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All Journal HAYATI Journal of Biosciences Bioma : Jurnal Biologi Indonesia
Kadang, Septiany Anugrah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Immunology & microbiology

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Observation of Self-Assemblage Behavior in African Nightcrawler (Eudrilus eugeniae) Hayati, Rizki Rahma; Rahma, Hanifa; Sadana, Firnandez Ngariswara Vidsia; Kadang, Septiany Anugrah; Widarto, Tri Heru; Widayati, Kanthi Arum
HAYATI Journal of Biosciences Vol. 32 No. 5 (2025): September 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.5.1363-1367

Abstract

Self-assemblage is a form of social behavior observed in some earthworm species, where individuals spontaneously group with conspecifics. This behavior has been previously documented in Eisenia fetida, an epigeic species widely used in vermiculture. However, the presence of similar behavior in E. eugeniae, another commonly used vermicomposting species, remains untested. This study aimed to investigate the self-assemblage behavior of E. eugeniae through a Y-tube choice test, evaluating individual preferences for conspecific presence. The experiment was conducted under controlled laboratory conditions using 30 replicates for both main (with conspecifics) and control (without conspecifics) treatments. Results showed a significant preference for the conspecific group in the main test (χ² = 6.5, p = 0.01), while no directional bias was observed in the control. However, decision-making time did not differ significantly between treatments (p = 0.63). These findings indicate that E. eugeniae displays active self-assemblage behavior. Further research is needed to identify the mechanisms underlying this behavior and its implications for applied soil ecology.
Anura diversity and distribution at the three anthropogenic habitat areas of the IPB Dramaga Campus, West Java, Indonesia Anwar, Chairunisa; Rahma, Nur Azizah Maulidiyah; Nakadira, Ninda Luqya; Kadang, Septiany Anugrah; Munggaran, Rahmat Agung; Rianti, Puji
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.55973

Abstract

Anura, a group of amphibians widely distributed in freshwater and terrestrial ecosystems, has been understudied regarding its diversity and distribution patterns in urban terrestrial settings. This study aims to identify the species composition, diversity, evenness distribution patterns and  environmental correlates of Anura across three differing disturbance level areas within the IPB Dramaga campus in Bogor. Data was collected using the Visual Encounter Survey method. The results indicate that Anura distribution across the three habitats tends to be clustered, comprising 199 individuals from six species and four families. Duttaphrynus melanostictus dominated habitats with high disturbance levels, highlighting its ecological significance as a tolerant species capable of surviving and dominating amphibian communities in disturbed areas. Conversely, the low-disturbance area exhibited the highest species diversity (H′ = 1.13) and evenness (E = 0.63) compared to the other two habitats, supported by an average soil pH of 5.09 and soil moisture of 59.8%. Environmental factors and human activities likely influenced differences in community structure. These findings emphasize the importance of maintaining diverse microhabitats in urban areas to support the persistence of both disturbance-tolerant and sensitive amphibian species.
Co-Authors Anwar, Chairunisa Hayati, Rizki Rahma KANTHI ARUM WIDAYATI Munggaran, Rahmat Agung Nakadira, Ninda Luqya Puji Rianti Rahma, Hanifa Rahma, Nur Azizah Maulidiyah Sadana, Firnandez Ngariswara Vidsia