Rumput laut adalah salah satu komoditas perikanan yang perlu mendapatkan perhatian khusus terkait kualitas rumput laut untuk mendapatkan agar-agar berkualitas tinggi. Gracilaria verrucosa merupakan jenis rumput laut yang paling utama sebagai sumber penghasil agar (agarofit) yang sebagian besar dimanfaatkan baik dikonsumsi secara langsung maupun untuk kebutuhan industri. Penelitian ini bertujuan untuk mengetahui kualitas rumput laut yang meliputi kandungan rendeman agar, kadar air, kadar abu, serat kasar, Clean Anhydrous Weed (CAW), pengotor, viskositas, gel streght, derajat putih serta kadar sulfat rumput laut yang dibudidaya di tambak Kabupaten Karawang, Jawa Barat, dengan pendekatan analisis diskriptif berdasarkan hasil uji kimia di laboratorium. Penelitian ini dilakukan pada Bulan September 2017, dengan mengambil sample rumput laut dan kualitas air tambak sebanyak 15 stasiun secara acak. Berdasarkan hasil analisis kualitas agar-agar Gracilaria verrucosa di Kabupaten Karawang menunjukkan bahwa secara umum kualitas cukup baik. Kadar sulfat hanya mencapai 4.82% yang artinya bahwa zat pengotor dalam kandungan agar-agar relative rendah, yaitu di bawah 6%. Akan tetapi terdapat beberapa parameter yang kualitasnya cukup tinggi yaitu viskositas dan gel strenght. Viskositas agar mencapai 201.6 cps dan kekuatan gel strenght 356.76 g/cm2.
Abstract. Dharmayanti N, Anti A, Siregar RR, Sipahutar Y, Permadi A, Siregar AN, Salampessy RB, Sujuliyanti, Nurbani SZ, Purnamasari HB. 2021. Title. Biodiversitas 22: 373-378. Brown seaweeds have the potential to produce bioactive compounds. Bacteria associated with seaweeds are involved in the production of metabolites. Microbes may be present as a living symbiotic in association with other algae as epiphytes or endophytes. In this study, bacteria isolated from brown seaweed (Turbinaria conoides) were tested for antibacterial activity. A total of 14 bacteria were isolated, of which 6 were isolated from external tissue, while 8 from internal tissue. Results of an antagonistic test revealed that 7 isolates showed inhibitory activity against Staphylococcus aureus and only 1 isolate showed the inhibition against both S. aureus and Escherichia coli. Phenotypic and genotypic analysis showed that the symbiont bacteria was Lactobacillus plantarum.
PT. X-North Jakarta produces Frozen Loin Tuna. The problem faced is the low value of yields that do not meet the company's standards. The purpose of the study is to (i) know the flow of the process of processing frozen loin tuna. (ii) understanding the quality of frozen loin tuna (iii) implementing kaizen using the fishbone method or a fish bone diagram (iv) understanding corrective actions for increasing yield and productivity (v) intervening in increasing yield and productivity (vi) calculating the estimated profit after interventionThe research was conducted from March to June 2021 at PT. X-North Jakarta. The method used is observation, with the type of data taken being primary and secondary data. Analysis of the Kaizen method obtained results showing that low yields were caused by several factors ranging from humans, methods, raw materials, and machines. After conducting an observation analysis of the yield value, it was found that the standard yield can be increased by 3% in tuna at a size of 20–50 kg, namely from the yield value of 49% can be increased to 52% and the size of 10–20 kg, the yield value of 48% can be increased to 51%. Profits can increase by Rp. 96,000/40 kg of raw materials with a 3% increase in size from 20 kg to 40 kg, and profits can increase by as much as Rp. 2,790,000,000/620,000 kg of raw materials if calculated over a time cycle (years). Improvements will occur if there is supervision and discipline of employees, equipment maintenance, and a need to carefully choose raw material.
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