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All Journal JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati TARBIYA : Journal Education in Muslim Society Natural B Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Jurnal Pengabdian Magister Pendidikan IPA Jurnal Ilmiah Profesi Pendidikan Journal of Classroom Action Research Jurnal Pijar MIPA Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Makara Human Behavior Studies in Asia Jurnal Pendidikan dan Pengabdian Masyarakat Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Imam Bachtiar
Program Studi Pendidikan Biologi FKIP Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Other

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Reproduksi Seksual Karang Scleractinia: Telaah Pustaka Bachtiar, Imam
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 8, No 3 (2003): October 2003
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.149 KB) | DOI: 10.24002/biota.v8i3.2856

Abstract

There has been a revolutioner development in our understanding about coral reproduction in the middle of 1980s. All publication, before this period, therefore provides incomplete facts and wrong conclusions about the modes of coral reproduction. Most corals are hermaphodite and broadcast spawners, in which fertilization takes place externally. Temperature, photoperiod, lunar and tidal cycles are thought to be major environmental factors influencing reproductive cycle in corals. In Indonesia, sexual pattern of scleractinian corals consistent with previously reported data from other regions. Available data show that multispecific spawning may occurs in Indonesia. There are also some evidences that there is variation in spawning season between corals in Lombok and Karimunjawa Islands.
Printed-Book Reading Habits of Pre-Service Science-Teacher Students Imam Bachtiar
TARBIYA: Journal of Education in Muslim Society TARBIYA: JOURNAL OF EDUCATION IN MUSLIM SOCIETY | VOL. 7 NO. 2 2020
Publisher : Faculty of Educational Sciences, Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/tjems.v7i2.16888

Abstract

AbstractMany studies reported that reading can improve academic achievements, critical thinking skills, confidence, social behavior, and all characters required by students to get a better job and better life. In the Disruption Era, however, many students are potentially disrupted by social media interactions that affected their reading habits. The present study was aimed to explore the reading habits of students in the printed textbook. The study was carried out in 2019, involving 469 students from three study programs of the Department of Mathematics and Science Education, i.e. Biology Education, Chemistry Education, and Physics Education. Data were collected using questionnaires in a convenience sampling method with a sample of about 70% of the population. Results show that 81% of students read printed textbooks two hours or less per day, and 53% spend less than one hour. There are a few students, however, who read textbooks more than four hours per day. Students' visit to the library is mostly (35%) 3-4 times per year and >5 times per year (33%). Reading for leisure is not very popular among the students. Multiple regression models showed that students' science textbooks, students' interest in information technology books, the number of literature read, and the number of bought-books significantly determine the duration of students' reading time. Potential methods to improve students' reading habits are discussed.AbstrakBanyak penelitian sudah melaporkan bahwa membaca dapat meningkatkan kemampuan akademis, ketrampilan berfikir kritis, perilaku sosial, dan semua karakter yang diperlukan mehasiswa untuk memperoleh pekerjaan yang bagus dan kehidupan yang lebih baik. Pada Era Disrupsi sekarang ini, banyak mahasiswa yang berpotensi terganggu oleh media interaksi sosial yang dapat mengganggu kebiasaan membaca mereka. Penelitian ini bertujuan untuk mengeksplorasi kebiasaan membaca buku teks cetakan pada mahasiswa. Penelitian dilakukan pada tahun 2019, yang melibatkan 469 mahasiswa sebagai sampel dari tiga program studi di Jurusan Pendidikan Matematika dan IPA, yaitu Pendidikan Biologi, Pendidikan Kimia, dan Pendidikan Fisika. Pengumpulan data dilakukan melalui kuesioner dengan metode convinience sampling, dengan jumlah sampel sekitar 70% dari populasi. Hasil penelitian mengungkapkan bahwa 81% mahasiswa membaca buku cetakan dua jam atau kurang per hari, dan 53% membaca kurang dari satu jam per hari. Sebagian kecil mahasiswa mengaku membaca buku cetakan lebih dari empat jam per hari. Kunjungan mahasiswa ke perpustakaan umumnya 3-4 kali per semester (35%) dan >5 kali per semester (33%). Kegiatan membaca untuk hiburan tidak populer pada mahasiswa. Model regresi berganda menunjukkan bahwa minat mahasiswa terhadap buku sains, minat mahasiswa terhadap buku teknologi informasi, jumlah buku sastra yang dibaca, dan jumlah buku yang dibeli mahasiswa, merupakan empat variabel yang dapat memprediksi lama waktu membaca mahasiswa. Cara-cara yang potensial untuk meningkatkan kebiasaan membaca mahasiswa didiskusikan.
Plankton Community at Segara Anak Lake Gunung Rinjani National Park Taufik Arianto; Imam Bachtiar; Lalu Japa
Natural B, Journal of Health and Environmental Sciences Vol 3, No 1 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.825 KB) | DOI: 10.21776/ub.natural-b.2015.003.01.10

