scholarly journals KONDISI TERUMBU KARANG DI PERAIRAN PULAU BATU BILIS, BUNGURAN UTARA, KABUPATEN NATUNA

OSEANA ◽  
2021 ◽  
Vol 46 (1) ◽  
pp. 13-22
Author(s):  
Juardi Mardani ◽  
Dedy Kurniawan ◽  
Susiana Susiana

The purpose of this study was to determine the type of coral life forms and cover percentages on Batu Bilis Island. This research was conducted by purposive sampling method, where the determination of the 3 (three) research locations in this study were based on coral location observations and map images. The study results show there are 9 (nine) types of coral life forms in Location 1 dominated by 13.47% of Coral Massive (CM), 7 (seven) types of coral life forms in Location 2 dominated by 17.13% of Acropora encrusting (ACE), and 13 types of coral life forms in Location 3 dominated by 28.90% of Coral Massive (CM). The coral cover percentages are 40.90% of the medium category in Location 1, 31.60% of the medium category in Location 2, and 53.90% of the good category in Location 3. The condition of environmental parameters in Batu Bilis Island was considered good for coral reefs.

2019 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Aisyah Aisyah

This research is experimental research on students class XI of MIPA in SMA Negeri 3 Purwokerto. This research takes the title of "The Influence of the Application of the Cooperative Learning Model Type Course Review Horay (CRH) Against the Liveliness of learning and the Results of the Economic Study (study on the Grade XI MIPA in SMA Negeri 3 Purwokerto)". The purpose of this research is to know the difference in learning outcomes and learning activity between the learning model Course Review Horay (CRH) with conventional learning model, to know the influence of learning model Course Review Horay (CRH) against the learning outcomes and learning activity, as well as to know the influence of the liveliness of the learning results of learning. The population of this research is the grade XI MIPA in SMA Negeri 3 Purwokerto. The number of samples taken in this study is 72 i.e. 2 Class XI of MIPA which each class amounted to 36 students. Purposive Sampling Method used in the determination of the sample. Based on the results of the research and the anallisis data indicate that (1) there is a significant difference between the model of learning learning activeness cooperative Course Review Horay (CRH) and conventional learning model on economics. (2) there are significant differences between the learning outcomes learning model cooperative Course Review Horay (CRH) and conventional learning model on economi. (3) there is a positive influence learning model cooperative Course Review Horay (CRH) against the liveliness of the study on economic. (4) there is a positive influence learning model cooperative Course Review Horay (CRH) against the results of the study on economic. (5) there is no positive influence between the liveliness of student learning against the results of the study on economic. Penelitian ini adalah penelitian eksperimen pada siswa kelas XI MIPA di SMA Negeri 3 Purwokerto. Penelitian ini mengambil judul “Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe Course Review Horay (CRH) terhadap Keaktifan Belajar dan Hasil Belajar Ekonomi (Studi pada Siswa Kelas XI MIPA di SMA Negeri 3 Purwokerto)”.        Tujuan dari penelitian ini adalah untuk mengetahui perbedaan keaktifan belajar dan hasil belajar antara model pembelajaran Course Review Horay (CRH) dengan model pembelajaran konvensional, untuk mengetahui pengaruh model pembelajaran Course Review Horay (CRH) terhadap keaktifan belajar dan hasil belajar, serta untuk mengetahui pengaruh keaktifan belajar terhadap hasil belajar. Populasi penelitian ini adalah siswa kelas XI MIPA di SMA Negeri 3 Purwokerto. Jumlah sample yang diambil dalam penelitian ini adalah 72 yaitu 2 kelas XI MIPA yang masing-masing kelas berjumlah 36 siswa. Purposive Sampling Method digunakan dalam penentuan sample. Berdasarkan hasil penelitian dan anallisis data menunjukkan bahwa (1) Terdapat perbedaan signifikan keaktifan belajar antara model pembelajaran kooperatif Course Review Horay (CRH) dengan model pembelajaran konvensional pada mata pelajaran ekonomi. (2) Terdapat perbedaan signifikan hasil belajar antara model pembelajaran kooperatif Course Review Horay (CRH)  dengan model pembelajaran konvensional pada mata pelajaran ekonomi. (3) Terdapat pengaruh positif model pembelajaran kooperatif Course Review Horay (CRH)  terhadap keaktifan belajar pada mata pelajaran ekonomi. (4) Terdapat pengaruh positif model pembelajaran kooperatif Course Review Horay (CRH)  terhadap hasil belajar pada mata pelajaran ekonomi. (5) Tidak terdapat pengaruh positif antara keaktifan belajar siswa terhadap hasil belajar pada mata pelajaran ekonomi.  


