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Table 4.1 Mean percentage of liv<strong>in</strong>g and dead substrate cover <strong>in</strong> Apo Island Fish Sanctuary,<br />

Negros Oriental, various years<br />

1981 a<br />

1982 a 1992 b<br />

2002 b<br />

1983 1992 2002 1981 a 1982 a 1983 a 1985 a 1992 b 2002 b<br />

1992 2002<br />

Non-liv<strong>in</strong>g substrate<br />

Sand and silt 9.3 24.0 9.5 13.5 8.8 11.8 11.7 18.6 19.1 16.6 15.9 11.7 14.6 6.3 1.7<br />

Coral rubble 10.8 8.8 13.6 4.2 9.4 6.5 4.0 2.8 2.7 9.5 10.9 17.6 7.3 7.1 0.0<br />

Rock and block 4.9 1.5 11.9 6.3 1.9 9.3 8.5 17.2 13.4 19.1 2.7 12.9 7.2 14.7 19.3<br />

White dead stand<strong>in</strong>g coral 8.2 8.3 1.9 0.2 16.1 2.6 0.2 2.7 4.2 5.4 4.9 3.7 0.1 3.2 0.0<br />

Dead coral with algae 0.0 0.0 0.0 7.3 0.0 0.0 4.4 0.0 0.0 0.0 0.0 0.0 5.4 0.0 0.0<br />

SUBTOTAL non-liv<strong>in</strong>g substrate<br />

Corals:<br />

Hard coral:<br />

33.2 42.6 36.9 31.5 36.2 30.2 28.8 41.3 39.4 50.6 34.4 45.9 34.6 31.3 21.0<br />

Branch<strong>in</strong>g 13.7 16.0 13.1 22.1 18.8 15.4 22.7 12.6 12.4 13.1 8.5 7.1 14.2 14.4 14.0<br />

Massive 17.7 16.6 18.8 23.8 16.9 15.8 10.6 14.7 14.2 11.6 4.7 12.9 9.6 13.2 1.3<br />

Flat/encrust<strong>in</strong>g 2.0 2.1 13.5 6.0 0.0 3.1 1.9 0.6 0.0 1.6 2.8 4.4 4.9 5.8 0.0<br />

Foliose/cup 3.0 0.0 2.5 4.7 8.1 3.8 2.3 0.0 0.0 1.1 4.0 3.9 1.4 6.0 2.7<br />

Subtotal hard coral 36.4 34.7 47.9 56.6 43.8 38.1 37.6 27.9 26.6 27.4 20.0 28.3 30.1 39.4 18.0<br />

Soft coral 30.4 22.7 15.3 9.4 20.0 31.7 31.5 30.8 34.0 22.1 45.5 25.9 32.6 29.3 60.0<br />

SUBTOTAL corals<br />

O<strong>the</strong>rs<br />

66.8 57.4 63.2 66.1 63.8 69.8 69.1 58.7 60.6 49.5 65.5 54.2 62.7 68.7 78.0<br />

O<strong>the</strong>r animals ~ (0.4) ~ 0.1 ~ ~ 0.0 ~ (1.5) (1.2) ~ ~ 0.0 ~ 0.0<br />

Seagrasses<br />

Algae<br />

~ ~ ~ 0.0 ~ ~ 0.4 ~ ~ ~ ~ ~ 0.0 ~ 0.0<br />

Fleshy ~ ~ ~ 1.0 ~ ~ 0.4 ~ ~ ~ ~ ~ 0.3 ~ 0.7<br />

Turf ~ ~ ~ 0.7 ~ ~ 0.9 ~ ~ ~ ~ ~ 0.2 ~ 0.0<br />

Corall<strong>in</strong>e ~ ~ ~ 0.3 ~ ~ 0.2 ~ ~ (0.3) ~ ~ 0.2 ~ 0.0<br />

Sponges ~ ~ ~ 0.4 ~ ~ 0.2 ~ ~ ~ ~ ~ 2.1 ~ 0.3<br />

SUBTOTAL o<strong>the</strong>rs ~ (0.4) ~ 2.4 ~ ~ 2.1 ~ (1.5) (1.5) ~ ~ 2.7 ~ 1.0<br />

