cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
INDONESIA
Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 2,520 Documents
 201   202   203   204   205 
Analysis of The Level of Farmers Welfare in The Sekaroh Jaya Community Forest Sekaroh Village Jerowaru District East Lombok Regency Zarkasyi, Akhmad; Markum, Markum; Wulandari, Febriana Tri
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9663

Abstract

The management of community forests plays a critical role in enhancing rural livelihoods. This study aims to analyze the income and welfare levels of farmers managing the Sekaroh Jaya Community Forest in Jerowaru District, East Lombok. A descriptive research approach was employed using both primary and secondary data collected through interviews and surveys of 65 randomly selected farmers. Data analysis included calculating net income, total costs, revenues, and comparing welfare status to World Bank poverty thresholds. The findings show that farmers earned an average net income of IDR 13,197,188/LLG/year from forest cultivation, with additional income from side jobs (IDR 1,535,000/year) and working family members (IDR 5,732,653/year), resulting in an average household income of IDR 20,464,841/year. While individual farmer welfare remains low, household-level welfare is categorized as high. These results indicate that household-level contributions significantly uplift overall farmer welfare. The study concludes that improving welfare strategies should not solely target individual income increases but also support household economic activities. These findings contribute to forest policy development and rural livelihood improvement strategies under community-based forest management programs.
Monitoring Land Cover Change Using Change Vector Analysis (CVA) in Central Bengkulu Regency, Indonesia Tikaputra, Firman; Puspaningsih, Nining; Tiryana, Tatang
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9724

Abstract

Monitoring land cover change is essential for sustainable spatial planning in regions undergoing rapid development. This study aimed to evaluate Land cover changes in Central Bengkulu Regency during the 2008–2024 period were analyzed using the Maximum Likelihood Classification (MLC) method, which identified nine land cover classes with moderately good accuracy (Overall Accuracy of 66.7% and Kappa coefficient of 61.3% for Landsat 5 imagery in 2008, and 58.0% OA and 50.1% Kappa in 2024). Significant land cover dynamics were observed, with notable increases in shrub and plantation areas, and substantial decreases in primary dryland forest, rice fields, and open land. Change Vector Analysis (CVA), combining NDVI and NDBI indices, proved effective in detecting both the magnitude and direction of land cover change. The largest change category was "Stable/Not Significant" (±65,000 ha), followed by "Rehabilitation/Recovery" (±24,700 ha), and "Urban Development" (±10,800 ha). These changes reflect the strong influence of socio-economic drivers such as population growth, land conversion for oil palm plantations, and settlement expansion, as well as ecological factors such as degradation and natural succession. The results indicate that the integrative approach of CVA and spectral indices can serve as a reliable spatio-temporal analysis tool to support spatial planning and sustainable land management policies, particularly in newly established regions vulnerable to land conversion.
Development of Tortoise Beetle Pest Populations (Coleoptera: Chrysomelidae) on Several Cultivars of Sweet Potato (Ipomoea batatas L.) Handayani, Ayudina; Supeno, Bambang; Haryanto, Hery
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9733

Abstract

Tortoise beetles are pests that can inhibit growth and cause damage to sweet potato plants, especially to the leaf organs. This damage will vary depending on the cultivar used as the host. The purpose of this study was to determine the development of tortoise beetle pest populations on several sweet potato cultivars (Ipomoea batatas L.) commonly found in West Lombok. The design used in this research activity was a Randomized Block Design (RBD) with six sweet potato cultivar treatments (K). These treatments were Lato-lato (K1), Cilembu (K2), Thailand (K3), Potato (K4), Ase (K5), and Ungu (K6). Each treatment was repeated 4 times to obtain 24 experimental units. The results of the study found three species of tortoise beetle pests, namely Lactoptera Tredecimunctata, Cassida Sircumdata, and Asphidimorpha Santaecrucis. The development of the tortoise beetle pest population showed fluctuations in all sweet potato cultivars from 5 to 15 WAP. Cultivars Ase, Thailand, and Potato tended to be more susceptible compared to the other three treatments (Purple, Lato-lato, and Cilembu). The intensity of tortoise beetle pest attacks fluctuated, and the Potato cultivar tended to show the highest attack compared to other cultivars.
Pteridophyte Species in The Forest Ecosystem of Lemor Botanical Garden, East Lombok Muhrani, Zuhra; Jufri, A. Wahab; Wirajagad, Gde Cahyadi
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9741

