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Title: Etiology of gas bubble disease

Gas bubble disease is a noninfectious, physically induced process caused by uncompensated hyperbaric pressure of total dissolved gases. When pressure compensation is inadequate, dissolved gases may form emboli (in blood) and emphysema (in tissues). The resulting abnormal physical presence of gases can block blood vessels (hemostasis) or tear tissues, and may result in death. Population mortality is generally skewed, in that the median time to death occurs well before the average time to death. Judged from mortality curves, three stages occur in gas bubble disease: (1) a period of gas pressure equilibrium, nonlethal cavitation, and increasing morbidity; (2) a period of rapid and heavy mortality; and (3) a period of protracted survival, despite lesions, and dysfunction that eventually terminates in total mortality. Safe limits for gas supersaturation depend on species tolerance and on factors that differ among hatcheries and rivers, between continuous and intermittent exposures, and across ranges of temperature and salinity.
Authors:
Publication Date:
OSTI Identifier:
6642479
Resource Type:
Journal Article
Resource Relation:
Journal Name: Trans. Am. Fish. Soc.; (United States); Journal Volume: 109:6
Research Org:
Fish and Wildlife Service, Seattle, WA
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 59 BASIC BIOLOGICAL SCIENCES; FISHES; SENSITIVITY; GAS BUBBLE DISEASE; ETIOLOGY; AIR; AQUATIC ECOSYSTEMS; ATMOSPHERIC PRESSURE; BIOLOGICAL EFFECTS; EMBOLI; EMPHYSEMA; FRESH WATER; MORTALITY; POPULATIONS; SOLUBILITY; SUPERSATURATION; SURVIVAL CURVES; TOLERANCE; ANIMALS; AQUATIC ORGANISMS; DISEASES; ECOSYSTEMS; FLUIDS; GASES; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; RESPIRATORY SYSTEM DISEASES; SATURATION; VASCULAR DISEASES; VERTEBRATES; WATER 560204* -- Thermal Effects-- Invertebrates-- (-1987); 550900 -- Pathology; 560400 -- Other Environmental Pollutant Effects