2021 ◽  
Vol 17 (2) ◽  
pp. 77-89
Author(s):  
Jessico H Sermatang ◽  
Charlotha I Tupan ◽  
Laura Siahainenia

Seagrass as a flowering plant can live from muddy substrates to coral fractures. Differences in the characteristics of substrate type, nutrient content and aquatic environmental conditions can affect morphometric seagrass. The purpose of the study was to analyze environmental conditions and nutrient content as well as the morphometric characteristics of T. hemprichii seagrass based on differences in substrate type. This study was conducted in the waters of Tanjung Tiram Coastal, Poka from February-April 2021. Seagrass sampling was using the purposive sampling method. Data analysis was conducted using ANOVA with SPSS. The results of environmental parameters analysis showed that the water conditions of Tanjung Tiram, Poka are still at the tolerance limit intended for seagrass life. The substrate consists of sand substrate, gravel mixed sand substrate and mud substrate. The results of ANOVA showed that there was a significant difference in the content of sedimentary nutrients, especially phosphates in each substrate type and there was a significant difference in morphometric seagrass based on differences in substrate type and nutrient content.   ABSTRAK Lamun sebagai tumbuhan berbunga dapat hidup mulai dari substrat berlumpur sampai dengan patahan karang. Perbedaan karakteristik jenis substrat, kandungan nutrien dan kondisi lingkungan perairan dapat mempengaruhi morfometrik lamun. Tujuan dari penelitian ini adalah menganalisis kondisi lingkungan dan kandungan nutrien serta karakteristik morfometrik lamun T. hemprichii berdasarkan perbedaan tipe substrat. Penelitian ini dilaksanakan di Perairan Pantai Tanjung Tiram, Poka pada Bulan Februari-April 2021. Pengambilan sampel lamun menggunakan metode purposive sampling. Analisis data menggunakan ANOVA dengan SPSS. Hasil analisis parameter lingkungan, menunjukan bahwa kondisi perairan Tanjung Tiram, Poka masih berada pada batas toleransi yang diperuntukan untuk kehidupan lamun. Substrat terdiri dari substrat pasir, pasir campur kerikil dan lumpur. Hasil anova menunjukan bahwa terdapat perbedaan kandungan nutrien sedimen khususnya fosfat secara signifikan pada masing masing tipe substrat dan terdapat perbedaan morfometrik lamun secara signifikan berdasarkan perbedaan tipe substrat dan kandungan nutrien. Kata Kunci: morfometrik, nutrien, substrat, Tanjung Tiram, Thalassia hemprichii


2020 ◽  
Vol 2 (2) ◽  
pp. 77
Author(s):  
Rega Permana ◽  
Nora Akbarsyah ◽  
Pringgo KDNY Putra ◽  
Aulia Andhikawati

The coral reef ecosystem is one of the typical tropical ecosystems with high biodiversity which has an important role both biologically, ecologically, physically as well as socially and economically. Several coral reef areas in Indonesia were reported to have suffered damage, not only due to climate change which has an impact on rising sea surface temperatures and ocean acidification but also due to anthropogenic factors and irresponsible management of marine tourism. This study aimed to analyze the condition of coral reefs based on covering in Pramuka Island, which is one of the famous tourist destinations in the Seribu Islands. The study was conducted using Line Intercept Transect (LIT) method at predetermined coordinate points. The results showed that the dominant coral reef life form was Acropora Submassive (ACS), namely 18.9%, and Acropora Branching (ACB) as much as 12.48%. Besides, the types of life forms found were coral foliase (9.42%), Miliepora Coral (9.2%), Coral Massive (4.8%), Acropora Encrustring (4.24%), and so on. Based on the results of this study, it can be concluded that the condition of coral reefs in Pramuka Island is still relatively good with a total coral cover percentage of 72.38%. Efforts to protect the coral reef ecosystem in this area need to be considered so that its condition can be maintained. 


