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Suyono ,, Suyono
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Salinitas dan Flake Serasah Daun Mangrove yang Berbeda Mempengaruhi Pertumbuhan (Dendronereis pinnaticiris) Hartanti, Ninik Umi; ,, Suyono
OSEATEK Vol 9, No 01 (2015): Juni
Publisher : OSEATEK

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Abstract

Result of the research showed that leaf litter of A. Marina contained 19.48% which was higher than that of R. stylosa that contained 5,86%, while R. stylosa contained lipid of 2.31 % dry weight, which was higher than that of A marina that contained lipid of 1.96 % dry weight. R. stylosa contained the highest fibre. Survival rate of PlS1 66.667 %, P1S2 100 %, P2S1 100 %, P2S2 100%, P3S1 was 100% and P3S2 was 100%. The different feed types affected body weight increment, where P1S1 was 0 mg, PlS2 was 227 mg, P2S1 was 27,9 mg P2S2 was 143 mg and P3S1 was 134 mg and P3S2 was 93 mg. The average number of  posterior segment generated was P1S1 (5,08), P1S2 (59,8), P2S1 (18,33), P2S2 (47,7) and P3S1 (40) P3S2 (33,5). Feeding artificial diet made from leaf mangrove litter as raw material increased growth but did not increase survival rate of the worm. Growth of the nereid worm fed with flake composed from leaf litter of A marina anda 30 ppt salinity was greater than that fed with flake made of leaf litter another and the mixture of leaf litter of both mangrove plant species.Key Word : nereid worm, leaf litter of mangrove plant, feed
Pemetaan Degradasi Ekosistem Mangrove dan Abrasi Pantai Berbasis Geographic Information System di Kabupaten Brebes-Jawa Tengah ,, Suyono; ,, Supriharyono; Hendrarto, Boedi; Radjasa, Ocky Karna
OSEATEK Vol 9, No 01 (2015): Juni
Publisher : OSEATEK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (527.556 KB)

Abstract

Issu degradasi mangrove dan abrasi pantai secara ekologis, sosial, ekonomis senantiasa aktual . Penelitian ini bertujuan untuk mengetahui kondisi vegetasi mangrove dan tingkat abrasi pantai di wilayah Kabupaten Brebes. Penelitian menggunakan teknologi GIS (Geographic Information System) dan inderaja melalui interpretasi dan analisis citra satelit Landsat 7 TM. Penentuan model keeratan hubungan dinamika faktor ekologis dengan degradasi mangrove dan abrasi pantai dilakukan melalui analisis system dinamis dengan bantuan soft ware Power Sim 2.0. Hasil intepretasi data satelit menggunakan metode NDVI (Normalized Difference Vegetation Index) menunjukan bahwa luasan mangrove di wilayah pantai Kabupaten Brebes tinggal 243.20 hektar tersebar di wilayah pantai Kecamatan Losari 26.56 ha., di Kecamatan Tanjung 5.60 ha., di Kecamatan Bulakamba 35.42 ha., di Kecamatan Wanasari 14.31 ha. dan di Kecamatan Brebes 161.31 ha.. Nilai kerapatan vegetasi mangrove secara total untuk Kecamtan Losari, Tanjung, Bulakamba,Wanasari dan Kecamatan Brebes (Kaliwlingi dan Randusanga Wetan) berturut-turut 10.79 ; 19.46 ; 18.50 ; 13.03 ; 36.43 dan 22.79 individu/ha. dengan kategori berturut-turut : sangat jarang, jarang , jarang, jarang, sedang dan jarang. Di wilayah penelitian dijumpai tiga jenis vegetasi mangrove dalam jumlah layak hitung yakni : Rhizophora mucronata, Rhizophora apiculata , Avicennia marina dimana Rhizophora mucronata memiliki kepadatan paling tinggi (35.73 individu/ha). di Kaliwlingi, Kecamatan Brebes.Degradasi mangrove dan abrasi di wilayah pantai Kabupaten Brebes masing-masing 68 ha./tahun dan 63ha./tahunKata Kunci : Degradasi, mangrove, abrasi, NDVI, Rhizophora
Co-Authors Boedi Hendrarto Ninik Umi Hartanti Ocky Karna Radjasa Supriharyono ,, Supriharyono