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All Journal HAYATI Journal of Biosciences MEDIA KONSERVASI BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Matematika & Sains Berkala Penelitian Hayati Unram Journal of Community Service (UJCS) Biofaal Journal Jurnal Riset Rumpun Ilmu Kedokteran (JURRIKE) Jurnal Cendekia Mengabdi Berinovasi dan Berkarya Rumphius Pattimura Biological Journal Tolis Mengabdi : Jurnal Pengabdian Kepada Masyarakat Innovation for Community Service Journal Pentagon: Jurnal Matematika dan Ilmu Pengetahuan Alam
Handy Erwin Pier Leimena
Jurusan Biologi FMIPA-Universitas Pattimura, Jl. Ir. M. Putuhena, Poka-Ambon
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

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Kepadatan Populasi dan Pola Sebaran Teripang (Holothuroidea) di Perairan Pantai Tuhaha Pulau Saparua Kabupaten Maluku Tengah Fresylia Ribka Louhenapessy; Handy Erwin Pier Leimena; La Eddy
Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam Vol. 3 No. 3 (2025): September : Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/pentagon.v3i3.772

Abstract

Sea cucumbers (Holothuroidea) are marine organisms of high ecological and economic value, yet their populations in many tropical regions have declined due to exploitation pressures. This study aimed to analyze the density and distribution patterns of sea cucumbers in the coastal waters of Tuhaha, Saparua Island, Central Maluku Regency. A quantitative descriptive survey was conducted using 1 × 1 m quadrat transects along eight transect lines perpendicular to the shoreline. Density was calculated based on the number of individuals per unit area, while distribution patterns were determined using Morisita’s index. Four species of sea cucumbers were identified, namely Holothuria scabra, Holothuria atra, Bohadschia vitiensis, and Bohadschia marmorata, with a total of 33 individuals and an overall density of 0.19 ind/m². Species H. scabra exhibited the highest density (0.11 ind/m²), whereas H. atra and B. vitiensis had the lowest (0.01 ind/m²). The population distribution was aggregated (Id = 6.11), indicating a strong association with specific microhabitats, particularly muddy-sand substrates. Environmental parameters (temperature 30°C, salinity 30 ‰, pH 6.90) remained within the optimal tolerance range for sea cucumbers. These findings indicate that Tuhaha waters continue to support Holothuroidea populations; however, the aggregated distribution pattern reflects vulnerability to overexploitation. Therefore, ecosystem-based management through habitat conservation, catch restrictions, and the integration of aquaculture and restocking is essential to ensure the sustainability of sea cucumber resources in Central Maluku.
Kepadatan dan Pola Distribusi Teripang Hitam (Holothuria atra) di Pesisir Pantai Haenesai Desa Hulung, Kabupaten Seram Bagian Barat Iloni Touwe; Handy Erwin Pier Leimena; Evelin Tuhumuri
JURNAL RISET RUMPUN ILMU KEDOKTERAN Vol. 4 No. 3 (2025): Desember : Jurnal Riset Rumpun Ilmu Kedokteran
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrike.v4i3.6915

Abstract

The black sea cucumber (Holothuria atra) holds significant ecological and economic value in tropical marine ecosystems, including those of Maluku, Indonesia. This study aimed to estimate population density, spatial distribution patterns, and their relationship with environmental conditions along the Haenesai coast, Hulung Village, Taniwel District, West Seram Regency. Sampling was carried out using the belt transect method (50 m × 2 m) at three stations with three replications, while physicochemical parameters of seawater (temperature, salinity, pH, dissolved oxygen, and transparency) were measured in situ. A total of 96 individuals of H. atra were recorded, with an average density of 10.6 ind/100 m². Station I exhibited the highest density (13 ind/100 m²), whereas Station II showed the lowest (9.3 ind/100 m²). Distribution patterns were generally uniform at Stations I and II, while Station III displayed a clustered pattern. These variations are likely influenced by differences in water transparency, dissolved oxygen, and substrate heterogeneity that affect food availability. Overall, environmental conditions remained suitable for H. atra, although evidence of exploitation pressure from local harvesting was observed. Ecologically, H. atra plays a critical role as a bioturbator, maintaining sediment quality and coastal ecosystem stability. This study highlights the need for regulated harvesting, habitat protection, and aquaculture development as strategic measures for the sustainable management of sea cucumber resources in Maluku.
Kepadatan Populasi, Struktur Ukuran, Hubungan Panjang–Berat, dan Pola Sebaran Bia Jala (Strombus luhuanus) di Pantai Asol, Pulau Haruku Rikhe Fransy Kaihatu; Handy Erwin Pier Leimena; La Eddy
JURNAL RISET RUMPUN ILMU KEDOKTERAN Vol. 4 No. 3 (2025): Desember : Jurnal Riset Rumpun Ilmu Kedokteran
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrike.v4i3.6916