GRAND TOTAL<br />

O<strong>the</strong>r relevant <strong>in</strong><strong>for</strong>mation<br />

100 100 100 100 100 100 100 100 100 100 100 100 100 100 100<br />

Slope (degrees) ~ ~ ~ 11.7 o<br />

~ ~ 3.8 o<br />

~ ~ ~ ~ ~ 7.7 o<br />

~ 30.0 o<br />

Type of Substrate SCUBA Snorkel<br />

Topography* (m) 2.2 2.0 3.0 2.1 3.3 2.0 1.6 1.9 1.7 2.4 2.0 2.3 1.8 2.2 ~<br />

Depth range/average (m) 0.7-15 1.1-20.7 4-8 7.0 ~ 4-7 3.1 0.8-6 0.4-6 0.3-15 3-14 6-7 7.7 ~ ~<br />

Visibility (m) ~ ~ ~ 23.2 ~ ~ 20.9 ~ ~ ~ 18.7 ~ 18.5 ~ ~<br />

Sample size (transects/stations) ~ 5 ~ 15 11 1 450 ~ ~ 3 3 7 9 12 225<br />

*Mean distance between lowest and highest po<strong>in</strong>t on <strong>the</strong> horizontal transect l<strong>in</strong>e<br />

~ No data<br />

c<br />

Sanctuary<br />

SCUBA Snorkel c<br />

South-West: Non-Sanctuary<br />

a - 50 m transects placed randomly and perpendicular to shore<br />

b - 50 m transects placed randomly and parallel to shore<br />

c - Random stations by each observer at 2 to 4-meter depth<br />

Source: Summary Field Report: Sav<strong>in</strong>g Philipp<strong>in</strong>e Reefs. Coral Reef Monitor<strong>in</strong>g Surveys <strong>for</strong> Conservation In Cebu, Negros Oriental and Siquijor, Philipp<strong>in</strong>es. March 23-31,<br />

2002. The Coastal Conseration and Education Foundation, Inc. and <strong>the</strong> Coastal Resource Management Project.<br />

Various reports over <strong>the</strong> years <strong>in</strong>dicate healthy coral cover <strong>for</strong> Apo Island. In 1977, <strong>the</strong><br />

Mar<strong>in</strong>e Science College of <strong>the</strong> University of <strong>the</strong> Philipp<strong>in</strong>es reported an excellent coral cover<br />

of 70 per cent <strong>for</strong> Apo Island. In 1983, coral cover was down to 64.3 per cent, but <strong>in</strong>creased<br />

to 65.4 per cent <strong>in</strong> 1995. Also, <strong>in</strong> 1981 and 1991, a lead<strong>in</strong>g Philipp<strong>in</strong>e mar<strong>in</strong>e scientist<br />

<strong>pro</strong>claimed <strong>in</strong> a report that 100 per cent of Apo Island’s coral cover was <strong>in</strong> good condition.<br />

Likewise, various fish censuses conducted at different periods reveal an <strong>in</strong>crease <strong>in</strong> <strong>the</strong> mean<br />

number of <strong>in</strong>dividuals <strong>for</strong> most types of species found <strong>in</strong> <strong>the</strong> area. S<strong>in</strong>ce <strong>the</strong> area was<br />

<strong>pro</strong>claimed <strong>pro</strong>tected <strong>in</strong> 1982, <strong>the</strong>re has been a decrease <strong>in</strong> fish<strong>in</strong>g pressure <strong>in</strong> <strong>the</strong> area. A<br />

visual fish count conducted by Russ and Alcala <strong>in</strong> 1996 showed strong positive correlations<br />

with mean density, mean species richness, and <strong>pro</strong>tection – both <strong>in</strong> <strong>the</strong> reserve and nonreserve<br />

areas.<br />

61

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