Abstract

Indonesia is renowned for having some of the highest biodiversity levels in the world, which includes a wide variety of fern species (Pteridophyta). This study aims to identify and describe the fern species found in the Lemor Botanical Forest Area, East Lombok. The research used a descriptive-exploratory method with a cruise method approach, allowing direct observation and sampling in the field. The results showed a total of 9 fern families belonging to 20 species, with 50 individual plants recorded. The dominant family found was Pteridaceae, comprising 5 species. The species diversity was analyzed using the Shannon-Wiener diversity index, which yielded a value of 2.86, indicating a moderate level of species diversity. These findings demonstrate the ecological potential of the Lemor Botanical Forest Area in supporting the sustainability of fern species, and provide important baseline data for future biodiversity conservation and management efforts in tropical forest ecosystems.  In conclusion, in the Lemor Botanical Garden Forest area of East Lombok, 9 families of ferns have been identified.
Effect of Frequency of Administration of Kappa-Carrageenan on Immune Response and Survival of Vibrio parahaemolyticus Infected Vannamei Shrimp (Litopenaeus vannamei) Febrianti, Baiq Yunita; Azhar, Fariq; Mukhlis, Alis
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9825

Abstract

Whiteleg shrimp (Litopenaeus vannamei) cultivation activities are often exposed to disease-causing pathogens, one of which is a bacterial disease from the genus Vibrio sp. One of the triggers is the accumulation of organic matter, leftover feed and feces in the waters which causes whiteleg shrimp to be toxic to NH3. Kappa carrageenan is a polysaccharide compound derived from red seaweed that has the potential as a natural immunostimulant. The study aimed to determine the effect of administering kappa carrageenan at different frequencies on the defense system of shrimp infected with Vibrio parahaemolyticus bacteria. The study used RAL, with 5 treatments and 3 replications. The highest Survival Rate (SR) value was found in P5 at 80% and the lowest in P3 at 22%. The highest RPS value was found in P5 at 94.82% which was given carrageenan once a week and the lowest in P3 at 82.18% which was given carrageenan every day. The highest THC amount was observed in P5 at 14.9 x 106 cells/ml and the lowest was in P1 at 5.01 x 106 cells/ml. The highest AF value was in the positive control treatment P1 66.6% and the lowest P2 negative control 44.2%. The highest TBC value was P1 1.24 CFU/mL and the lowest P5 0.29 CFU/mL. The highest TVC observation was P5 1.42 CFU/mL and the lowest was P1 0.18 CFU/mL. In conclusion, the administration of k-carrageenan 20 g/kg once every 7 days provided a better immune response and protection against shrimp infected with Vibrio parahaemolyticus bacteria.
The Characteristics of Morphometric Enhalus acoroides in the Seagrass beds of Malahing Village, Bontang City Putri, Niken Astrid Pradiva; Irawan, Aditya; Sari, Lily Inderia
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9030

Abstract

Seagrass beds are macro and micro habitats for marine aquatic biota. The habitat characteristics formed by seagrass beds are closely related to the species and morphometrics of the species. Enhalus acoroides is a seagrass species that has larger root, rhizome, and leaf morphometrics compared to other seagrass species. This study aims to determine the morphometric characteristics of E. acoroides in the seagrass beds of Malahing Village, Bontang City, East Kalimantan Province. This study was conducted from October 2024 to February 2025. Data collection of E. acoroides, water samples and bottom substrates used a purposive sampling approach divided into 4 stations with 3 replications. Sampling of E. acoroides density used a 50x50cm square frame. Each sample of E. acoroides stands was subjected to morphometric measurements. The density of E. acoroides in the seagrass beds of Malahing Village in the density criteria, the morphometric characteristics of leaves, rhizomes and roots were relatively smaller and associated with the sand bottom substrate.
Physical Processing of Various Forage Plants and Their Application in Aquafeed Development Haetami, Kiki; Aisyah, Aisyah; Abun, Abun
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9505

