Influence of Cryptobia salmositica on feeding, body composition, and growth in rainbow trout

1991 ◽  
Vol 69 (5) ◽  
pp. 1397-1401 ◽  
Author(s):  
L. Lowe-Jinde ◽  
A. M. Zimmerman
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Parasitic Infection ◽  
Fat Content ◽  
Ash Content ◽  
Fish Stock ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Meal Consumption

Rainbow trout, Oncorhynchus mykiss, were experimentally infected with the blood haemoflagellate Cryptobia salmositica. The parasitic infection significantly decreased voluntary meal consumption and growth. An analysis of the proximate body composition showed that the Cryptobia infection was associated with increased water, protein, and ash content, while the fat content was reduced. Also, higher mortality and a higher level of parasitemia were observed in fish stock from one local hatchery compared with that in fish stock from another local hatchery.

The effects of dietary fat content on performance and body composition of farmed rainbow trout (Oncorhynchus mykiss)

Aquaculture ◽  
1997 ◽  
Vol 151 (1-4) ◽  
pp. 173-184 ◽  
Author(s):  
R.N. Weatherup ◽  
K.J. McCracken ◽  
R. Foy ◽  
D. Rice ◽  
J. McKendry ◽  
...  
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Dietary Fat ◽  
Fat Content ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Graded Incorporation of Defatted Yellow Mealworm (Tenebrio molitor) in Rainbow Trout (Oncorhynchus mykiss) Diet Improves Growth Performance and Nutrient Retention

Animals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 187 ◽  
Author(s):  
Paulo Rema ◽  
Subramanian Saravanan ◽  
Benjamin Armenjon ◽  
Constant Motte ◽  
Jorge Dias
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Tenebrio Molitor ◽  
Nutrient Digestibility ◽  
Protein Meal ◽  
Yellow Mealworm ◽  
Juvenile Rainbow Trout ◽  
Rainbow Trout Oncorhynchus Mykiss

Insects are emerging as a sustainable alternative to fishmeal and fish oil in aquafeeds. This study assessed the effect of graded incorporation levels of defatted yellow mealworm (Tenebrio molitor) protein meal on juvenile rainbow trout (Oncorhynchus mykiss) growth performance, body composition, and apparent nutrient digestibility. The trial comprised five dietary treatments: control diet with 25% fishmeal, and four experimental diets with yellow mealworm protein meal at 5%, 7.5%, 15%, or 25%, which corresponded to a fishmeal replacement of 20%, 30%, 60%, or 100%, respectively. After 90 days, the graded incorporation of insect protein meal led to a significant stepwise increase in final body weight, and a significant improvement of specific growth rate, feed conversion ratio, and protein efficiency ratio compared to the control treatment. Regardless of the incorporation level, the insect protein meal had no effects on fish whole-body composition and apparent digestibility coefficients of dry matter, protein, fat, phosphorus, and energy. Protein, phosphorus, and energy retention significantly increased in fish fed the diets with an insect protein meal. In conclusion, the yellow mealworm protein meal could effectively replace 100% of fishmeal in the diet of juvenile rainbow trout with positive effects on its overall zootechnical performance.

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