Bivalvia in The Intertidal Tiwoho and Tongkaina, North Sulawesi

Celvin Makawata; Medy Ompi; Erly Kaligis; Kurniati Kemer; Sandra O. Tilaar; Noldy G.F. Mamangkey

doi:10.35800/jplt.14.2.2026.67381

Authors

Celvin Makawata Universitas Sam Ratulangi
Medy Ompi Universitas Sam Ratulangi
Erly Kaligis Universitas Sam Ratulangi
Kurniati Kemer Universitas Sam Ratulangi
Sandra O. Tilaar Universitas Sam Ratulangi
Noldy G.F. Mamangkey Universitas Sam Ratulangi

DOI:

https://doi.org/10.35800/jplt.14.2.2026.67381

Keywords:

bivalvia; bysus; intertidal; distribution patterns; environmental factors

Abstract

This study aims to identify the species, density, size variation, and distribution of bivalvia in the intertidal Tiwoho and Tongkaina. The study used belt transect and survey exploration methods. At each location,three belt transects were applied parallel to the coastline. Observations outside the belt transect were also applied. The distance among belt transects were 10 meters. All specimens were identified. Species density in the belt transect was counted. The results show the total of 9 species bivalvia belong to 5families, namely Mytilidae, Isognomonidae, Margaritidae, Arcidae, and Modiolidae. The identified species included Septifer bilocularis, Isognomon isognomum, Isognomon perna,Isognomon ephippium,Isognomon australicus, Pinctada maculata, Barbatia barbata, Lamarcka imbricata, and Modiolus - modiolus. All of the species attached to hard substrates using byssus. The highest density was S. bilocularis (15 individuals/100 m²) in Tiwoho, while l. isognomum with 4.67 individuals/100 m² in Tongkaina. The length of the bivalvias ranged from 12 mm to 95 mm. Most bivalvias attached to their substrates and formed clumped distribution on both locations. Some species, such as P. maculata and B. barbata, showed a uniform distribution pattern.

Keywords: bivalvia, bysus, intertidal, distribution patterns, environmental factors

Abstrak

Penelitian ini bertujuan untuk mengidentifikasi jenis-jenis, kepadatan, variasi ukuran, serta pola distribusi setiap jenis di intertidal Tiwoho dan Tongkaina. Penelitian menggunakan metode 'belt transect' dan survei jelajah. Pengambilan sampel dilakukan dengan meletakkan tiga belt transek yang sejajar dengan garis pantai di masing-masing lokasi. Setiap lokasi memiliki 3 belt transek, di mana jarak antara belt transek adalah 10 meter. Sampling bivalvia dilakukan juga bagi yang berada di luar 'belt transect'.Semua specimen diidentifikasi. Analisa kepadatan dilakukan bagi spesies teridentifikasi dari dalam 'belt trabsect'. Hasil penelitian menemukan 9 spesies bivalvia yang termasuk dalam 5 famili,yaitu Mytilidae, Isognomonidae, Margaritidae, Arcidae, dan Modiolidae. Spesies yang teridentifikasi, yaitu; Septifer bilocularis, Isognomon isognomum, Isognomon perna, Isognomon ephippium,Isognomon australicus, Pinctada maculata, Barbatia barbata, Lamarcka imbricata, dan Modiolus-modiolus. Jenis S. bilocularis memiliki kepadatan yang tinggi (15 ind/100 m²) dibandingkan dengan jenis lainnya di lokasi Tiwoho. I. isognomum dengan 4,67 ind/100 m² teridentifikasi memiliki kepadatan yang tinggi di intertidal Tongkaina. Ukuran panjang bivalvia berkisar antara 12 mm hingga 95 mm. Umumnya jenis-jenis bivalvia memiliki pola distribusi mengelompok untuk kedua lokasi. Jenis-jenis, seperti, P. maculata, dan B. barbata teridentifikasi memiliki suatu pola distribusi yang seragam.

