| Main Title |
Effects of Logging on Growth of Juvenile Coho Salmon. |
| Author |
Iwanag, Paul M. ;
Hal, James D. ;
|
| CORP Author |
Oregon State Univ., Corvallis. Dept. of Fisheries and Wildlife. |
| Year Published |
1973 |
| Report Number |
EPA-18050-FKT; 11433,; R3-73-006 |
| Stock Number |
PB-221 541 |
| Additional Subjects |
( Salmon ;
Growth) ;
( Lumbering ;
Salmon) ;
Thermal stresses ;
Watersheds ;
Temperature measurement ;
Cutting ;
Streams ;
Thermal shock ;
Feeding stuffs ;
Abundance ;
Oregon ;
Coho salmon
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-221 541 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
43p |
| Abstract |
The objective was to study the effects of increased water temperature characteristic of clearcut watersheds of Pacific coastal streams upon the growth rate of juvenile coho salmon. The natural temperature fluctuations of the stream were used in the study of growth of underyearling fish held in aquariums and fed at various consumption levels. Juvenile coho fed in the control stream grew somewhat faster than did those that experienced the warmer temperatures of the clearcut stream. This was particularly true at low levels of consumption. Growth rates of juvenile coho salmon in the wild state were found to be slightly higher in the clearcut stream as compared to the unlogged stream. This difference from the experimental results may have been due to a change in availability and abundance of food. There was a marked decrease in the cutthroat trout population in the clearcut stream, which may have reduced competition for food. There was no apparent influence of infestation by salmon poisoning fluke on the condition of the juvenile coho in the clearcut stream. |
| Supplementary Notes |
Paper copy available from GPO $0.75 as stock no. EPI.23:73-006. |
| NTIS Title Notes |
Ecological research series. |
| PUB Date Free Form |
Apr 73, |
| Category Codes |
6C; 6F; 52G |
| NTIS Prices |
PC-GPO/MF A01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
326564123 |
| Origin |
NTIS |
| Type |
CAT |
