Article Per Year (5 Year)
p-Index From 2021 - 2026
3.033
P-Index
This Author published in this journals
All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Jurnal Pengabdian Magister Pendidikan IPA Jurnal Ilmiah Profesi Pendidikan Jurnal Pijar MIPA
Lalu Japa
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics

Published : 26 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 26 Documents
Search

 1   2   3 
Karakteristik Bioekologi Rajungan (Portunus Pelagicus) Di Perairan Dusun Ujung Lombok Timur Didik Santoso; Karnan Karnan; Lalu Japa; Ahmad Raksun
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v16i2.3813

Abstract

Penelitian ini bertujuan untuk mengkaji ukuran rajungan yang tertangkap, menganalisisperbandingan jumlah rajungan jantan dan betina yang tertangkap, dan menganalisiskarakteristik habitat (salinitas, suhu, pH, dan bentuk dasar substrat perairan) di daerahpenangkapan rajungandi Dusun Ujung Lombok Timur. Jenis penelitian ini adalahpenelitian diskriptif dengan menggunakan metode survai dalam pengambilan data.Parameter yang diteliti adalah parameter biologi dan ekologi rajungan. Parameterbiologi yang diamati adalah jenis kelamin, dan lebar karapas, sedangkan parameterekologi adalah suhu, salinitas, dan pH perairam serta bentuk dasar substrat. Kondisisubstrat didominasi oleh fraksi pasir diikuti oleh fraksi lumpur dan fraksi liat. Hasilpenelitian menunjukkan bahwa kualitas air di daerah penelitian sangat sangat layak bagikehidupan rajungan, dengan sebaran suhu antara 290C – 300C. Salinitas perairan didaerah penelitian berkisar dari 31 sampai 32 ppt, dan Nilai pH perairan di lokasipenelitian berkisar antara 7.2 sampai 7.5. Distribusi lebar karaps rajungan di dominasioleh lebar diatas 100 mm baik jantan maupun betina. Proporsi lebar karapas rajunganjantan yang tertangkap dengan lebar diatas 100 mm adalah sebesar 41,7% dan betinasebesar 48,3% dari total sampel penelitian. Nisbah kelamin antara rajungan jantan danbetina adalah 0,8 : 1. Hal ini menunjukkan bahwa rajungan jantan dapat membuahilebih dari satu rajungan betina.
Larvacidal Effect of Methanol Extract from Soursop Leaves Against 3rd Instar Larvae of Culex sp. Mortality Ni Putu Maitri Vidya Cita Riesky; Syamsul Bahri; Lalu Japa
Jurnal Biologi Tropis Vol. 22 No. 4 (2022): October - December
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.v22i4.3906

Abstract

The Culex genus is widely distributed in Indonesia. It is responsible for disrupting and interfering of human daily activities and also transmitting some diseases for human. Vector control strategies normally involve the use of synthetic larvacide however excessive use causes adverse effect on environmental quality and resistance to larvae. Thus, extract from soursop (Annona muricata L.) leaves may be an alternative sources of larval control agents. The present study reveals the larvicidal effect of methanol extract from soursop leaves against 3rd instar larvae of Culex sp. mortality. Experimental method with Completely Randomized Design (CRD) consisting of 6 treatments (0 ppm, 125 ppm, 250 ppm, 500 ppm, 1000 ppm and 2000 ppm) and 4 replications was carried out with Culex sp. 3rd instar larvae and the larval mortality was recorded after 48 hours since the exposure. Data were analyzed using one way ANOVA which was continued by Tukey HSD and followed by Probit analyze to determine LC50 and LC90. The results showed that the methanol extract of soursop leaves exhibited significant larvicidal activity with LC50 and LC90 values are 586,099 and 2119,645 ppm. The highest concentration increases the mortality rate of larvae. In conclusion, the soursop leaves methanol extract has a larvacide effect on the 3rd larvae of Culex sp. 
Potential of Aik Bone Protected Forest as an Eco-Tourism Area Based on Structure, Composition and Vegetation Diversity Mega Safitri; Lalu Japa; I Gde Mertha
Jurnal Biologi Tropis Vol. 22 No. 4 (2022): October - December
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.v22i4.4265

