atomic Absorption Spectrophotometer (AAS) obtained a positive result, and the data was processed using SPSS to determine the Mean and Standard Deviation. Of the research result, it could be known the Mean score was 2.33 ppm and SD was 0.0352. The result of this research indicated that the levels of iron in the river Pasar in Belangwetan were 2.33 ppm. It means that the levels violate the regulation of the Minister of Health of the Republic of Indonesia, which is not more than 1mg/L (1ppm) in the clean water

scholarly journals Analisis Hubungan Kelimpahan Plankton di Permukaan Terhadap Hasil Tangkapan Ikan Lemuru (Sardinella lemuru) di Selat Bali

2017 ◽  
Vol 4 (1) ◽  
pp. 151
Author(s):  
Hasanuddin Parulian Sihombing ◽  
I Gede Hendrawan ◽  
Yulianto Suteja
Keyword(s):  
Sampling Method ◽  
Strong Relationship ◽  
Zooplankton Abundance ◽  
Sampling Point ◽  
Water Sampling ◽  
Phytoplankton Abundance ◽  
Fish Food ◽  
Area Sampling ◽  
The Relationship

Lemuru fish is one of fishery commodity that has high economical value and one of fish that most catched by fisherman in Bali Strait. Lemuru fish had been caught in Bali Strait was fluctuating every month and every years. This condition was related with food source of Lemuru fish such as phytoplankton and zooplankton. So this research was conducted to explained the relationship phytoplankton and zooplankton abundance with Lemuru fish catched  in Bali strait. This study focus in Bali strait during March until May 2017. Determination of sampling point used area sampling method while water sampling occured in surface water with pouring method. Total of phytoplankton and zooplankton abundance in Bali strait in March until May had formed the sinusoidal model with their abundance ranged 301 ind/L – 604 ind/L and 7 ind/L – 12 ind/L. Plankton abundance in Bali strait in March until May (transisonal season 1) was categorized low abundance if compared with plankton abundance in another season. The low value of phytoplankton abundance caused by non upwelling phenomenon and grazing process and the low abundance of zooplankton caused by low rate of zooplankton and predation by Lemuru fish. Phytoplankton and zooplankton abundance had  strong relationship with Lemuru fish catched with correlation coefficient value 0.76 and 0.69. This condition caused by phytoplankton and zooplankton are source of Lemuru fish food.

scholarly journals Effect of Fertilizer Management on NPKS Leaching Loss from Sandy Loam Soil under Alternate Wetting and Drying Condition

2016 ◽  
Vol 20 (1) ◽  
pp. 59-64
Author(s):  
MN Islam ◽  
MM Rahman ◽  
MJA Mian ◽  
MH Ali
Keyword(s):  
Sandy Loam ◽  
Foliar Spray ◽  
Sandy Loam Soil ◽  
Fertilizer Management ◽  
Wetting And Drying ◽  
Leaching Loss ◽  
Randomized Design ◽  
Loam Soil ◽  
Dry Soil

Leaching loss of nutrients hampers plant growth and contributes to environmental pollution. An experiment was conducted at the net house of Soil Science Department, Bangladesh Agricultural University, Mymensingh during January to May 2009 to find out the leaching loss of N, P, K and S from sandy loam soil. Each pot received 6.67 kg dry soil with an opening at the bottom for collecting leachates. Six treatments were used: T0 = control, T1 = NPKS (120, 25, 60 and 20 kg ha-1), T2 = NPKS (180, 37, 90 and 30 kg ha-1), T3 = NPKS (90, 5, 28 and 17 kg ha-1) + cowdung (2.5 t ha-1), T4 = NPKS (109, 25, 60 and 20 kg ha-1, N as USG) and T5 = as T1 but N applied as foliar spray. Treatments were arranged in a completely randomized design with three replications. Leachates were collected at 15 days interval for determination of NPKS. The total leaching loss of N, P, K and S due to different treatments ranged from 16.00 to 90.21, 0.07 to 0.29, 9.60 to 11.20 and 3.75 to 17.81 kg ha-1, respectively. Application of chemical fertilizer at higher rates resulted in greater loss of nutrients. Integrated fertilizer management with cowdung (T3) minimized such losses. Use of USG also reduced leaching loss of N, P, K and S. The application of cowdung and USG with recommended balanced fertilizer might be useful for minimizing N, P, K and S loss from wetland rice field.Bangladesh Rice j. 2016, 20(1): 59-64

scholarly journals Reputasi Auditor sebagai Pemoderasi Pengaruh Opini Audit dan Pergantian Manajemen pada Auditor Switching

2020 ◽  
Vol 30 (10) ◽  
pp. 2456
Author(s):  
Nyoman Ratna Candradewi ◽  
Gayatri Gayatri
Keyword(s):  
Regression Analysis ◽  
Sampling Method ◽  
Significant Positive Effect ◽  
Audit Opinion ◽  
Management Change ◽  
Analysis Techniques ◽  
Opinion Change ◽  
Auditor Switching ◽  
Positive Effect

Auditor turnover is a behavior that the client company does to transfer the auditor. This reaserch aims to obtain empirical evidence of the effect of audit opinion and management change on auditor switching and how the auditor's reputation is able to moderate the influence of audit opinion and management change on auditor switching. Determination of the research sample using purposive sampling method with a sample of 145 companies. Data analysis techniques used are logistic regression analysis and Moderated Regression Analysis (MRA). Based on the results of this study indicate that audit opinion and management change have a significant positive effect on auditor switching. However, the auditor's reputation is unable to moderate the effect of audit opinion and management change on auditor switching. Keywords: Audit Opinion; Change of Management; Auditor Switching; Auditor’s Reputation.

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