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"Tambak di Blanakan, Subang merupakan tambak tradisional yang mengandalkan pakan alami sebagai pakan biota. Oleh karena itu keberadaan serasah mangrove sangat penting bagi tambak di Blanakan, karena dapat meningkatkan produktivitas dan kesuburan tambak. Tujuan dari penelitian ini yaitu menghitung produktivitas dan kandungan nutrien (N dan P) pada serasah Avicennia sp. Penelitian ini dilakukan pada bulan April sampai Mei dan Agustus 2018 dan bertujuan untuk mengetahui produktivitas dan kandungan nutrien (N dan P) pada serasah Avicennia sp. serta hubungan antara kedua faktor tersebut dan parameter lingkungan. Pengambilan sampel dilakukan di pertambakan Blanakan, Subang, Jawa Barat pada siang hari dan menggunakan littertrap untuk menampung serasah pada masing - masing tambak.Hasil penelitian menunjukkan bahwa jumlah produksi serasah yang diproduksi oleh Tambak 1 yaitu 2,15 gr/m2/hari, Tambak 2 yaitu 2 gr/m2/hari dan Tambak 3 yaitu 1,7 gr/m2/hari. Berdasarkan analisis korelasi menunjukkan terdapat korelasi yang lemah antara variabel independen (produktivitas serasah mangrove dan parameter lingkungan) dengan kandungan N dan P. Namun dilain sisi, terdapat korelasi yang kuat antara curah hujan dengan kandungan P.......Blanakan ponds are traditional brackish water ponds that rely on natural feed for biota. Therefore the existence of mangrove leaflitter is very important for Blanakan ponds, because it can increase productivity and fertility of ponds. The purpose of this research is to calculate productivity and nutrient content (N and P) of Avicennia sp. leaflitter. This research was conducted in April, Mei and August 2018 and aimed to determine the relationship between the productivity of mangrove and nutrient content (N and P) of Avicennia sp. litterfall. Samples were collected in Blanakan, Subang, West Java, using leaflitter trap in each ponds.The result showed that the amount of leaflitter produced by Pond 1 was 2,15 gr/m2/day, Pond 2 was 2 gr/m2/day and Pond 3 was 1,7 gr/m2/day. Based on correlation analysis it showed that there were weak correlation between independent variabel (the production of mangrove and environment parameter) and nutrien (N and P) content. However there was strong correlation between rainfall and nutrien (P) content."

"Avicennia marina is one species used for building coastal ecosystem stabilization in Surabaya shores because of its tolerance to high salinity level and resistance to wave energy. Their existence is threatened by various factors i.e. land conversion, pollution and interisland bridge existence.  Growth of A. marina is currently limited by seed dormancy. In an effort to increase propagation efficiency, seed viability and vigor were compared based on collection dates and pericarp removal methods. The results showed no relationship between salinity levels of soaking water or seed buoyancy and seed viability or seed vigor. Collection dates may influence seed viability and vigor. Seeds collected in October and November germinated more quickly than those collected in December, although there were no differences in total germination. Hand-peeled seeds germinated more slowly than soaked seeds for all collections, but with no differences in total germination. Seeds collected in October and November grew more vigorously than those collected in December."

"Timbulnya black spot pada udang vaname Litopenaeus vannamei yang disebabkan oleh aktivitas enzim polifenoloksidase PPO menyebabkan penurunan jumlah konsumen yang mengonsumsi udang tersebut. Sodium metabisulfit selama ini digunakan sebagai penghambat laju black spot pada udang. Zat tersebut bersifat efektif tetapi memiliki efek samping yang merugikan manusia. Tujuan dari penelitian ini adalah mengetahui karakteristik ekstrak daun mangrove Avicennia marina dan potensinya dalam menghambat pembentukan black spot pada udang vaname Litopenaeus vannamei. Ekstrak dibuat dengan konsentrasi 1,5 dan 2 yang diimersi selama 15 menit dengan penyimpanan pada suhu 4oC selama 0, 3 dan 7 hari. Hasil penelitian menunjukkan ekstrak daun mangrove 2 memiliki efektivitas yang terbaik pada pengujian organoleptik kenampakan,tekstur,sensori , TVB dan ALT dibandingkan dengan ekstrak daun mangrove 1,5 dan kontrol.

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Black spot appearance on vamame shrimp Litopenaeus vannamei usually caused by polyphenoloxidase enzyme PPO activities that can decrease consumer demand to these shrimps. Sodium metabisulphite has been used to inhibit the rate of black spot formation in vaname shrimp Litopenaeus vannamei. This substance is effective to minimize blackspot, but it can give negative effect to human health. The purpose of this study was to determine the characterization of mangrove Avicennia marina leaves extracts and its potential in inhibiting blackspot formation on vaname shrimp Litopenaeus vannamei. Concentration of extract as much as 1,5 and 2 respectively were immersed for 15 minutes with 4oC temperature on day 0, day 3, and day 7 of storage. The result showed that 2 mangrove leaves extract has the best effectiveness based on organoleptic test appearance, texture, and sensory , TVB and TPC compared 1,5 mangrove leaves extract and control."

"Timbulnya black spot pada udang vaname Litopenaeus vannamei yang disebabkan oleh aktivitas enzim polifenoloksidase PPO menyebabkan penurunan jumlah konsumen yang mengonsumsi udang tersebut. Sodium metabisulfit selama ini digunakan sebagai penghambat laju black spot pada udang. Zat tersebut bersifat efektif tetapi memiliki efek samping yang merugikan manusia. Tujuan dari penelitian ini adalah mengetahui karakteristik ekstrak daun mangrove Avicennia marina dan potensinya dalam menghambat pembentukan black spot pada udang vaname Litopenaeus vannamei. Ekstrak dibuat dengan konsentrasi 1,5 dan 2 yang diimersi selama 15 menit dengan penyimpanan pada suhu 4oC selama 0, 3 dan 7 hari. Hasil penelitian menunjukkan ekstrak daun mangrove 2 memiliki efektivitas yang terbaik pada pengujian organoleptik kenampakan,tekstur,sensori , TVB dan ALT dibandingkan dengan ekstrak daun mangrove 1,5 dan kontrol.

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Black spot appearance on vamame shrimp Litopenaeus vannamei usually caused by polyphenoloxidase enzyme PPO activities that can decrease consumer demand to these shrimps. Sodium metabisulphite has been used to inhibit the rate of black spot formation in vaname shrimp Litopenaeus vannamei. This substance is effective to minimize blackspot, but it can give negative effect to human health. The purpose of this study was to determine the characterization of mangrove Avicennia marina leaves extracts and its potential in inhibiting blackspot formation on vaname shrimp Litopenaeus vannamei. Concentration of extract as much as 1,5 and 2 respectively were immersed for 15 minutes with 4oC temperature on day 0, day 3, and day 7 of storage. The result showed that 2 mangrove leaves extract has the best effectiveness based on organoleptic test appearance, texture, and sensory , TVB and TPC compared 1,5 mangrove leaves extract and control."