Abstract

This research was intended to determine whether Aik Bone Protected Forest has potential to be developed as an ecotourism area based on the structure, composition and diversity of vegetation. Because the Aik Bone protected forest area had previously been developed into a tourist destination by surrounding community. But, it has been not success and cannot last long,, because the planning cinditions is bad and the lack of maintenance of the existing facilities. The Aik Bone protected forest is located in the Aik Bukak Village, North Batukliang District, Central Lombok Regency. The type of research was a descriptive quantitative research. The purpose research were to analyze about the density, frequency, dominance and diversity index of vegetation species. The vegetation species found in Aik Bone protection forest were classified into 15 families and with a total of 156 in dividuals/Hectare. Plants species that had the highest important value index at the seedling and sapling category were Caffea canephora. While for pole category is Tabernaemontana sphaerocarpa Blums and thee category Swietenia macophyla King. Species diversity index for seedling, sapling and tree categories was moderate, while pole category was low.
Quality Status of Coastal Waters of Special Economic Zone of Mandalika Central Lombok Based on the Community of Microalgae as Bioindicator Lalu Japa; Karnan Karnan; Baiq Sri Handayani
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 6 (2022): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i6.2740

Abstract

Coastal waters well known to provided large number of natural resources, but it recives some negative effects due to numerous ectivities take place on it, so it’s quality status tend to decrease. The coastal waters of Mandalika SEZ Central Lombok is no in exception. Microalgae as maind primery producent, have been much reported as bioindicator for controlling the waters quality. Study for community of microalgae as bioindicator in the coastal waters of Mandalika SEZ Central Lombok never been done. This study was conducted to observed and analyze the potency of microalgae community in the coastal waters of the Mandalika SEZ for determining the quality status that waters. Five bottles of 150 ml volume sea waters samples were collected using a free fall nylon plankton net of 20 πm mesh sized. Samples were preserved using formalin in final consentration of 4%. Samples were observed in both laboratories of Biology Education Faculty of Teacher Training and Education and Biology Science Faculty of Math and Science, University of Mataram. Data were analyzed for counting of density, percentage dominancy, and species diversity indexs. Total 72 species of microalgae were fully indentified and Chaetoceros didymum was a dominant species with percentage dominacy and density of 16.243% and 143.949 ind/L, respectively. The highest dencity was recorded in sample taken in the Seger Beach (1567.941 ind./L), then followed by the beaches of Gerupuk, Serinting, Mandalika, dan Kuta with density velue of 1469.214 ind./L, 1038.217 ind./L, 759.023 ind./L, and 622.081 ind./L, respectively. Based on the data of microalgae density, species diversity indexs, and number of taxa, the five sampling sites have high percentage similarity (83.336%). Species diversity index of microalgae in the coastal waters of the Mandalika SEZ was in intermediate category (H’=3.415). Based on the rerults of this study, mainly based on the velue of microalgae species diversity indexs, it can be concluded, that the quality status of coastal waters of Mandalika SEZ Central Lombok was in non polluted category
Bacillariophyceae Diversity as Bioindicator of Pollution in the Coastal Waters of Klui Beach, North Lombok Yuni Safrian Hadi; Lalu Japa; Lalu Zulkifli
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): January - March
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.v23i1.4387

Abstract

Klui Beach is one of some famous beaches tourism destination in the Northern part of Lombok Island which is commonly visited by many tourists. Tourisms and resindents activities that take place around the coast can produce various wastes that have some prominent impact on pollution, for reducing water quality. Bacillariophyceae is a class of phytoplankton that is commonly abundant in marine waters and can be used as an indicator for controlling of water quality. The objectives of this study were to determine the level of pollution in the coastal waters of Klui Beach based on the Bacillariphyceae diversity index. The Haphazard sampling was applied for determining the sampling sites. The results showed that the composition species of Bacilllariophyceae consisted of 48 species which included in 17 orders. Average species abundance was 298.09 ind/L (low category). The spesies diversity index was 2.37 (moderate category). The level of water pollution in the Klui Beach was classified as not polluted.
Stability of Anti-Insect Ingredient from Jayanti Plants (Sesbania sesban) for Integrated Control of Cabbage Pest Suripto Suripto; Hilman Ahyadi; Rachmawati Noviana Rahayu; Lalu Japa
Jurnal Penelitian Pendidikan IPA Vol 9 No 2 (2023): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i2.3293

