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All Journal Buletin PSP JURNAL PIJAR Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Albacore : Jurnal Penelitian Perikanan Laut Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Pengabdian Magister Pendidikan IPA Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Jurnal Ilmiah Profesi Pendidikan Journal of Classroom Action Research Jurnal Inovasi Pendidikan dan Sains Bioscientist : Jurnal Ilmiah Biologi Jurnal Pijar MIPA Jurnal Pendidikan dan Pengabdian Masyarakat International Journal of Science Education and Science
Karnan Karnan
Pendidikan Biologi FKIP Universitas Mataram
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Aspek Reproduksi Rajungan (Portunus Pelagicus) Yang Didaratkan Di Pesisir Ujung Pantai Selatan Lombok Timur Lisnawati Lisnawati; Karnan Karnan; Abdul Syukur
Jurnal Penelitian Pendidikan IPA Vol 10 No 10 (2024): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i10.9097

Abstract

This study aims to describe aspects of the reproductive biology of a blue swimming crab (Portunus pelagicus) that landed at the southern end of the coast of East Lombok during the period November 2023 to April 2024. The study used a descriptive design with a quantitative approach to measure and analyze data through direct observation. Data included carapace width, body weight, gonad maturity stages, and gonad somatic index (GSI) of P.pelagicus. The results showed that the male P.pelagicus population was more dominant than females every month. P.pelagicus body weight varied, with significant increases in certain months caused by spawning. Analysis of the relationship between carapace width and body weight showed positive allometric growth, with b values of 3.17 for males and 3.10 for females, indicating that body weight gain was faster than carapace width. The maturity stages of the P.pelagicus gonads were mostly at stages I and II, with a few reaching stages III and IV. The average gonad maturity stages increased from 2.42% in November to a peak of 5,83 % in February, then decreased in the following months. The primary spawning time occurs from December to February, characterized by changes in gonad color and a decrease in the body weight of the P. pelagicus after spawning. Hopefully, this study’s results can positively contribute to the sustainable management of crabs (P. pelagicus).
Sediment Carbon Stocks and CO₂ Sequestration Capacity in the Bagek Kembar Mangrove Essential Ecosystem Area, West Lombok Eni Suyantri; Gito Hadiprayitno; Didik Santoso; Karnan; M. Liwa Ilhamdi; Pahrurrozi
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 2 (2026): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i2.19485

Abstract

This study aimed to analyze and compare sediment organic carbon stocks, bulk density, and estimated carbon dioxide (CO₂) sequestration in natural and revegetated mangrove areas within the Bagek Kembar Mangrove Essential Ecosystem Area (KEE), Sekotong, West Lombok. Sediment samples were collected to a depth of 100 cm and analyzed using the Loss on Ignition (LOI) method. The results showed that bulk density ranged from 1.19 to 1.50 g/cm³ and tended to decrease with increasing sediment depth. Sediment organic carbon stocks were higher in the natural mangrove area (591.49 Mg C/ha) than in the revegetated mangrove area (575.39 Mg C/ha), with the greatest carbon accumulation observed at depths of 61–100 cm. This difference indicates that natural mangroves have a slightly greater capacity for carbon accumulation than revegetated areas, likely due to more stable stand structure and sediment dynamics. Estimated CO₂ sequestration followed a similar pattern, reaching 2,170.55 Mg CO₂/ha in the natural mangrove area and 2,111.68 Mg CO₂/ha in the revegetated mangrove area. These findings provide a scientific contribution by addressing data gaps on sediment organic carbon stocks and estimated CO₂ sequestration in mangrove ecosystems in Lombok. They also strengthen the basis for conservation- and restoration-oriented management to support climate change mitigation in coastal ecosystems.
Penguatan Kapasitas Pokdarwis untuk Pengembangan Atraksi Eduwisata Budidaya Kepiting Bakau di Ekowisata Mangrove Bagek Kembar, Lombok Barat Abdul Syukur; Karnan; Lalu Zulkifli; Didik Santoso; X Zardht Alex Hidayat; Arinal Hidayati; Lalu Muh. Sofyan Hadinata; Laela Salsa A; Laela Innaza
Jurnal Pengabdian Magister Pendidikan IPA Vol 9 No 2 (2026): April-Juni 2026
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v9i2.13991

