scholarly journals Effect of catch-and-release angling on growth and survival of rainbow trout, Oncorhynchus mykiss

2007 ◽  
Vol 14 (2) ◽  
pp. 115-121 ◽  
Author(s):  
K. L. POPE ◽  
G. R. WILDE ◽  
D. W. KNABE
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth And Survival ◽  
Catch And Release ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Telomere Dynamics in the Diploid and Triploid Rainbow Trout (Oncorhynchus mykiss) Assessed by Q-FISH Analysis

Genes ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 786 ◽  
Author(s):  
Ligia Panasiak ◽  
Stefan Dobosz ◽  
Konrad Ocalewicz
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Telomere Length ◽  
Cross Sectional Study ◽  
Fish Analysis ◽  
Telomeric Dna ◽  
Cross Sectional ◽  
Growth And Survival ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Telomere Dynamics

Changes of telomere length with age were assessed in diploid and triploid rainbow trout (Oncorhynchus mykiss) females in the cross-sectional study using Q-FISH technique. Triploid trout as sterile do not invest an energy in gametogenesis and continue to grow, whereas fertile diploid individuals suffer from declines in growth and survival during sexual maturation. However, triploid and diploid specimens exhibited similar patterns of telomere dynamics. Telomere length in the embryos, larvae and one-year-old juveniles did not change significantly. In the second year after hatching, subadults exhibited substantially shortened telomeres, while significant increase of the telomere length was reported in the three-year-old adults. On the other hand, correlation between telomere length and body size was observed in the triploid, but not in the diploid rainbow trout. Telomere shortening observed in two-year-old subadults may have been associated with the premature period of the fast growth in rainbow trout. Similar pattern of the telomere dynamics reported in the fertile diploids and sterile triploids indicated processes related to reproduction did not affect telomere dynamics in this species. Unexpected increase of the telomere length reported during the third year of life confirmed that in rainbow trout telomeric DNA shortens and lengthens, depending on the developmental stage.

scholarly journals Effects of copper microparticles on the growth and survival of juvenile rainbow trout (Oncorhynchus mykiss Wal.)

2021 ◽  
Vol 66 (4) ◽  
pp. 359-369
Author(s):  
Nebojsa Savic ◽  
Radoslav Dekic
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Total Body Length ◽  
Control Group ◽  
Preventive Action ◽  
Growth And Survival ◽  
Juvenile Rainbow Trout ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Significant Difference ◽  
Banja Luka

During the farming of juvenile rainbow trout (Oncorhynchus mykiss), losses can be very high. In aquaculture, various agents are used, such as copper, for the purpose of preventive action and prevention of the appearance of pathogens (ectoparasites, etc.). The aim of this study was to determine the effects of substrate-fixed copper microparticles on the growth and survival of juvenile rainbow trout (Oncorhynchus mykiss) up to the age of 5 months. The experiment was conducted in the Laboratory for Aquaculture of the Faculty of Agriculture, University of Banja Luka, for 142 days in flow aquariums with a 65 l/aquarium volume. The experiment was set up in two groups (150 units/group) with three replicates (50 units/replicate), a control group without copper microparticles (K) and a group with copper microparticles (Cu). The initial weight and total body length (mean ? SD) of rainbow trout in group K were 0.199 ? 0.008 g and 2.876 ? 0.036 cm, and in group Cu 0.197 ? 0.009 g and 2.893 ? 0.038 cm. The average total length and body weight of individuals from the K and Cu groups were similar (p > 0.05). The differences in FCR, CF, SGR and TGC between group K and group Cu were not statistically significant (p > 0.05). Survival of juvenile rainbow trout was high and it was 97.33% in group K and 96.00% in group Cu, and no statistically significant difference was found (p > 0.05). The growth and survival of juvenile rainbow trout in the K and Cu groups were similar.

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