Kata kunci: bivalvia, bysus, intertidal, pola distribusi, faktor lingkunga

References

Ambarak, M. Z., Ompi, M., Paransa, D. S. J., Rimper, J. R., Rumengan, A. P., Bataragoa, N. E. 2021. Keanekaragaman Makrobentos yang Menempati Agregasi Kerang, Septifer bilocullaris di Tiwoho, Kabupaten Minahasa Utara, Sulawesi Utara. Jurnal Pesisir Dan Laut Tropis, 9(3), 133 - 140. https://doi.org/10.35800/jplt.9.3.2021.38043

Dahliana,D. 2023. Kelimpahan Kerang Bambu (Solen Sp) di Pantai Mutiara Kecamatan Sukadana Kabupaten Kayong Utara Kalimantan Barat Doctoral Dissertation, Universitas Tanjungpura).

Dharma, B. 2005. Recent and Fossil Indonesian Shells. Conch Books, Hackenheim,Germany.p 424.

Fowler,J., Cohen,L., Jarvis, P. 1998. Practikal Statistics for Field Biology. Jhon Wiley & Sons Ltd. New York. p 259.

Gaghansa, A.I.,Ompi, M., Rimper, J. R., Angmalisang, P. A., Kaligis, E. Y.,Watung,J.C. 2022. Ukuran Cangkang, Perkembangan Gonad, dan 'Survival' Abalon Haliotis varia, di Pesisir Timur Likupang. Jurnal Pesisir dan Laut Tropis, 10(2), 194-201. https://doi.org/10.35800/jplt.10.2.2022.54992

Gosling, E. 2015. Marine Bivalvia Molluscs. John Wiley & Sons. p 524.

Son,J.,Kim,J.,Sohn,M.,Ji,C.,Jeong,S.,Kim,I, G., Kang, J., Kong, H. J., Park, C.,Kang, K. 2025. Physiological Effects of Suspended Solids on Venerupis philippinarum and Argopecten irradians. Fishes 2025, 10,432. 10.3390/fishes10090432.

Krebs,C.J.1989.Ecological Methodology. Babara Bert/Nort 7 Atelier Ltd. New York. p 654p.

Litaay, M., Darusalam, Priosambodo, D. 2014. Struktur Komunitas Bivalvia di Kawasan Mangrove Perairan Bontolebang Kabupaten Kepulauan Selayar Sulawesi Selatan. Paper Presented at The Seminar Nasional MIPA, Bandung.

Morisita, M. 1959. Measuring of Interspecific Association and Similarity Between Communities. Memoirs of the Faculty of Science, Kyushu University, Biol, 3, 65-80.

Manuel,A.V., Hashimoto, K., Kurihara, T. 2025. Characteristics of Suspended Particulate Matter, Benthic Environmental Factors, and Their Relationship to Bivalvias. JARQ,59(3), 203-217.

Ompi, M., Boneka, F,B., Kaligis, E, Y., Kaunang,S,T. 2023a. Peran Kerang Kotak Penyaring Pratikel Makrobenthos di Agregasi Karang Pesisir Tiwoho dan Bengkol Sulawesi Utara. Bawal 15(1), 1-13. DOI:https/10.15578/bawal.15.1.2023.1-13

Ompi,M.,Boneka,F,B.,Kaligis,E,Y.,Kaunang, S, T.2023b.Settlement of the tropical box mussel,Septifer bilocularis: effects of site, position, and substratum. Aquaculture Research 2023: 4498844. DOI: 10.1155/ 2023/4498844.

Ompi, M., Paruntu, C., Roeroe, K.A., Kaunang, S.T.,Robot, N. 2025. Reproduksi Ekologi Bivalvia. Deepublish, Jokyakarta 80 hal.

Ompi, M., Boneka, B.F., Tilaar, S., Kaunang, T.S. 2026. Size Variation and Survival after Transplantation of the Tropical Box Marine Mussel Septifer bilocularis on The Three Coastal Sites of North Sulawesi, Indonesia. Journal of Fisheries and Environment, 50(1), 43-55.

Palit, Boneka, F. B., Kaligis, E. Y., Rimper, J.R.T.S.L, Lumenta, C., Ompi 2021.Rekruitment Tropical Box Mussels, Septifer Bilocularis in Tiwoho CoastalArea.Jurnal Ilmiah Platax,9(2),321-327. DOI:https://doi.org/10.35800/jip.v9i2.35726