PENGARUH KUALITAS AIR TERHADAP PERTUMBUHAN IKAN NILA NIRWANA (Oreochromis sp.) PADA TAMBAK PAYAU

Kampung Holtekamp is a coastal area which is included in the administrative area subjected to coastal tourism and community-based aquaculture, including tilapia fish farming. Problems faced by fish farmers in Holtekamp is The water quality and the need for a source of water for pond management. The research was conducted in Holtekamp, Muara Tami District, Jayapura city. Direct observation and experiment method were applied in this research. The water of the pond has a pH range between 6.7 to 8.2. dissolved oxygen (DO) ranged between 6.9 mg/L to 13.9 mg/L. The value of total ammonia (NH3) for a month experienced an increase ranging from 1.14 mg/L to 1.73 mg/L. Then the brightness in the pond during the month ranged between  7 to 17.5 cm. While the temperature in the ponds ranged between 20.7°C to 35.2°C. Salinity had the value of 0 ‰ to 0.4 ‰. The results based on the length, the weight of fish and the water quality in tilapia fish farming nirvana pond indicated that the growth of fish seeds and some water quality parameters such as DO, ammonia, brightness, and the temperature in the ponds were classified as less good  Keywords: quality of water, brackish pond, Nila Nirwan

Penghidupan Berkelanjutan Masyarakat Pesisir Di Kampung Tobati dan Kayo Pulau Kota Jayapura

Abstrak  Di pesisir Kota Jayapura trend  kemiskinan terkait dengan berbagai sebab terutama kerusakan lingkungan atau degradasi sumberdaya alam. Kemiskinan dan kerusakan sumberdaya saling memperparah dan mengancam keberlanjutan proses pembangunan. Penelitian ini bertujuan untuk: (1) Mengkaji kondisi eksisting aset penghidupan yang dimiliki masyarakat, (2) Mengkaji status aset penghidupan dan (3) Menentukan Strategi penghidupan berkelanjutan masyarakat yang tinggal di wilayah pesisir Kota Jayapura. Ada dua unit analisis dalam penelitian ini : (1) Tingkat Makro miskin - kampung pantai/pesisir, dan (2) tingkat Mikro adalah rumah tangga miskin pesisir. Data primer dikumpulkan dengan kuesioner, observasi, wawancara mendalam dan focus group discussion (FGD). Analisis kondisi eksisting sumberberdaya penghidupan dengan pendekatan studi literature dan dilaksanakan melalui kegiatan mengumpulkan kriteria dan indikator aset penghidupan di kampung Kayo pulau dan Tobati berdasarkan studi literatur. Analisis dilakukan secara kualitatif, skala likert tiga strata yang diperoleh dari data sekunder dan setiap item jawaban responden dilakukan untuk mengetahui status aset penghidupan. Tingkat penghidupan masyarakat di kampung kayo pulau tergolong tidak berkelanjutan. Sedangkan Tingkat penghidupan masyarakat di kampung Tobati tergolong belum berkelanjutan.   Kata Kunci: aset,penghidupan/livelihood, degradas

PENGARUH PEMBERIAN PAKAN YANG BERBEDA TERHADAP PERTUMBUHAN BENIH IKAN LELE SANGKURIANG (Clarias gariepinus var) DI DALAM WADAH TERKONTROL

Quality feed with the right nutrient content can accelerate the process of fish growth so that the need for a very large feed operating costs between 60-70% can be anticipated. This study aims to determine the effect of commercial, natural and artificial feed on the absolute growth of weight and survival rate of Sangkuriang catfish (Clarias gariepinus var). The study was conducted for 49 days with 20 catfish seedlings in 12 containers of 40 x 20 cm jars with 4 liters of water volume capacity. Experimental design with 4 treatments and 3 repetitions times Hi-Pro-Vite 788 feed, silkworm (Tubifex sp.), tempe and tofu dregs. Measurement of seed weight every seven days and also measured water quality parameters. The results showed that the average growth of absolute seed weight of sangkuriang catfish with feeding of silkworm has the highest value of 4.54 grams and the lowest tempe feed is 3.84 grams. While the highest survival rate (SR) of catfish seed in silkworm feed was 93.3% and tempe feed was 75%. The results of the analysis of variance (ANOVA) of the feed treatment of Hi-Pro-Vite 788, the silkworm, tempe and tofu dregs significantly influence the growth of absolute weight and survival rate (SR) of Sangkuriang catfish seeds.  Keywords: fish feed, sangkuriang catfish seed, absolute growth weight, survival rat