Premium
Evaluation of a Method for Measuring Intragravel Dissolved Oxygen Concentrations and Survival to Emergence in Shore‐Spawned Salmonids
Author(s) -
Jeric Randall J.,
Modde Timothy,
Godfrey Jeff M.
Publication year - 1995
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1995)015<0185:eoamfm>2.3.co;2
Subject(s) - incubation , oncorhynchus , environmental science , fishery , shore , substrate (aquarium) , incubation period , ecology , biology , environmental chemistry , fish <actinopterygii> , chemistry , biochemistry
We describe an incubation basket and a modified intragravel water sampling device used to quantify salmonid survival to emergence relative to dissolved oxygen (DO) concentrations in deep lacustrine habitats. Incubation baskets containing viable eggs from kokanees Oncorhynchus nerka and a shale substrate were set by divers in 2–20‐m‐deep spawning habitat in Flaming Gorge Reservoir, Utah–Wyoming. Water drawn into a syringe from an intragravel pipe buried near each incubation basket was used to determine intragravel DO concentrations throughout the incubation period. A trap on each incubation basket captured emergent fry in a holding bag. The bags were exchanged weekly to determine survival to emergence and time of emergence. Water in control baskets without eggs did not have significantly greater DO concentrations than adjacent water.