scholarly journals Assessment of fluoride bioaccumulation potential in African Catfish (Clarias gariepinus) reared in fluoride rich water

1970 ◽  
Vol 47 (2) ◽  
pp. 472-484
Author(s):  
Jophillene Bejumula ◽  
Revocatus L Machunda ◽  
Liliane J Pasape ◽  
Kelvin M Mtei
Keyword(s):  
Exposure Time ◽  
Clarias Gariepinus ◽  
Dry Weight ◽  
Pond Water ◽  
Trophic Levels ◽  
African Catfish ◽  
Growth And Survival ◽  
Nelson Mandela ◽  
High Fluoride ◽  
Fish Survival

Fluoride bioaccumulation in fish poses a significant impact on their growth, survival and consequently to upper trophic levels. Few studies have reported the impacts of high fluoride concentrations and their accumulation potential to catfish in African settings. A 60-day catfish cultivation was conducted at Ngarenanyuki ward and the Nelson Mandela African Institution of Science and Technology (NM-AIST) in Arusha, Tanzania to determine fluoride bioaccumulation and its impacts to catfish growth and survival. Juvenile catfish were exposed to 36 mg F–/L pond water and synthetic water containing fluoride (NaF) concentrations of 5, 15, 36 and 45 mg/L in aquaria set at NM-AIST laboratory. Fluoride concentrations in fish tissues were analysed by ion-selective electrode. Fish survival rate was greater than 90% in ≤ 36 mg/L fluoride levels compared to 65.8% in 45 mg F–/L aquarium. Significant fluoride bioaccumulation was observed in fish bones (222.00 mg/kg, dry weight), gills (177.4 mg/kg), skin (9 mg/kg) and low amount in fillets (1.467 mg/kg). Fluoride bioaccumulation significantly rose with fluoride levels increase and exposure time (p = 0.000). The study concludes that high fluoride occurrence and its increased exposure time increases fluoride bioaccumulation in African catfish. Therefore, growing catfish in water containing ≥ 45 mg F–/L requires defluoridation process. Keywords: African catfish, Aquarium, Fluoride bioaccumulation, Growth performance

scholarly journals Growth of Basil (Ocimum basilicum) in DRF, Raft, and Grow Pipes with Effluents of African Catfish (Clarias gariepinus) in Decoupled Aquaponics

2021 ◽  
Vol 3 (1) ◽  
pp. 92-109
Author(s):  
Johannes Pasch ◽  
Benny Ratajczak ◽  
Samuel Appelbaum ◽  
Harry W. Palm ◽  
Ulrich Knaus
Keyword(s):  
Growth Parameters ◽  
Clarias Gariepinus ◽  
Dry Weight ◽  
High Water ◽  
Ocimum Basilicum ◽  
Root Activity ◽  
Leaf Biomass ◽  
African Catfish ◽  
Nutrient Loads ◽  
Intensive Rearing

Basil (Ocimum basilicum) was cultivated in Rostock, Northern Germany, in a decoupled aquaponic system with African catfish (Clarias gariepinus) under intensive rearing conditions by using three hydroponic components, the dynamic root floating technique (DRF), the raft technique, and grow pipes. A 25% of the recommended feed input still allowed African catfish growth and provided adequate nitrogen and calcium levels in the process water. After 36 days, the plants were examined with respect to 16 different growth parameters. DRF performed significantly better than raft and/or grow pipes in 11 parameters. Total weight of basil was significantly higher in DRF (107.70 ± 34.03 g) compared with raft (82.02 ± 22.74 g) and grow pipes (77.86 ± 23.93 g). The economically important leaf biomass was significantly higher in wet and dry weight under DRF cultivation (45.36 ± 13.53 g; 4.96 ± 1.57 g) compared with raft (34.94 ± 9.44 g; 3.74 ± 1.04 g) and grow pipes (32.74 ± 9.84 g; 3.75 ± 1.22 g). Two main factors limited plant growth: an unbalanced nutrient concentration ratio and high water temperatures with an average of 28 °C (max 34.4 °C), which resulted in reduced root activity in raft and grow pipes. DRF was able to maintain root activity through the 5 cm air space between the shoots and the nutrient solution and thus produced significantly more biomass. This suggests DRF to be used for basil aquaponics under glass house conditions with high-temperature scenarios. Future studies are needed to optimize nutrient loads and examine systems with the plant roots exposed to air (Aeroponics).