Abstract

Feed is a crucial element in aquaculture, directly influencing the growth and reproduction of aquatic organisms. This study aims to explore the potential of forage-based ingredients as alternative feed sources to reduce reliance on costly conventional inputs such as fish meal. Various locally available forages, including aquatic plants (Azolla sp., Lemna sp., and water hyacinth), tree legumes (leucaena and calliandra), and tuber crops (cassava leaves), were evaluated based on their nutritional composition and feasibility for use in aquafeed. Processing methods such as physical (drying, grinding, pelletizing), chemical (acid and enzyme addition), and biological (fermentation using Aspergillus niger or rumen enzymes) treatments were applied to enhance digestibility and reduce antinutritional factors. Analytical assessments showed that these treatments significantly lowered crude fiber content while increasing protein concentration and improving palatability. Fermented leucaena leaves and azolla powder, for instance, demonstrated improved nutritional profiles and potential for inclusion in practical feed formulations. The study concludes that forage-based feed processing improves feed efficiency and supports sustainable, low-cost aquaculture. Continued innovation in forage processing technology is recommended to support national feed self-sufficiency goals and promote environmentally friendly aquaculture practices.
Distribution and Composition of Waste on the Coast of Gili Trawangan Sabilillah, Sabilillah; Larasati, Chandrika Eka; Virgota, Arben
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9580

Abstract

The coastal area of Gili Trawangan, a prominent tourism destination, is facing increasing ecological pressure due to intensified tourism activities and population growth. This study aims to analyze the distribution and composition of macro debris along the coast of Gili Trawangan, North Lombok Regency. This study used transect and quadrat methods, as well as marine debris classifications according to NOAA and Tangavoa Blue. The results showed that the highest amount of waste was plastic (71%), followed by glass (13%), and ceramics (8%). The highest waste distribution was found at the port (62kg) and tourist areas (30%). These findings highlight that inadequate waste management and low public awareness significantly contribute to coastal pollution. Therefore, an integrated waste management strategy and increased public participation are urgently needed to preserve the marine ecosystem of Gili Trawangan.
Analysis of Mangrove Canopy Cover with MonMang Application in Gemuruh River, West Sumatra, Indonesia Irtanti, Amartia Eksa; Mukhtar, Erizal; Solfiyeni, Solfiyeni
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9593

Abstract

Mangrove canopies play a vital role in the photosynthetic process through their structure and density. The denser the canopy, the more difficult it is for sunlight to penetrate, making it less likely for mangroves in the seedling and sapling stages to receive adequate sunlight. This study aims to determine the mangrove canopy cover using the MonMang application and to determine the influence of environmental factors on mangrove trees. One method for measuring this is by applying the MonMang application in the mangrove forest of Sungai Gemuruh, Pesisir Selatan Regency, to determine canopy width within the ecosystem. The line transect method was used to estimate canopy cover, with transects laid from the shoreline inland through areas with true mangrove vegetation. Along the transects, 10 × 10 m plots were established. The MonMang application was applied to each plot to measure canopy cover, accompanied by data analysis, including the calculation of mangrove tree density. The results showed that the average canopy cover was higher along Transect II (76.88%) compared to Transect I (75.72%). Based on this study, it can be concluded that the estimated canopy cover in the Sungai Gemuruh Tourism Area falls into the category of very dense canopy cover.
Mini Review Protein Value and The Importance of Energy Ratio (Case study on Oreochromis Niloticus Diet) Haetami, Kiki; Harmonis, Jacky Abdul Aziz; Putri, Naila Jasmine Alifah; Nusyaibah, Kei Aqila; Putri, Nayla Chalisa; Syahputra, Moch Risfi; Aulia, Rio Farhan; Kusmana, Naufal Rizky
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.9597

