Pulau Pasaran dikenal sebagai penghasil ikan teri (Stolephorussp.) di provinsi Lampung dengan jumlah produksi mencapai 57,6 ton setiap bulannya. Hal ini menjadikan Pulau Pasaran sebagai sentra penghasil ikan di provinsi Lampung. Upaya pengolahan yang dilakukan oleh masyarakat menghasilkan berbagai bentuk produk seperti ikan teri kering, teri kemasan vakum dan produk diversifikasi untuk makanan ringan serta pengolahn limbah sebagai bahan baku pakan (feed) untuk ikan nila dan lele. Upaya pengolahan ini disamping dapat meningkatkan nilai tambah (value added) dari ikan teri juga dapat menerapkan konsep zero waste dalam proses pengolahan ikan teri, sehingga pendapatan masyarakat lebih optimal.
Liquid waste produced by tofu and tapioca industry was approximately 1,5-2 m3 and 4-6 m3 per day respectively. Tapioca liquid waste has concentration of carbon around 119,11 mg/l, while tofu liquid waste has around 133,03 mg/l of nitrogen in concentration. Therefore both of these waste have the potential to be used as biofloc that utilized as additional feed with high protein content for nile tilapia. The aim of this research was to know interaction between C/N ratio and place of biofloc production to the growth of nile tilapia. This research used completely randomized design based on factorial experiment which consisted of two level of each factor and three repetition. Level of C/N ratio were 15 and 20 whereas level of place of biofloc production were inside and outside fish culture container. The result of this research showed that interaction between place of biofloc production and C/N ratio affected the growth of nile tilapia. The treatment inside biofloc production with 20 C/N ratio gave provided the highest absolute growth (3,26 g) and daily growth rate (0,082 g per day).
ABSTRAKBunga kenanga (Cananga odorata) mengandung senyawa eugenol yang mempunyai sifat anestesi, sehingga berpotensi sebagai bahan anestesi dalam transportasi ikan. Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu transportasi terhadap survival rate (SR) benih nila merah pada uji simulasi transportasi. Metode penelitian yang digunakan untuk menentukan nilai konsentrasi adalah analisis probit. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL) dengan selang kepercayaan 95%. Hasil analisis probit uji LC50-96 jam nilai yang didapat yaitu 93,97 ppm, dan analisis probit pada uji EC50-1 jam yaitu 61,40 ppm. Uji transportasi menunjukan nilai kelangsungan hidup tertinggi terdapat pada perlakuan 1 jam dengan nilai rata-rata mencapai 91,1%. Hasil penelitian menunjukan bahwa perbedaan waktu berpengaruh nyata terhadap kelangsungan hidup benih nila merah.Kata kunci: Bunga kenanga, anestesi, ikan nila, tansportasi sistem kering
ABSTRACTThe Flower kenanga (Cananga odorata) contains euganolic substances that have trait anesthetic, therefore potentially as anesthesia for fish transportation. This research is intended to identify the effects of the transport duration towards the survival rate of seed red tilapia using a transportation simulation. The scientific method used in this research to determine the level of concentration used probit analysis. The design that was used was the complete random design (RAL) with a confidence interval of 95%. The analysis result of test probit LC50-96 hours was 93,97 ppm, and the analysis result of test probit EC50-1 hour was 61,40 ppm. The transportation test showed that the highest life sustainability was achieved during the 1-hour test with an average value of 91,1%. The results of the experiment showed that difference in duration has a real effect on life sustainability of the seed red tilapia.
Pasaran Island waters is the location of green mussel cultivation (Perna viridis), where the waters has the potential to experience heavy metal pollution including Cadmium (Cd). Green mussels are filter feeders and have a slow movement, thus they have the potential to experience heavy metal bioconcentration on their bodies. The aim of this study was to determine the bioconcentration of heavy metal cadmium (Cd) in green mussels (Perna viridis) which were cultivated in the waters of Pasaran Island. Samples were collected in February 2018 in green mussel cultivating cages of Pasaran Island water with 3 and 6 cm mussel size. Sampling was taken at three stations with three replications each. The Cd content was analyzed using AAS method. The results showed that the water content of Cd at the observation location ranged from 0.022 to 0.024 mg/l. The content of Cd of mussel meat is 0.030 to 0.033 mg/kg, the value is below the threshold based on Indonesian National Standard (SNI). The BFC value of 3 cm mussel is 1.33 mg/kg, while the 6 cm mussel is 1.47 mg/kg which indicates that the green mussels on Pasaran Island are accumulatively low on Cd.
Perairan Pulau Pasaran memiliki sumber daya laut salah satunya adalah kerang darah (Anadara granosa). Limbah yang bersumber dari daratan dan perairan sekitar mengandung logam berat seperti Pb dan Cu yang dapat mempengaruhi organisme. Kerang darah memiliki potensi yang digunakan sebagai bioindikator untuk mewakili logam berat dalam air karena kerang darah memiliki kemampuan untuk mengakumulasi logam berat dalam konsentrasi rendah. Tujuan penelitian ini adalah untuk menganalisis konsentrasi Pb dan Cu pada sedimen dan kerang darah. Metode yang digunakan dalam penelitian ini adalah purposive random sampling untuk menentukan stasiun penelitian dan metode sampling. Konsentrasi logam berat dianalisis menggunakan metode MP-AES. Hasil penelitian menunjukkan bahwa konsentrasi tertinggi pada kerang darah adalah Pb 206,51 mg / kg dan Cu 95,11 mg / kg. Konsentrasi tertinggi pada sedimen adalah Pb 634,49 mg / kg dan Cu 366,85 mg /kg.Kata Kunci: Kerang darah (Anadara granosa); Logam Berat; Pb; Cu; Sedimen
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