Influence of a Bacterial Amendment on Water Quality in Small Research Ponds for Channel Catfish,Ictalurus punctatus, Production

2016 ◽  
Vol 47 (4) ◽  
pp. 464-469 ◽  
Author(s):  
Yilin Li ◽  
Claude E. Boyd
Keyword(s):  
Water Quality ◽  
Ictalurus Punctatus ◽  
Channel Catfish

Nitrification in an Aquatic Recirculating System

1975 ◽  
Vol 32 (11) ◽  
pp. 2025-2031 ◽  
Author(s):  
M. T. Collins ◽  
J. B. Gratzek ◽  
E. B. Shotts Jr. ◽  
D. L. Dawe ◽  
Lucy M. Campbell ◽  
...  
Keyword(s):  
Water Quality ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Total Weight ◽  
Quality Changes ◽  
Bacterial Counts

Water quality changes during establishment and maintenance of nitrification in four 70-liter recirculating systems each containing 20 channel catfish (Ictalurus punctatus) (total weight 150 g) are described. Establishment of nitrification took 33 days. During establishment of nitrification, all catfish in the systems died. Death appeared to be related to nitrite concentrations greater than 2.5 mg/liter NO2-N. The pH declined with progressive nitrification. When the pH was less than 6.0, nitrification ceased. Within 2 wk of introducing the catfish, total bacterial counts stabilized at 106 organisms per milliliter. Counts of lactose fermenters and aeromonads fluctuated around 104 organisms per milliliter when fish were in the system and decreased markedly after the fish were removed. After establishment of nitrification, 40 channel catfish (total weight 100 g) were maintained successfully for 37 days.

scholarly journals Recirculation anaesthesia for laboratory fish

1987 ◽  
Vol 21 (3) ◽  
pp. 210-215 ◽  
Author(s):  
L. A. Brown
Keyword(s):  
Water Quality ◽  
Surgical Procedures ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Ammonia Nitrogen ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Total Ammonia Nitrogen ◽  
Total Ammonia

An economic reliable long-term recirculation anaesthesia system for laboratory fish is described. Anaesthesia of channel catfish ( Ictalurus punctatus Rafinesque) was induced within 60 s and was maintained for up to 40 min using tricaine methanesulphonate; recovery occurred within 30-60 s. Various surgical procedures were performed on the fish. No deaths were recorded. All water-quality parameters tested over 19 days use of the system remained stable except for total ammonia nitrogen and, by calculation, un-ionized ammonia which increased to a maximum of 0·23 mg/1.

Water quality and stocking density as stressors of channel catfish (Ictalurus punctatus Raf.)

Aquaculture ◽  
1983 ◽  
Vol 30 (1-4) ◽  
pp. 263-272 ◽  
Author(s):  
Heiner Klinger ◽  
Hartmut Delventhal ◽  
Volker Hilge
Keyword(s):  
Water Quality ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Stocking Density

Ammonia-Caused Gill Damage in Channel Catfish (Ictalurus punctatus): Confounding Effects of Residual Chlorine

1983 ◽  
Vol 40 (2) ◽  
pp. 242-247 ◽  
Author(s):  
Stephen J. Mitchell ◽  
Joseph J. Cech Jr.
Keyword(s):  
Water Quality ◽  
Causative Agent ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Free Water ◽  
Gill Tissue ◽  
Residual Chlorine ◽  
Sewage Effluent ◽  
Histological Evidence ◽  
Municipal Water

Histological evidence failed to confirm that ammonia is a direct causative agent of gill hyperplasia, as previously believed, in channel catfish, Ictalurus punctatus. Levels of residual chlorine compounds, which are typical of charcoal-filtered municipal water or chlorinated sewage effluent, together with moderate ammonia levels caused severe gill hyperplasia. These results both question the validity of attributing gill tissue hyperplasia to ammonia alone by past investigations and emphasize the serious problem of obtaining contaminant-free water for aquatic toxicological studies.Key words: Ictalurus punctatus, channel catfish; ammonia, gills, chloramine, hyperplasia, water quality

Toxicity of Nitrite to Channel Catfish (Ictalurus punctatus), Tilapia (Tilapia aurea), and Largemouth Bass (Micropterus salmoides): Evidence for a Nitrite Exclusion Mechanism

1984 ◽  
Vol 41 (12) ◽  
pp. 1739-1744 ◽  
Author(s):  
R. M. Palachek ◽  
J. R. Tomasso
Keyword(s):  
Water Quality ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Largemouth Bass ◽  
Micropterus Salmoides ◽  
Environmental Concentrations ◽  
Median Lethal Concentrations ◽  
Exclusion Mechanism ◽  
Plasma Nitrite ◽  
Differential Ability

The 96-h median lethal concentrations of nitrite to channel catfish (Ictalurus punctatus), tilapia (Tilapia aurea), and largemouth bass (Micropterus salmoides) under similar water quality conditions were 7.1 ± 1.9, 16.2 ± 2.3, and 140.2 ± 8.1 mg NO2-N/L (mean ± SE), respectively (pH 7.7–8.2; temperature 23 °C). During 24-h sublethal exposures to nitrite, methemoglobin concentrations in the blood of all three species generally increased with increasing nitrite concentrations. Channel catfish and tilapia concentrated nitrite in their blood above environmental levels and generated higher methemoglobin concentrations than largemouth bass at all nitrite concentrations tested. Largemouth bass did not develop elevated methemoglobin concentrations until NO2-N concentrations reached 48.7 mg/L, and plasma nitrite concentrations in largemouth bass were never observed higher than environmental concentrations. These data indicate that differences in resistance to nitrite among species may be partially due to a differential ability of some species to prevent the concentration of nitrite in the plasma.

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