Abstract

The specific purpose of this study was to determine the stability of S. sesban insecticide during storage before application and its stability in water during application. The dry powder of S. sesban leaves was extracted using water as the single solvent. Bioassay of S. sesban leaf extract was carried out on cabbage caterpillars (Plutella xylostella larvae) and Diadegma semiclausum imago on cabbage plants using a variation of storage time design. Mortality data of P. xylostella larvae and D. semiclausum imago were respectively processed by probit analysis to determine LC50. The results showed that the insect repellent content of S. sesban leaves was a compound from the saponin group and was unstable during simplicia storage, extract storage and also unstable in water before and during application. Storage of S. sesban leaf simplicia from 1 to 3 months only slightly reduced the lethal toxicity of the extract to P. xylostella larvae (mortality from 95 to 80% or LC50 from 28.82 to 28.83 ppm), but after 6 to 12 months storage, the lethal toxicity decreased drastically (mortality was 12.5 to 1.25% and LC50 was 247.99 ppm until calculated). Storage of S. sesban leaf extract from 7 to 15 days had resulted in a sharp decrease in lethal toxicity to P. xylostella larvae (mortality 70 to 40% and LC50 34.05 to 59.43 ppm) and 30 days storage causes the insect repellent to be inactive. (mortality was only 1.25% and LC50 was unaccounted for). Exposure to a solution of S. sesban leaf extract for 24 to 48 hours caused a decrease in lethal toxicity to P. xylostella larvae (mortality 32 to 28% and LC50 62.63 to 64.85 ppm) and after the solution was stored for 72 hours, the insect repellent was almost no active again (mortality was only 1.25 and LC50 was unstoppable). All storage treatments of insect repellent from S. sesban leaves showed no significant difference in the effect of lethal toxicity on D. semiclausum imago. In all the results of the bioassays, the mortality of D. semiclasum was 0 to 1.25% and each of all LC50(s) was unaccounted for
Pengaruh Pemberian Zat Pengatur Tumbuh Organik “Basmingro” Terhadap Pertumbuhan Alga Coklat (Sargassum aquifolium) Pada Skala Laboratorium Dhuha Alief Khanda Saefudin; Lalu Japa; Ahmad Raksun
Jurnal Ilmiah Profesi Pendidikan Vol. 8 No. 1 (2023): Februari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jipp.v8i1.1374

Abstract

Potensi alga laut/rumput laut di Indonesia sangat tinggi karena lahan yang tersedia sangat luas. Salah satu spesies alga laut yang bernilai ekonomis tinggi adalah dari kelas Phaeophyceae yaitu Sargassum aquifolium. Tujuan penelitian ini ialah untuk menganalisis pengaruh pemberian ZPT Organik “Basmingro” terhadap pertumbuhan Sargassum aquifolium pada skala laboratorium. Metode penelitian yang digunakan dalam penelitian ini menggunakan pendekatan secara eksperimental dengan menggunakan Rancangan Acak Lengkap (RAL). Sampel yang digunakan pada penelitian ini adalah Sargassum aquifolium dengan panjang awal 5 cm sebanyak 24 sampel yang diambil dari Pantai Pandanan, Kecamatan Pemenang, Kabupaten Lombok Utara, Provinsi Nusa Tenggara Barat. Analisis pada penelitian ini menggunakan uji ANOVA (Analysis of variences) dengan derajat kemaknaan 5%. Dari hasil uji ANOVA diperoleh nilai sig 0,65 > 0,05. Dengan demikian dapat disimpulkan bahwa tidak terdapat pengaruh nyata pemberian ZPT Organik “Basmingro” terhadap pertumbuhan Sargassum aquifolium pada skala laboratorium. Penelitian ini diharapkan dapat dikembangkan dengan melibatkan pengukuran berat pada setiap sampel sehingga dapat menggunakan rumusan pertumbuhan mutlak, harian, dan laju pertumbuhan untuk hasil penelitian yang lebih akurat.
Community Structure of Bacillariophyceae Class Microalgaes in Interidal Waters of Gili Sulat, East Lombok Nadia Audina; Khairuddin Khairuddin; Lalu Japa
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): January - March
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.v23i1.4679