Abstract

This study evaluated the population status of the conch Strombus luhuanus at Asol Beach, , Haruku Island, Maluku, through an analysis of density, size structure, length–weight relationship, and spatial distribution. Data were collected using transect–quadrat methods in the intertidal zone during low tide, complemented by measurements of environmental parameters (temperature, salinity, pH, and dissolved oxygen). The results revealed a population density of 2.76 ind/m², classified as moderate compared to other sites in Maluku. Shell length distribution encompassed nine size classes, with dominance in the mid-size class (3.93–4.38 cm), indicating successful recruitment of juveniles to early adults. The length–weight relationship followed the equation W = 1.871L0.0521 (R² = 0.857) with a negative allometric growth pattern, suggesting that individuals allocate more energy to shell elongation than body mass increase. The Morisita index (Id = 211.07) indicated an aggregated distribution pattern, consistent with reproductive strategies of broadcast-spawning gastropods. Environmental conditions (temperature 28.7 °C; salinity 32.66‰; pH 6.44; DO 6 mg/L) were within the tolerance range of tropical intertidal mollusks. These findings highlight the critical role of sandy seagrass habitats in supporting S. luhuanus populations and emphasize the need for management strategies based on minimum catch size, harvest regulation, and coastal habitat protection.
Introducing Indonesian endemism, its threat and conservation solution for SMA Negeri 10 students in Kamarian Village, West Seram Regency, Maluku Leimena, Handy Erwin Pier; Seumahu, Cecilia Anna; Sahertian, Dece Elizabeth; Ukratalo, Abdul Mahid; Kaihena, Martha
Unram Journal of Community Service Vol. 5 No. 1 (2024): March
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i1.585

Abstract

West Seram Regency on Seram Island in Maluku Province, Indonesia has extraordinary biodiversity and is the habitat of several endemic species of Maluku and Indonesia. As a form of implementation of the dharma of community service, socialization was conducted with students of SMA Negeri 10 in Kamarian Village, West Seram Regency, Maluku about Indonesian endemism, its threats and conservation. The socialization was attended by 38 students. The socialization results indicate that 91% of students demonstrated a good understanding of endemic species, and 82% of students obtained information on endemic species from this activity. Additionally, students were able to identify 11 Indonesian endemic species, as well as the threats and efforts to protect them. This activity has the potential to increase environmental awareness among school students, the nation's young generation.
POPULATION STRUCTURE OF TOPSHELLS (TROCHUS NILOTICUS) IN SAPARUA ISLAND, CENTRAL MOLUCCAS-INDONESIA Leimena, Handy Erwin Pier; Subahar, Tati S.; Adianto
BIOTROPIA Vol. 14 No. 2 (2007): BIOTROPIA Vol. 14 No. 2 December 2007
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (836.546 KB) | DOI: 10.11598/btb.2007.14.2.18

Abstract

Lola snail (Trochus niloticus) is one of the largest sea snails that live in coral reefsat Indo Pacific region and Indonesia including Saparua Island, the province of Moluccas. In a few recent years, the exploitation of lola snails has been increasing, so that the population of lola snails in nature decreases.. The yield of lola snail in Saparua Island and in the archipelagos of Banda from 1979 until 1992 showed a decrease from around 4 tons of dry shells to only around 0.25 tons. Furthermore, this research was aimed to estimate the size structure, age structure, and the sex ratio of lola snails population in Saparua Island, the regency of Central Moluccas. The sampling of lola snails used transects strip method.  Each transect was 100 m long and 2 m wide, which were divided into 10 segments of 10 m x 2 m. Transect was laid perpendicular to the coast line started from the lowest fall of the tides to the coast. The Bhattacharya method was applied for data analysis. The frequency distribution of shell diameter revealed that lola snails in Saparua Island consisted of nine size classes and two different age classes, which indicated that the population of lola snails in Saparua Island had two periods of spawning. Finally, from this research it could be concluded that the sex ratio of lola snail was 1:1. 
Co-Authors Abdul Mahid Ukratalo Adianto Adianto Adianto Adianto Adianto Aminuyati Basyarewan, Eko Saputra N CECILIA ANNA SEUMAHU CECILIA ANNA SEUMAHU Dece Elizabeth Sahertian Evelin Tuhumuri Fresylia Ribka Louhenapessy Iloni Touwe La Eddy La Eddy Martha Kaihena Martha Kaihena Nadira Pattimura Rikhe Fransy Kaihatu Sahertian, Dece Elisabeth Sahertian, Dece Elizabeth Sahetian, Dece Elisabeth Samangun, Christmas Seumahu, Cecelia Anna SURYATI SYAMSUDIN TATI-SUBAHAR Tati S. Subahar, Tati S. Tati Suryati Subahar Tati Suryati Syamsudin Tati. S. Subahar Tuhumur, Evelin Ukratalo, Abdul M Ukratalo, Abdul Mahid Wakanno, Ferros Rozik