A methemoglobin reductase system in channel catfish Ictalurus punctatus

1982 ◽  
Vol 60 (6) ◽  
pp. 1511-1513 ◽  
Author(s):  
David W. Huey ◽  
Thomas L. Beitinger
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Screening Test ◽  
Free Water ◽  
Rapid Recovery ◽  
Partial Explanation

A modified spot screening test for methemoglobin reductase (MHb reductase), indicated that this enzyme occurs in channel catfish, Ictalurus punctatus. The presence of MHb reductase offers at least a partial explanation of the rapid recovery observed when catfish with profound nitrite-induced methemoglobinemia are placed in nitrite-free water.

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

Influence of Fat Content on Uptake and Depuration of the Off-flavor 2-Methylisoborneol by Channel Catfish (Ictalurus punctatus)

1992 ◽  
Vol 49 (11) ◽  
pp. 2406-2411 ◽  
Author(s):  
Peter B. Johnsen ◽  
Steven W. Lloyd
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Analytical Method ◽  
Free Water ◽  
Fat Content ◽  
Flavor Compound ◽  
Lean Fish ◽  
The Impact

Channel catfish (Ictalurus punctatus) of different tissue fat contents (0.5–11.0%) were held in water containing approximately 0.5 μg/L of the off-flavor compound 2-methylisoborneol (MIB) for various times. A new analytical method was developed to quantify tissue burdens of MIB. Fish showed significant bioconcentration of MIB after 2 h and equilibrium by 24 h. The fatter fish (> 2.5% muscle fat) accumulated nearly three times more MIB than lean fish (< 2%). Purging fish in MIB-free water indicated that leaner fish depurate faster (8 h) than fatter fish (48 h). Fat content had more influence in determining the time for return to acceptable flavor than initial MIB concentration. Managing catfish production to harvest leaner fish could minimize the impact of off-flavor on fish producers.

Dietary calcium requirement of channel catfish Ictalurus punctatus, reared in calcium-free water

Aquaculture ◽  
1986 ◽  
Vol 53 (3-4) ◽  
pp. 263-270 ◽  
Author(s):  
Edwin H. Robinson ◽  
Steven D. Rawles ◽  
Paul B. Brown ◽  
Harold E. Yette ◽  
L.Wayne Greene
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Free Water ◽  
Dietary Calcium ◽  
Calcium Requirement

Preparation and characterization of collagen polypeptide chelated calcium from fish bone powder of channel catfish(Ictalurus punctatus)

2012 ◽  
Vol 36 (2) ◽  
pp. 314
Author(s):  
Jian-feng LU ◽  
Chang-wei MENG ◽  
Jin LI ◽  
Zi-hui GONG ◽  
Lin LIN ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Fish Bone ◽  
Bone Powder

Bioeconomic Analysis of Flavobacterium columnare Vaccine Pond Trials with Channel Catfish Ictalurus punctatus

2021 ◽  
Author(s):  
Jillian K. Malecki ◽  
Luke A. Roy ◽  
Cova R. Arias ◽  
Miles D. Lange ◽  
Craig A. Shoemaker ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Flavobacterium Columnare

Novel polymorphisms in Stearoyl‐CoA Desaturase (SCD) and Fatty Acid Desaturase 2 (FADS2) in channel catfish ( Ictalurus punctatus, Rafinesque, 1818 )

2021 ◽  
Author(s):  
Oliva Mendoza‐Pacheco ◽  
Gaspar Manuel Parra‐Bracamonte ◽  
Xochitl Fabiola De la Rosa‐Reyna ◽  
Ana María Sifuentes‐Rincón ◽  
Isidro Otoniel Montelongo‐Alfaro ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Fatty Acid Desaturase ◽  
Stearoyl Coa Desaturase ◽  
Fatty Acid Desaturase 2
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