Abatement of water nutrient load in a fish culture system using the aquatic trophic levels

2021 ◽  
Author(s):  
Hadi Poorbagher ◽  
Gholamreza Rafiee ◽  
Kamran Rezaei Tavabe ◽  
Fateh Moezzi
Keyword(s):  
Culture System ◽  
Trophic Levels ◽  
Fish Culture ◽  
Nutrient Load

scholarly journals Use of Hydroponics to Maintain Quality of Recirculated Water in a Fish Culture System

1978 ◽  
Vol 107 (1) ◽  
pp. 92-99 ◽  
Author(s):  
William M. Lewis ◽  
John H. Yopp ◽  
Harold L. Schramm ◽  
Alan M. Brandenburg
Keyword(s):  
Culture System ◽  
Fish Culture

scholarly journals Effect of Rearing Density of ”Dumbo” Catfish (Clarias sp.) Fry on Production in the Controlled Nitrogen Culture System by Adding Wheat Powder

2007 ◽  
Vol 5 (2) ◽  
pp. 137 ◽  
Author(s):  
D. Shafruddin ◽  
. Yuniarti ◽  
Mia Setiawati
Keyword(s):  
Survival Rate ◽  
Feed Efficiency ◽  
Culture System ◽  
Culture Media ◽  
Inorganic Nitrogen ◽  
Fish Culture ◽  
High Level Waste ◽  
Market Demand ◽  
Average Growth ◽  
Rearing Density

<p>Demand of "dumbo" catfish is going to increase every year so that fry production should be increased in order  to support intensification culture system to meet market demand. Intensification in fish culture system may cause decreasing of dissolved oxygen content  and producing high level waste in the pond culture.  The effort to control inorganic nitrogen in intensive culture system can be performed by adding wheat powder into fish culture media.  This can support metabolic process of nitrogen by microbe and then produce protein in terms of bacteria biomass production, so that inorganic nitrogen in the water decreases.  Fish can utilize protein from  microbe efficiently. This study was conducted to examine effect of rearing density on "dumbo" catfish fry production in the culture system by controlling nitrogen content in water through addition of  wheat powder.  "Dumbo" catfish fry of 12-day old in average body weight of 0.046±0.006 gram and length of 1.7±0.9 cm were reared for 28 days in density of 400, 800 and 1200 fish/m<sup>2</sup>.  The results of study showed that weight and body length of fry reached 1.35 gram and 5.1 cm, respectively. Average of daily growth and production were 10.47 - 11.48% and 2.49 - 3.54 g per day, respectively. Increased of rearing density was insignificantly (<em>p</em>>0.05) affected growth rate and daily production.  Average growth in absolute length, survival rate and feed efficiency was about 2.7-3.2 cm, 36.20 - 53.88% and 147 - 172%, respectively.  Increased in rearing density was followed by decreased growth in length (<em>p</em><0.05), survival rate and feed efficiency.</p> <p>Keywords: "dumbo" catfish, <em>Clarias</em>, nitrogen, wheat, rearing density</p> <p> </p> <p>ABSTRAK</p> <p>Permintaan ikan lele dumbo terus meningkat setiap tahunnya sehingga diperlukan peningkatan produksi benih untuk mendukung intensifikasi usaha budidaya dalam rangka memenuhi permintaan pasar. Budidaya ikan secara intensif dapat menyebabkan menurunnya kadar oksigen air, sedangkan limbah yang dihasilkan tinggi. Upaya untuk mengendalikan nitrogen anorganik pada budidaya intensif dapat dilakukan melalui pemberian tepung terigu ke dalam media budidaya. Hal ini akan mendukung proses metabolisme nitrogen oleh mikroba dan akan menghasilkan protein dalam bentuk bakteri sehingga nitrogen anorganik dalam air menjadi berkurang. Protein mikroba yang dihasilkan dapat dimanfaatkan sebagai sumber protein yang efisien bagi ikan. Penelitian ini bertujuan untuk mengetahui pengaruh tingkat kepadatan terhadap produksi benih ikan lele dumbo pada sistem budidaya  dengan pengendalian nitrogen melalui penambahan tepung terigu. Benih ikan lele dumbo (<em>Clarias sp</em>.) umur 12 hari dengan bobot rata-rata 0,046±0,006 gram dan panjang 1,7±0.9 cm dipelihara selama 28 hari dengan kepadatan 400 ekor/m<sup>2</sup>, 800 ekor/m<sup>2</sup>, 1200 ekor/m<sup>2</sup>.  Hasil penelitian menunjukkan bahwa  benih ikan mengalami peningkatan ukuran berat (1,35 gram) dan panjang (5,1 cm). Nilai rata-rata pertumbuhan dan produksi harian masing-masing berkisar 10,47 - 11,48% dan 2,49 - 3,54 gr/hari. Peningkatan kepadatan tidak berpengaruh nyata (p>0,05) terhadap laju pertumbuhan dan produksi harian. Nilai rata-rata pertumbuhan panjang mutlak, kelangsungan hidup dan efisiensi pakan masing-masing berkisar 2,7-3,2 cm, 36,20 - 53,88% dan 147 - 172%. Peningkatan kepadatan diikuti dengan penurunan pertumbuhan panjang (p<0,05), kelangsungan hidup dan efisiensi pakan.</p> <p>Kata kunci: lele dumbo, <em>Clarias</em>, nitrogen, terigu, padat penebaran</p>