Abstract

Plankton community was studied at the Lake of Segara Anak, Lombok Island, Indonesia. The purpose of this study was to describe community structure of plankton and to explore spatial and temporal pattern. The results show there were 39 species of phytoplankton and 5 species of zooplankton. Species diversity and similarity indices of phytoplankton were 3.064 and 0.029 respectively, while the species diversity and similarity indices of zooplankton were 1.352 and 0.060 respectively. Statistical analysis showed no significant difference spatially and temporally on the species richness, abundance, diversity index and similarity index of zooplankton and phytoplankton. Significant difference was only found on the average of species richnes and diversity index of zooplankton between the surface and the bottom of the lake. 
Triterpenoid Fraction Antimalarial Activity Test from Methanol Extract Made by Leaf Artocarpus camansi Against Plasmodium Berghei by In Vivo Ramadhani Sucilestari; Dwi Soelistya D J; Imam Bachtiar
Natural B, Journal of Health and Environmental Sciences Vol 2, No 2 (2013)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1365.04 KB) | DOI: 10.21776/ub.natural-b.2013.002.02.16

Abstract

Malaria disease is still a serious health problem in Indonesia. This study aimed to determine the antimalarial activity of triterpenoid compound fraction of A. camansi leaf methanol extract to P. berghei of in vivo. This experiment of using research a completely randomize design (CRD) with four different doses (0.1 mg/kg BW, 1 mg/kg BW, 10 mg/kg BW, 100 mg/kg BW) and one negative control group (1 % CMC). The results show that triterpenoid compound fraction of A. camansi leaf methanol extract was effective to reduce parasite activity of P. berghei. The most effective dose was 100 mg/kg BW for three days with daily treatment after the mice was infected by parasite.
CORAL RECRUITMENT ON REEF BALLTM MODULES AT THE BENETE BAY, SUMBAWA ISLAND, INDONESIA Imam Bachtiar; Windy Prayoga
JOURNAL OF COASTAL DEVELOPMENT Vol 13, No 2 (2010): Volume 13, number 2, Year 2010
Publisher : JOURNAL OF COASTAL DEVELOPMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.173 KB)

Abstract

Reef BallTM structure is a popular artificial reef module that has been invested in many countries. Publication on its efficacy in promoting coral recruitment however remains lack of study or publication. This present study was aimed to examine the pattern of coral recruitment on reef ball structure at the Benete Bay of Sumbawa Island, Indonesia. Thirty reef-balls (dome shape; 0.90 cm height, 1.20 cm diameter) were monitored after three years of deployment. The results of this study showed that nearly all coral colonies grew on the outer vertical surface and upper side of the reef balls. The recruit number varied a lot between 1-76 colonies per module. Most recruits were belonged to the Family Acroporidae, which contributed approximately 76 percent to the whole recruitment (640 colonies). Branching acroporiid was the most abundant colonies (55%). Pocilloporidae and Faviidae both contributed approximately nine percent to the total recruitment, while Poritidae contributed about three percent. Other coral families only had <1% contribution. The diameter of coral colonies which were growing on the reef balls varied between 5-290 mm. The number of recruit on the ball was very low at 10 meter depth (1-5 colonies per ball) that was likely to be affected by sedimentation. This study showed that reef ball module can be effectively used as a method in rehabilitating damaged coral reefs, and developing a proto-reef.    
ASSESSING ECOLOGICAL RESILIENCE OF INDONESIAN CORAL REEFS Imam Bachtiar; Ario Damar; Suharsono .; Neviaty P. Zamani
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 3 (2011): Volume 14, Number 3, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.698 KB)

Abstract

Ecological resilience is an important property of natural ecosystem to be understood in coral reef management. Resilience of Indonesian coral reefs was assessed using 2009 COREMAP data. The assessment used 698 data of line intercept transects collected from 15 districts and 4 marine physiographies. Resilience index used in the assessment was developed by the authors but will be published elsewhere. The results showed that coral reefs at western region had higher average resilience indices than eastern region, and Sunda Shelf reefs had higher resilience indices than coral reefs at Indian Ocean, Sulawesi-Flores, or Sahul Shelf. Four districts were found to have coral reefs with highest resilience indices, i.e. Bintan and Natuna (western region), and Wakatobi and Buton (eastern region). Raja Ampat had coral reefs with lower average resilience indices than that of Wakatobi. Uses of resilience index in coral reef management should be coupled with other information such as maximum depth of coral communities.  
Rekruitmen Karang Scleractinia di Perairan Pulau Lembata (Recruitment of Scleractinian Corals at Lembata Island Waters) Imam Bachtiar; Muhammad Abrar; Agus Budiyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 1 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.958 KB) | DOI: 10.14710/ik.ijms.17.1.1-7

