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Harini Nurcahya
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INDONESIA
Journal of Tropical Biodiversity
Published by Universitas Nasional Jakarta
ISSN : -     EISSN : 27744116     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Immunology & microbiology
Journal of Tropical Biodiversity, ISSN : 2774-4116 (Online) is an international journal that publishes articles on all aspects of biological diversity-its description, analysis and conservation, and its controlled rational use by humankind. The scope of Biodiversity and Conservation is wide and multidisciplinary, and embraces all life-forms. published by Universitas Nasional Jakarta
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Hewan dan Zoologi
Articles 92 Documents
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External Quality Of Merawangarab Chicken Eggs With Different Genetic Composition Rafif Nurwansyah; Harini Nurcahya; Ikhsan Matodang; Sri Darwati
Journal of Tropical Biodiversity Vol 6 No 1 (2025): December 2025
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i1.329

Abstract

Eggs, as a food ingredient, possess complete nutritional value that is beneficial for human health, are readily available, affordable, and popular with the public. Likewise, hatching eggs provide the nutrients needed for the development of chicken embryos. Therefore, eggs for consumption as food and hatching eggs. The external quality of eggs is one indicator of egg quality. Merawang chickens and arab chickens are local Indonesian chickens. Crossbreeding of the two chickens is expected to produce superior offspring in production and egg quality. This study aimed to evaluate the external quality of merawangarab crossbred chicken eggs with different merawangarab genetic compositions (M), namely 25% M, 50% M, 62.5% M, and 75% M with a total of 30 hens. The materials used were eggs from merawangarab crossbred chickens. This study used a randomized block design (RAK) and continued with Tukey's further test. The external quality of eggs observed was shape index, egg weight, shell weight, and shell ratio. Different genetic compositions did not affect the external quality of merawangarab crossbred chicken eggs. Eggs from four crossbred merawangarab chickens were (25% M, 50% M, 62.5% M and 75% M) classified as small
Fish Diversity and Catch Composition of Purse Seine Fisheries Across Multiple Fishing Grounds in Weru Village, Lamongan Regency M Ainul Labib; Tatang Mitra Setia; Nonon Saribanon
Journal of Tropical Biodiversity Vol 6 No 1 (2025): December 2025
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i1.330

Abstract

Purse seine fisheries represent an important component of capture fishing activities conducted by local fishers in Weru Village, Lamongan Regency. However, spatial variations in catch composition and fish diversity across different fishing grounds are still poorly documented. This study aims to analyze fish community structure at four purse seine fishing locations through assessments of catch composition and ecological indices. Data were collected during July–August 2025 through direct observations at landing sites by recording the number of individuals for each species. Analytical procedures included the Shannon-Wiener Diversity Index (H’), Pielou’s Evenness Index (E), and Simpson’s Dominance Index (C) to evaluate community differences among locations. The results reveal clear spatial differences in fish community structure. In total, the purse seine fishery recorded 11 fish species with a total of 15,041 individuals across four fishing locations, indicating a marked disparity in catch abundance across the sites. Locations A and B were dominated by Hilsa kelee, with high catch numbers (3,886 and 7,286 individuals), resulting in low diversity (H’ = 0.18 and 0.06) and high dominance (C = 0.94 and 0.98). In contrast, location D demonstrated a more balanced and stable fish community structure, reflected in its notably higher diversity (H’ = 1.29), high evenness (E = 0.66), and low dominance (C = 0.40). These findings offer important baseline insights to support spatially informed management of small pelagic fisheries in the coastal.
The Effect of Food Tree Abudance in the Home Range of Adolescent Sumatran Orangutans (Pongo abelii) in Suaq Balimbing, Gunung Leuser, National Park, South Aceh Cinta Ningtiyas; Fitriah Basalamah; Sri Suci Utami Atmoko
Journal of Tropical Biodiversity Vol 6 No 2 (2026): April 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i2.351

