Tolerance of eggs, embryos, and alevins of chinook salmon to temperature changes and reduced humidity in dewatered redds

Journal Article · Fri Mar 01 00:00:00 EST 1985 · Trans. Am. Fish. Soc.; (United States)

DOI:https://doi.org/10.1577/1548-8659(1985)114<267:TOEEAA>2.0.CO;2· OSTI ID:6254168

Neitzel, D A; Becker, C D

Changes in temperature and relative humidity can occur in gravel during dewatering of salmonid redds. Four intergravel development phases of chinook salmon Oncorhynchus tshawytscha were exposed to increased or decreased temperatures, and one phase was subjected to reduced relative humidity to define tolerance limits. Abrupt increases in temperature from 10C to above 22C for 1-8 h reduced survival of cleavage eggs. Embryos survived 8-h exposures to 25C and 2-h exposures to 26.5C. Eleutheroembryo and pre-emergent alevins tolerated 4-h exposures to 23.5C and 1-h exposures to 25.0C. Decreases in temperatures from 10.0C to near freezing (about 0.0C) did not reduce survival of eggs, embryos, or alevins. Reduced relative humidity adversely affected survival of embryos. Ninety-eight percent of dewatered embryos exposed to 100% relative humidity for up to 24 hours survived. Embryo survival at 90% relative humidity was 0%, 55%, and 100% for exposure periods of 24, 8, and 4 h, respectively. Control survival was greater than 97%. 19 references, 4 tables.

• Research Organization: Pacific Northwest Lab., Richland, WA
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6254168
• Journal Information: Trans. Am. Fish. Soc.; (United States), Vol. 114:2
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
EGGS
TEMPERATURE EFFECTS
EMBRYOS
HUMIDITY
BIOLOGICAL EFFECTS
SALMON
EXPERIMENTAL DATA
SURVIVAL TIME
TOLERANCE
ANADROMOUS FISHES
ANIMALS
AQUATIC ORGANISMS
DATA
FISHES
INFORMATION
NUMERICAL DATA
VERTEBRATES
560205* - Thermal Effects- Vertebrates- (-1987)