2020 ◽  
Vol 9 (2) ◽  
pp. 597
Author(s):  
I Made Agus Putra Wijaya ◽  
I Made Artha Wibawa

The purpose of this study was to examine the effect of workload on burnout with work family conflict as a mediating variable on female employees at PT Bank BRI Denpasar Gajah Mada. In this study the determination of samples using Slovin formula with purposive sampling method, the sample used was female employees as many as 61 respondents, through path analysis techniques (path analysis). Based on the results of the analysis it can be seen that the workload has a positive and significant effect on burnout on female employees at PT Bank BRI Denpasar Gajah Mada. Workload has a positive and significant effect on work family conflict on female employees at PT Bank BRI Denpasar Gajah Mada. Work family conflict has a positive and significant effect on burnout in female employees at PT Bank BRI Denpasar Gajah Mada. Work family conflict mediates the positive effect of workload on burnout on female employees at PT Bank BRI Denpasar Gajah Mada. Keywords: workload, burnout, work family conflict


Pastura ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 10
Author(s):  
Endang Purbowati ◽  
Ikha Rahmawati ◽  
Edy Rianto

A survey study was carried out to investigate the kinds of forage and nutrient adequacy of Jawarandu goats in Brebes Regency, Central Java Province. The study was conducted in three sub-districts Tonjong, Bumiayu, and Paguyangan, involving 504 Jawarandu goats belonging to 45 farmers. Determination of the location, farmers and goat as samples was done by purposive sampling method. The results showed that feedstuffs of Jawarandu goat in Brebes Regency were Albasia (Albaziafalcataria), Mahogany (Swietenia mahogany), Suren (Toonasureni), Kaliandra (Calliandrahaematocephala), and Gamal (Glyricidiasepium). Nutrients consumed by Jawarandu goat in BrebesRgency exceeded the needs as recommended by Kearl (1982). It suggested that Jawarandu goat farmers in Brebes Regency be given counseling/training on feeding management for feed utilization being more efficient.Key words: forage, Jawarandu goat, nutrient adequacy


Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4309
Author(s):  
Rongyong Huang ◽  
Huiya Zhang ◽  
Kefu Yu

Coral reefs are important as they can help to maintain ecological balance, biological resources, and species diversity on earth. However, they are globally threatened by human activities and climate change. As live coral cover (LCC) is regarded as an important measure of the health of coral reefs, analysis on LCC change associated with environmental parameters, such as chlorophyll-a concentration (Chl-a), sea surface temperature (SST), and photosynthetically active radiation (PAR), is of great value. Research on this front would help us comprehend the changes in coral reefs induced by human activities and global changes. Instead of using spasmodically in-field-measured environmental parameters, in this study, we chose to combine the successive Chl-a, SST, and PAR products of the Moderate Resolution Imaging Spectroradiometer (MODIS) with historic LCC records to establish an empirical relationship using nonlinear optimization. Thereafter, the established relationship was further used to discuss some possible developments of LCCs. According to the experiments, we concluded that the degradation of the LCC around Weizhou Island may be mainly caused by human-activity-caused eutrophication. Besides, we also showed that even if the Chl-a and the PAR can keep constant with current average levels, the corals around Weizhou Island may still be in a risk of disappearing between 2120–2140 as the SST continues to rise.


Author(s):  
Muhammad Amin

Market is a place for public facilities to complete the needs of the community and is a center for community commerce. Not only that, the market continues to play a role for price stability, where market value is one of the benchmarks for assessing inflation. The purpose of this study was to determine the income of vegetable traders in Aikmel Traditional Market, Aikmel District, East Lombok Regency and to find out the obstacles faced by vegetable traders in running their business at Aikmel Traditional Market, Aikmel District. The determination of the research area was carried out by purposive sampling, namely based on certain considerations in accordance with the research objectives. Considerations for choosing the Aikmel Traditional Market where the research was conducted, because the Aikmel Market is classified as the type of vegetables that are sold, it is very complete and the traders there pick them up quite close to the source of the farmers, besides that the Aikmel market provides comfort and peace when transacting. The sampling method is by using the census method.