Abstract

Potensi rekruitmen karang sangat penting di dalam pengelolaan terumbu karang, karena potensi pemulihan terumbu karang tergantung pada rekruitmen karang. Penelitian rekruitmen karang Scleractinia dilakukan di perairan Pulau Lembata, Nusa Tenggara Timur, pada bulan Juli 2011. Penelitian ini bertujuan untuk mengetahui keanekaragaman dan kelimpahan rekruit (anakan) karang. Hasil penelitian menunjukkan bahwa Acroporidae, Pocilloporidae, dan Poritidae merupakan tiga famili karang yang mempunyai kontribusi terbesar pada rekruitmen karang di perairan Lembata. Komposisi genus karang pada stasiun penelitian di Laut Flores (Pulau Lapan, Pulau Watupeni, Pulau Wuku) berbeda dari komposisi genus karang di stasiun perairan selat sekitar Pulau Lembata dan Laut Sawu. Ketiga stasiun penelitian di Laut Flores juga mempunyai kelimpahan rekruit yang lebih tinggi dari lokasi lainnya.   Kata kunci: karang, rekruitmen, Lembata, komposisi, kelimpahan Potential recruitment of Scleractinian corals is very important in coral reef management, since coral reef recovery is very dependent on coral recruitment. Study on coral recruitment was conducted in Pulau Lembata waters, Nusa Tenggara Timur, on July 2011. Objectives of the study were to determine taxa (family and genera) diversity and abundance of coral recruits. Results showed that coral families of Acroporidae, Pocilloporidae, and Poritidae had highest contribution to the whole coral recruitment. Study locations in the Flores Sea (Pulau Lapan, Pulau Watupeni, Pulau Wuku) showed genera composition that is different from other study locations. The three islands in the Flores Sea also had significantly higher recruit abundance than those in other locations. Key words: coral, recruitment, Lembata, composition, abundance
Struktur Komunitas dan Penyakit Pada Karang (Scleractinia) di Perairan Lembata, Nusa Tenggara Timur (Community Structure and Disease in Corals (Scleractinian) in the Waters of Lembata, East Nusa Tenggara) Muhammad Abrar; Imam Bachtiar; Agus Budiyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 2 (2012): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.202 KB) | DOI: 10.14710/ik.ijms.17.2.109-118

Abstract

Infeksi penyakit pada karang telah menjadi faktor utama memperburuk kondisi terumbu karang dan memberikan dampak terhadap perubahan komunitas karang. Penelitian struktur komunitas dan jenis penyakit karang telah dilakukan pada 2 lokasi (8 stasiun) di Perairan Lembata, Nusa Tenggara Timur. Struktur komunitas meliputi sebaran dan keanekaragaman karang dilakukan dengan cara mencacah langsung menggunakan peralatan SCUBA, sedangkan tutupan bentik terumbu dilakukan dengan metode Line Intercept Transect (LIT) modifikasi panjang 10 meter dengan tiga kali ulangan. Serangan penyakit meliputi jenis dan prevalensi penyakit dilakukan dengan menggunakan metode bentik belt transek ukuran 2x10 meter sebanyak 3 kali ulangan. Total kekayaan jenis cukup tinggi mencapai 313 jenis dari 18 famili didominasi oleh karang dari Acroporidae dan Faviidae. Sebaran dan jumlah jenis karang pada bagian Timur lebih tinggi dibanding bagian Barat dan semakin berkurang ke arah Selatan. Ditemukan 14 jenis infeksi penyakit dan gangguan kesehatan pada karang dengan prevalensi berkisar 3-41,9%. Prevalensi penyakit lebih tinggi pada bagian Timur yaitu dalam teluk dan dekat dengan daratan. Ancaman serangan penyakit dan gangguan kesehatan terhadap karang termasuk dalam kategori rendah, namun menunjukan pengaruh yang signifikan pada lokasi tertentu. Kata kunci: karang, struktur komunitas, penyakit karang, Perairan Lembata Coral disease are one of main factors contributing to the global deterioration of coral reefs. The Study of coral community and disease infection were conducted at Lembata Island, Nusa Tenggara Timur. Coral community included both distribution and diversity were inventory by SCUBA, while reef bentic communities used Line Intercept Transect Method, 10 meter length modification with three replicate on 5 meter depth. Disease infection and prevalence were conducted by Bentic Belt T ransect, 2x10 meter size with three replicate. A total of species very high to reach 313 species from 18 families dominated by Acroporidae and Faviidae. Coral distribution and species number highest at Eastern of Lembata were compared than its western side and decreased toward Southern of Lembata. There were founded 14 corals disease infection and loss health with disease prevalence 3% to 41,9% and they were highest at Western of Lembata. Threat of disease infection on corals is still low category, but its significant impact on area in local scale. Key words: coral, structure community, coral disease, Lembata Waters
Revisiting the Spawning Pattern of Nyale Worms (Eunicidae) Using the Metonic Cycle Imam Bachtiar; Shingo Odani
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 26, No 2 (2021): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.26.2.87-94

