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035 a| (Sirsi) o47028791;

035 a| (OCoLC)47028791;

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049 a| EREE;

050 4 a| QL638.C3b| M34 2000;

100 1 a| McHenry, David G.,e| author.?| UNAUTHORIZED;

245 10 a| Health and condition of largemouth bass in the lower Roanoke River, North Carolina based on a fish health assessment index /c| by David Gregg McHenry.;

264 0 c| 2000.;

300 a| ix, 125 leaves :b| illustrations, maps ;c| 28 cm;

336 a| textb| txt2| rdacontent;

337 a| unmediatedb| n2| rdamedia;

338 a| volumeb| nc2| rdacarrier;

502 b| M.S.c| East Carolina Universityd| 2000;

500 a| Submitted to the faculty of the Department of Biology.;

500 a| Advisor: Charles W. O'Rear, Jr.;

520 3 a| A fish health assessment index (FHAI) was used to assess largemouth bass {Micropterus salmoides) health in the lower Roanoke River, North Carolina in 1998 and 1999. The index scores the health of fish based on an autopsy evaluation of their organs and tissues with higher scores indicating poorer health relative to lower scores. The objective was to determine if largemouth bass health and population characteristics differed between upstream non-tidal and downstream tide-influenced river regions due to changes in physical habitat and water quality. The FHAI indicated largemouth bass health was similar in upstream and downstream regions of the river, however seasonal differences in health scores were observed. In the summer of 1999, sustained drought and low river flow conditions allowed periodic brackish water with low dissolved oxygen to intrude from Albemarle Sound into normally fresh tidal regions of the river. Mean FHAI scores for all the repeated sites were 19, 24, and 33 in the fall, spring, and summer samples, respectively. The FHAI scores and relative weights of largemouth bass, which were low overall, showed a consistent spatial pattern of fish health. The hepatosomatic index varied according to the reproductive maturity of largemouth bass or suggested spatial differences in feeding or diet. Overall, the FHAI scores indicated that largemouth bass were relatively healthy and comparable to reference or average conditions observed in other river and lacustrine systems. Therefore, despite the extreme water quality conditions in the summer, the lower Roanoke River does not appear to have obvious habitat problems. However, largemouth bass in upstream regions of the river were less abundant and slower growing than fish from downstream regions, which suggests the downstream region of the river is more productive largemouth bass habitat.;

504 a| Includes bibliographical references (leaves 69-79).;

650 0 a| Largemouth bassx| Healthz| Roanoke River (Va. and N.C.)=| ^A124779;

651 0 a| Roanoke River (Va. and N.C.)=| ^A74309;

655 7 a| Academic theses.2| fast0| (OCoLC)fst01726453;

655 7 a| Academic theses.2| lcgft;

655 7 a| Thèses et écrits académiques.2| rvmgf0| (CaQQLa)RVMGF-000001173;

655 2 a| Academic Dissertation.0| (DNLM)D019478?| UNAUTHORIZED;

700 1 a| O'Rear, Charles W.,e| degree supervisor.1| https://id.oclc.org/worldcat/entity/E39PCjBhPwx9xxykVbQJ9qmHfm=| ^A80391;

710 2 a| East Carolina University.b| Department of Biology.=| ^A637467;

856 41 z| Access via ScholarShipu| http://hdl.handle.net/10342/12596;

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Health and condition of largemouth bass in the lower Roanoke River, North Carolina based on a fish health assessment index / by David Gregg McHenry.

Author/creator	McHenry, David G. author.
Other author	O'Rear, Charles W., degree supervisor.
Other author	East Carolina University. Department of Biology.
Format	Theses and dissertations
Production	2000.
Description	ix, 125 leaves : illustrations, maps ; 28 cm
Supplemental Content	Access via ScholarShip
Subjects	Largemouth bass--Health. --Roanoke River (Va. and N.C.). Roanoke River (Va. and N.C.)

Summary	A fish health assessment index (FHAI) was used to assess largemouth bass {Micropterus salmoides) health in the lower Roanoke River, North Carolina in 1998 and 1999. The index scores the health of fish based on an autopsy evaluation of their organs and tissues with higher scores indicating poorer health relative to lower scores. The objective was to determine if largemouth bass health and population characteristics differed between upstream non-tidal and downstream tide-influenced river regions due to changes in physical habitat and water quality. The FHAI indicated largemouth bass health was similar in upstream and downstream regions of the river, however seasonal differences in health scores were observed. In the summer of 1999, sustained drought and low river flow conditions allowed periodic brackish water with low dissolved oxygen to intrude from Albemarle Sound into normally fresh tidal regions of the river. Mean FHAI scores for all the repeated sites were 19, 24, and 33 in the fall, spring, and summer samples, respectively. The FHAI scores and relative weights of largemouth bass, which were low overall, showed a consistent spatial pattern of fish health. The hepatosomatic index varied according to the reproductive maturity of largemouth bass or suggested spatial differences in feeding or diet. Overall, the FHAI scores indicated that largemouth bass were relatively healthy and comparable to reference or average conditions observed in other river and lacustrine systems. Therefore, despite the extreme water quality conditions in the summer, the lower Roanoke River does not appear to have obvious habitat problems. However, largemouth bass in upstream regions of the river were less abundant and slower growing than fish from downstream regions, which suggests the downstream region of the river is more productive largemouth bass habitat.
General note	Submitted to the faculty of the Department of Biology.
General note	Advisor: Charles W. O'Rear, Jr.
Dissertation note	M.S. East Carolina University 2000
Bibliography note	Includes bibliographical references (leaves 69-79).
Genre/form	Academic theses.
Genre/form	Academic theses.
Genre/form	Thèses et écrits académiques.

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Health and condition of largemouth bass in the lower Roanoke River, North Carolina based on a fish health assessment index / by David Gregg McHenry.

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