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All Journal TRITON : Jurnal Manajemen Sumberdaya Perairan Indonesian Journal of Mollusk Nekton Mestaka: Jurnal Pengabdian Kepada Masyarakat Open Global Scietific Journal Jurnal Laut Pulau Journal of Coastal and Deep Sea Balobe: Jurnal Pengabdian Masyarakat
Junita Supusepa
Program Studi Ilmu Kelautan, FPIK, Universitas Pattimura
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Other

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Litter Production of Enhalus acoroides and Thalassia hemprichii in the seagrass ecosystem of Tanjung Tiram, Inner Ambon Bay Pasanea, Krisye; Supusepa, Junita; Putri, Amelia
Nekton Vol 5 No 2 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i2.1074

Abstract

Seagrasses are important primary producers that support marine life. The litter, or fallen leaves, of seagrasses plays a vital role as a source of nutrients in coastal ecosystems. One of the seagrass ecosystems found in Inner Ambon Bay is located in Tanjung Tiram. Studies on litter production have been extensively conducted in mangrove ecosystems; however, in the Maluku region, only one such study has been reported, and no research on seagrass litter production has yet been documented. Litter production serves as an important indicator for assessing coastal ecosystem functioning and blue carbon stocks. Therefore, this study aimed to analyze the litter production of two seagrass species, Enhalus acoroides and Thalassia hemprichii, in the Tanjung Tiram waters of Inner Ambon Bay. The research was conducted from July to August 2025 in the Tanjung Tiram seagrass ecosystem, Ambon City. Litter production was measured using the cage method, constructed from a 3 mm mesh nylon net with dimensions of 0.5 × 0.5 m. Prior to cage installation, the substrate was cleared of existing litter material and benthic organisms, and seagrass density was subsequently estimated. The study period lasted for 3 × 24 hours, with floating and sunken litter collected every 24 hours. The collected litter was oven-dried and weighed to determine dry biomass. Results showed that both E. acoroides and T. hemprichii produced higher amounts of sunken litter (0.0082 g dry weight/shoot/day and 0.0063 g dry weight/shoot/day, respectively) compared to floating litter (0.0062 g dry weight/shoot/day and 0.0028 g dry weight/shoot/day, respectively). The total litter production of E. acoroides (0.0144 g dry weight/shoot/day) was higher than that of T. hemprichii (0.0091 g dry weight/shoot/day).
Length–Weight Relationship of Skipjack Tuna (Katsuwonus pelamis) Landed at Tulehu Village, Maluku Udimera, Rocky; Moniharapon, Domey Lowits; Soukotta, Imanuel V.T.; Rahman, Rahman; Supusepa, Junita
Nekton Vol 5 No 2 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i2.1081

Abstract

Skipjack tuna (Katsuwonus pelamis) caught in the Banda Sea using purse seines and pole-and-line (huhate) fishing gear has shown a decrease in population size parameters. The parameters observed included size distribution and length–weight relationships, both of which serve as indicators of the size at first capture and first gonadal maturity. This study aimed to analyze the growth pattern of skipjack tuna landed by fishermen at Tulehu fishing port from April to June 2025. The analysis covered fish size distribution and the length–weight relationship. The results showed that the total length distribution of skipjack tuna caught in Tulehu waters reached its highest average in June (24 cm). The highest standard deviation of total length was observed in April (21.7 cm), while the lowest occurred in May (13.4 cm), suggesting that the skipjack population in Tulehu waters represents different recruitment groups. The length–weight relationship obtained was expressed as W = 0.000008 L³·⁰¹⁴⁷, indicating positive allometric growth, meaning that weight increases faster than length. The highest mean weight was recorded in June, with the greatest standard deviation observed in April. Based on these findings, it is recommended that the current size and weight data be used to determine the optimal capture size for skipjack tuna. Furthermore, fish at this stage are in the process of gaining additional body mass, which serves as an energy reserve for spawning activities.
Keanekaragaman Spesies Gastropoda di Zona Intertidal Negeri Tial, Maluku Tengah Rumbati, Mawar; Haumahu, Sara; Supusepa, Junita
Jurnal Laut Pulau: Hasil Penelitian Kelautan Vol 2 No 2 (2023): Jurnal Laut Pulau
Publisher : Prodi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jlpvol2iss2pp1-5

Abstract

Gastropoda memiliki peranan penting dalam rantai makanan di ekosistem laut. Penelitian ini dilakukan dengan tujuan untuk mengalanisa keanekaragaman spesies gastropoda pada zona intertidal Negeri Tial, Maluku Tengah. Penelitian dilakukan pada bulan Maret 2023, dengan menggunakan metode transek garis. Data gastropoda dikoleksi pada 11 transek. Sebanyak 22 spesies gastropoda ditemukan dalam penelitian ini dan dikelompokan dalam 17 genera, 12 famili dan 6 ordo. Spesies Tenguella granulata memiliki kepadatan dan kemimpahan tertinggi (masing- masing 0,75 ind/m2 dan 13176 individu) Morula uva, Cypraea tigris, dan Mauritia arabica memiliki kepadatan dan kelimpahan terendah. Nilai indeks keragaman spesies gastropoda termasuk kategori sedang, indeks kerserasian spesies berada dalam kategori stabil dan indeks dominasi spesies gastropoda termasuk dalam kategori rendah. Hasil penelitian ini menyediakan data tentang daftar spesies gastropoda pada perairan negeri Tial.
Co-Authors Dina A Tuhuteru Fahrul Rozy Fakaubun Frijona Fabiola Lokollo Gino Valentino Limmon, Gino Valentino Hulopi, Mahriyana Imanuel Villian Trayanta Soukotta Irma Kesaulya Kalay, Degen A Kalay, Degen E. Krisye Pasanea Limmon, Gino V. Loupatty, Sven R M.F Sahetapy, Jacqueline Marlin C Wattimena Moniharapon, Domey L Moniharapon, Domey L. Moniharapon, Domey Lowits Natan, Juliana Prulley Annette Uneputty Putri, Amelia Rahman Rahman Rahman Rahman Ratuluhain, Eva Susan Rijoly, Frederik Rijoly, Fredik Rijoly, Fredrik Rumbati, Mawar Saleky, Valentine D Saleky, Valentine D. Sara Haumahu Sardjoko, Sarfan Naufal Simon Tubalawony Sven R Loupatty Tuahatu, Juliana W. Tuapetel, Friesland Udimera, Rocky Valentine Domaris Saleky Wattimury, Misella Elisabeth