Abstract

Ekowisata Mangrove Bagek Kembar di Desa Cendi Manik, Sekotong, merupakan kawasan pesisir yang memiliki nilai strategis sebagai ruang konservasi, pembelajaran lingkungan, serta penguatan ekonomi masyarakat berbasis wisata. Kegiatan pengabdian ini bertujuan untuk memperkuat kapasitas pokdarwis dalam pengembangan atraksi eduwisata budidaya kepiting bakau di Ekowisata Mangrove Bagek Kembar, Cendi Manik, Lombok Barat. Metode pelaksanaan memadukan sosialisasi partisipatif dan focus group discussion (FGD). Peserta kegiatan berasal dari unsur pengelola ekowisata, perangkat desa, masyarakat lokal, pelaku usaha, perwakilan sekolah, serta pemangku kepentingan terkait. Materi kegiatan mencakup prinsip silvofishery, teknik dasar budidaya kepiting bakau, penyusunan paket eduwisata, pemanduan interpretatif, serta promosi digital destinasi. Hasil kegiatan menunjukkan terbentuknya pemahaman awal mengenai hubungan antara konservasi mangrove, budidaya kepiting bakau, dan pengembangan produk wisata edukatif. FGD menghasilkan empat rumusan operasional, yaitu penguatan literasi budidaya, penyusunan alur atraksi, penyusunan SOP pemanduan, serta agenda demonstrasi lapang dan promosi digital. Kegiatan ini menjadi dasar operasional bagi pendampingan lanjutan yang lebih teknis, terukur, dan berorientasi pada keberlanjutan ekowisata mangrove berbasis masyarakat.
Morphometric And Meristic Aspects of Lemuru Fish (Sardinella lemuru) Landed on Pancer Beach Banyuwangi Dea Yolanda Aulia Rida; Karnan Karnan; Didik Santoso
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11364

Abstract

Lemuru fish (Sardinella lemuru) is the main small pelagic commodity in the Bali Strait that has high economic value but is vulnerable to pressure on the surface. This study aims to analyze the morphometric and meristic characteristics of lemuru fish landed on Pancer beach, Banyuwangi. The research method used a descriptive survey with stratified random sampling techniques of 50 individuals in the period from October to December 2022.  The results of measurements on 23 morphometric variables showed that the total length was 9 ≤ 19 cm (92%), the standard length was 7 ≤ 17 cm (86%), the body width was 1 ≤ 11 cm (90%), the height of the body was 2 ≤ 10 cm (88%), the height of the tail rod was 1 ≤ 9 cm (84%), the length of the tail rod was 1 ≤ 9 cm (96%), the length of the ventral fin was 1 ≤ 9 cm (90%),  Pectoral fin length 1 ≤ 13 cm (98%), Eye diameter 1 ≤ 9 cm (90%) and weight 10 ≤ 24 g (98%). Meanwhile, the calculation of 14 meristic variables of lemuru fish showed that: Number of Hard Dorsal Radius 2 ≤ 12 (88%), Number of Weak Dorsal Radius 3 ≤ 13 (96%), Number of Hard Anal Fin Fingers 2 ≤ 6 (86%), Number of Weak Anal Fin Fingers 2 ≤ 8 (88%), Number of Scales on Lateral Stripes 54 ≤ 67 (78%), Number of Scales Around the Body 33 ≤ 41 (60%), Number of Scales on Side Lines 5 ≤ 17 (94%),  The number of scales below the side line is 10 ≤ 20 (94%).
Morphometrics of Swimming Crabs (Portunus pelagicus) in Lombok Waters Lilik Supiani; Karnan Karnan; Mohammad Liwa Ilhamdi
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11685

Abstract

Crab catches that do not meet standards have the potential to disrupt the population structure and reduce the size of the catch, so morphometric information is important as a basis for sustainable management and utilization; moreover, in Lombok waters, morphometric reference data is declared unavailable, while regulations also stipulate a prohibition on catching females laying eggs and the size of the carapace width is suitable for catching >10 cm. This study aims to analyze the morphometric characteristics of Portunus pelagicus crabs landed in Teluk Ujung (n=75) using a descriptive-exploratory approach to describe the size distribution. The results showed that harvested swimming crabs had weight range of 47-87 g (60%), a carapace width of 10-11 cm (24%), a total carapace width of 13–14 cm (19%), and a carapace length of 6-7 cm (27%). The parameters of the appendix also vary, including the width of the claw prop 2-3 cm (74%), the length of the prop 10-11 cm (15%), the height of the propous 1-2 cm (57%), the length of the claw dactylus 4-5 cm (29%), the width of the claw of 1-2 cm (57%), the length of the claw of 5-6 cm (29%), the width of the 4th leg of the claw 0.5-1 cm (74%), the length of the 4th leg of the claw 2-3 cm (50%), the width of the dactylus of the swimming leg 1-2 cm (72%),  Length of the dactylus of the swim leg 2-3 cm (73%), the width of the abdomen 1-2 cm (41%), the length of the telson 0.5-1 cm (59%). These findings present size profiles as basic data on local stocks as well as enrichment materials for zoology learning, and can be used to strengthen more selective fishing practices and are in line with the provisions of catchable size.
Microplastic Analysis in Digestive Tracts of Baronang and Goatfish in Kuta Lombok Jasanti, Ninsanti Aura; Zulkifli, Lalu; Bahri, Syamsul; Karnan, Karnan
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i2.12147

