Effects of dewatering on chinook salmon redds: tolerance of four development phases to one-time dewatering

Journal Article · Sat Jan 01 04:00:00 EST 1983 · North Am. J. Fish. Manage.; (United States)

DOI:https://doi.org/10.1577/1548-8659(1983)3<373:EODOCS>2.0.CO;2· OSTI ID:5909408

Becker, C D; Neitzel, D A; Abernethy, C S

Four intergravel development phases of chinook salmon Oncorhynchus tshawytscha were experimentally dewatered in artificial redds. The redds consisted of aquaria filled with a gravel mix and supplied with 4 liters of water per minute at 10 C. Cleavage eggs and embryos (the egg phases) and eleutheroembryos and pre-emergent alevins (the alevin phases) were each dewatered once for a continuous period. Egg phases were considerably more tolerant than alevin phases. Cleavage eggs tolerated one-time dewaterings up to 12 consecutive days (98% survival), the maximum exposure period. Embryos had similar tolerance when dewatered 12 consecutive days (92% survival), but survival declined to 64% and 53% when embryos were dewatered 16 and 20 consecutive days, respectively. Loss of embryos after the longer dewatering was associated with premature hatch. In contrast, eleutheroembryos tolerated only a 6-hour dewatering period (96% survival) and underwent high mortality when dewatered 48 consecutive hours. Pre-emergent alevins underwent near total mortality when dewatered 6 consecutive hours. Loss of alevin phases was associated with development of functional gill structures. 23 references, 3 figures.

• Research Organization: Pacific Northwest Lab., Richland, WA
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5909408
• Journal Information: North Am. J. Fish. Manage.; (United States), Journal Name: North Am. J. Fish. Manage.; (United States) Vol. 3; ISSN NAJMD
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
130600* -- Hydro Energy-- Environmental Aspects
ANADROMOUS FISHES
ANIMALS
AQUATIC ORGANISMS
BIOLOGICAL EFFECTS
COMPARATIVE EVALUATIONS
DATA
DEATH
DEHYDRATION
EGGS
EMBRYOS
EXPERIMENTAL DATA
FISHES
INFORMATION
LIFE CYCLE
NUMERICAL DATA
ONTOGENESIS
SALMON
TOLERANCE
VARIATIONS
VERTEBRATES