Abstract

Ranging behavior plays a key role in the spatial and social strategies of Sumatran orangutans (Pongo abelii), a species characterized by fission-fusion dynamics and female philopatry. This study aims to analyze the relatedness between home range size and overlap levels with the utilization of food tree abundance in adolescent orangutans with differences in maternal relatedness and sex. This study uses long-term data from 2021–2024 at the Suaq Balimbing Research Station, Gunung Leuser National Park, South Aceh. Home range data were obtained using GPS, while food tree abundance was analyzed using Kriging interpolation. Home ranges were estimated using Kernel Density Estimator with a dyadic overlap approach. Statistical analysis was conducted using Generalized Linear Models to test the influence of home range size on overlap levels with related and unrelated individuals and food tree abundance. The results showed that home range overlap levels were influenced relatedness, with higher overlap is mother-offspring compared to other individuals. Adolescent orangutans will broader their space utilization in areas with low to moderate abundance of food trees. Sex and relatedness factors were more dominant in shaping adolescent ranging patterns compared to food trees. These findings indicate that the space use strategy of adolescent orangutans is not only determined by ecological factors, but also by sex and relatedness, which are more dominant in shaping adolescent ranging patterns.
Effect of Nano Biofertilizer with Spirulina platensis on Vegetative Growth and Nutrient Solution Stability in Floating Raft Hydroponic System of Vegetable Crops Nurhaidar Rahman; Nonon Saribanon; Puspita Deswina; Rita Noveriza; Nurhamidar Rahman
Journal of Tropical Biodiversity Vol 6 No 2 (2026): April 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i2.352

Abstract

This study aimed to evaluate the effect of nano biofertilizer derived from Spirulina platensis on the vegetative growth of mustard greens (Brassica juncea) and the stability of nutrient solution in a floating raft hydroponic system. The treatments included 100% AB mix solution as control, 100% Spirulina nano solution, and a combination of AB mix + Spirulina nano. The nano biofertilizer was formulated in two particle sizes, namely F1 (±165 nm) and F5 (±380 nm), each tested in combination with nutrient solutions to assess their effectiveness on plant growth and solution stability. Vegetative growth parameters observed were plant height, leaf number, leaf width, leaf length, and chlorophyll content. Solution stability was evaluated through measurements of pH, Electrical Conductivity (EC), and Total Dissolved Solids (TDS/PPM). The experiment was arranged in a randomized block design (RBD) with five treatments and four replications, he results showed that the combination treatment of 50% AB mix + 50% Spirulina nano (particle size F5) produced the best vegetative growth, with plant height reaching ±31 cm at the 6th week, greater leaf number, and higher chlorophyll content compared to other treatments. The 100% Spirulina nano treatment supported plant growth, but the results were still below those of AB mix. Analysis of pH, EC, and PPM indicated that Spirulina nano contributed to maintaining solution stability within the optimal range for hydroponics (pH 5.5–6.5; EC 500–1000 µS/cm). Spirulina nano has potential as an environmentally friendly alternative biofertilizer, either as a partial substitute or as a supplement to hydroponic nutrients, particularly when formulated in appropriate nano particle sizes (F1 and F5) to enhance nutrient absorption efficiency and stability of the floating raft hydroponic system
Density Figure of Aedes aegypti Larvae in the Laboratory Center of Universitas Nasional and Its Surrounding Residences Nico Hartandi; Hasni Ruslan; Tatang Mitra Setia
Journal of Tropical Biodiversity Vol 6 No 2 (2026): April 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i2.353

Abstract

Dengue remains a public health problem in Indonesia, caused by dengue virus with Aedes aegypti as the primary vector. Vector control requires data on larval density as an indicator of transmission risk. This study aimed to calculate the larval density of Ae. aegypti at the Laboratory Center of Universitas Nasional (UNAS) and its surrounding residences, and to describe the location and types of water-holding containers that potentially serve as mosquito breeding sites. The study was conducted from May to August 2025 using a descriptive observational approach. A total of 100 houses (premises) and 287 water-holding containers were inspected to calculate the House Index (HI), Container Index (CI), Breteau Index (BI), Density Figure (DF), and Larvae-Free Index (ABJ). The results showed HI = 38%, CI = 21%, BI = 59, DF = 6, and ABJ = 62%, indicating high larval density and a potential risk of dengue transmission. Most positive water-holding containers were found outdoors, and the most common container type identified was bucket. These findings suggest that environmental conditions still support mosquito breeding. It is recommended that the community routinely implement mosquito breeding site eradication activities based on the 3M-Plus principle (Menguras: draining and scrubbing containers; Menutup: tightly covering containers; Mendaur ulang: reusing or recycling discarded items; plus: additional preventive measures), that larval monitoring cadres (JUMANTIK) expand the coverage of larval surveillance, and that future research broaden its scope and methodology to obtain a more comprehensive understanding
Tree Stand Structure of Surili (Presbytis comata) Habitat in the Abi-Karna Forest Block, Tea and Cinchona Research Center, Gambung, Bandung Regency, West Java Feriska Lindayu; Marcelita Putri Utami; Salsa Mumtaz Saidatinah; Syivaul Jannah AH; Akhmad Rudini; Sri Suci Utami Atmoko
Journal of Tropical Biodiversity Vol 6 No 2 (2026): April 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i2.354

