Fitriadi CA, Dhahiyat Y, Purba NP, Harahap SA, Prihadi DJ. 2017. Coral larvae recruitment based on oceanography condition in Biawak Islands, West Java,. This research aimed to know the recruitment pattern of planula in the Biawak Island. The dispersion of planula and corals recruitment as an important factor to determine the distribution of the adult corals. The spawning and brooding are the beginning processes of planula dispersion. Dispersion factors are highly influenced by water environment factors. The main factor in planula dispersion is sea currents, wind, tide, and bathymetry. The circulation of sea currents on Biawak Islands waters is influenced by the tidal movement. The results of research showed that Biawak Islands waters have mixed tide prevailing semidiurnal type of tidal movement. Currents of Biawak Islands waters moved from the northern toward the southern with a range of speed between 0.045-0.075 m/s on northeast and south and for west and north range of speed of sea currents are between 0.015-0.195 m/s, the sea currents movement of Biawak Islands waters was dominated by tidal movement. Biawak Islands have varying wind speed, the most direction of wind moved to northwestern toward southeastern by predominance speed 4.8-7.2 m/s. The results of research showed that planula on the Biawak Island moved to northern and northeastern at high tide and then moved to southern and southeastern at a low ebb with the furthest movement of planula on the Biawak Island was 2.2 km. The furthest movement of planula on the Gosong Island was 1.66 km and planula dispersed to the east and west region of Gosong Island, on the Cendikia Island planula dispersed to northern and eastern with the furthest movement of planula on the Cendikia Island was 0.44 km. Based on the movement of planula can be concluded that source of coral reefs on the Gosong Island derived from the coral reefs on the Biawak Island.
Abstract. Andriani Y, Dhahiyat Y, Zahidah, Zidni I. 2016. The effect of stocking density ratio of fish on water plant productivity in aquaponics culture system. Nusantara Bioscience 8: xxxx. This study aims to determine the productivity of water plants at various stocking density ratios in the aquaponic culture system. This study is conducted experimentally using the Completely Randomized Design with the differences in the treatment of stocking density ratio, each repeated five times. The treatments of the stocking density ratio of both the catfish fry and the Nile tilapia fry include: A (75:75 fry/m 2 ), B (100:50 fry/m 2, and C (125:25 fry/m 2 ). The observed parameters are 1) plant productivity including measuring the growth of water spinach and growth rate, covering weight gain, stem length and number of leaves, and 2) water quality, including dissolved oxygen (DO), nitrate and phosphate. The data of plant productivity is analyzed descriptively while the water quality is analyzed using ANOVA. The result of this study shows that the stocking density ratio significantly affects the productivity of water plants and the water quality of the media. The highest productivity of water spinach productivity occurs at the stocking density ratio of 75 catfish fry/m 2 : 75 Nile tilapia fry m 2 , at which the average stem length is 59.14 cm, average number of leaves is 13.67, and the harvest weight is 465 g. Fish stocking density ratio also affects the quality of water, where the synergy between fish farming and water plant growing results in the better water quality compared to fish farming without water plant. The highest quality of water is achieved at the stocking density ratio of 100 catfish fry/m 2: 50 Nile tilapia fry/m 2 .
Abstract. Hasan Z, Dhahiyat Y, Andriani Y, Zidni I. 2016. Water quality improvement of Nile tilapia and catfish polyculture in aquaponics system. Nusantara . Research on the improvement of polyculture water quality in aquaponics system was conducted from July 2014 to August 2014. This study aims to improve the water quality in Nile tilapia and catfish polyculture by applying the aquaponics system. The results show that several water quality parameters increase, such as dissolved oxygen, ammonia, and nitrate. Meanwhile, Orthophosphate tends to be similar both in aquaponics system and control. The study is conducted experimentally by using completely randomized design. The cultured fish are catfish and Nile tilapia while the aquatic plants are water spinach and lettuce. At the end of the study the concentration of dissolved oxygen in the aquaponics system ranges from 5.3 to 7.6 mg/L, while in the media control ranges from 4.2 to 4.3 mg/L. Average concentrations of ammonia, nitrate and orthophosphate in the aquaponics system range from 0.003 to 0.25 mg/L, 10.0 to 50.7 mg/L and 3.0 mg/L-5.0 mg/L respectively. Meanwhile, in media control, concentration of those three parameters are 0.003 to 0.35 mg/L, 10.0 to 60.0 mg/L and 3.0 to 5.0 mg/L respectively. Based on this study, it is concluded that the polyculture water quality can be improved through the application of the aquaponics system.
