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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Pertanian Indonesia AL KAUNIYAH Jurnal Sumberdaya Hayati Jurnal Natural Jurnal Kesehatan Pengabdian Masyarakat Biodiversitas Journal of Biological Diversity
KANTHI ARUM WIDAYATI
Department Of Biology, Faculty Of Mathematics And Natural Sciences, Bogor Agricultural University, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Dentistry Earth & Planetary Sciences Education Energy Health Professions Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Nursing Physics Public Health

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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.
Coat Color Variation and Hair Color Banding in the Papuan Bandicoot (Echymipera kalubu, Marsupialia: Peramelidae) Maker, Ursula Paulawati; Suryobroto, Bambang; Atmowidi, Tri; Imai, Hiroo; Widayati, Kanthi Arum
HAYATI Journal of Biosciences Vol. 32 No. 6 (2025): November 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.6.1608-1625

Abstract

Coat color in mammals plays important adaptive roles, including camouflage, communication, and thermoregulation. Intraspecific variation in coat color is often associated with local environmental conditions. This study investigates coat color and hair color banding in the common spiny bandicoot (Echymipera kalubu), which exhibits ventral color polymorphism. We examined twenty individuals from Manokwari, West Papua, categorizing them into red-ventral and white-ventral groups. Coat color was quantified from digital photographs using CIE Lab* values, and hair color banding types were analyzed microscopically from body areas: dorsal, lateral, and ventral. Significant differences were found between the two groups and among the body areas. Red-ventral individuals exhibited higher a (redness) and b (yellowness) values, especially in the ventral area, whereas white-ventral individuals showed higher L (Lightness) values and reduced chromaticity. Seven hair color banding types were identified, with red-ventral individuals displaying a more diverse hair color banding type across body areas, particularly in lateral and ventral areas. Habitat substrate color analysis revealed that red-ventral individuals inhabited darker, red-yellow environments, whereas white-ventral individuals occupied lighter, less saturated habitats. The dorsal-to-ventral gradient in pigmentation and banding in E. kalubu is predicted to have a countershading function to avoid predators.
Sleep Quality and Its Dimensions in Indonesian Shift and Non-Shift Workers Shafira, Aviani Rinfi; Anisa, Nur; Assaumi, Nurul Wardah; Adhara, Gaetania Faza; Widayati, Kanthi Arum
HAYATI Journal of Biosciences Vol. 33 No. 2 (2026): March 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.2.427-434

Abstract

Sleep quality is crucial in maintaining overall well-being, but is often disrupted by irregular working hours. Shift work, as an example of irregular working hours, has been linked to disrupted sleep due to circadian desynchronization. Previous studies worldwide on the difference in sleep quality between shift and non-shift workers have remained  inconsistent, likely due to variations in work environments, behavioral and sociodemographic factors, and sample sizes. The objective of this study was to evaluate variations in sleep quality between shift and non-shift workers and to explore the underlying factors associated with sleep disruption in both groups. A cross-sectional study was conducted involving 218 workers (99 shift workers and 119 non-shift workers). The Pittsburgh Sleep Quality Index (PSQI) was applied to assess sleep quality, followed by statistical analyses to compare overall and individual component scores between groups. No significant difference was found in global PSQI scores between shift (8.75±3.01) and non-shift workers (8.22±2.8). However, when we evaluated sleep components between the two groups, shift workers showed significantly poorer subjective sleep quality (p = 0.0375) and lower sleep efficiency (p = 0.04471). Further analysis revealed significant associations between PSQI scores, shift frequency, and the number of diseases. Higher shift frequency and a greater number of diseases were associated with increased PSQI scores, indicating poorer sleep quality. These findings suggest that while overall sleep quality may not differ substantially by work schedule, specific components and individual factors, such as health status and workload frequency, contribute to variations in sleep quality.
Short Communication: A report on ranging behavior of Malayan flying lemurs, Galeopterus variegatus, in West Indonesia: Relationships with habitat characteristics YAMATO TSUJI; BAMBANG PRAYITNO; TAKAFUMI TATEWAKI; KANTHI ARUM WIDAYATI
Biodiversitas Journal of Biological Diversity Vol. 20 No. 2 (2019)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d200218

Abstract

Tsuji Y, Prayitno B, Tatewaki T, Widayati KA, Suryobroto B. 2019. Short Communication: A report on ranging behavior of Malayan flying lemurs, Galeopterus variegatus, in West Indonesia: Relationships with habitat characteristics. Biodiversitas 20: 430-435. We attached GPS telemeters to wild Malayan flying lemurs, or colugos (Galeopterus variegatus) (n = 3, one adult male, one adult female, one juvenile male) in Pangandaran Nature Reserve, West Java, Indonesia in August 2018, to preliminary evaluate their home range size and characteristics, paying special attention to relationships with forest structure. Home range sizes, generated from location points collected from 4 to 11 days, ranging from 1.2 to 5.4 ha (based on minimum convex polygon method) or from 1.3 to 4.2 ha (95% Kernel), which is much larger than home ranges of colugos inhabiting palm plantations. The home range sizes of adult colugos were larger than that of juvenile. The home ranges of an adult female and a juvenile overlapped. The generalized linear model demonstrated that the locations where the colugos stayed frequently possessed a small number of trees and/or had a single taller tree, and these effects were stronger than other factors. The home range preferences of colugos seem to be related to gliding effectiveness and/or predator avoidance. The mean gliding distances were 33 m, but sometimes reached > 250 m, and there were no significant differences among animals. Night time gliding frequency showed no clear difference between time periods. We confirmed the effectiveness of GPS telemetry for tracking colugo movements.
Dung beetle assemblages in lowland forests of Pangandaran Nature Reserve, West Java, Indonesia Windra Priawandiputra; Yamato Tsuji; Kanthi Arum Widayati; Bambang Suryobroto
Biodiversitas Journal of Biological Diversity Vol. 21 No. 2 (2020)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d210210