Abstract

Mass spawning dates of nyale worms (Eunicidae) have been scientifically predictable since 2019. The month of spawning is consistently following the pattern of the February full moon, while the date of spawning is consistently on the 20th of the lunar calendar. There are particular years with February only spawning, March only spawning, and split spawning in both February and March. The existing prediction of the split spawning, however, was constructed with very little available data. The present study aimed to revisit the split spawning prediction using the Metonic cycle, a 19-year lunisolar cycle. The results show that the spawning prediction very much follows the Metonic Cycle. There are minor dates on split spawning to be revised, when February full moon rises on 14th February. The revised hypothesis is that split spawning is very likely to occur when the full moon rises between the 7th to 13th of February. When February full moon appears before the 7th of February, single spawning will take place on the fifth day after the March full moon.  When February full moon befalls after the 13th of February, single spawning will occur on the fifth day after the February full moon. The revised prediction method has only 2 (two) deviances in 114 years of simulation dates. The present study is the first to suggest the link between Polychaete spawning patterns and the Metonic Cycle.
Reproduksi Seksual Karang Scleractinia: Telaah Pustaka Imam Bachtiar
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 8, No 3 (2003): October 2003
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v8i3.2856

Abstract

There has been a revolutioner development in our understanding about coral reproduction in the middle of 1980s. All publication, before this period, therefore provides incomplete facts and wrong conclusions about the modes of coral reproduction. Most corals are hermaphodite and broadcast spawners, in which fertilization takes place externally. Temperature, photoperiod, lunar and tidal cycles are thought to be major environmental factors influencing reproductive cycle in corals. In Indonesia, sexual pattern of scleractinian corals consistent with previously reported data from other regions. Available data show that multispecific spawning may occurs in Indonesia. There are also some evidences that there is variation in spawning season between corals in Lombok and Karimunjawa Islands.
Co-Authors A Wahab Jufri A Wahab Jufri A Wahab Jufri A. Wahab Jufri A. Wahab Jufri A. Wahab Jufri AA Sukarso Adinda Putriningtyas Agil Al Idrus Agus Budiyanto Agus Budiyanto Agus Ramdani Agus Ramdani Agus Ramdani Ahmad Raksun Aliefman Hakim Anak Agung Gede Sugianthara Ani Mariani AR Syachruddin Ayudya Lestari Baiq Sri Handayani Dadi Setiadi Dadi Setiadi Damar, Ario Dewa Ayu Citra Rasmi Dewi Oktarini Dewi Oktarini Didik Santoso DIDIK SANTOSO Dwi Soelistya D J Dwi Soelistya Dyah Jekti Fenysia Alfiana G. Gunawan, G. Gito Hadiprayitno Gunawan Gunawan I Wayan Merta I Wayan Merta Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jamaluddin Karnan Karnan Karnan Kosim . Kusmiyati Kusmiyati Kusmiyati Kusmiyati Laila Nurul Safitri Lalu Japa Lalu Japa Lalu Japa Lalu Japa Lalu Zulkifli Lilik Muliani Linda Lestari Lulu Febrianti Mariani, Ani Maspan Hariyati Muchlis Muhammad Abrar Muhammad Abrar Muhlis Muhlis Muhlis Muhlis Muhlis Mukhlis Mukhlis Neviaty P Zamani Prapti Sedijani Prapti Sedijani Putri Devi Fitriati Ramadhani Sucilestari Shingo Odani Siti Nurhaliza Siti Syifa’un Nufus Suharsono . Susilawati Susilawati Syachruddin AR Syachruddin AR Syamsul Bahri Syamsul Bahri Taufik Arianto Tri Ayu Lestari Wayan Merta Wildan Wildan Windy Prayoga Yumna Juita Haris Zikriah Zikriah