Diversity of Harvested Gastropods in Guang-Guang, Mati City, Davao Oriental, Philippines

  • Imee S. Maynawang Fisheries Catch Assessment Project, Davao Oriental State University, Mati City, Davao Oriental, Philippines. College of Marine and Allied Sciences (CMAS), Mindanao State University-Naawan, Naawan, Misamis Oriental, Philippines
  • Edison D. Macusi Faculty of Agriculture and Life Sciences, Davao Oriental State University, Mati City, Davao Oriental, Philippines
  • Nur Fadli Faculty of Marine and Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia
  • Ivy M. Nallos Faculty of Agriculture and Life Sciences, Davao Oriental State University, Mati City, Davao Oriental, Philippines. Tuna Traceability Project, University of the Philippines Mindanao, Davao City, Philippines

Abstract

Gastropods are a highly abundant group of mollusks in the marine environment.  Marine gastropods primarily function as prey for other animals, grazers which help recycle nutrients and increase bioturbation activities in the marine ecosystem. Edible gastropods are significant to the economy of coastal communities. However, overexploitation leads to harming the population of marine gastropods. The study aimed to determine the diversity of gastropods harvested at Guang-guang, Mati City, Davao Oriental. It also assessed the abundance of the identified gastropods in the area. This study used purposive sampling to enroll gleaners (N = 30) who collected shells and monitored their gastropod harvest. The harvested gastropods were segregated, counted, and identified with the help of gleaners. A total of ten gastropod species were identified from the family of Strombidae, Conidae, Neritidae, Cypraeidae, and Turbinidae. The most abundant group after harvest was Canarium urceus, with a relative abundance of 67%, followed by Ilyanassa obsoleta, with 22%. However, the least harvested species was Nerita, with a relative abundance of 0.18%. The findings revealed that the harvested gastropods in Guang-guang have a diversity index of 0.99, indicating a low diversity of gastropods in the area. This low diversity could mean the area experienced overexploitation through time as gleaners have heavily harvested gastropods. With that, it is highly recommended that conservation should be prioritized to preserve the seashells.

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Published
2023-10-31
How to Cite
MaynawangI. S., MacusiE. D., FadliN., & NallosI. M. (2023). Diversity of Harvested Gastropods in Guang-Guang, Mati City, Davao Oriental, Philippines. HAYATI Journal of Biosciences, 31(1), 153-160. https://doi.org/10.4308/hjb.31.1.153-160

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