Abstract

Gili Sulat is a mangrove forest area that is still in good condition and has a role in balancing the surrounding ecosystem, especially for the microalgae community. The community structure of the microalgae (phytoplankton) class Bacillariophyceae of the intertidal ecosystem of Gili Sulat, East Lombok has not been identified. The research was conducted to determine the community structure of the Basillariophyceae class in the Gili Sulat Intertidal Waters, East Lombok. This type of research is descriptive exploratory. Sampling of water in the Intertidal Waters of Gili Sulat, East Lombok, was carried out at six sampling points.  The analytical indices used are the density index, the diversity index, the species evenness index, and the importance value. The total density is 1,745 individuals/liter. The species diversity index value of 2.92 is included in the medium category. The highest significant value was obtained by Synedra ulna of 45.80% and was the species found at each sampling point. The species evenness index of 0.82 is classified as stable (even), meaning that no species dominates the large number of individuals at a particular sampling point. The community structure of the microalgae class Bacillariaphyceae in the intertidal waters of Gili Sulat, East Lombok is quite stable because it has a fairly high density, with species diversity in the moderate category and high evenness of species and the dominance of each species is relatively the same (so no species dominates).
Species Compotition of Foraminifera Benthos in The Intertidal Coastal Water Of Klui Beach North Lombok Laila Nurul Safitri; Imam Bachtiar; Lalu Japa; Muchlis
Jurnal Biologi Tropis Vol. 23 No. 1 (2023): January - March
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.v23i1.4858

Abstract

Foraminifera can be utilized as a sign of ecological changes, so it is vital in the administration of coral reefs. The purpose of this study was to determine: the species composition of benthos foraminifera, substrate cover of habitat and diversity index, uniformity index, and dominance index species of benthos foraminifera. The method used in this research was systematic sampling, where the sample was systematically taken by making three pairs of squares on each transect so that 18 points were obtained, or 2700 samples. The four identified species of foraminifera namely: Sphaerogypsina globulus, Schlumbergerella neotetraedra, Schlumbergerella floresiana, and Baculogypsina sphaerulata with a comparative abundance of 1611, 775, 275, and 39 respectively. The highest species composition (59.5%) was S. globulus, followed by S. neotetraedra at 28.5%, S. floresiana at 10.1%, and the lowest was B. sphaerulata at 1.5%. At Klui Beach, the species diversity index of foraminifera was 0.960; the evenness index was 0.003; and the species dominance index was 0.448. The most substrate cover was limestone, among the six types of substrate cover. Large algae and live coral substrates were the only substrate covers that showed a significant correlation with the abundance of S. floresiana.
Species Diversity of Gastropoda in Seagrass Ecosystems at Mandalika Beach Arif Safrillah; Karnan Karnan; Lalu Japa
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - 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.v23i3.5125

Abstract

Madak is looking for or hunting marine biota that can be consumed or has high economic value. Madak's activities can still threaten the existence of species on Mandalika Beach, one of which is Gastropods. This research focuses on the diversity of gastropod species that live in seagrass beds at Mandalika Beach. This study aims to identify the abundance and analyze the diversity index, uniformity index and dominance index of gastropod species in seagrass ecosystems on the Mandalika coast. This type of research is included in the type of descriptive-explorative research. This study describes the diversity of gastropod species in seagrass ecosystems on Mandalika Beach. The testing procedure utilized purposive examining. The research was conducted at 3 stations with 3 transects at each station. The results showed 27 species and 15 families of Gastropods. The species abundance value was 0.796 ind/m2, the species diversity index value was 1.849, the uniformity index value was 0.686, and the dominance index value was 0.280.
Co-Authors Afiatul Hafifah Agil Al Idrus Ahmad Raksun Annisa Mujriati Arif Safrillah Baiq Diana Safitri Baiq Dini Najia Dzurrahmi Baiq Sri Handayani Baiq Sri Handayani Dhuha Alief Khanda Saefudin Didik Santoso Dita Anggraini Safitri Sipayung Eni Suyantri Gito Hadi Prayitno Harsa Naunik Qudraty Hilman Ahyadi I Gde Mertha I Gede Mertha Imam Bachtiar Intan Mushlihah Jamaluddin Jamaluddin Karnan Karnan Khairatun Nafisah Khairuddin Khairuddin Khusnul Hayatunnisa Laila Nurul Safitri Lalu Hasan Nasirudin Zohri Lalu Zulkifli Mega Safitri Muchlis Muhamad Hairil Anas Nadia Audina Ni Putu Maitri Vidya Cita Riesky Noar Muda Satyawan Nurseha Nurseha Prapti Sedijani Prapti Sedijani Rachmawati Noviana Rahayu Rizky Regina Kawirian Suripto Suripto Syamsul Bahri Tasya Nurul Aulia Widia Apriani Yuni Safrian Hadi