Growth and Fecundity of Rainbow Trout (Salmo gairdneri) Exposed to Single Sublethal Doses of X-rays During the Eyed Embryo Stage

1971 ◽  
Vol 28 (8) ◽  
pp. 1181-1184 ◽  
Author(s):  
Arthur D. Welander ◽  
Gerald W. Wadley ◽  
Douglas K. Dysart
Keyword(s):  
Rainbow Trout ◽  
Irradiation Dose ◽  
Egg Production ◽  
Salmo Gairdneri ◽  
X Rays ◽  
Embryo Stage ◽  
Sublethal Doses ◽  
Related Increase

When rainbow trout (Salmo gairdneri) were reared for 2 years after irradiation with 21, 83, and 203 roentgens (R) during the eyed stage, the irradiation had no demonstrable effect on survival, growth, or fecundity. The trout were reared at temperatures of 15.4 and 17.2 C in parallel experiments for 160 days after fertilization. At the end of 2 years, 65 female trout (and 56 males), averaging more than 1400 g in weight, produced 186,400 eggs. Egg production was not related to irradiation dose or temperature; however, there was a slight dose-related increase in number surviving to the eyed stage in most of the irradiated groups.

Endrin Toxicosis in Rainbow Trout (Salmo gairdneri)

1973 ◽  
Vol 30 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Blake F. Grant ◽  
Paul M. Mehrle
Keyword(s):  
Rainbow Trout ◽  
Total Protein ◽  
Serum Cortisol ◽  
Liver Glycogen ◽  
Salmo Gairdneri ◽  
Protein Distribution ◽  
Serum Electrolytes ◽  
Electrophoretic Patterns ◽  
Sublethal Doses ◽  
High Doses

In mature rainbow trout (Salmo gairdneri) receiving sublethal doses of endrin (4.3–145 × μg/kg body wt/day in 0.215–7.25 mg/kg of food) for 163 days and then forced to swim for 1 hr, the insecticide affected serum electrolytes, osmolality, total protein, cholesterol, cortisol, lactate, glucose, liver glycogen, and growth. Forced swimming alone altered 9 of 16 serum parameters examined. Apparent increases in serum Na and Cl and significant increases in osmolality and liver glycogen were directly related to dosage. A biphasic distribution of phosphate, total protein, and cholesterol with dosage was apparent. Glucose was increased about 50% by 145 μg/kg but was unaffected by lower doses. Variance analysis of zone electrophoretic patterns disclosed an in teraction between serum protein distribution and dose. Mobilization of liver glycogen was apparently inhibited by low doses and almost totally blocked by high doses. Correspondingly, trout given 14.5 μg/kg or more had lowered serum cortisol levels whereas the lowest dose elevated cortisol. Growth was inhibited appreciably by 145 μg/kg but not by lower doses. Visceral fat accumulated 4.8–8.7 μg endrin/g tissue in the 43 and 145 μg/kg exposures. We conclude that endrin caused dysfunction of physiologic processes critical to survival.

Serum estradiol-17β during the preovulatory development of the rainbow trout (Salmo gairdneri)

1985 ◽  
Vol 110 (1_Suppla) ◽  
pp. S163
Author(s):  
R. SCHULZ ◽  
V. BLÜM
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Serum Estradiol ◽  
Estradiol 17Β

STUDIES ON THE HORMONAL CONTROL OF SODIUM METABOLISM IN THE RAINBOW TROUT (SALMO GAIRDNERI)

1959 ◽  
Vol XXXI (IV) ◽  
pp. 587-602 ◽  
Author(s):  
W. N. Holmes
Keyword(s):  
Rainbow Trout ◽  
Hormonal Control ◽  
Salmo Gairdneri ◽  
Sodium Metabolism

A Comparison of Egg Production of Hatchery-Reared Brook, Brown, and Rainbow Trout

1960 ◽  
Vol 22 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Keen Buss ◽  
Raymond Mccreary
Keyword(s):  
Rainbow Trout ◽  
Egg Production

Temperature Selection of Rainbow Trout (Salmo gairdneri) Fingerlings in Vertical and Horizontal Gradients

1971 ◽  
Vol 28 (11) ◽  
pp. 1801-1804 ◽  
Author(s):  
R. W. McCauley ◽  
W. L. Pond
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Temperature Preference ◽  
Temperature Selection ◽  
Horizontal Gradients ◽  
Significant Difference ◽  
Preferred Temperatures ◽  
Laboratory Investigations ◽  
Horizontal Temperature Gradients ◽  
Selection Of

Preferred temperatures of underyearling rainbow trout (Salmo gairdneri) were determined in both vertical and horizontal temperature gradients. No statistically significant difference was found between the preferred temperatures by the two different methods. This suggests that the nature of the gradient plays a lesser role than generally believed in laboratory investigations of temperature preference.

scholarly journals The Distribution of 35S-Sulfadiazine and 14G-Trimethoprim in Rainbow Trout, Salmo Gairdneri

1979 ◽  
Vol 20 (1) ◽  
pp. 25-37 ◽  
Author(s):  
Torill Bergsjø ◽  
Inger Nafstad ◽  
Kristian Ingebrigtsen
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri
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