Home⇛DAVAO RESEARCH JOURNAL⇛vol. 16 no. 4 (2025)

First Evidence of Microplastic Ingestion in Commercially Consumed Marine Gastropods (Conomurex luhuanus and Canarium spp.) from Davao Gulf

Ma. Kristine Limosnero | Ana Ocenar

Discipline: environmental sciences

 

Abstract:

This study assessed the presence of microplastics (MPs) in the tissues of commercially consumed marine gastropods from the Davao Gulf. A total of 180 individuals were examined. One MP was detected in Conomurex luhuanus (“Liswe”) and one in Canarium spp. (“Aninikad”) from Davao del Sur, while two MPs were detected in C. luhuanus from Davao Occidental. The particles were classified into three categories: fibers, films, and fragments, with sizes ranging from 0.8 to 2.0 mm. Of the four MPs identified, three were blue. Microplastic density was 0.07 particles per individual in both C. luhuanus and Canarium spp. from Davao del Sur, and 0.13 particles per individual in C. luhuanus from Davao Occidental. FTIR spectroscopy confirmed polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polypropylene (PP) as the predominant polymers. These findings provide preliminary evidence of microplastic contamination in marine gastropods from the Davao Gulf, highlighting potential ecological impacts and raising concerns about food safety, while also underscoring the need for improved plastic waste management and monitoring of seafood resources in the region.



References:

