scholarly journals Moderate stocking density does not influence the behavioural and physiological responses of rainbow trout ( Oncorhynchus mykiss ) in organic aquaculture

2020 ◽  
Vol 51 (7) ◽  
pp. 3007-3016 ◽  
Author(s):  
Pierluigi Carbonara ◽  
Sébastien Alfonso ◽  
Francesco Gai ◽  
Laura Gasco ◽  
Giovanni Palmegiano ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Physiological Responses ◽  
Stocking Density ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Organic Aquaculture

scholarly journals Effects of Low Stocking Densities on Zootechnical Parameters and Physiological Responses of Rainbow Trout (Oncorhynchus mykiss) Juveniles

Biology ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1040
Author(s):  
Jérôme Roy ◽  
Frederic Terrier ◽  
Michael Marchand ◽  
Alexandre Herman ◽  
Cécile Heraud ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Feed Efficiency ◽  
Physiological Responses ◽  
Stocking Density ◽  
Average Weight ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Recirculating Aquaculture ◽  
Immune Biomarkers ◽  
Immune Related Genes

The present study investigated the effect of low stocking density on growth, survival, feed parameters and physiological responses (blood metabolites, welfare indicators, immune biomarkers, and transcriptomic responses of stress and immune-related genes) on juvenile rainbow trout (Oncorhynchus mykiss) reared under a recirculating aquaculture system during 12 weeks. Fish (average weight 29.64 g) were reared in triplicate under four initial densities: nine fish per tank (D9, 3.76 ± 0.06 kg/m3), 18 fish per tank (D18, 7.66 ± 0.18 kg/m3), 27 fish per tank (D27, 9.67 ± 0.01 kg/m3) and 36 fish per tank (D36, 12.94 ± 0.14 kg/m3). Results showed that lower stocking density D9 significantly altered survival with several fish dying during the experiment and an alteration of growth and feed efficiency for the remaining fish. In parallel, the study revealed that low stocking density induced a chronic stress altering the physiological responses of trout by dysregulation of the inflammatory, immune system, and indolamine/catecholamine brain levels. In conclusion, regarding all the variables observed, low stocking density (D9) alters survival, growth and feed efficiency of rainbow trout with alteration of their physiological responses. Selecting appropriate fish density relating to rearing conditions proved to be an essential concern to improve welfare in an aquaculture context.

Effects of stocking density on the growth and flesh quality of rainbow trout (Oncorhynchus mykiss) reared in a low-tech aquaponic system

Aquaculture ◽  
2020 ◽  
Vol 529 ◽  
pp. 735653
Author(s):  
Marco Birolo ◽  
Francesco Bordignon ◽  
Angela Trocino ◽  
Luca Fasolato ◽  
Antón Pascual ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Stocking Density ◽  
Flesh Quality ◽  
Rainbow Trout Oncorhynchus Mykiss

Physiological Responses of Rainbow Trout (Oncorhynchus mykiss) to Prolonged Exposure to Soft Water

1996 ◽  
Vol 69 (6) ◽  
pp. 1419-1441 ◽  
Author(s):  
S. F. Perry ◽  
S. G. Reid ◽  
E. Wankiewicz ◽  
V. Iyer ◽  
K. M. Gilmour
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Prolonged Exposure ◽  
Physiological Responses ◽  
Soft Water ◽  
Rainbow Trout Oncorhynchus Mykiss

The impact of stocking density on the welfare of rainbow trout (Oncorhynchus mykiss)

Aquaculture ◽  
2006 ◽  
Vol 255 (1-4) ◽  
pp. 466-479 ◽  
Author(s):  
B.P. North ◽  
J.F. Turnbull ◽  
T. Ellis ◽  
M.J. Porter ◽  
H. Migaud ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Stocking Density ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
The Impact
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