Abstract

Microplastic pollution has become a significant environmental problem in marine ecosystems, particularly in coastal areas impacted by increased anthropogenic activity. The coastal waters of Kuta, Lombok, are potentially exposed to plastic waste from tourism and fisheries, which can degrade into microplastics and enter the marine food chain. This study aims to identify the types, abundance, and characteristics of microplastics in the digestive tracts of rabbitfish (Siganus canaliculatus) and goatfish (Parupeneus multifasciatus). The study used a modified NOAA method for 60 fish samples, including hydrogen peroxide (H₂O₂) digestion and NaCl density separation, followed by microscopic observation. The results showed that microplastics were present in both fish species, consisting of fiber and fragment types, with fibers being the dominant type. Microplastic abundance was relatively low, at 0.6 particles/individual in rabbitfish and 0.5 particles/individual in goatfish. The dominant colors observed were black, blue, and red. These findings indicate that microplastic contamination has occurred in the study area, albeit at a relatively low level. Therefore, better plastic waste management and increased public awareness are recommended to reduce further contamination in coastal ecosystems.
Microplastic Abundance and Characteristics in Digestive Tract of Fish Tongkol Euthynnus affinis from Coastal Area of Ampenan, Mataram Zoelvianti, Oktry; Zulkifli, Lalu; Syukur, Abdul; Karnan, Karnan
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i2.12148

Abstract

The rise in plastic usage in Indonesia has resulted in a buildup of plastic waste both on land and in water bodies. Because it does not break down easily due to the lack of microorganisms that can degrade it, plastic remains in the environment and pollutes various living beings. Thus, it is important to conduct studies on microplastic contamination to evaluate the safety of fish, which is a widely eaten source of food. This study aimed to determine the abundance and characteristics of microplastics in Ikan Tongkol (Euthynnus affinis) from the coastal waters of Ampenan Beach. Sampling was conducted using a random sampling method. Tuna samples were collected from fishermen along the Ampenan coast three times, totaling 30 fish. The analysis was conducted through sample preparation, oxidation of organic matter, filtration, and microscopic observation. The results showed that microplastics had accumulated in the digestive tract of the Euthynnus affinis, with an abundance of 2.3 MP/Ind. The most dominant type of microplastic found was fiber, accounting for 65% of the total sample, with black being the predominant color. Four types of microplastics were identified in the digestive tract: 65% fiber, 20% fragments, 10% film, and 5% granules.
Community Structure of Phytoplankton as Bioindicators of Water Quality in Kuwang Wae Coastal Waters, East Lombok, Indonesia Baiq Maria Ulfa; Karnan Karnan; Lalu Japa
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.12848

