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INDONESIA
Treubia
Published by BRIN Publishing
ISSN : 00826340     EISSN : 2337876X     DOI : https://doi.org/10.55981/treubia
Core Subject :
Treubia is a scientific journal on zoology of the Indo-Australian Archipelago. We publish original research papers, review articles and case studies focused on animal systematics, animal ecology, and wildlife conservation, encompassing the Indo-Australian region. Animal systematics - New species discovery - Taxonomic assessment of an animal taxon - Systematic revision - Biological evolution of an animal taxon Animal ecology - Animal behavior - Animal distribution and biogeographic overview - Population assessment of an animal taxon Animal conservation - Threatened status assessment of an animal taxon - Environmental issues of an animal taxon
Arjuna Subject : -
Articles 787 Documents
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Cover and Preface Volume 52 Number 1 (2025)
Treubia Vol. 52 No. 1 (2025): Treubia 52 (1)
Publisher : BRIN Publishing (Penerbit BRIN)

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Abstract

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Record of Ichthyophis cf. hypocyaneus from the Menoreh mountain range, Central Java with notes on morphology and natural history Alfonsus Toribio Eko Saputro; Sandra Rafika Devi; Satria Maulana Aziz; Zulqarnain Assidiqi; Adian Dwi Sulistio; Rury Eprilurahman
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.13590

Abstract

This is a short communication, so no rigid format is required. Abstract is optional.
Mitogenomic evidence reveals the phylogeography of Sulawesi Actenoides kingfisher linked to geological barriers Yohanna Yohanna; Anik Budhi Dharmayanthi; Karen M. C Rowe; Rachael L. Joakim; Rauri C. K. Bowie; Andrew Engilis; Luke Bloch; Tri Haryoko; Dewi Malia Prawiradilaga; Noviar Andayani; Jatna Supriatna
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.14305

Abstract

The genus Actenoides (Alcedinidae) comprises brightly colored kingfishers endemic to the Indo-Australian Archipelago. It provides a good model for exploring how geological and ecological factorshave shaped diversification across Wallacea. Sulawesi has the highest diversity of Actenoides comparedto single-island representatives elsewhere. We aimed to study the phylogenomics of Actenoides acrossIndonesia, particularly in Sulawesi, to reveal evolutionary divergence associated with their endemicityusing the mitogenome. Phylogenomic relationships were reconstructed using Maximum Likelihood inIQ-TREE. Phylogenomic relationships inferred from Maximum Likelihood in the IQ tree showeddivergence between Sulawesi Actenoides and A. concretus, and between A. princeps and A. monachus,both supported by high bootstrap values. The genetic p-distance among those species inferred from theNJ tree showed genetic distances of around 8% between the Sumatra (A. concretus) and Sulawesilineages, and 6% between A. monachus and A. princeps. Furthermore, the population from northeasternSulawesi for both A. princeps and A. monachus showed early divergence from other populations; hence,it has deep and distinct lineages even from its closest sister populations in northwestern Sulawesi. Thesefindings highlight phylogenomic differentiation within Actenoides and emphasize the role of Sulawesi’scomplex geological history in promoting inland diversification of Wallacean birds.
Diversity and community structure of insects on sugar palm and their correlation with abiotic factors in Tanah Datar Regency, West Sumatra Province, Indonesia Zahlul Ikhsan; Sri Heriza; Siska Efendi; Arifda A.S. Waruwu; Sandy Miranda Pranata; Abdel Raheem
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.14371

Abstract

Sugar palm (Arenga pinnata Merr.) agroecosystems provide important ecological functions in tropical agricultural landscapes, particularly as habitats for pollinator insects and other arthropod communities. However, information regarding insect diversity and the influence of environmental factors on pollinator activity in sugar palm agroecosystems remains limited in Indonesia. This study aimed to evaluate insect diversity and community structure, and to examine the relationships between abiotic factors and insect abundance in sugar palm agroecosystems in Tanah Datar Regency, West Sumatra, Indonesia. Field observations were conducted in Lintau Buo and Sungayang Districts in 2025. Insects associated with sugar palm inflorescences were sampled during morning and afternoon observation periods using direct observation and sweep net methods. Community structure was analyzed using diversity, evenness, richness, and dominance indices. At the same time, the effects of abiotic variables on pollinator abundance were assessed using Negative Binomial Generalized Linear Models (GLM) and Spearman rank correlation analysis. A total of 2,297 insect individuals were recorded, consisting of 1,858 pollinator insects and 439 visitor insects belonging to 13 genera. Pollinator communities were dominated by Apis spp., Vespa sp., Polyrhachis spp., Episyrphus sp., and Tetragonula spp. Diversity analysis indicated moderate insect diversity, with high evenness and low dominance, suggesting relatively stable ecological conditions within the agroecosystem. Negative Binomial GLM revealed that rainfall significantly reduced pollinator abundance (Estimate = −0.084 ± 0.021 SE, p < 0.001), while relative humidity also negatively affected pollinator activity (p = 0.006). Spearman correlation analysis confirmed a strong negative relationship between rainfall and pollinator abundance (rs = −0.82, p < 0.01). These findings demonstrate that sugar palm agroecosystems support diverse insect communities and highlight the importance of environmental conditions in regulating pollinator activity within tropical agroforestry systems.
Response of bird community to oil palm plantation and agroforestry in Dramaga campus IPB University, West Java, Indonesia Syahras Fathin Aminuddin; Lintang Yodhy; Heri S. Yunus; Moh. Reza Sese Sese; M. Dhiya’ur Rachman Rachman; Rizki Amaliah; Puji Rianti; Windra Priawandiputra; Tri Atmowidi
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.14913

