Coral Cay Conservation Brief communication on the Crown-of-thorns Seastar (Acanthaster spp.) densities in the municipalities of San Francisco, Liloan and Pintuyan, Southern Leyte, Philippines Authors: Chantel Elston1, Thomas Dallison2 1 Project Scientist, Coral Cay Conservation, Napantao Dive Resort, 6613, San Francisco, Southern Leyte, Philippines. Email:
[email protected] 2 Corresponding author: Head of Science, Coral Cay Conservation, The Kiln, Grange Road, Tongham, Surrey, GU10 1DJ, United Kingdom. Email:
[email protected] October 2019 Introduction that a 15m distance would result in a 30-50% A rapid assessment was initiated in 2019 by the chance of successful fertilization. Post-spawning Southern Leyte State University (SLSU) to assess and successful fertilisation, the larval stage of the potential for a crown-of-thorns Seastar COTS is typically 11 days but can decrease or (COTS) (Acanthaster spp.) outbreak in Sogod increase from 9 to 42 days depending on Bay, Southern Leyte. The aim was to identify and environmental conditions, predominantly to quantify the extent of a COTS outbreak in driven by phytoplankton abundance. selected municipalities of Sogod Bay. The outbreak threshold was defined as 25-30 COTS are a highly successful predator of COTS/ha (which equates to 0.25 COTS/100m2) Scleractinian corals with individual size and life (Napala per comms. 2019). Coral Cay phase being a key factor in prey-preference and Conservation (CCC) were invited by the feeding rates. Once the CoTS larvae have settled honourable Ma’am Eva of the Provincial on benthic substratum, showing preference for Environment and Natural Resources coralline algae and consolidated rubble (actively Management Office (PENRMO) to assist with avoiding predatory corals) ([Lucas 1975]), this assessment.