Protective Effect of Chloride on Nitrite Toxicity to Coho Salmon (Oncorhynchus kisutch)

1977 ◽  
Vol 34 (4) ◽  
pp. 486-492 ◽  
Author(s):  
Stephen J. Perrone ◽  
Thomas L. Meade
Keyword(s):  
Protective Effect ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Chloride Ion ◽  
Nitrite Nitrogen ◽  
Nitrite Toxicity ◽  
Flow Through

Tolerance of coho salmon (Oncorhynchus kisutch) to nitrite was increased when the concentration of chloride ion in the environment was high. The results of flow-through bioassays revealed that no mortality occurred when yearling coho salmon were subjected to nitrite-nitrogen (NO2−–N) of 29.8 mg/ℓ and chloride (Cl−) of 261.3 mg/ℓ for 48 h. When yearling coho salmon were exposed to 3.8 mg/ℓ NO2−–N and 2.5 mg/ℓ Cl− for 12 h, the resultant mortality was 58.3%. Possibly, chloride competes with nitrite for transport across the gills and integumental tissues, thereby interfering with the onset of nitrite-induced methemoglobinemia.

Physiological Responses to Challenge Tests in Six Stocks of Coho Salmon (Oncorhynchus kisutch)

1991 ◽  
Vol 48 (9) ◽  
pp. 1761-1771 ◽  
Author(s):  
James C. McGeer ◽  
Leanne Baranyi ◽  
George K. Iwama
Keyword(s):  
Plasma Glucose ◽  
Thermal Tolerance ◽  
Coho Salmon ◽  
Salt Water ◽  
Oncorhynchus Kisutch ◽  
Chloride Ion ◽  
Tolerance Test ◽  
Plasma Sodium ◽  
High Ph ◽  
Challenge Tests

Coho salmon (Oncorhynchus kisutch) from six hatcheries were reared in a common facility and then subjected to six different challenge tests. Results indicated that there are differences in the response to stressful challenges among stocks of coho salmon. The challenge tests were exposure to salt water (30‰), high pH (9.4 and 10.0), low pH (3.55, 3.65, 3.75, and 4.1), thermal increase (1°C∙h−1), disease (bacterial kidney disease), and handling (30-s netting and emersion). The measured responses were changes in plasma sodium and chloride ion concentrations for the saline and pH challenges, critical thermal maximum in the thermal tolerance test, mortalities in the disease challenge, and plasma glucose alterations in the handling challenge. The Chehalis River stock was most successful in tolerating salt water but showed the largest plasma ion decrease in acidic waters. The stock from Eagle River had the lowest plasma glucose increase during handling challenges. In the disease challenge the Tenderfoot Creek and Eagle River stocks had high mortalities but the Capilano River stock had the lowest mortality. No stock differences were found during thermal tolerance and high pH challenges. An assessment of overall stock performance across challenges showed that each stock had a unique response profile.

Induced ovulation in coho salmon (Oncorhynchus kisutch). I. Further studies on the use of salmon pituitary preparations

Aquaculture ◽  
1981 ◽  
Vol 26 (1-2) ◽  
pp. 117-127 ◽  
Author(s):  
George A. Hunter ◽  
Edward M. Donaldson ◽  
Helen M. Dye
Keyword(s):  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Induced Ovulation

Physiological Response of Juvenile Coho Salmon (Oncorhynchus kisutch) and Rainbow Trout (Salmo gairdneri) to Handling and Crowding Stress in Intensive Fish Culture

1976 ◽  
Vol 33 (12) ◽  
pp. 2699-2702 ◽  
Author(s):  
Gary A. Wedemeyer
Keyword(s):  
Rainbow Trout ◽  
Feeding Behavior ◽  
Coho Salmon ◽  
Physiological Stress ◽  
Oncorhynchus Kisutch ◽  
Fish Distribution ◽  
Salmo Gairdneri ◽  
Crowding Stress ◽  
Normal Feeding ◽  
Intensive Fish Culture

Moving 4–5-in. coho salmon (Oncorhynchus kisutch) held in soft (20 ppm CaCO3) water from the relatively light loading density of 0.5 lb/ft3 to 1, 2, or 4 lb/ft3 (density index, DI = 0.1, 0.2, 0.4, 0.8) caused significant stress as indicated by loss of feeding behavior, but only minimal physiological disturbances, as indicated by lack of hyperglycemia or hypochloremia. However, moving them to 6 or 12 lb/ft3 (DI = 1.2, 2.4) caused significant physiological stress which required at least a week for recovery. Smolting coho salmon were physiologically stressed by population densities of 1 lb/ft3 or more and a subclinical corynebacterial kidney infection was activated. Rainbow trout (Salmo gairdneri) (4–5 in.) were physiologically stressed when moved and held at 1 lb/ft3 or more but retained normal feeding behavior. This indicates that handling and crowding stress will be minimized in softwater areas if densities in fish distribution trucks or in ponds or raceways during disease treatments are held to 0.1–0.5 lb/gal.

scholarly journals Hyperbilirubinemia of Coho Salmon Oncorhynchus kisutch Infected with Erythrocytic Inclusion Body Syndrome (EIBS) Virus

1994 ◽  
Vol 60 (5) ◽  
pp. 519-521 ◽  
Author(s):  
Tadashi Sakai ◽  
Hisashi Murata ◽  
Kiyoshi Yamauchi ◽  
Kiyotaka Takahashi ◽  
Nobuaki Okamoto ◽  
...  
Keyword(s):  
Inclusion Body ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch

Correlated response of flesh color to selection for harvest weight in coho salmon ( Oncorhynchus kisutch )

Aquaculture ◽  
2017 ◽  
Vol 472 ◽  
pp. 38-43 ◽  
Author(s):  
Pablo Dufflocq ◽  
Jean P. Lhorente ◽  
Rama Bangera ◽  
Roberto Neira ◽  
Scott Newman ◽  
...  
Keyword(s):  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Correlated Response ◽  
Flesh Color ◽  
Selection For
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