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Species diversity and abundance of pomacentridae in the coral reef of the Sunda strait SASANTI R. SUHARTI Abstract SPECIES DIVERSITY AND ABUNDANCE OF POMACENTRIDAE IN THE CORAL REEF OF THE SUNDA STRAIT. Visual census from April 1987 to December 1988 at 15 different stations in Peucang and Panaitan waters (Sunda strait), the depth of which ranged from 3 m to 10 m, recorded 54 species (14 genera) of pomacentrid fishes. Of the recorded fishes, 45 species were collected from 3 m depth and 40 species were collected from 10 m depth. Eight species were found dominant for both depths. The most dominant species in the 3 m depth was Pomacentrus bankanensis, while that in the 10 rn depth was Dascylus aruanus. The highest abundance was found at station 15 for both the 3 m and the 10 m depths. reaching 405.66 individuals/500 m2 and 401.65 individuals/500 m2 respectively. Statistical analysis using ANOVA indicated that there were significant differences between both number of individuals and species diversity among stations. In term of depth, however, only the number of individuals was significantly different. Regression analysis indicated that number of individuals at 3 m depth was positively correlated with percentage of substrate. In the 10 m depth, on the other hand, a high correlation was suggested between species diversity and substrate percentage.

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KEANEKARAGAMAN JENIS DAN KELIMPAHAN POMACENTRIDAE DI TERUMBU KARANG PERAIRAN SELAT SUNDA SASANTI R. SUHARTI Sebanyak 54 jenis ikan pomacentrid yang terdiri dan 14 marga ditemukan di kedalaman 3 dan 10 m di 15 stasiun yang berbeda di perairan P. Peucang dan P. Panaitan dengan menggunakan metode sensus visual pada bulan April 1987 - Desember 1988. Dari jurnlah tersebut, 45 jenis berasal dari kedalaman 3 m dan 40 jenis berasal dari kedalaman 10 m. Pada masing-masing kedalaman dijumpai delapan jenis yang mempakan jenis dominan. Pomacentrus bankanensis rnerupakan jenis dominan di kedalaman 3 m sedangkan di kedalaman 10 m ditempati oleh Dascyllus aruanus. Kelimpahan tertinggi dijumpai di stasiun UK 15 baik pada kedalaman 3 m maupun 10 m, masing-masing dengan 405,66 individu/500 m2 dan 401,65 individu/500 m. Analisis statistik menunjukkan bahwa jumlah individu dan kekayaan jenis antar stasiun rnenunjukkan perbedaan yang nyata. Sedangkan antar kedalaman hanya jumlah individu saja yang menunjukkan perbedaan nyata. Analisis regresi menunjukkan bahwa pada kedalaman 3 m, juralab individu berkorelasi positif dengan karang bercabang, dan sebagian besar tingkat tropik berkorelasi tinggi terhadap persentase tutupan substrat. Keanekaragaman jenis pada kedalaman 10 m berkorelasi sangat tinggi dan positif dengan persentase tutupan substrat.

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