Abstract

Primates play a crucial role in forest conservation through seed dispersal from the fruits they consume. Factors influencing primate presence in their habitat include food availability, the presence of predators, and human activity. This study aimed to analyses the tree stand structure of the surili habitat in the Abi-Karna Forest Block, PPTK-Gambung, Pasir Jambu, West Java. The study was conducted over three days, from May 2-4, 2024, using the line transect method. Parameters measured included the number of trees, tree height (h), stem diameter (cm), crown thickness, crown curvature, and crown width diameter. Data analysis included relative density index, dominance, and tree species diversity. The results showed differences in tree stand structure between the western and eastern zones of the Abi-Karna Forest. The western zone had a higher tree species diversity than the eastern zone, with 2,022 and 1,612, respectively. The dominant tree species in both zones were Rasamala and Puspa. Tree heights in the western and eastern zones were 16-20 m, while tree DBH was 10-30 cm. The dense forest canopy plays acrucial role in providing primary food sources and maintaining ecosystem health. The dense canopy cover in the western zone is more conducive to surili activity than in the eastern zone. The tree stands in the Abi-Karna Forest provide food sources, shelter, and movement routes for surili (Presbytis comata) and other primates, such as the Javan langur (Trachypithecus mauritius), found in the area
Javan Primates’ Abundance and Distribution In The Mekarbuana and Sukasari, Mount Sanggabuana, West Java Rifda Humayra; Sinta Sri Delvi; Muhammad Farhan; Zahra Davina Salsabilla; Nadzifa Febi Azzura; Syifa Putri Azzahra; Meina Merintan; Nadia Fitriani; Sri Suci Utami Atmoko
Journal of Tropical Biodiversity Vol 6 No 2 (2026): April 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i2.355

Abstract

Mount Sanggabuana is a limited production forest area with potential primate diversity in West Java. This study aims to determine the distribution and abundance of primates in the Mekarbuana area, Karawang, and Sukasari area, Purwakarta. The study was conducted in October-November 2024 in Mekarbuana and September 2025 in Sukasari using the Recce method, with a total of eight observation routes. Data collected included the number of individuals, groups, coordinate positions, and primate activity. The encounter rate was calculated as the number of individuals or groups per kilometer of route. The results showed that in Mekarbuana, 4 primate species were recorded, namely Trachypithecus mauritius with an abundance of 7.47 ind/km and a relative abundance of 67%, Presbytis comata with an abundance of 2.36 ind/km and a relative abundance of 21%, Hylobates moloch with an abundance of 0.98 ind/km and a relative abundance of 9%, and nocturnal primate Nycticebus javanicus with an abundance of 0.39 ind/km and a relative abundance of 4%. In Sukasari area, 3 species were recorded, namely Trachypithecus mauritius with an abundance of 2.75 ind/km and a relative abundance of 89%, Hylobates moloch with an abundance of 0.23 ind/km and a relative abundance of 5%, and Nycticebus javanicus with an abundance of 0.23 ind/km and a relative abundance of 6%. Trachypithecus mauritius was the dominant species in both locations. Differences in primate abundance in both locations were influenced by food availability, vegetation structure, and the level of habitat disturbance. This research provides baseline data for primate conservation management on Mount Sanggabuana.
Bridging the Gap: Aligning Animal Welfare Ethics with One Health Responsibilities Among Exotic Pet Owners in Indonesia Averroes Oktaliza; Cinta Ningtiyas; Fitriah Basalamah; Retno Widowati
Journal of Tropical Biodiversity Vol 6 No 3 (2026): August 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i3.379

