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All Journal HAYATI Journal of Biosciences Jurnal Sumberdaya Hayati
Rahma, Hanifa
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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.
Keanekaragaman dan Perbedaan Waktu Kunjungan Serangga pada Bunga Tanaman Jagung di Kebun Cikabayan, Kampus IPB Dramaga, Bogor: Biodiversity and Temporal Separation of Flower-Visiting Insects of Corn in Cikabayan Garden of IPB University, Bogor Rahma, Hanifa; Sofandi, Tazkiana Nurul Fathiya; Reza, Mohammad Iqra; Adhara, Gaetania Faza; Priawandiputra, Windra; Atmowidi, Tri
Jurnal Sumberdaya Hayati Vol. 12 No. 1 (2026): 2026
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.12.1.15-21

Abstract

Serangga memiliki berbagai peran di alam, seperti polinator, predator, dan mangsa. Interaksi antara serangga dengan tumbuhan berbunga merupakan elemen penting dalam mendukung proses reproduksi tanaman. Penelitian ini bertujuan untuk menganalisis keanekaragaman serangga pengunjung dan analisis pemisahan temporal kunjungan serangga pada bunga tanaman jagung di Kebun Cikabayan IPB, Dramaga, Bogor. Pengamatan keanekaragaman dilakukan dengan metode Visual Encounter Survey (VES) pada bunga pertanaman jagung selama 15 menit pada pukul 07.00–09.00 dan 15.00–17.00 pada fase generatif dan fase pasca-generatif.Pengamatan serangga pengunjung bunga jagung didapatkan 26 morfospesies yang termasuk dalam 8 ordo dan 22 famili. Tiga famili serangga dominan mengunjungi bunga jagung adalah Apidae, Vespidae, dan Formicidae. Spesies pengunjung terbanyak adalah lebah madu (Apis cerana, 83 individu). Hasil analisis menunjukkan tidak ada pemisahan temporal komposisi serangga pada perbedaan waktu dan fase pembungaan. Hasil NMDS menunjukkan pada fase pasca-generatif terdapat kecenderungan pemisahan waktu kunjungan pad pagi dan sore hari.
Co-Authors Adhara, Gaetania Faza Hayati, Rizki Rahma Kadang, Septiany Anugrah KANTHI ARUM WIDAYATI Reza, Mohammad Iqra Sadana, Firnandez Ngariswara Vidsia Sofandi, Tazkiana Nurul Fathiya Tri Atmowidi WINDRA PRIAWANDIPUTRA, WINDRA