scholarly journals PRODUKSI IKAN UNGGUL DI LAHAN MINAPADI SECARA INTENSIF

2017 ◽  
Vol 4 (1) ◽  
pp. 26
Author(s):  
Wahyulia Cahyanti ◽  
Vitas Atmadi Prakoso ◽  
Otong Zenal Arifin ◽  
Irin Iriana Kusmini
Keyword(s):  
Culture System ◽  
Added Value ◽  
Fish Culture ◽  
Fish Production ◽  
Land Productivity ◽  
Fisheries Resources ◽  
Push Forward ◽  
Aquaculture Products ◽  
Aquaculture Development

Superior Fish Production in Intensive Paddy Cum Fish Culture         Aquaculture development in Indonesia is expected to push forward the fish farmers entrepreneurship and competitiveness of aquaculture products in a sustainable manner through improved efficiency and cooperative advantages. Development of fisheries resources in accordance with the management and the optimal use or to provide added value of the fish itself also to provide other products. One technology that can be used is through technology in paddy cum fish culture. This study aimed to improve of land productivity through superior tilapia production in paddy cum fish culture system. In general, the best results obtained in treatment A (no treatment). Productivity of rice and fish could be enhanced by applying paddy cum fish culture  system by 4 to 5.5 million or 10-15% per hectare rice field.Keywords: Minapadi, Productivity, Nila, Fertilizer ABSTRAK          Pengembangan perikanan budidaya di Indonesia ke depan diharapkan dapat  mendorong masyarakat perikanan/pembudidaya untuk meningkatkan jiwa kewirausahaan dan daya saing produk perikanan budidaya secara berkelanjutan melalui peningkatan efisiensi dan keunggulan koperatif. Pengembangan sumber daya perikanan yang sesuai dengan pengelolaan dan pemanfaatan yang optimal dan dapat memberikan nilai tambah selain dari ikannya itu sendiri juga produk lainnya. Salah satu teknologi yang dapat digunakan yaitu melalui teknologi minapadi. Penelitian ini bertujuan untukmeningkatkan produktivitas lahan melalui produksi ikan nila unggul dalam sistem minapadi. secara umum, hasil terbaik diperoleh pada perlakuan A (tanpa perlakuan). Dari hasil penelitian, didapatkan kesimpulan bahwa Ikan nila lebih baik pertumbuhannya dibanding mas.Secara umum hasil terbaik diperoleh dari lahan kontrol atau tanpa perlakuan. Produktivitas padi dan ikan dapat ditingkatkan dengan menerapkan sistem minapadi senilai 4-5,5 juta atau 10-15% tiap hektar sawah.Kata kunci : minapadi, produktifitas, Nila, pupuk

scholarly journals The Effect of Salinity and Nutrient Load on the Ecosystems of Selected Lakes in the South of Siberia