Abstract

Abstract. Priawandiputra W, Tsuji Y, Widayati KA, Suryobroto B. 2020. Dung beetle assemblages in lowland forests of Pangandaran Nature Reserve, West Java, Indonesia. Biodiversitas 21: 497-504. Dung beetles play crucial role in forest ecosystem, but no information on the dung beetle fauna has been reported in lowland forest of Java Island, Indonesia. Pangandaran Nature Reserve (PNR) area, which is recognized as lowland habitat of wildlife, can also support diversity of dung beetles. This study was conducted to examine the dung beetle diversity in lowland forests of PNR. The dung beetles were collected using pitfall traps baited with five species of mammal’s feces and hand collection of beetles found on dung along the road, between 2016 and 2018. During the study, 853 individuals of dung beetles from 17 species were collected. The dominant species were Onthophagus babirussa with 434 individuals (50.8%). The species were not dominant in the mountainous forests of West Java and in lowland forests of Southeast Sulawesi and East Kalimantan. The highest dung beetle abundances were found during the dry season (August): 335 individuals in 2017 and 286 in 2018. However, the diversity index value of dung beetles in this study was lower in the dry season than in the wet season (t-test of diversity index, P<0.05). The dung beetle assemblages in PNR were barely similar to most dung beetle studies of other regions.
Diversity of freshwater shrimp species of the genus Macrobrachium (Decapoda: Caridea) in the big river of East Kalimantan, Indonesia MAULIDA NUR ANNISA; KANTHI ARUM WIDAYATI; JUSMALDI JUSMALDI; ACHMAD FARAJALLAH
Biodiversitas Journal of Biological Diversity Vol. 26 No. 3 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260348

Abstract

Abstract. Annisa MN, Widayati KA, Jusmaldi, Farajallah A. 2025. Diversity of freshwater shrimp species of the genus Macrobrachium (Decapoda: Caridea) in the big river of East Kalimantan, Indonesia. Biodiversitas 26: 1474-1484. Freshwater prawns are widely distributed in Indonesia, belonging to the subphylum Crustacea and order Decapoda. Freshwater shrimp commonly found in Indonesia belong to the families Atyidae and Palaemonidae. The Palaemonidae family is usually dominated by species of the genus Macrobrachium. Information on freshwater shrimp diversity in East Kalimantan, Indonesia, has never been reported, while water quality in East Kalimantan is declining due to increased exploitation of natural resources. This study was conducted to provide baseline information on freshwater shrimp species diversity for the future, before further changes occur in the East Kalimantan region and we provide Cytochrome Oxidase subunit I (COI) sequence data for molecular identification. Methods used for species identification based on morphological characters and species confirmation through molecular analysis using Cytochrome Oxidase subunit I (COI) gene fragments for molecular analysis. This study reports the diversity of freshwater shrimp in East Kalimantan, the results of morphological analysis showed confirmation of 7 species of freshwater shrimp. The family Palaemonidae consists of 7 species: Macrobrachium rosenbergii, M. lanchesteri, M. scabriculum, M. mammillodactylus, M. sintangense, M. equidens, and M. villosimanus. Molecular confirmation of species of the genus Macrobrachium using the COI gene showed genetic distance values ranging from 0 to 0.024. The species in this study have been confirmed based on genetic distance values and phylogenetic trees.
Co-Authors ACHMAD FARAJALLAH Adhara, Gaetania Faza Akichika Mikami AKICHIKA MIKAMI Alfath Fanidya Anang Setiawan Achmadi Ananta, Muhammad Isa Andy Darmawan Arismayanti Eka Arma Aditya Kartika Assaumi, Nurul Wardah ASTUTI LATIF BAMBANG PRAYITNO Bambang Prayitno Bambang Suryobroto Bambang Suryobroto Burhanuddin Burhanuddin Cut Tina Meuthia Dela Putri Amalia Dwijayanti, Endah Emiko Nishi Eneng Nunuz Rohmatullayaly Farika Febriyanti HANNY RAMADHANTI Hapsari, Eno Aulia Hayati, Rizki Rahma Iffi Rizkiya Imai, Hiroo Inas Salimah Indira Nurul Qomariah Ishlah, Azimah Wardahtul Jusmaldi Jusmaldi Kadang, Septiany Anugrah Kania Dewi Rafa Liza Mahera Mahyana Maker, Ursula Paulawati Maria Ulfah MAULIDA NUR ANNISA Muhammad Al Anshari Muhammad Isa Ananta Nabila Dhiya Ulhaq Nadya Aulia Putri Nisa, Nisfia Rakhmatun Nur Anisa Nurul Huda Wulandari Ona Norwana Permesyawari Muktiono Puji Rianti Rahma, Hanifa Ramadhan, Muhammad Roykhan Dwidasa Ribut, Amat RIKA RAFFIUDIN Sadana, Firnandez Ngariswara Vidsia Santi Julianti Sarah Nila SARAH NILA Sarah Nila Sese, Moh. Reza Shafira, Aviani Rinfi SITI SARI AZYATI Soleha, Ismayanti Sri Suripti Suryono, Alfina Zalfa Syafaatun Alrahmah TAKAFUMI TATEWAKI Tanaka, Hiroyuki Tatewaki, Takafumi Tinia Leyli Shofia Ahmad Tri Atmowidi Tsuji, Yamato Wildan Arsyad F Winati Nurhayu WINDRA PRIAWANDIPUTRA, WINDRA Yahmi Ira Setyaningrum YAMATO TSUJI Yamato Tsuji Yamato Tsuji Yuniarti Dwi Astuti Zakaria, Muhammad Dafa