  1. Abiñon, B. S. F., Camporedondo, B. S., Mercadal, E. M. B., Olegario, K. M. R., Palapar, E. M. H., Ypil, C. W. R., & Garces, J. J. C. (2020). Abundance and characteristics of microplastics in commercially sold fishes from Cebu Island, Philippines. International Journal of Aquatic Biology, 8(6), 424–433.
  2. Abreo, N. A. S., Macusi, E. D., Blatchley, D. D., & Cuenca, G. C. (2016). Ingestion of marine plastic debris by green turtle (Chelonia mydas) in Davao Gulf, Mindanao, Philippines. Philippine Journal of Science, 145(1), 17–23.
  3. Barboza, L. G. A., Vethaak, A. D., Lavorante, B. R., Lundebye, A. K., & Guilhermino, L. (2018). Marine microplastic debris: An emerging issue for food security, food safety and human health. Marine Pollution Bulletin, 133, 336–348.
  4. Bersaldo, M. J., Lacuna, M. D., & Macusi, E. D. (2022). Status of mangrove clam (Anodontia philippiana Reeve, 1850) in Baganga, Davao Oriental, Philippines. ABAH Bioflux, 14(2), 55–66.
  5. Bersaldo, M. J. I., Lacuna, M. L. D., Orbita, M. L. S., Tampus, A. D., Avenido, P. M., & Macusi, E. D. (2024). First evidence of potential microplastic ingestion of yellow striped goat fish Upeneus vitattus (Forsskal, 1775) caught in Malita, Davao Occidental, Philippines. ILMU KELAUTAN: Indonesian Journal of Marine Sciences, 29(1).
  6. Bilugan, Q. M., Limbago, J. S., & Gutierrez, R. L. (2021). Detection and quantification of microplastics from cultured green mussel Perna viridis in Bacoor Bay, Cavite, Philippines. Sustinere: Journal of Environment and Sustainability, 5(2), 90–102.
  7. Bucol, L. A., Romano, E. F., Cabcaban, S. M., Siplon, L. M. D., Madrid, G. C., Bucol, A. A., & Polidoro, B. (2020). Microplastics in marine sediments and rabbitfish (Siganus fuscescens) from selected coastal areas of Negros Oriental, Philippines. Marine Pollution Bulletin, 150, 110685.
  8. Curren, E., Yu, D. C. Y., & Leong, S. C. Y. (2024). From the seafloor to the surface: A global review of gastropods as bioindicators of marine microplastics. Water, Air, and Soil Pollution, 235(1), 45.
  9. Dawson, A. L., Santana, M. F., Miller, M. E., & Kroon, F. J. (2021). Relevance and reliability of evidence for microplastic contamination in seafood: A critical review using Australian consumption patterns as a case study. Environmental Pollution, 276, 116684.
  10. De-la-Torre, G. E., Apaza-Vargas, D. M., & Santillán, L. (2020). Microplastic ingestion and feeding ecology in three intertidal mollusk species from Lima, Peru. Revista de Biología Marina y Oceanografía, 55(2), 167–171.
  11. Department of Environment and Natural Resources. (2003). DENR Administrative Order No. 2003-30: Implementing rules and regulations for the Philippine Environmental Impact Statement (EIS) System. Environmental Management Bureau. https://www.denr.gov.ph/images/pdf_content/dao2003-30.pdf
  12. Frias, J. P., & Nash, R. (2019). Microplastics: Finding a consensus on the definition. Marine Pollution Bulletin, 138, 145–147.
  13. Gago, J., Filgueiras, A., Pedrotti, M. L., Caetano, M., & Frias, J. (2019). Standardised protocol for monitoring microplastics in seawater. Available online: https://repository.oceanbestpractices.org/handle/11329/1077 (accessed 29 October 2023).
  14. Geyrozaga, J. I. (2023). Microplastics in bivalves from selected coastal environments and public markets in Davao Region, Philippines (Unpublished master’s thesis). University of Southeastern Philippines.
  15. Gigault, J., Halle, A. T., Baudrimont, M., Pascal, P.-Y., Gauffre, F., Phi, T.-L., Hadri, H. E., Grassl, B., & Reynaud, S. (2018). Current opinion: What is a nanoplastic? Environmental Pollution, 235, 1030–1034. https://doi.org/10.1016/j.envpol.2018.01.024
  16. Hussain, M., Blache, D., & Maloney, S. K. (2024). Impact of microplastics on the physiology of benthos. In Microplastic pollution (pp. 363–372). Singapore: Springer Nature Singapore.
  17. Jiang, B., Kauffman, A. E., Li, L., McFee, W., Cai, B., Weinstein, J., & Xiao, S. (2020). Health impacts of environmental contamination of micro- and nanoplastics: A review. Environmental Health and Preventive Medicine, 25, 1–15.
  18. Lahoy, N. M., & Antonio, E. S. (2025). Microplastic occurrence in the gastrointestinal tract of rabbitfish (Siganus canaliculatus) in Pujada Bay, Philippines. Davao Research Journal, 16(2), 49–61.
  19. Maynawang, I. S., & Macusi, E. D. (2023). Catch assessment of commercially important gastropods in Guang-Guang, Mati City, Davao Oriental, Philippines. Academia Biology, 1(1).
