Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu pengkayaan HUFA (W-3 Highly Unsatured Fatty Acid) pada nauplius artemia terhadap perkembangan larva kepiting bakau (Scylla tranquebarica). Metode Penelitian ini didesain dengan menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan masing-masing 3 kali ulangan sehingga dibutuhkan wadah sebanyak 12 unit dengan perlakuan: A) Nauplius artemia diperkaya dengan HUFA selama 1 jam (Kontrol), B) Nauplius Artemia diperkaya dengan HUFA selama 3 jam, C) Nauplius artemia diperkaya dengan HUFA selama 6 jam D) Nauplius Artemia diperkaya dengan HUFA selama 9 jam. Hasil penelitian menunjukkan bahwa efek perbedaan lama waktu pengkayaan HUFA pada Nauplius artemia terhadap perkembangan larva kepiting bakau (Scylla tranquebarica) tidak berpengaruh nyata (P>0,05). Jumlah larva kepting bakau yang bertahan sangat sedikit pada perlakuan lama waktu pengkayaan HUFA pada nauplius artemia. ABSTRACT The present study aimed to determine the effect of the length of time enrichment of HUFA (W-3 Highly Unsaturated Fatty Acid) in Artemia nauplius on the development of mangrove crab (Scylla tranquebarica) larvae. A completely randomized design with 4 treatments with 3 replications were applied for experimental design, with the following treatments: (A) Nauplius artemia enriched with HUFA for 1 hour; (B) Nauplius Artemia enriched with HUFA for 3 hours; (C) Nauplius artemia was enriched with HUFA for 6 hours. (D) Nauplius Artemia was enriched with HUFA for 9 hours. The results indicated that the effect of differences in the length of time for HUFA enrichment in Nauplius artemia on the development of mud crab (Scylla tranquebarica) larvae showed no significant effect (P>0.05). Only a few mangrove crab larvae survived during treatment of HUFA enrichment time in Artemia nauplius.
The present study aimed to determine different planting distances on the growth of Kappaphycus Alvarez using the longline method. The present study was conducted from September to October 2018 in Mandar Bay, West Sulawesi. Water quality measurement was performed in situ during the study period, including temperature, salinity, pH, turbidity, and water current and data collected on the specific and absolute growth of seaweed. Prior to study, buoys, rope, length measurement device, and anchor were prepared for seaweed cultivation. The long-line method was applied for seaweed cultivation, and the seed of Seaweed Kappaphycus alvarezii obtained from local seaweed farmers. A total of 10 stretches rope using different planting distance of 15 cm (P1), 30 cm (P2), 45 cm (P3), and 60 cm (P4). The cultivation was carried out for 5 weeks. The results showed that the highest specific growth rate and absolute growth were obtained from P3 in which the absolute growth reached 165 gr, and the specific growth rate was 0.14%, respectively. This finding suggested that different planting distance affects the growth of seaweed. In addition, the environmental parameters for seaweed cultivation were still considered in optimum condition for cultivation.
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