Abstract

Nile tilapia (Oreochromis niloticus) is one of the most widely fish species in aquaculture due to its fast growth, high adaptability, and economic value. Factors influencing the success of tilapia  is the provision of nutritionally balanced feed, particularly regarding the type and level of dietary protein. This review aims to explain several biochemical aspects of the type and level of protein in feed as a support for growth efficiency, a case study on Nile tilapia (Oreochromis niloticus). Protein is an important component in metabolic processes. Several biochemical perspectives, including protein metabolism and digestive enzyme activity manifested in growth. Various studies show that optimal protein levels in feed can enhance the growth efficiency of Nile tilapia and growth parameters Specific Growth Rate (SGR). This study concludes that protein-based feed formulation needs to also consider the presence of other energy source contents such as carbohydrates in tilapia to achieve optimal aquaculture efficiency. This is because sufficient carbohydrates help protein as an energy source, thus protein will maximize to support growth, weight, and meat content in Nile tilapia. The most suitable protein content in tilapia fish based on several studies is 35-40% protein to prevent excess protein, while the carbohydrate content is 10-50% to support the growth of tilapia.

Page 203 of 252 | Total Record : 2520

 201   202   203   204   205 

Filter by Year

2013 2026


Reset
Filter By Issues
All Issue Vol. 26 No. 1 (2026): Januari-Maret Vol. 25 No. 4a (2025): Special Issue Vol. 25 No. 4 (2025): Oktober-Desember Vol. 25 No. 4b (2025): Special Issue Vol. 25 No. 3 (2025): Juli-September Vol. 25 No. 2 (2025): April-Juni Vol. 25 No. 1 (2025): Januari - Maret Vol. 24 No. 4 (2024): Oktober - Desember Vol. 24 No. 3 (2024): July - September Vol. 24 No. 2b (2024): Special Issue Vol. 24 No. 2 (2024): April - Juni Vol. 24 No. 1 (2024): Januari - Maret Vol. 24 No. 1b (2024): Special Issue Vol. 23 No. 4 (2023): October - December Vol. 23 No. 3 (2023): July - September Vol. 23 No. 2 (2023): Special Issue Vol. 23 No. 2 (2023): April-June Vol. 23 No. 1 (2023): Special Issue Vol. 23 No. 1 (2023): January - March Vol. 22 No. 4 (2022): October - December Vol. 22 No. 3 (2022): July - September Vol. 22 No. 2 (2022): April - June Vol. 22 No. 1 (2022): January - March Vol. 21 No. 3 (2021): September - Desember Vol. 21 No. 2 (2021): Mei - Agustus Vol. 21 No. 1 (2021): Januari - April Vol. 20 No. 3 (2020): September - Desember Vol. 20 No. 2 (2020): Mei - Agustus Vol. 20 No. 1 (2020): Januari - April Vol. 19 No. 2 (2019): Juli - Desember Vol. 19 No. 1 (2019): Januari - Juni Vol. 18 No. 2 (2018): Juli - Desember Vol. 18 No. 1 (2018): Januari - Juni Jurnal Biologi Tropis vol.17 No.2 Desember 2017 Jurnal Biologi Tropis vol.17 No.1 Juni 2017 Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016 Jurnal Biologi Tropis. Vol.16 No. 1 Juni 2016 Jurnal Biologi Tropis. Vol.15 no.2 Desember 2015 Jurnal Biologi Tropis. Vol.15 No. 1 Juni 2015 Jurnal Biologi Tropis. Vol.14 No. 2 Desember 2014 Jurnal Biologi Tropis. Vol.14 No. 1 Juni 2014 Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013 Jurnal Biologi Tropis. Vol.13 No.1 Juni 2013 More Issue