Abstract

Phytoplankton play a crucial role as a primary producer in aquatic ecosystems and can be used as a bioindicator to assess water quality. Aquaculture activities in coastal areas have the potential to alter the phytoplankton community structure through changes in the physical, chemical, and biological characteristics of the aquatic environment. This study aimed to analyze the composition, abundance, community structure, and role of phytoplankton as a bioindicator of water quality in Kuwang Wae Coastal Waters, East Lombok Regency. A descriptive-exploratory method with purposive sampling was employed at three observation stations, namely the pond outlet, transition zone, and reference area. The observed parameters included species composition, abundance, diversity index, evenness index, dominance index, importance value, and water quality parameters. The reserch identified 72 species of phytoplankton belonging to five divisions: Chrysophyta, Dinophyta, Cyanophyta, Chlorophyta, and Euglenophyta. The species with the highest importance values were Gonyaulax spinifera, Bacteriastrum biconicum, Melosira sp., Chaetoceros brevis, and Bacteriastrum elongatum.  The average phytoplankton abundance was 1,614 ind/L, with variations among observation stations. The species diversity index ranged from 2.318 to 2.813, the species evenness index from 0.686 to 0.709, and the species dominance index from 0.130 to 0.174. Water quality of  Kuwang Wae Beach is still in relatively good, stable condition, and has not experienced significant ecological pressures. The results of this study are expected to provide baseline information for sustainable management, conservation, and monitoring of coastal water quality.
Co-Authors A. Wahab Jufri A. Wahyuli A.A. Ketut Agung Cahyawan W Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Abdul Syukur Agil Al Idrus Agil Al Idrus Ahmad Raksun Ahmad Raksun Ahmad Raksun Ahmad Raksun Ahmad Raksun Ahmad Raksun, Ahmad Alawiyah, Rita Aldri Frinaldi Alpiansah, Hairul Arif Safrillah Arinal Hidayati Azfani, Lalu Ahmad Azizah, Norma B. A. Janiarti Baiq Diana Safitri Baiq Maria Ulfa Baiq Sri Handayani Baiq Sri Handayani Baiq Sri Handayani Budhi H. Iskandar Bukhari Abdillah Chatarina Umbul Wahyuni Dadi Setiadi Dea Yolanda Aulia Rida Dianam DIDIK SANTOSO Didik Santoso Didik Santoso Diniah, Siti Eliyan Irmasari Eni Suyantri Ernani Lubis F. F. F. Putri Fahira Putri Utami Fariah, Lailatul Fitriyani Fitriyani Gede Mertha Gito Hadiprayitno Gito Hadiprayitno Gito Hadiprayitno Gito Hadiprayitno Gusfina, Omira Calia Habibah Hafizatil Adni Handayani, Sri Hilmi, Masnayati Husain, Pahmi I Gde Mertha I Gde Mertha I Wayan Merta I Wayan Merta I Wayan Merta Ilhamdi, M. Liwa Ilhamdi, Mohammad Liwa Imam Bachtiar Imami, Vines Salsa Insani, Reginah Fhathonah Intan Putri Yasa Intiana, Rohana Hariana Irawan, Jono Izza Melati Sukma Jamaluddin Jamaluddin Jamaluddin Jamaluddin Jasanti, Ninsanti Aura Khairuddin Khairuddin Khairuddin Khairuddin Khairuddin Khairuddin Laela Innaza Laela Salsa A Lalu Japa Lalu Japa Lalu Japa Lalu Japa Lalu Japa Lalu Japa, Lalu Lalu Muh. Sofyan Hadinata Lalu Syukran Muhsin Lalu Zulkifli Lalu Zulkifli LALU ZULKIFLI Lidia Zindarti Nurmia Lidya Hasmaningsih Lilik Supiani Lina Maulina Linda Lestari Lisnawati Lisnawati Lulu Febrianti M. Liwa Ilhamdi M. Yamin M. Yamin M. Yamin Mahrus Mahrus Mahrus Mahrus Mahrus, Mahrus Mahyuni Mahyuni Mahyuni Mahyuni Mahyuni Manisa, Safariyanti MARDIANA MELATI, PUPUT Merta , I Wayan Moh. Liwa Ilhamdi, Moh. Liwa Mohammad Liwa Ilhamdi Mohammad Liwa Ilhamdi Mohammad Liwa Ilhamdi Muh Fahmi Zuhdi Muhlis Muhlis Muhlis Muhsin, Lalu Syukran Mulyani, Irna Mulyono S. Baskoro Mustaruddin Nanisfi, Maulidatin Ni Luh Putu Pebri Artayani . Ni Nyoman Muliaheni Nila Sari NURUL HIDAYAH Nurwijayanti Pahrurrozi PRAPTI SEDIJANI, PRAPTI Priyo Hartanto Purnamawati, Rena Putri, Luh Putu Sasmita Sridewi Putu Artayasa Rayyana Renita, Octa Rispawati Rispawati Rispawati Rispawati, Rispawati Rohana Hariana Intiana Rohani S. Rohana Hariana Intiana Safarianti Manisa Safruddin Safruddin Sirni Hadriwani Suganda, M. Tomy Aria Sulistia Ningrum Suliyadi, Suliyadi SUYANTRI, ENI Syachruddin AR Syafro’ Khuluq Jam’iyyah Syamsul Bahri Syamsul Bahri Tri Ayu Lestari Umami, Lia Ummi Auliya’ Amalina W. Apriani Wahyuningsih Wahyuningsih Wardatul Uyun Winata, I Gede Darma X Zardht Alex Hidayat Z. Thifali Z. Unsalhusna Zoelvianti, Oktry Zulhaida, Maria