Benthic molluscs in seagrass beds of barangay Liangan East and barangay Esperanza, Bacolod, Lanao del Norte, Northern Mindanao, Philippines

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Research Paper 01/09/2018
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Benthic molluscs in seagrass beds of barangay Liangan East and barangay Esperanza, Bacolod, Lanao del Norte, Northern Mindanao, Philippines

Kathlyn Joy D. Lumayag, Ronaldo R. Orbita, Maria Lourdes Dorothy G. Lacuna
Int. J. Biosci.13( 3), 120-131, September 2018.
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Seagrass meadows commonly occurred in intertidal areas and play a vital role in the ecosystem as source of food, refuge and nursery ground for marine fauna. Considering the benefits they provide, seagrass beds supports a variety of organisms which are often exploited by humans. As a result, the population of seagrass associated fauna, specifically the molluscs, are always vulnerable to the negative impacts of anthropogenic pressures. Owing to this, a call for active watch and monitoring of these fauna is needed, hence this study was carried out in order to provide knowledge on the diversity, abundance and distribution of molluscs. Samplings were done during spring low tide by employing the transect-quadrat method. A total of 25 mollusc species were identified, of which 23 were classified under Class Gastropoda and 2 were classified under Class Bivalvia. Diversity indices showed high diversity in both stations where species were observed to be evenly distributed. Comparing the number of edible species between stations revealed station 1 to be abundant than station 2 and it is suggested that this difference may be attributed to the on-going gleaning activities. The distribution of molluscan species showed particular preference to a specific stratum in the intertidal flat which we believed is governed by their feeding habits and uncontrolled fishing activity.


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