Abstract

The One Health framework emphasizes interdependence among human, animal, and environmental health, yet exotic pet ownership can create practical tensions between animal welfare ethics and public health responsibility. This mixed methods study examines those tensions among exotic pet owners in Indonesia. A convergent parallel design combined qualitative interviews with 30 owners and a cross-sectional survey. Of 60 survey submissions, eight were excluded because respondents reported cat-only ownership or no current exotic pet, producing a final analytic sample of 52. The Five Domains Model was used as an interview sensitizing guide rather than as a direct welfare scoring framework. Qualitative data were analyzed thematically, while survey data were analyzed using Fisher's exact tests as the primary inferential method, with Yates-corrected chi-square tests disclosed for comparability, Cramer's V for effect size, and Holm and Benjamini-Hochberg corrections for multiple testing. Survey results showed high declarative zoonosis knowledge (47/52, 90.4%), strong vaccination support (41/52, 78.8%), low regular veterinary utilization (16/52, 30.8%), and high zoonosis concern in half of respondents (26/52, 50.0%). Unadjusted Fisher tests suggested associations for veterinary use with vaccination support (p = 0.012) and vaccination support with zoonosis concern (p = 0.038), but no association remained statistically significant after Holm correction. Qualitative findings identified domestic-pet analogy, cleanliness-as-safety beliefs, fragmented zoonosis understanding, inconsistent vaccination practices, community-based knowledge networks, injury normalization, and welfare-focused ethics with limited public-health framing. The integrated findings suggest a value tension within this sample rather than a definitive population-level conflict. One Health interventions should connect public health responsibility to owners' existing welfare commitments while using veterinarians and community networks as complementary communication channels.
Reduction of Tannin on Red Kidney Bean, Yellow Soybean, and Black Soybean Through Peaghurt Fermentation Fathimah Azzahra Noorhadi; Yulneriwarni; Astri Zulfa
Journal of Tropical Biodiversity Vol 6 No 3 (2026): August 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i3.380

Abstract

Legumes are valuable food sources; however, their nutritional quality and utilization are often compromised by tannins, antinutrients that diminish nutrient bioavailability. Various processing methods, including soaking, boiling, germination, dehulling, roasting, and fermentation, have been applied to reduce tannin levels, with fermentation emerging as one of the most effective biological approaches. In this context, peaghurt—a novel probiotic beverage produced from fermented bean milk using lactic acid bacteria (LAB)—has gained attention due to its ability to modify physicochemical properties, including tannin content. This study assayed the efficacy of LAB starter combinations comprising Lactobacillus bulgaricus, Lactobacillus plantarum, and Streptococcus thermophilus in reducing tannin levels during peaghurt fermentation. Peaghurt was produced using a two-factor randomized block design (RBD) involving four LAB starter combinations and three bean milk substrates, each conducted in triplicate. Tannin content was quantified using UV–Vis spectrophotometry, and the data were analyzed using multivariate analysis of variance (MANOVA) followed by Tukey’s post hoc test. All LAB combinations significantly reduced tannin levels (12.79–46.18%), with the highest reduction observed in yellow soybean peaghurt fermented using the combined starter of L. bulgaricus, S. thermophilus, and L. plantarum (46.18%). This reduction is primarily ascribed to tannase activity synthesized by LAB during fermentation.
Ecological Responses of Three Bird Species to the Urban Landscape: Habitat Suitability and Connectivity in DKI Jakarta Ady Kristanto; Tatang Mitra Setia; Nurul Laksmi Winarni
Journal of Tropical Biodiversity Vol 6 No 3 (2026): August 2026
Publisher : Universitas Nasional Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/bio.v6i3.381

Abstract

Urbanization alters habitat structure and the ecological connectivity of urban wildlife. This study evaluated habitat suitability and connectivity for three bird species with contrasting ecological strategies—the Red-breasted Parakeet (Psittacula alexandri), Brown-throated Sunbird (Anthreptes malacensis), and Olive-backed Tailorbird (Orthotomus sepium)—in DKI Jakarta. Habitat suitability was modeled using MaxEnt with six environmental variables, while connectivity was analyzed using a circuit-theory approach in Circuitscape. The MaxEnt models yielded AUC values of 0.755–0.791, indicating fair predictive performance. The principal determinants differed among species: population density dominated the Red-breasted Parakeet model (52.7%), NDVI dominated the Brown-throated Sunbird model (40.6%), and land use dominated the Olive-backed Tailorbird model (41.0%). NDVI was consistently the most important variable according to permutation importance. Highly suitable habitat covered 9.6–19.5% of the study area. Connectivity analysis revealed contrasting patterns: the Red-breasted Parakeet exhibited centralized connectivity through narrow pinch points, whereas the Brown-throated Sunbird and Olive-backed Tailorbird displayed more diffuse corridor networks. Monas and Gelora Bung Karno consistently functioned as both habitat and connectivity hubs for all three species, making them priority areas for urban bird conservation in Jakarta.

Page 9 of 10 | Total Record : 92

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