scholarly journals Blood Biomarkers in Nile tilapia Oreochromis niloticus niloticus and African Catfish Clarias gariepinus to Evaluate Water Quality of the River Nile

2018 ◽  
Vol 12 (1) ◽  
Author(s):  
Alaa G M Osman ◽  
Khaled Y AbouelFadl ◽  
Abd El Baset M Abd El Reheem ◽  
Usama M Mahmoud ◽  
Werner Kloas ◽  
...  
Keyword(s):  
Water Quality ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
River Nile ◽  
Blood Biomarkers ◽  
Nile Tilapia Oreochromis Niloticus

scholarly journals Clock‐Controlled Endogenous Melatonin Rhythms in Nile Tilapia (Oreochromis niloticus niloticus) and African Catfish (Clarias gariepinus)

2008 ◽  
Vol 25 (1) ◽  
pp. 31-49 ◽  
Author(s):  
Carlos Christian Martinez‐Chavez ◽  
Sammi Al‐Khamees ◽  
Antonio Campos‐Mendoza ◽  
David James Penman ◽  
Herve Migaud
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Endogenous Melatonin

scholarly journals Comparative Histomorphological and Histochemical Studies on the Oesophagus of Nile Tilapia Oreochromis niloticus and African Catfish Clarias gariepinus

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Ashraf Sayed Awaad ◽  
Usama Kamal Moawad ◽  
Mohamed Gomaa Tawfiek
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Feeding Habits ◽  
Periodic Acid ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Epithelial Surface ◽  
Oesophageal Mucosa ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Mucosal Folds

The present work aimed to describe and compare both gross and microscopic structure of the oesophagus of Nile tilapia (Oreochromis niloticus) and African catfish (Clarias gariepinus). For this purpose, 60 specimens of oesophagus of Nile tilapia (omnivorous fish) and African catfish (carnivorous fish) were collected and processed. Anatomically, the oesophagus of both species appeared as a short tube with longitudinal mucosal folds. Using scanning electron microscope, the epithelial surface of the esophagus showed primary and secondary mucosal folds in both species while tertiary folds were observed in that of tilapia only. Histologically, the oesophagus consisted of four distinct layers: mucosa, submucosa, muscularis, and serosa. The oesophageal mucosa consisted of stratified epithelium with few mucous secreting cells in catfish and many mucous secreting cells in tilapia. Two types of mucous secreting cells reacted positively with both periodic acid shiff (PAS) and alcian blue (AB); rounded and elongated cells that were recognized in the esophageal epithelium of tilapia and only elongated oval cells were observed in that of catfish. In conclusion, the obtained histomorphological differences in esophagus of both fish species may be attributed to their different feeding habits and type of food.

scholarly journals Water Quality in the Cultivation of Catfish (Clarias gariepinus) and Nile Tilapia (Oreochromis niloticus) in the Aquaponic Biofloc System

2019 ◽  
pp. 1-6
Author(s):  
Irfan Zidni ◽  
Iskandar . ◽  
Ibnu Dwi Buwono ◽  
Benedikta Prasiwi Mahargyani
Keyword(s):  
Water Quality ◽  
Nile Tilapia ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Quality Of Water ◽  
Randomized Design ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Nitrite Nitrate ◽  
Fish Productivity

Aims: Water quality is one of them being an important role in terms of cultivation. Good water quality can support growth productivity in aquaculture. This is also of great concern when the rest of fish metabolism results that can contaminate fish contained in the maintenance media and if water is changed every day, water carrying toxins can pollute the area around the cultivation. One of the first steps to reduce the toxic content found in the maintenance media and the area around cultivation is to use aquaponic cultivation using biofloc. It is also expected to minimize the toxin content in maintenance media. This research aims to determine the comparison of the polyculture stocking density of sangkuriang catfish and nile tilapia which results in water quality that supports fish productivity. Study Design:  The research was conducted experimentally. Place and Duration of Study: This research was carried out for 40 days between March 2019 - April 2019 in the Ciparanje Laboratory of the Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. Methodology: The method used in this research is experimental using a completely randomized design (CRD), consisting of 5 treatments with 3 replications. The treatments to be given are dense stocking variations with the following treatments: A(75 catfish:75 tilapia), B(100 catfish:50 tilapia), C(125 catfish:25 tilapia), D(150 catfish), E(150 tilapia). Results: Water Quality Measured During The Study Namely, DO, Temperature, Ph, Nitrite, Nitrate And Ammonia Are Still In The Threshold For The Growth Of Test Animals During Maintenance. Conclusion: Based on the results of the research that has been done, it can be concluded that the quality of water in maintenance media using aquaponics biofloc gives good water quality values on maintenance media and is still within the threshold for the growth of catfish and tilapia.

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