Effects of increasing concentrations of fine suspended sediment on the survival, growth, condition factor and gill condition of artificially reared juveniles of Oncorhynchus masou , Salvelinus leucomaenis and Plecoglossus altivelis

2019 ◽  
Vol 51 (3) ◽  
pp. 972-981
Author(s):  
Keishi Matsuda
Keyword(s):  
Suspended Sediment ◽  
Growth Condition ◽  
Condition Factor ◽  
Oncorhynchus Masou ◽  
Plecoglossus Altivelis ◽  
Salvelinus Leucomaenis ◽  
Fine Suspended Sediment

scholarly journals Numerical modelling of hydro-morphological processes dominated by fine suspended sediment in a stormwater pond

2018 ◽  
Vol 556 ◽  
pp. 87-99 ◽  
Author(s):  
Mingfu Guan ◽  
Sangaralingam Ahilan ◽  
Dapeng Yu ◽  
Yong Peng ◽  
Nigel Wright
Keyword(s):  
Numerical Modelling ◽  
Suspended Sediment ◽  
Stormwater Pond ◽  
Morphological Processes ◽  
Fine Suspended Sediment

River loggers - a new tool to monitor riverine suspended particle fluxes

2001 ◽  
Vol 43 (9) ◽  
pp. 115-120 ◽  
Author(s):  
A. W. Mitchell ◽  
M. J. Furnas
Keyword(s):  
Suspended Sediment ◽  
Suspended Particle ◽  
Sediment Concentration ◽  
Wet Season ◽  
Overlying Water ◽  
Optical Surfaces ◽  
Sufficient Power ◽  
Suspended Sediment Concentrations ◽  
Fine Suspended Sediment

The Australian Institute of Marine Science (AIMS) has developed an in situ digital turbidity logger (AIMS River Logger) to record time series of fine suspended sediment concentrations in North Queensland rivers. The loggers use dual LED transmissometers (15 and 85 mm pathlength) to measure in situ turbidity associated with the range of suspended sediment concentrations (0-5 g L-1) encountered in regional rivers. A system of wiper brushes clean the optical surfaces prior to instrument readings. Overlying water depth and temperature are concurrently recorded. Internal batteries provide sufficient power for unattended deployments of 6+ months with readings taken at 30 minute intervals. Records of suspended sediment concentrations in the lower Tully River over three wet seasons (1996, 1997, 2000) are shown in relation to concurrent river discharge. Peaks in suspended sediment concentration coincide with discharge events. During each event, peak sediment concentrations typically occur during the rising stage of the hydrograph, then decline rapidly prior to significant falls in water level. Derived suspended loads during discharge events are generally proportional to the size of the event, though higher responses are recorded during the initial flood event of each wet season.

Relative Contributions of Dietary and Waterborne Copper to Tissue Copper Burdens and Waterborne-Copper Tolerance in Rainbow Trout (Oncorhynchus mykiss)

1993 ◽  
Vol 50 (8) ◽  
pp. 1683-1689 ◽  
Author(s):  
P. A. Miller ◽  
R. P. Lanno ◽  
M. E. McMaster ◽  
D. G. Dixon
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Condition ◽  
Condition Factor ◽  
Copper Tolerance ◽  
Food Conversion ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Lethal Level ◽  
Cu Tolerance ◽  
Food Conversion Efficiency

In a 42-d study, rainbow trout (Oncorhynchus mykiss) were fed a diet containing either 13 or 684 mg Cu∙kg−1 and simultaneously exposed to waterborne-Cu concentrations of 5, 32, 55, or 106 μg∙L−1 (low-Cu diet) or 13, 38, 62, or 127 μg∙L−1 (high-Cu diet). There were no significant effects on mortality, growth, condition factor, or food conversion efficiency. Elevated dietary Cu increased Cu concentrations in liver (p < 0.001), kidney (p < 0.001), gill (p = 0.005), and digesta (p < 0.001). Increasing waterborne-Cu concentrations elevated Cu concentrations in liver (p = 0.018) and kidney (p = 0.002) but not in gill (p = 0.930) or digesta (p = 0.519). Waterborne-Cu exposure increased Zn concentrations in liver (p = 0.025) but decreased those in kidney (p = 0.045). For fish on the high-Cu diet, diet provided 99, 85, and 63% of the Cu in the liver for the 38, 62, and 127 μg∙L−1 waterborne-Cu treatments, respectively. Based on Cu tolerance (incipient lethal level for Cu), dietary and waterborne Cu partitioned into functionally different compartments. Although both waterborne-Cu (p < 0.00001) and dietary-Cu (p = 0.019) preexposure increased Cu tolerance, waterborne Cu had a much greater impact.

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