Estimating coral reef rugosity using shadow cues
Abstract
An important element for the productivity of reef-based fisheries is rugosity. Rugosity describes how well a reef acts as shelter for juvenile fish. The traditional method of measuring rugosity is tedious and requires a scuba diver. A faster, noncontact method for estimating rugosity is by getting the percent shadow. The relative rugosities from shadow correctly show which row within a quadrat is more rugose, as verified visually by a marine scientist and by comparison with results of the chain intercept method. Further studies should consider color variations due to changes in bathymetry to account for large scale spatial relief.
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Strengthening physics research and education for a brighter tomorrow
25-27 October 2010, MERALCO Management and Leadership Development Center, Antipolo City