Factors affecting male potency in pooled gamete crosses of rainbow trout,Oncorhynchus mykiss

1995 ◽  
Vol 42 (3) ◽  
pp. 267-275 ◽  
Author(s):  
Stephen R. Gile ◽  
Moira M. Ferguson
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Factors Affecting ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Dietary low-glucosinolate rapeseed meal affects thyroid status and nutrient utilization in rainbow trout (Oncorhynchus mykiss)

2000 ◽  
Vol 83 (6) ◽  
pp. 653-664 ◽  
Author(s):  
Christine Burel ◽  
Thierry Boujard ◽  
Anne-Marie Escaffre ◽  
Sadasivam J. Kaushik ◽  
Gilles Boeuf ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Fish Meal ◽  
Rapeseed Meal ◽  
Nutrient Utilization ◽  
Antinutritional Factors ◽  
Type I ◽  
Growth Depression ◽  
Factors Affecting ◽  
Rainbow Trout Oncorhynchus Mykiss

Two rapeseed (Brassica napus) meals, RM1 and RM2, with two levels of glucosinolates (GLS; 5 and 41 μmol/g DM respectively) were incorporated at the levels of 300 and 500 g/kg of the diets of juvenile rainbow trout (Oncorhynchus mykiss) in replacement of fish meal, and compared with a fish-meal-based diet. A decrease in the digestibility of the DM, protein, gross energy and P was observed with high-rapeseed meal (RM) incorporation. In trout fed on RM-based diets, growth performance was reduced even after only 3 weeks of feeding. Feed efficiency was adversely affected by RM and GLS intake. Protein and energy retention coefficients were significantly lower in fish fed on the diet containing the higher level of GLS. P retention was significantly lower with all the RM-based diets than with the fish-meal diet. Irrespective of the degree of growth inhibition, fish fed on RM-based diets exhibited similar typical features of hypothyroid condition due to GLS intake, expressed by lower plasma levels of triiodothyronine and especially thyroxine and a hyperactivity of the thyroid follicles. This hypothyroidal condition led to a strong adjustment of the deiodinase activities in the liver, the kidney and the brain. A significant increase of the outer ring deiodinase activities (deiodinases type I and II respectively) and a decrease of the inner ring deiodinase activity (deiodinase type III) were observed. It is concluded that the observed growth depression could be attributed to the concomitant presence of GLS, depressing the thyroid function, and of other antinutritional factors affecting digestibility and the metabolic utilization of dietary nutrients and energy.

Physiological factors affecting triploid production in rainbow trout, Oncorhynchus mykiss

Aquaculture ◽  
1993 ◽  
Vol 114 (1-2) ◽  
pp. 33-40 ◽  
Author(s):  
N.F. Diaz ◽  
P. Iturra ◽  
A. Veloso ◽  
F. Estay ◽  
N. Colihueque
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Physiological Factors ◽  
Factors Affecting ◽  
Rainbow Trout Oncorhynchus Mykiss

Factors affecting swim bladder volume in rainbow trout (Oncorhynchus mykiss) held in gas supersaturated water

1990 ◽  
Vol 68 (5) ◽  
pp. 962-968 ◽  
Author(s):  
J. M. Shrimpton ◽  
D. J. Randall ◽  
L. E. Fidler
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Partial Pressure ◽  
Strong Dependence ◽  
Arterial System ◽  
Bladder Pressure ◽  
Small Fish ◽  
Swim Bladder ◽  
Factors Affecting ◽  
Rainbow Trout Oncorhynchus Mykiss

We examined the response of the rainbow trout (Oncorhynchus mykiss) swim bladder to gas supersaturated water. Cannulas positioned in the swim bladder of fish were connected to a pressure transducer, allowing direct measurement of swim bladder pressure. When denied access to the surface, fish held in supersaurated water showed an increase in swim bladder pressure. This response showed a strong dependence on the total gas pressure and the oxygen partial pressure of the water. The minimum level of gas supersaturation observed to cause this response corresponds to a ΔP of 27 mmHg [Formula: see text]; 1 mmHg = 133.3 Pa). The threshold ΔP for swim bladder inflation increased as the partial pressure of dissolved oxygen increased. Movement of supersaturated gases from the arterial system into the swim bladder is passive and causes a rise in swim bladder pressure until the diffusion gradient is nil or the gas is expelled through the pneumatic duct. The threshold for release of gas out the pneumatic duct is dependent on the size of the fish. Small fish have higher duct release pressures and are subject to a higher degree of pressure buildup within the swim bladder than larger fish.

The essential oils of some medicinal plants on the immune system of rainbow trout (Oncorhynchus mykiss)

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
A Ghasemi Pirbalouti ◽  
E Pirali ◽  
G Pishkar ◽  
S Mohammadali Jalali ◽  
M Reyesi ◽  
...  
Keyword(s):  
Immune System ◽  
Rainbow Trout ◽  
Medicinal Plants ◽  
Oncorhynchus Mykiss ◽  
Essential Oils ◽  
Rainbow Trout Oncorhynchus Mykiss
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