The effects of oxygen depletion due to upwelling groundwater on the post-hatch fitness of Atlantic salmon (Salmo salar)
The effects of oxygen depletion due to upwelling groundwater on the post-hatch fitness of Atlantic salmon (Salmo salar)
The conditions experienced by incubating Atlantic salmon (Salmo salar) eggs are strongly influenced by hyporheic exchange. In some rivers, periods of intense groundwater upwelling can reduce oxygen levels in the incubation zone to 0% saturation. The present study investigated the effect of oxygen sags on the post-hatch fitness of Atlantic salmon. A laboratory experiment allowed fine-scale control of oxygen concentrations to replicate those induced by low oxygen groundwater in rivers. Extreme oxygen sags in the earlier stages of embryo development resulted in a developmental lag with alevin hatching later and at an underdeveloped state. At the latest stages of development, oxygen sags caused premature hatching of severely underdeveloped alevin. These findings combined with a review of the literature suggest post-hatch survival of embryos exposed to groundwater induced hypoxia will be lower due to predation and poor competitiveness.
1830-1840
Bloomer, Jack
95a226e6-9756-4288-9d26-381d4bfbc25e
Sear, David A.
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
Dutey-Magni, Peter
f2713e93-3179-4f7d-82cd-dcd415f1d06c
Kemp, Paul S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Bloomer, Jack
95a226e6-9756-4288-9d26-381d4bfbc25e
Sear, David A.
ccd892ab-a93d-4073-a11c-b8bca42ecfd3
Dutey-Magni, Peter
f2713e93-3179-4f7d-82cd-dcd415f1d06c
Kemp, Paul S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Bloomer, Jack, Sear, David A., Dutey-Magni, Peter and Kemp, Paul S.
(2016)
The effects of oxygen depletion due to upwelling groundwater on the post-hatch fitness of Atlantic salmon (Salmo salar).
Canadian Journal of Fisheries and Aquatic Sciences, 73 (12), .
(doi:10.1139/cjfas-2016-0189).
Abstract
The conditions experienced by incubating Atlantic salmon (Salmo salar) eggs are strongly influenced by hyporheic exchange. In some rivers, periods of intense groundwater upwelling can reduce oxygen levels in the incubation zone to 0% saturation. The present study investigated the effect of oxygen sags on the post-hatch fitness of Atlantic salmon. A laboratory experiment allowed fine-scale control of oxygen concentrations to replicate those induced by low oxygen groundwater in rivers. Extreme oxygen sags in the earlier stages of embryo development resulted in a developmental lag with alevin hatching later and at an underdeveloped state. At the latest stages of development, oxygen sags caused premature hatching of severely underdeveloped alevin. These findings combined with a review of the literature suggest post-hatch survival of embryos exposed to groundwater induced hypoxia will be lower due to predation and poor competitiveness.
Text
cjfas-2016-0189.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 17 May 2016
e-pub ahead of print date: 10 June 2016
Organisations:
Earth Surface Dynamics
Identifiers
Local EPrints ID: 398306
URI: http://eprints.soton.ac.uk/id/eprint/398306
ISSN: 0706-652X
PURE UUID: aef23679-31ca-4433-be63-734c3ac26dc1
Catalogue record
Date deposited: 22 Jul 2016 09:27
Last modified: 15 Mar 2024 03:21
Export record
Altmetrics
Contributors
Author:
Jack Bloomer
Author:
Peter Dutey-Magni
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics