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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2018, Vol. 6, Issue 3, Part A

Diversity and abundance of economically important bivalves in north-western Bohol, Philippines


Author(s): Margie P Vito

Abstract: Diversity and abundance of bivalves found in mangroves and seagrass ecosystems of Northwestern, Bohol, Philippines were studied for five months using line transect method. Physico-chemical parameters such as depth, temperature, pH and dissolved oxygen in relation to occurrence of bivalves were also determined using CCA analysis. A total of 35 bivalve species were identified belonging to six orders, 14 families and 23 genera. Diversity index was higher in Calape (3.032) than Clarin (2.608) and Tubigon (2.607). This diversity index means that bivalves in Northwestern Bohol were in moderate condition. Meanwhile, the effect of earthquake was evident in the general evenness where Calape (0.63) was the highest while Clarin and Tubigon had similar result with 0.42 evenness index. This evenness index described ecological equilibrium in the community in which the value near to 1.00 means community is stable. Hence, Northwestern Bohol had unstable bivalve community. In terms of abundance, Clarin was the highest with 1085 total individuals. This was followed by Tubigon with 1022 and lowest in Calape with 853 total bivalves collected. Top five most abundant bivalves were Scapharca indica (24%), Scapharca cornea with 22% followed by Anomalocardia squamosa (7.9%), Gafrarium tumidum (6.5%) and Trachycardium rugosum (6%) respectively. These species of economically important bivalves with high abundance and distribution may be monitored for sustainability of wild stocks in the area. There may be a law regulating the intense collection of economically important bivalves in Northwestern Bohol to mitigate loss of these organisms knowing their unstable state.

Pages: 44-48  |  633 Views  81 Downloads

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How to cite this article:
Margie P Vito. Diversity and abundance of economically important bivalves in north-western Bohol, Philippines. International Journal of Fisheries and Aquatic Studies. 2018; 6(3): 44-48.
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