An analysis of relationships between some environmental variables and river herring abundance in the Chowan River, North Carolina / by Milton Bennett Wynne, Jr.
| Author/creator | Wynne, M. Bennett, 1956- author. |
| Other author | O'Rear, Charles W., degree supervisor. |
| Other author | East Carolina University. Department of Biology. |
| Format | Theses and dissertations |
| Production | 1987. |
| Description | iii, 39 leaves : illustrations, 1 map ; 28 cm |
| Supplemental Content | Access via ScholarShip |
| Subjects |
| Summary | Multiple correlation analysis was used in an effort to identify major environmental factors that corresponded with abundance of river nerring. Environmental variables temperature, precipitation, flow, harvested cropland acres, agricultural fertilizer sold, pulp mill effluent discharge and fishing effort were correlated with commercial catch data (estimates of abundance) over long term (annually for twenty years) and short term (monthly for five years) periods of time. The strongest relationship found was the negative correlation between harvested cropland acres and river herring catch (R square = .724, total R square = .764). Increased agricultural fertilizer sales in counties bordering the Chowan appeared to be negatively correlated with the survival of young herring. Indications were that pulp mill effluent favored survival of young herring, although this apparent benefit did not correlate with unlagged total catch rates. Large departures from normal spring temperatures were also implicated with declines in abundance. Correlations of flow and precipitation with river herring abundance conflicted and remain unresolved. |
| General note | "Presented to the faculty of the Department of Biology ... in partial fulfillment of the requirements for the degree Master of Science." |
| General note | Advisor: Charles W. O'Rear |
| Dissertation note | M.S. East Carolina University 1987 |
| Bibliography note | Includes bibliographical references (leaves 36-39). |
| Genre/form | dissertations. |
| Genre/form | Academic theses. |
| Genre/form | Academic theses. |
| Genre/form | Thèses et écrits académiques. |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Joyner | University Archives | ASK AT SPECIAL COLLECTIONS DESK | ✔ Available | Request Material |
| Joyner | Microforms | MICROFILM* | ✔ Available | |
| Joyner | General Stacks | QL638.C64 W96X 1987 | ✔ Available | Place Hold |
| Electronic Resources | Access Content Online | ✔ Available |