2021 ◽  
pp. 154-167
Author(s):  
Egor S. Zadereev
Keyword(s):  
Food Web ◽  
Trophic Levels ◽  
Trophic Chain ◽  
General Description ◽  
Nutrient Load ◽  
Key Factors ◽  
Lake Ecosystems ◽  
Food Web Interactions ◽  
South Of Siberia ◽  
Diverse Community

Salinity largely determines the species diversity and structure of the food web in lake ecosystems. Many studies have been focused on the salinity tolerance of various plankton species. There are fewer studies investigating the modifications in the food web interactions under the effect of salinity. An appropriate system for such studies is closely located lakes of different salinity. We took samples during the summer stratification and analyzed the physicochemical and biological characteristics of 20 lakes (salinity 0.1-35 g/l) in southern Siberia in order to provide general description of this system and to test a number of hypotheses about the effect of salinity on the structure of the food web. The analysis revealed two key factors structuring ecosystems of the studied lakes. The species composition of zooplankton was determined by salinity, with a decrease in the number of species and the transformation of the community from a diverse community of zooplankton (salinity up to 3 g/l) to the dominance of large daphnia (3-8 g/l), copepods (> 8 g/l), small cladocerans and rotifers (20-30 g/l), and Artemia (> 30 g/l). The top predator (fish) was eliminated at salinity above 10 g/l. The biomass of zooplankton did not depend on salinity, but significantly increased in lakes with an increased nutrient load. The nutrient load also had a significant effect on the concentration of total phosphorus, turbidity and transparency of water, and the concentration of chlorophyll “a”. Thus, we recorded the structuring effect of the nutrient load (bottom-up control) on the biomass of the trophic levels and the parameters of water transparency, while salinity transformed the trophic chain from the top, leading to the disappearance of fish and a change in the dominant species of zooplankton. At the same time, salinity did not affect the biomass of the trophic levels. In order to detect top-down effects in the ecosystems of saline lakes, it is necessary to perform a comparative analysis of the seasonal dynamics of ecosystems of lakes with different salinity

scholarly journals Short Communication: Evaluation of water quality and survival rate of red tilapia (Oreochromis niloticus) by using rice-fish culture system in quarry land of clay

2019 ◽  
Vol 20 (2) ◽  
pp. 589-594
Author(s):  
DEWI HIDAYATI ◽  
SUPIANA DIAN NURTJAHYANI ◽  
DWI OKTAFITRIA ◽  
NOVA MAULIDINA ASHURI ◽  
WAHYU KURNIALLAH
Keyword(s):  
Water Quality ◽  
Survival Rate ◽  
Oreochromis Niloticus ◽  
Culture System ◽  
Short Communication ◽  
Fish Culture ◽  
Cultivation Medium ◽  
Red Tilapia ◽  
Communication Evaluation ◽  
Rice Fish

 Abstract. Hidayati D, Nurtjahyani SD, Oktafitria D, Ashuri NM, Kurniallah W. 2019. Short Communication: Evaluation of water quality and survival rate of red tilapia (Oreochromis niloticus) by using rice-fish culture system in quarry land of clay. Biodiversitas 20: 589-594. Quarry land is an area that has been used as mining land and has different characteristics from the former conditions before being mined so that the level of productivity of the soil decreases. This study aims to determine the suitability of clay quarry land in Tuban as a cultivation medium based on the analysis of the water quality and survival rate of red tilapia (Oreochromis niloticus) using rice-fish culture system. This study used a completely randomized experimental design method with triplicate of three ratio of cultivation medium using Ex-mining Land Soil (EmLS) from quarry land and Top Soil, i.e., 1:0 (A), 1:1 (B), and 0:1 (C/Control). Results of water quality measurements that include nitrite, nitrate, temperature, pH, and dissolved oxygen in descriptive unreal influence showed good condition. However, ammonia gives a significantly different effect mainly on the survival rate in 30 days nurture. In the end, the ANOVA test result of tilapia survival in treatment A was not significantly different (P>0.05) with treatment B and control. Based on these data, it can be seen that the EmLS from the quarry land of clay and TS can be used as a medium for cultivation of red tilapia (O. niloticus) with the recommended ratio of 1:1.

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