This study aims to determine the growth of fish (Nile tilapia, North African catfish, and goldfish) which cultured along with water spinach in aquaponics system. The study was conducted at the Laboratory of Aquaculture, Ciparanje, Facul-ty of Fisheries and Marine Sciences, Padjadjaran University from February to April 2016. The experiment was designed using a completely randomized design with 5 treatments and 3 replicates. Treatment A: positive control, water spinach grown on soil and compost fertilizer, Treatment B: negative control, water spinach grown on soil without compost fertilizer, treatment C: aquaponics Nile tilapia and water spinach, Treatment D: aquaponics North African catfish and water spinach, and treatment E: aquaponics goldfish and water spinach. The measured parameters in this study were fish growth and water spinach growth include stem height, number of leaves, biomass as well as water quality included nitrates, ammonia and phosphates. The results showed that the highest fish growth, obtained in combination of catfish and water spinach with growth of 7.8±1.18 grams and the highest water spinach growth obtain in koi cultured with water spinach with average biomass 30.40±5.59 grams. AbstrakPenelitian ini bertujuan untuk menentukan pertumbuhan tiga jenis ikan (lele, nila, dan koi) yang dipelihara bersama de-ngan kangkung darat dalam sistem akuaponik. Penelitian dilakukan di Laboratorium Budi daya Perikanan, Ciparanje, Fakultas Perikanan dan Ilmu Kelautan Universitas Padjadjaran dari bulan Februari hingga April 2016. Metode yang digunakan dalam penelitian ini adalah metode eksperimental menggunakan rancangan acak lengkap dengan lima perla-kuan dan diulang empat kali. Perlakuan A: kontrol positif, tanaman kangkung darat ditanam menggunakan tanah dan pupuk kompos; perlakuan B: kontrol negatif, tanaman kangkung darat ditanam menggunakan tanah tanpa menggunakan pupuk kompos; perlakuan C: akuaponik dengan ikan nila dan tanaman kangkung darat; perlakuan D: akuaponik dengan ikan lele dan tanaman kangkung darat, dan perlakuan E: ikan koi dan tanaman kangkung darat. Parameter yang diukur dalam penelitian ini adalah pertumbuhan bobot ikan, dan pertumbuhan kangkung yang meliputi tinggi batang, jumlah daun, dan biomassa panen serta kualitas air yang mencakup nitrat, ammonia, dan fosfat. Hasil penelitian menunjukkan bahwa pertumbuhan bobot ikan tertinggi diperoleh pada kombinasi lele dan kangkung darat dengan pertumbuhan sebe-sar 7,8±1,18 g dan pertumbuhan tanaman kangkung tertinggi diperoleh pada pemeliharaan bersama koi yang mengha-silkan biomassa sebesar 30,40±5,59 g.
This research aims to determine the growth of lettuce and water spinach plants used as biofilter in koi fish (Cyprinus carpio) aquaponic system. Research was carried out at the Laboratory of Fisheries, Ciparanje, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran from March to April 2018. Research was carried out experimentally using Randomized Block Design (RBD) with 2 treatments and 6 repetitions. The treatments were a combination of koi and water spinach, and a combination of koi and lettuce. The parameters observed were fish growth, fish survival, increase in length of plant stems and increase in leaf strands. The combination of koi fish and water spinach plants produced the highest productivity of plants, with stem length of 39 cm and the addition of 15 leaflets. This combination also produced the highest absolute growth of 3.93 grams / fish and survival rate of 100%.
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