Abstract

As oil palm plantations continue to grow and become a mainstay commodity in Indonesia,unfortunately, this also has an environmental impact that can threaten bird communities. On the otherhand, the agroforest system is considered to be able to preserve the richness of bird species comparedto other monoculture plantations. This study analyzes how bird communities' response in oil palmplantation and agroforestry habitats is compared based on diversity, composition, species similarity,feeding guilds, and bird space use. This study was conducted at the Kebun Pendidikan Cikabayan (KPC)in the oil palm plantation area and the Taman Hutan Kampus (THK) in the IPB Dramaga campusagroforestry area, using transect, count point and vantage point methods from September to October2023. A total of 42 species belonging to 28 families were dominated by forest generalists, followed byopen habitat generalists, forest specialists, and forest edge species, 50% of which were insectivores. Thedaily activities of the dominant species in both locations showed differences between the use of spacein THK and KCP. Based on the diversity and evenness values, the THK location (H’= 2.95; E= 0.85)has a higher value than KPC (H’= 2.62; E= 0.78), although it is still in the same diversity category,namely moderate (H’= 2.5-2.9 in the moderate category). The species similarity index value also showsa species similarity of 75% between the two locations. Due to its relatively high diversity and potentialcarrying capacity for forest-dependent species in forest-agricultural landscapes, this area needs to bepreserved and its habitat quality improved planting native tree species with tall, hard stems that arefavored by hollow-nesting birds and food trees such as Ficus spp.
Short-term variation in phytoplankton and zooplankton assemblages across a seaweed- farming coastal gradient in Galesong, Sulawesi, Indonesia Rahmat Pratama Putra; Nur Halizah Roebetho; Putri Sakinah Resman; Andi Alya Yusriyyah; Amanda Pricella Putri; Asmi Citra Malina; Nita Rukminasari; Irmawati; Jamaluddin Fitrah Alam
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.15008

Abstract

Information on short-term variation in phytoplankton and zooplankton assemblages in tropical seaweed farming environments is still limited. This study aimed to characterize the taxonomic composition, abundance, diversity and weekly spatial patterns of phytoplankton and zooplankton along a nearshore-seaweed farm-offshore gradient in Galesong, South Sulawesi, Indonesia. Sampling was carried out once a week for six consecutive weeks at three permanent stations representing nearshore waters, active Kappaphycus alvarezii farm and offshore waters. Samples were analyzed by means of Inverse Distance Weighted (IDW) interpolation to determine the microscopic identification, ecological indices and spatial distribution mapping. The total number of phytoplankton taxa was 10 and the assemblage was dominated by the diatoms Chaetoceros sp. and Leptocylindrus sp. The phytoplankton abundance was always higher than the zooplankton abundance and the Shannon–Wiener diversity ranged from 1.67 to 1.99. Five zooplankton taxa were recorded with unidentified crustaceans, Tintinnopsis sp. and Balanus larvae being numerically dominant. Zooplankton Shannon-Wiener diversity ranged from 1.02 to 1.09. The offshore station had highest total abundance in Weeks 1–3, the nearshore station had highest values in Weeks 4–6, and the seaweed-farm station did not show a consistently unique pattern of abundance or diversity. This pattern suggests that environmental variability may cause redistribution of plankton assemblages, although the mechanisms were not directly tested in this study. These results offer a preliminary baseline of phytoplankton and zooplankton assemblages in the region of study. Future studies should incorporate greater spatial and seasonal sampling and environmental measurements to better understand factors influencing plankton variability.
Assessing mercury concentration in amphibians and reptiles near artisanal gold mining sites in Saweak Village, Lebong Regency, Bengkulu, Indonesia Vestidhia Y Atmaja; Aldy Riau Wansyah Hasibuan; Deni Parlindungan; Eti Widya Lestari; Cindy Fadli Wulandari Hutabarat; Desy Millenia Ramadhany
Treubia Vol. 53 No. 1 (2026): Treubia 53(1)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/treubia.2026.15190

Abstract

Traditional gold mining activities are widespread in various regions of Indonesia, including Bengkulu Province. Many of these operations are unlicensed, resulting in inadequate supervision and poor waste management. Mercury is one of the most common pollutants produced by artisanal mining. This study aimed to determine the diversity of reptile species and analyze mercury accumulation in keratin samples obtained from reptiles inhabiting Saweak Mining Village, Pinang Belapis District, Lebong Regency. Sampling was conducted along river sections in Saweak Village suspected to be contaminated by mercury waste. Herpetofauna were surveyed using the Visual Encounter Survey (VES) method combined with transects during their active periods, both diurnal (08:00-11:00) and nocturnal (19:00-22:00). Collected specimens were identified and analyzed for mercury content. A total of nine herpetofaunal species were recorded, consisting of six amphibians and four reptiles. Mercury concentrations varied among species, with the highest to lowest levels observed in the following order: Wijayarana sumatrana (AMP LB31), W. sumatrana (AMP LB16), Odorrana hosii (AMP LB26), Chalcorana chalconota (AMP LB30), Hylarana chalconota (AMP LB12), Phrynoidis aspera, Megophrys nasuta, O. hosii (AMP LB11), and Fejervarya limnocharis. The highest mercury level (3,073.19 µg/kg) was detected in Odorrana hosii, while the lowest (240.40 µg/kg) was found in Fejervarya limnocharis. These findings indicate that mercury contamination in the study area is pervasive and has been transferred across trophic levels, affecting both aquatic and terrestrial herpetofauna. This highlights the potential ecological risk of mercury pollution and supports the use of herpetofauna as effective biomonitors of long-term environmental contamination.

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