Dieting Pattern Of Refused Fish Type Of Non-Acropora Coral In Sempu Island Of Natural Reserves, Malang District

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Guntur, Defrian Marza Arisandi

Abstract

Sempu Island Nature Reserve is a uniqueresource, becauseitisformedfromtheAtoll. The percentageoflivecoralcover in the Sempu Island Nature Reserve has increased over a periodoftwoyears. Basedontheformofgrowth (lifeform) rockcorals (scleractinian) are dividedintotwocategories, namelyAcroporaand Non-Acroporacorals. Acroporaand Non-Acroporacoralshave a difference in thestructureoftheirskeleton. Reeffish are groupsoffishthatlive in associationwithcorals. One ofthe natural factorscausingdamagetocoralreefsisbioeroders. One exampleof a bioeroderiscorallivorousfish. The data taken in this study, namelyoceanographic data, data ontheconditionof non-Acroporacoralcover, and data onreeffish. Oceanographic data taken, namely, temperature, salinity, DO, pH, andbrightness. Data ontheconditionof non-Acroporacoralcover were takenusingthe Line InterceptTransect (LIT) method. Data onreeffish were takenusingtheUnderwater Visual Census (UVC) method. Takingreeffish data isassistedbyanunderwatercamera. Data processingisdoneusing Ms. software. Excel 2016 and Minitab18. The conditionof non-Acroporacoralcover in Sempu Island Nature Reserve, Malang Regency isincluded in thedamagedcategorywith a percentageof 20.01%, becausethewaterconditions are still not supportiveforcoralgrowth. The compositionofreeffishfound in Non-Acroporacoralsbasedontheir diet in Sempu Island Nature Reserve, Malang Regency, is 79.51% herbivores, 9.29% carnivores, 10.16% corallivores, and 1.37% omnivores. The relationshipbetweenthepercentageof non-Acroporacoralcoverandtheamountoffishfedonthereefisverystrongwith a valueof R2 = 0.9793, sothatthepercentageof non-Acroporacoralcoverandtheamountoffishfedisdirectlyproportional.

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