scholarly journals Pengaruh Pemberian Pakan Alami dan Buatan terhadap Pertumbuhan dan Kelangsungan Hidup Benih Ikan Lele Dumbo (Clarias gariepinus Burchell.) di Balai Benih Sentral Noekele Kabupaten Kupang

2019 ◽  
Vol 4 (2) ◽  
pp. 59-68
Author(s):  
Apriani P Rihi
Keyword(s):  
Clarias Gariepinus ◽  
Subsequent Treatment ◽  
Natural Food ◽  
African Catfish ◽  
Fish Food ◽  
Growth And Survival ◽  
Artificial Food ◽  
Randomized Design ◽  
Analysis Technique ◽  
Completely Randomized Design

Research on the effect of natural and artificial feed on the growth and survival of African catfish at the Noekele Central Seed Center in Kupang Regency, East Nusa Tenggara Province. The center only uses artificial food as fish food while natural food has never been used, therefore researchers are motivated to use natural food then researchers want to see how the influence of natural food is. The purpose of this study is to determine the effect of natural and artificial feeding on the growth and survival of African catfish (Clarias gariepinus Burchell) at the Noekele Central Seed Center in Kupang Regency, knowing the implementation of research results on the learning process of biology at school. The method used in this study is an experimental study using an experimental design that is Completely Randomized Design (CRD) with 3 treatments, each treatment was repeated 3 times namely P0 (Control), P1 (Pellets), and P2 (Silkworms). The data analysis technique used in this study was that this study was analyzed using analysis of variance (Anova) in accordance with the Completely Randomized Design (CRD). The average subsequent treatment was tested using the Duncan Multiple Range Test (DMRT) with a significant level of 5%. The results showed that the treatment of artificial feed (pellets) and natural feed (silk worms) showed significant differences between the treatments for growth and survival of Dumbo catfish (Clarias gariepinus Burchell.). The highest absolute length growth results were found in the P2 treatment of natural silk worm feed of 3.10 cm and the absolute weight of 2.68 grams of survival of African catfish (Clarias gariepinus Burchell.) Highest seeds in natural and artificial food which was 100%.

scholarly journals Evaluation of health status and meat quality of dumbo catfish Clarias gariepinus maintained using the biofloc system

2020 ◽  
Vol 19 (2) ◽  
pp. 190-198
Author(s):  
Anang Fajrin ◽  
Nurbambang Priyo Utomo ◽  
Julie Ekasari ◽  
Sri Nuryati
Keyword(s):  
Health Status ◽  
Growth Performance ◽  
Meat Quality ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
African Catfish ◽  
Fish Stocking ◽  
Commercial Feed ◽  
Fish Survival

This research aimed to evaluate the health status, growth performance, and meat quality of African catfish Clariasgariepinus maintained in biofloc and nonbiofloc systems. This study applied 3 treatments with 4 replications, i.e.K500 (control, a non-biofloc system at a fish stocking density of 500/m3), BF500 (biofloc system at a fish stockingdensity of 500/m3), and BF700 (biofloc system at a fish stocking density of 700 /m3). The initial body length andbodyweight of the fish used in this experiment were 10–12 cm and 10–12g, respectively. Feeding was done byusing a commercial feed containing 29.76% protein content. The results showed that fish survival in treatmentsBF500 and BF700 were significantly different (P<0.05) from the control. The growth rate of African catfish in thecontrol (K) was the lowest (3.64 ± 0.56%) among the treatments. The results of the organosensory test showed thatthe application of biofloc systems produced a higher quality of fish meat with a range value of 7–9 compared to thatof the control with a range of 6–7. In conclusion, the application of biofloc systems could improve the fish healthstatus, growth performance, and meat quality of African catfish. Keywords: biofloc systems, Clarias gariepinus, density, health status, meat quality ABSTRAK Penelitian ini bertujuan mengevaluasi status kesehatan, kinerja pertumbuhan, dan kualitas daging ikan lele AfrikaClarias gariepinus yang dipelihara menggunakan sistem bioflok dan nonbioflok. Penelitian ini menggunakan 3perlakuan dengan 4 kali ulangan, yang terdiri dari: K500 (kontrol, sistem nonbioflok dengan kepadatan ikan 500ekor/m3), perlakuan BF500 (sistem bioflok dengan kepadatan ikan 500 ekor/m3), dan perlakuan BF700 (sistembioflok dengan kepadatan ikan 700 ekor/m3). Ikan yang digunakan berukuran panjang dan bobot awal masingmasing10–12 cm dan 10–12 g. Pemberian pakan dilakukan dengan menggunakan pakan komersil dengan 29,76%protein. Hasil penelitian menunjukan tingkat kelangsungan hidup antara perlakuan BF500 dan BF700 berbeda nyata(P<0.05) dengan perlakuan K500. Laju pertumbuhan ikan lele pada perlakuan K500 lebih rendah dibandingkanperlakuan lain. Hasil pengujian organosensory menunjukkan bahwa ikan yang dipelihara dalam sistem bioflokmenghasilkan kualitas daging yang lebih tinggi dengan kisaran nilai 7–9 dibandingkan dengan ikan K500 dengannilai 6–7. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa aplikasi sistem bioflok dapat meningkatkanstatus kesehatan, laju pertumbuhan, dan kualitas daging ikan lele Afrika. Kata kunci: bioflok, Clarias gariepinus, kepadatan, kualitas daging, status kesehatan

