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A review of factors influencing the availability of dissolved oxygen to incubating salmonid embryos

Greig, S.M., Sear, D.A. and Carling, P.A. (2007) A review of factors influencing the availability of dissolved oxygen to incubating salmonid embryos Hydrological Processes, 21, (3), pp. 323-334. (doi:10.1002/hyp.6188).

Record type: Article

Abstract

Previous investigations into factors influencing incubation success of salmonid progeny have largely been limited to the development of empirical relationships between characteristics of the incubation environment and survival to emergence. It is suggested that adopting a process-based approach to assessing incubation success aids identification of the precise causes of embryonic mortalities, and provides a robust framework for developing and implementing managerial responses. Identifying oxygen availability within the incubation environment as a limiting factor, a comprehensive review of trends in embryonic respiration, and processes influencing the flux of oxygenated water through gravel riverbeds is provided. The availability of oxygen to incubating salmonid embryos is dependent on the exchange of oxygenated water with the riverbed, and the ability of the riverbed gravel medium to transport this water at a rate and concentration appropriate to support embryonic respiratory requirements. Embryonic respiratory trends indicate that oxygen consumption varies with stage of development, ambient water temperature and oxygen availability. The flux of oxygenated water through the incubation environment is controlled by a complex interaction of intragravel and extragravel processes and factors. The processes driving the exchange of channel water with gravel riverbeds include bed topography, bed permeability, and surface roughness effects. The flux of oxygenated water through riverbed gravels is controlled by gravel permeability, coupling of surface–subsurface flow and oxygen demands imposed by materials infiltrating riverbed gravels. Temporally and spatially variable inputs of groundwater can also influence the oxygen concentration of interstitial water.

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More information

Published date: 30 January 2007
Keywords: salmonid survival, respiration, hyporheic, habitat quality

Identifiers

Local EPrints ID: 43712
URI: http://eprints.soton.ac.uk/id/eprint/43712
ISSN: 1099-1085
PURE UUID: a8a2e34d-e966-4c70-8c43-f4c10dfbf53c
ORCID for D.A. Sear: ORCID iD orcid.org/0000-0003-0191-6179

Catalogue record

Date deposited: 29 Jan 2007
Last modified: 17 Jul 2017 15:17

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Contributors

Author: S.M. Greig
Author: D.A. Sear ORCID iD
Author: P.A. Carling

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