Akuaponik adalah gabungan budidaya ikan dan tanaman hidroponik dengan sistem resirkulasi. Akuaponik merupakan salah satu alternatif yang dapat memanfaatkan limbah budidaya ikan serta mampu menghemat penggunaan lahan dan air. Tujuan dari kegiatan ini adalah memberikan informasi kepada para pembudidaya mengenai pemeliharaan ikan nila dan tanaman kangkung dengan sistem akuaponik. Kegiatan ini dilaksanakan pada bulan September sampai November 2018. Pemeliharaan ikan nila dengan sistem akuaponik dilakukan selama 37 hari, dikolam beton ukuran 3x1,5x1 m3, dengan jumlah ikan yang ditebar 200 ekor. Hasil pemeliharaaan didapatkan pertumbuhan ikan nila sebesar 3,31±0,68 cm dan 21,59±4,28 g. Laju pertumbuhan spesifik ikan nila sebesar 2,07%.hari-1 dengan kelangsungan hidup sebesar 95%. Tanaman kangkung mengalami pertumbuhan sebesar 47,86±2,81 cm dan 16,85±2,74 g.
Masculinization is a method of sex reversal technique that can direct sexuality from female to male. The purpose of this study was to determine the effects of coconut water on masculinization in guppy by immersion administration. The study used a completely randomized design (CRD) with three treatments and three replications. After 12 days post spawning, female guppies were immersed for 8 hours.The concentrations were : 0%(P0), 20% (P1), and 40% (P2). The parameters were observed including percentage of male, survival rate and water quality (thermal, pH and kalium concentration). Baby guppies were reared until sex can be determined which were 42 days of culture. The result showed that the percentage of male guppy fish was 54.44% (P0), 77.78% (P1) and 90.00% (P2). The survival rate of larval during maintenance was 100% for all treatments. Water quality during maintenance was 27.0-28.4 0 C for temperature and 6.38-7.20 for pH. To sum up, this experiment proved that coconut water can be used for masculinization by immersed pregnant female broadstock and it produced 90% male when immersed with 40% of coconut water.
The purpose of this study was to determine the best fertilizer compotition that was made from technical fertilizer and waste water of cat fish farming. This experimental was conducted at Aquaculture Laboratory, Faculty of Agriculture, Sriwijaya University. It used complete randomized design (CRD) method which had five treatments and three replications, the waste water from catfish pond (P0), waste water from catfish pond + 25% technical fertilizer (P1), waste water from catfish pond + 50% technical fertilizers (P2), the waste water from catfish pond + 75% technical fertilizers (P3), the waste water from catfish pond + 100% technical fertilizers (P4). The results showed that the best maximum density of S. platensis was P3 about 3.98 g l -1 , and growth rate was equal to 2.80% day -1 . The most significant parameter of water quality was ammonia which decreased until 82.78%. Besides, it was more beneficial than others based on Return Cost Ratio (R/C ratio) and Benefit Cost Ratio (B/C ratio) which were 3.66 and 2.66 respectively. Keywords: Spirulina platensis, waste water pond of catfish, modified media PENDAHULUAN Menurut Gunadi dan Hafsaridewi (2008), sumber pencemaran yang perlu mendapat perhatian salah satunya adalah limbah budidaya ikan yang dibuang langsung ke perairan. Hal ini senada dengan Cao et al., (2007) yang menyatakan bahwa pengolahan limbah yang tidak sempurna dalam perikanan budidaya berkontribusi banyak terhadap kerusakan lingkungan. Menurut Amalia (2014), kandungan limbah budidaya ikan lele sebagian besar terdiri dari amonia sebesar 6,12 mg kolam -1 yang diantaranya mengandung unsur nitrogen. Kandungan nitrogen dalam limbah disebabkan oleh pakan yang tidak dikonsumsi maupun hasil metabolisme ikan itu sendiri. Sebesar 75% kadar nitrogen dalam pakan berpotensi sebagai pemasok amonia ke dalam media air budidaya ikan (Gunadi dan Hafsaridewi, 2008). Beberapa upaya yang telah dilakukan untuk mengatasi permasalahan air limbah kolam ikan lele yaitu dengan memanfaatkanJurnal Akuakultur Rawa Indonesia, 6(2) : 153 -164 (2018)
Ascorbic acid was one of the important nutrients for fish because it has the property as an antioxidant and imunomodulator that can improve the performance of fish. The purpose of this research is to support the production of snakehead fish (Channa striata) that have good growth and immunity. This research used a complete randomized design (CRD) consisted of 3 treatments and 3 replications. Ascorbic acid treatment consisted of P1 (0 mg.kg-1), P2 (50 mg.kg-1) and P3 (100 mg.kg-1). The results showed that the maintenance of snakehead fish (Channa striata) given ascorbic acid with a doses of 100 mg.kg-1 for 30 days gave the best growth results and significantly different and absolute weight growth reached 1.83 g, absolute length of 18.7 mm and survival reached 95 , 83 %. For immunity performance, it can be seen from survival of fish exposed to salinity 20 ppt during 15 minute reach 73,3 % and formalin 10 % for 10 minute reach 66,7 % and disease prevalence percentage reach 16,7 %
The purpose of this research is to explore effectiveness from every part of Phyllanthus niruri such as leaves (L), fruits (F), stem (S) and combination (C) of those parts that able to inhibit Aeromonas salmonicida growth by using different methods of extraction both infundation and maceration. Experiments has been done at Budidaya Perairan Laboratory, Sriwijaya University. In vitro analysis used tetracycline 30 µg/ml as positive control, bacterial culture at 10 14 CFU/ml and concentration of each part of stone breaker was 20%, 40%, 60%, 80% and 100%. The result revealed that stone breaker extract produced by infundation and maceration methods exhibited inhibitory activity against A.salmonicida. Moreover, only maceration method had bactericidal effect, in fact fruits (F) and combination (C) was the best part of P. niruri which had higher inhibition zone than control (antibiotics). It was 16,9 mm and 17,3 mm respectively. However, the extracts are recommended to cure aeromonad infection due to bacterial resistance of tetracycline already increase. Thus, some extraction methods are needed to be developed for further research with minimum inhibition zone is 20 mm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.