scholarly journals A Mini-Review: Importance of Proper Nutrition for the Growth of Cultured African Catfish (Clarias gariepinus)

2021 ◽  
pp. 1-9
Author(s):  
Gifarri Azanna Yudawan ◽  
. Junianto
Keyword(s):  
Freshwater Fish ◽  
Clarias Gariepinus ◽  
Fish Farming ◽  
Feeding Practices ◽  
African Catfish ◽  
High Quality ◽  
Growth And Survival

Feeding is an important aspect of fish farming activities and could determine the quality of fish. African catfish (Clarias gariepinus) is an omnivorous freshwater fish that is high in protein and economical value. Catfish nursery generally uses natural feed and artificial feed to ensure the diet requirements fullfiled. Good feeding, in quality or quantity, is an important aspect to produce a high quality breed. A good feed is the basis of improving cultured catfish growth and survival performance. The purpose of this article is to review types of feed, feeding practices, and their enriched alternatives for catfish rearing.

scholarly journals Growth of Basil (Ocimum basilicum) in Aeroponics, DRF, and Raft Systems with Effluents of African Catfish (Clarias gariepinus) in Decoupled Aquaponics (s.s.)

2021 ◽  
Vol 3 (3) ◽  
pp. 559-574
Author(s):  
Johannes Pasch ◽  
Samuel Appelbaum ◽  
Harry Wilhelm Palm ◽  
Ulrich Knaus
Keyword(s):  
Large Scale ◽  
Growth Parameters ◽  
Clarias Gariepinus ◽  
Dry Weight ◽  
Ocimum Basilicum ◽  
African Catfish ◽  
Floating Raft ◽  
Tropical Conditions ◽  
Intensive Rearing ◽  
System Improvement

Basil (Ocimum basilicum) was cultivated in three hydroponic subsystems (i) a modified commercial aeroponics, (ii) a dynamic root floating (DRF) system, and (iii) a floating raft system in a decoupled aquaponic system in Northern Germany, Mecklenburg–Western Pomerania. For plant nutrition, aquaculture process water from intensive rearing of African catfish (Clarias gariepinus) was used without fertilizer. After 39 days, 16 plant growth parameters were compared, with aeroponics performing significantly better in 11 parameters compared with the DRF, and better compared with the raft in 13 parameters. The economically important leaf wet and dry weight was over 40% higher in aeroponics (28.53 ± 8.74 g; 4.26 ± 1.23 g), but similar in the DRF (20.19 ± 6.57 g; 2.83 ± 0.90 g) and raft (20.35 ± 7.14 g; 2.84 ± 1.04 g). The roots in the DRF grew shorter and thicker; however, this resulted in a higher root dry weight in aeroponics (1.08 ± 0.38 g) compared with the DRF (0.82 ± 0.36 g) and raft (0.67 ± 0.27 g). With optimal fertilizer and system improvement, aquaponic aeroponics (s.s.) could become a productive and sustainable large-scale food production system in the future. Due to its simple construction, the raft is ideal for domestic or semi-commercial use and can be used in areas where water is neither scarce nor expensive. The DRF system is particularly suitable for basil cultivation under hot tropical conditions.

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