2020 ◽  
Vol 9 (2) ◽  
pp. 119-130
Author(s):  
R. M. Rachmad Rizal Akbar ◽  
Winny Retna Melani ◽  
Tri Apriadi

ABSTRAK : Penentuan status mutu perairan perlu dilakukan sebagai acuan dalam melakukan pemantauan pencemaran kualitas air. Penelitian ini bertujuan untuk mengetahui tingkat pencemaran melalui nilai Indeks Pencemaran (IP) di perairan Muara Sungai Jodoh, Kota Batam. Lokasi pengambilan sampel berdasarkan metode purposive sampling di tujuh stasiun pada perairan Muara Sungai Jodoh Kelurahan Tanjung Uma Kota Batam. Parameter yang digunakan pada penelitian ini yaitu suhu, TSS, pH, DO, BOD, salinitas, dan bakteri coliform. Sebagai pembanding, digunakan baku mutu air laut untuk biota laut berdasarkan KEPMEN LH No.51 Tahun 2004. Perhitungan nilai IP dilakukan mengacu pada Keputusan Menteri Lingkungan Hidup Nomor 115 Tahun 2003 Tentang Penentuan Status Mutu Air. Berdasarkan hasil penelitian diketahui bahwa perairan muara Sungai Jodoh Kelurahan Tanjung Uma Kota Batam pada saat pasang maupun surut kualitas perairan tergolong tercemar ringan.  ABSTRACT : The determination of water quality status needs to be done as a reference to monitor water pollution. This study aimed to determine the level of pollutions through the level of Index Pollution (IP) in Jodoh River estuary, Tanjung Uma, Batam City . The location of sampling based on purposive sampling method of seven station in the waters of Jodoh River, Tanjung Uma, Batam City. Physical chemichal parameters used in this study were temperature, TSS, pH, DO, BOD, salinity and coliform bacteria. The water quality results were compared with water quality standards based on KEPMEN LH No.51 2004 for marine biotas. IP calculation was reference to the Minister of Environment No.115 2003 concerning on determination of water quality status. Based on the results of this study showed the estuary waters in the Jodoh River, Tanjung Uma, Batam City, when at high and low tide the water quality were slightly polluted.


2019 ◽  
Vol 11 (1) ◽  
pp. 65
Author(s):  
Aprillia Kartika Ekawati ◽  
Luky Adrianto ◽  
Zairion Zairion

Pesisir timur Lampung merupakan salah satu daerah penghasil rajungan di Indonesia. Jumlah hasil tangkapan yang rendah menghasilkan keuntungan yang rendah pada setiap upaya penangkapan. Tujuan dari penelitian ini adalah untuk menganalisis nilai aktivitas perikanan rajungan dalam bentuk trip optimal dan keuntungan untuk pengelolaan perikanan rajungan di pesisir timur Lampung. Pengumpulan data dilakukan dengan menggunakan metode purposive sampling. Karakteristik aktivitas penangkapan rajungan didapatkan jumlah kapal (40-250 unit) dan jumlah hari melaut (16-27 trip/bulan) pada setiap lokasi. Nilai produksi pada musim puncak di pendaratan rajungan Way Seputih dan Sungai Burung lebih tinggi dibandingkan 3 lokasi lainnya. Jumlah alokasi spasial tertinggi pada musim puncak di S1 adalah di Sungai Burung dengan jumlah 1974 trip/musim dan di strata 2 tertinggi di Kuala Penet dengan jumlah 2763 trip/musim. Musim sedang di S1 dan S2 tertinggi di Way Seputih 3540 trip/musim, dan Labuhan Maringgai 2883 trip/musim. Musim paceklik S1 dan S2 Sungai Burung 10088 trip/musim dan Kuala Penet 4708 trip/musim. Penetapan alokasi upaya penangkapan (trip/musim) dapat dijadikan acuan pembatasan upaya penangkapan rajungan pada setiap stratifikasi di 5 lokasi pendaratan rajungan.The eastern coast of Lampung is one of the blue swimming crabs (Portunus pelagicus) wild catch producing areas in Indonesia. Low catch weight causes a small profit to be gained on each fishing effort. Spatial allocation in fisheries seen from the location or distance and costs of activities. The purpose of this study was to analyze the value of BSC fishing activities in the form of optimal trips and benefits for the management of BSC fisheries on the east coast of Lampung. Data collection is done using purposive sampling method. Characteristics of BSC fishing activities obtained the number of ships (40-250 units) and number of days of fishing (16-27 trip/month) at each location. The production value in the peak season at the Way Seputih and Sungai Burung landings had a higher number compared to the catch per-trip in 3 other locations. The highest spatial allocation value in the peak season at S1 in the Sungai Burung with 1974 trips/season and the highest 2 in Kuala Penet with 2763 trips/season. The highest season in S1 and S2 is highest in Way Seputih 3540 trips/season, and Labuhan Maringgai is 2883 trips/season. Famine season in S1 and S2 is highest in Sungai Burung as many 10088 trips/season and Kuala Penet 4708 trips/season. Determination of alocation for fishing effort (trip/season) can be used as a reference for limiting the effort to catch of BSC in each stratification in 5 crab landing sites.


