Prevalensi, Insidensi dan Perkembangan Black-band Disease pada Karang Scleractinia (Montipora spp) di Perairan Dangkal Gugusan Pulau Pari. (Indonesian)

Prevalence, Insidence and Progression of Black-band Disease on Scleractinian Coral (Montipora spp) in Shallow Water of Pari Islands. (English)

Black-band disease (BBD) is a persistent disease that cause the decline of the coral reef ecosystems, which is still limitedly recorded in Indonesia, including in Pari Island, Thousand Islands. The objectives of this study were to determine progression, prevalence and incidence BBD on Montipora spp in shallow water of Pari Islands. Coral cover were estimated using line intercept transect (LIT) whereas the prevalence and incidence of BBD were carried out by using belt transect method with 1 m left and right of tape as long 20 m with 3 replications recorded approximately every two months. BBD progression was documented with a digital photograph method, the photograph of affected area of each coral was taken each day for 2 weeks. BBD was found to be spread in the surveyed area. The result show that prevalence and incidence of BBD showed a positive exponential relationship with water temperature. During the observation both prevalence and incidence increased on May transitional season (wet-dry). The highest prevalence was found at 5, 96 percent and whereas the maximum disease progression found at 0, 46 cm.day^-1, in this rate indicate that BBD could strongly cause coral death. [ABSTRACT FROM AUTHOR]

Penyakit pita hitam (BBD) adalah penyakit persisten merupakan salah satu penyebab kerusakan pada ekosistem terumbu karang yang saat ini masih sedikit terdata di perairan Indonesia termasuk di Pulau Pari, Kepulauan Seribu. Penelitian ini bertujuan untuk mengetahui perkembangan infeksi, insidence dan prevalensi BBD pada karang Montipora spp perairan dangkal di Gugusan Pulau Pari. Estimasi persentase penutupan karang dilakukan dengan teknik transek garis Line Intercept Transect (LIT), sementara prevalensi dan insidensi BBD dilakukan dengan menggunakan transek sabuk 1 m ke kiri dan ke kanan dengan ukuran panjang 20 m dan 3 ulangan, data diambil kurang lebih selama 2 bulan sekali. Perkembangan BBD didokumentasikan setiap hari dengan metode potografi digital selama 2 minggu. BBD ditemukan tersebar di daerah pengamatan. Hasil menunjukkan bahwa prevalensi dan insidensi memiliki hubungan eksponensial yang positif dengan suhu. Selama pengamatan menunjukkan bahwa prevalensi dan insidensi meningkat pada bulan Mei yang merupakan musim peralihan antara musim hujan dan musim panas. Prevalensi tertinggi dijumpai dengan nilai 5, 96 persen dan progres penyakit maksimum adalah 0, 46 cm.hari^-1, pada kondisi ini BBD berpotensi menyebabkan kematian karang. [ABSTRACT FROM AUTHOR]

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