Catalogo Articoli (Spogli Riviste)


Effects of dissolved carbon dioxide on the physiology and behavior of fishin artificial streams
Ross, RM; Krise, WF; Redell, LA; Bennett, RM;
US Geol Survey, No Appalachian Res Lab, Wellsboro, PA 16901 USA US Geol Survey Wellsboro PA USA 16901 an Res Lab, Wellsboro, PA 16901 USA
Titolo Testata:
fascicolo: 1, volume: 16, anno: 2001,
pagine: 84 - 95
acid mine drainage; blacknose dace; blood glucose; branchial ventilation; brook trout; feeding behavior; hematocrit; slimy sculpin; swimming behavior;
Tipo documento:
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Indirizzi per estratti:
Indirizzo: Ross, RM US Geol Survey, No Appalachian Res Lab, Rural Route 4,Box 63, Wellsboro, PA 16901 USA US Geol Survey Rural Route 4,Box 63 Wellsboro PA USA 16901 01 USA
R.M. Ross et al., "Effects of dissolved carbon dioxide on the physiology and behavior of fishin artificial streams", ENVIRON TOX, 16(1), 2001, pp. 84-95


A new technology for treating waters contaminated with acid mine drainage involves the dissolution of limestone particles using carbon dioxide at pressures above ambient. Because of the fish health risks associated with episodes of high carbon dioxide levels in treated waters, we subjected three species of fish, brook trout (Salvelinus fontinalis), slimy sculpin (Cottus cognatus), and blacknose dace (Rhinichthys atratulus), to 24 h exposures of elevated dissolved carbon dioxide (CO2) at three levels, ranging from 1.0 (low) to 6.3 (high)%, under laboratory conditions. We measured blood physiological variables as well as behavior, including feeding responses, before, during, and after exposure. Physiological responses differed by species, but all species had elevated hematocrits after 1 h of exposure. Brook trout hematocrits were higher at medium and high levels of CO2 than in a control group (0.0% CO2) after 24 h of exposure. Slimy sculpin hematocrits were higher in medium- and high-level exposure groups than in controls after 1 h, but not after 24 h, of exposure. Blacknose dace hematocrits were higher in all three exposure groups than in controls after 1 h but only in medium-levelexposure groups after 24 h. Brook trout plasma glucose was significantly higher in medium- and high-level exposure groups after 1 h, and in the high-level group after 24 h, than in controls. Slimy sculpin plasma glucose was not significantly different in elevated CO2 exposure groups from that of controls throughout exposure. Branchial ventilation was significantly greaterin all species at elevated CO2 during exposure, indicating stress; however, no difference was observed between treatment and control groups of blacknose dace after 24 h, indicating acclimation. Pectoral fin beats and cough rates were not consistently related to CO2 exposure throughout the study. Brook trout had the longest lasting reaction to stress at lower levels of CO2among the three species tested. Many of the 11 observed behavioral variables, related to swimming, feeding, social, and illness factors, were affected by elevations of dissolved CO2. Two to seven behavioral variables (18-64%of those measured) were affected by treatment level of dissolved CO2 with a trend by species for the number of variables affected: brook trout > blacknose dace > slimy sculpin. However, behavioral sensitivity to treatment level was greatest in blacknose dace. Recovery to pre-treatment activity rates for most behavior patterns (including feeding) was observed 24 h after cessation of exposure in all three species. Recovery was independent of treatment level, was most rapid in blacknose dace, and was slowest in brook trout. Overall, slimy sculpin was least affected behaviorally by elevated CO2. Although all three species showed stress response and changes in behavior at moderate levels of CO2 (greater than or equal to 2%), brook trout and blacknose dace showed evidence of ability to avoid harmful CO2 levels by swimming out of affected waters, whereas the slimy sculpin showed minimal behavioral changes despite remaining in place during exposure. Thus,predation risk and other sources of mortality seem minimal in the event of technologicalmalfunction at a stream treatment site involving the use of CO2 under pressure. (C) 2001 by John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 22:10:30