Photoperiodic acclimation and circadian variations in tolerance of juvenile rainbow trout (Salmo gairdneri) to zinc

Journal Article · Thu Nov 01 00:00:00 EST 1979 · Bull. Environ. Contam. Toxicol.; (United States)

DOI:https://doi.org/10.1007/BF01770002· OSTI ID:5175483

McLeay, D J; Munro, J R

The intent of this study was to determine if circadian variations occur in the tolerance of juvenile rainbow trout (Salmo gairdneri) to an acutely lethal concentration of zinc. Further, the influence of photoperiodic acclimation on this tolerance was examined since seasonal or photoperiodic acclimation may alter hormonal rhythms and toxic responses at a particular time of day, thus complexing the potential variations in acute lethal or sublethal aquatic toxicity data. Although SPIELER et al. (1977) noted that differing acclimation photoperiods did not shift the diel rhythm of tolerance of a fish species to formalin, ZITKO and CARSON (1977) recently reported seasonal variations in acute tolerance to zinc of juvenile salmonid fish held under constant temperature but ambient photoperiod conditions; and TERPIN et al. (1976) found changes in critical thermal maxima of fish due to photoperiodic acclimation. In mammals, shifts in photoperiod are known to alter circadian patterns of drug tolerance.

• Research Organization: B.C. Research, Vancouver
• OSTI ID: 5175483
• Journal Information: Bull. Environ. Contam. Toxicol.; (United States), Vol. 23:4/5
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ZINC
BIOLOGICAL EFFECTS
AQUATIC ECOSYSTEMS
BIOLOGICAL ADAPTATION
DAILY VARIATIONS
FISHES
PHOTOPERIOD
TOLERANCE
TROUT
ANIMALS
AQUATIC ORGANISMS
ECOSYSTEMS
ELEMENTS
METALS
VARIATIONS
VERTEBRATES
560305* - Chemicals Metabolism & Toxicology- Vertebrates- (-1987)