Morphological, Histological and Ultrastructural Evidences of the Stannius Corpuscles in Fresh Water Teleost (Oreochromis niloticus) and Marine Teleost (Epinephilus tuvina)

2006 ◽  
Vol 17 (1) ◽  
pp. 59-77 ◽  
Author(s):  
Osama AbuZinadah ◽  
Suzan Abdu ◽  
Al-Sayeda AbdulAziz
Keyword(s):  
Fresh Water ◽  
Oreochromis Niloticus ◽  
Marine Teleost ◽  
Fresh Water Teleost ◽  
Stannius Corpuscles

scholarly journals The Chemical Composition of the Blood of Some Aquatic Chordates, Including Members of the Tunicata, Cyclostomata and Osteichthyes

1954 ◽  
Vol 31 (3) ◽  
pp. 424-442
Author(s):  
JAMES D. ROBERTSON
Keyword(s):  
Fresh Water ◽  
Sea Water ◽  
Total Concentration ◽  
Ionic Composition ◽  
Marine Teleost ◽  
Sulphate Content ◽  
Bony Fishes ◽  
Concentration Of Ions ◽  
Fresh Water Teleost ◽  
Fish Kidney

1. Fairly complete analyses have been given of the blood of certain tunicates, cyclostomes, and bony fishes. 2. The plasma of the tunicates Phallusia mammillata and Salpa maxima closely resembles sea water in ionic composition, except for a very reduced sulphate content. Protein is less than 1 g./l. 3. The serum of Myxine glutinosa is isosmotic with sea water within about 1%. Every ion is regulated; sodium and phosphate exceed their respective values in sea water, and the remaining ions are lower, especially sulphate and magnesium. Two values for urea are 122 and 255 mg./kg. water, the higher figure being about 0.3% of the total concentration of ions and non-electrolytes. 4. The composition of the plasma of Lampetra fluviatilis from fresh water resembles that of Coregonus clupeoides, a fresh-water teleost. Muraena helena, a marine teleost, maintains a total concentration of ions about one-third that of sea water. It differs from fresh-water teleosts chiefly in maintaining much higher sodium and chloride concentrations. 5. The implications of the dichotomy in osmotic and ionic regulation of myxinoids and petromyzonts are considered, and also the glomerular nature of the cyclostome and fish kidney.

scholarly journals Dietary sodium requirement determined for juvenile hybrid tilapia (Oreochromis niloticus × O. aureus) reared in fresh water and seawater

2004 ◽  
Vol 91 (4) ◽  
pp. 585-590 ◽  
Author(s):  
Shi-Yen Shiau ◽  
Li-Shan Lu
Keyword(s):  
Weight Gain ◽  
Atpase Activity ◽  
Fresh Water ◽  
Oreochromis Niloticus ◽  
Polynomial Regression ◽  
Control Diet ◽  
Dietary Treatment ◽  
Basal Diet ◽  
Dietary Sodium ◽  
Whole Body

Two 8-week feeding trials were conducted to determine the dietary Na requirement for juvenile hybrid tilapia (Oreochromis niloticus × O. aureus) reared in fresh water and seawater. In each experiment, NaCl was added to the basal diet at 0, 0·5, 1, 2, 3, 5, or 7g Na/kg diet (fresh water) and at 0, 0·2, 0·5, 0·8, 1·2, 1·5, 2, or 3g Na/kg diet (seawater). Each diet was fed to three replicate groups of fish, individual fish initially weighing 0·69 (se 0·01) g, in a closed, recirculating rearing system. In fresh water, the tilapia fed the diet supplemented with 2g Na/kg diet had significantly (P<0·05) greater weight gain than the fish fed the diets supplemented with ≥3 and ≤0·5g Na/kg diet. Feed efficiency (FE) in fish generally followed the weight-gain pattern. Gill Na+–K+ ATPase activity was highest in the fish fed the diets supplemented with 1–3g Na/kg diet, followed by the fish fed the diet with 7g Na/kg diet and lowest in the fish fed the unsupplemented control diet. In seawater, the weight gain, FE and gill Na+–K+ ATPase activity in fish were not affected by the dietary treatment. Analysis by polynomial regression of weight gain, by broken-line regression of gill Na+–K+ ATPase activity and by linear regression of whole-body Na retention of the fish reared in fresh water, indicated that the adequate dietary Na concentration for tilapia is about 1·5g/kg diet. The present study also suggests that no dietary Na is required for tilapia reared in seawater.

Sex steroids exert a suppressive effect on innate and cell mediated immune responses in fresh water teleost, Channa punctatus

2019 ◽  
Vol 100 ◽  
pp. 103415 ◽  
Author(s):  
Sunita Patel ◽  
Meghmala Choudhary ◽  
Rakesh Kumar Chandra ◽  
Ajay Kumar Bhardwaj ◽  
Manish Kumar Tripathi
Keyword(s):  
Immune Responses ◽  
Fresh Water ◽  
Sex Steroids ◽  
Suppressive Effect ◽  
Channa Punctatus ◽  
Fresh Water Teleost
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