e-GIGI ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Cliviane Kewas ◽  
Dinar A. Wicaksono ◽  
Paulina N. Gunawan

Abstract: Dental caries can be overcome by restoration using composite resin which is widely used as an anterior tooth restoration material due to its aesthetic advantages. Dentists have to fulfil the patient expectation with the best service as possible. Determination of patient satisfaction of the restoration can be evaluated from the patient's assessment. This study was aimed to determine the level of patient satisfaction of composite restoration in the anterior teeth at RSGM Unsrat. This was a descriptive study with a cross-sectional design. Respondents were 30 patients selected by purposive sampling method. The instrument used in this study was a questionnaire with closed questions. The results showed that most respondents’ satisfaction level of the restoration was ‘very satisfying’ (45%). The satisfaction level of the composite color was ‘satisfying enough’ (33%). The satisfaction level of the tooth size was ‘satisfying’. Data were processed descriptively then were presented based on distribution in chart forms. In conclusion, the respondents' satisfaction level of the composite restoration in the anterior teeth was most dominant in the 'satisfying' category related to the tooth size after restoration but in the 'satisfying enough' category related to the composite color.Keywords: composite restoration, anterior teeth, patient satisfaction Abstrak: Karies gigi dapat diatasi dengan restorasi menggunakan resin komposit yang banyak digunakan sebagai bahan restorasi gigi anterior karena memiliki keunggulan estetik yaitu menyerupai warna gigi. Dokter gigi wajib memenuhi harapan pasien dengan pelayanan sebaik mungkin. Untuk mengetahui kepuasan pasien terhadap hasil restorasi, dapat dilihat dari penilaian pasien. Tujuan penelitian ini yaitu untuk mengetahui tingkat kepuasan pasien terhadap perawatan tumpatan komposit pada gigi anterior di RSGM Unsrat. Jenis penelitian ialah deskriptif dengan desain potong lintang. Responden penelitian ialah pasien yang dipilih dengan metode purposive sampling sebanyak 30 orang. Instrumen penelitian yang digunakan yaitu kuesioner dengan pertanyaan tertutup. Data diolah secara deskriptif kemudian disajikan berdasarkan distribusi dalam bentuk grafik. Hasil penelitian menunjukkan bahwa tingkat kepuasan responden terhadap hasil tumpatan paling banyak ialah sangat puas (45%) dan yang paling sedikit yaitu kurang puas (2%). Tingkat kepuasan responden terhadap warna bahan tumpatan komposit paling banyak ialah cukup puas (33%). Tingkat kepuasan responden terhadap ukuran gigi setelah ditumpat paling banyak ialah puas (76%). Simpulan penelitian ini ialah kepuasan responden terhadap perawatan tumpatan komposit pada gigi anterior yang paling dominan pada kategori puas tentang ukuran gigi setelah ditumpat dan pada kategori cukup puas tentang warna bahan tumpatan.Kata kunci: tumpatan komposit, gigi anterior, kepuasan pasien


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