  20. Mejos, J. S., Cotamora, G. D., Vidal, P. M., Baguio-Gonzales, A., Tito, O. D., & Alejos, M. S. (2023). Microplastic abundance and characteristics in rabbitfish (Siganus guttatus) and parrotfish (Scarus ghobban) from the local market of Zamboanga City, Philippines. Uttar Pradesh Journal of Zoology, 44(15), 89–96.
  21. Millet, H., Vangheluwe, P., Block, C., Sevenster, A., Garcia, L., & Antonopoulos, R. (2018). The nature of plastics and their societal usage. Plastics and the Environment, 1–20.
  22. Navarro, C. K. P., Arcadio, C. G. L. A., Similatan, K. M., Inocente, S. A. T., Banda, M. H. T., Capangpangan, R. Y., ... & Bacosa, H. P. (2022). Unraveling microplastic pollution in mangrove sediments of Butuan Bay, Philippines. Sustainability, 14(21), 14469.
  23. Navarro, C. K. P., Arcadio, C. G. L. A., Capangpangan, R. Y., & Bacosa, H. P. (2024). Evidence of microplastic uptake by mud clam (Polymesoda erosa) in the mangrove sediments of Butuan Bay, Mindanao, Philippines. Mindanao, Philippines.
  24. Nikhil, V. G., Amritha, G. G., Ranjeet, K., & Varghese, G. K. (2024). Distribution of microplastics in seafloor sediments and their differential assimilation in nearshore benthic molluscs along the south-west coast of India. Environmental Pollution, 344, 123350.
  25. Olubusoye, B. S., Cizdziel, J. V., Wontor, K., Heinen, E., Grandberry, T., Bennett, E. R., & Moore, M. T. (2024). Removal of microplastics from agricultural runoff using biochar: A column feasibility study. Frontiers in Environmental Science, 12, 1388606.
  26. Onda, D. F. L., Gomez, N. C., Purganan, D. J. E., Bitalac, J. M. S., Balboa, K. J. N., Bonita, J. D. P., Ignacio, P. S. P., Alindayu, R. C., Licnachan, L. O. C., Luzadas, R. L., & Galang, J. M. M. (2023). Handbook for quantifying plastics in the marine environment [Unpublished manuscript]. Microbial Oceanography Laboratory, Marine Science Institute, University of the Philippines Diliman.
  27. Porter, A., Godbold, J. A., Lewis, C. N., Savage, G., Solan, M., & Galloway, T. S. (2023). Microplastic burden in marine benthic invertebrates depends on species traits and feeding ecology within biogeographical provinces. Nature Communications, 14(1), 8023.
  28. Rahmatsyah, R., Syarifuddin, S., Juliani, R., Azzahra, A. F., Rahmeida, S., & Batubara, A. S. (2024). Microplastic contamination of four important commercial fish in east coast of North Sumatera Province, Indonesia. Philippine Journal of Fisheries, 31(2), 2023-0056.
  29. Renzi, M., Specchiulli, A., Blašković, A., Manzo, C., Mancinelli, G., & Cilenti, L. (2019). Marine litter in stomach content of small pelagic fishes from the Adriatic Sea: Sardines (Sardina pilchardus) and anchovies (Engraulis encrasicolus). Environmental Science and Pollution Research, 26(3), 2771–2781.
  30. Similatan, K. M., Arcadio, C. G. L. A., Navarro, C. K. P., Capangpangan, R. Y., & Bacosa, H. P. (2023). Microplastic ingestion by adult milkfish (Chanos chanos Forsskål, 1775) in aquaculture system: The case of Butuan Bay, Philippines. Marine Pollution Bulletin, 194, 115409.
  31. Thushari, G. G. N., & Senevirathna, J. D. M. (2020). Plastic pollution in the marine environment. Heliyon, 6(8).
  32. Van Cauwenberghe, L., & Janssen, C. R. (2014). Microplastics in bivalves cultured for human consumption. Environmental Pollution, 193, 65–70.
  33. Van Cauwenberghe, L., Devriese, L., Galgani, F., Robbens, J., & Janssen, C. R. (2015). Microplastics in sediments: A review of techniques, occurrence and effects. Marine Environmental Research, 111, 5–17. https://doi.org/10.1016/j.marenvres.2015.06.007
  34. Verzosa, R. C., Katipunan, F. J. M., Lumangyao, J. G. B., & Antonio, E. S. (2024). Solid waste management awareness and practices in coastal communities. Davao Research Journal, 15(3), 60–77.
  35. Wibowo, Y. G., Maryani, A. T., Rosanti, D., & Rosarina, D. (2019). Microplastic in marine environment and its impact. Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam, 16(1). https://doi.org/10.31851/sainmatika.v16i1.2884
  36. Zhang, F., Xu, J., Zhu, L., Peng, G., Jabeen, K., Wang, X., & Li, D. (2021). Seasonal distributions of microplastics and estimation of the microplastic load ingested by wild caught fish in the East China Sea. Journal of Hazardous Materials, 419, 126456.
  37. Ziani, K., Ioniță-Mîndrican, C. B., Mititelu, M., Neacșu, S. M., Negrei, C., Moroșan, E., ... & Preda, O. T. (2023). Microplastics: A real global threat for environment and food safety: A state of the art review. Nutrients, 15(3), 617.
  38. Zhong, X., Zhao, X., Qian, Y., & Zou, Y. (2018). Polyethylene plastic production process. Insight-Material Science, 1(1), 104.

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