Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill
Creel surveys were performed over a three week period in late spring, 2011, in the Lafourche and Calcasieu area estuaries of the Louisiana Gulf Coast. Weights and lengths were measured for black drum (Pogonias cromis), red drum (Sciaenops ocellatus), and spotted seatrout (Cynoscion nebulosus), and r...
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ftdtic:ADA564207 2023-05-15T18:06:00+02:00 Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill Courtney, Joshua Klinkmann, Taylor Courtney, Amy Torano, Joseph Courtney, Michael BTG RESEARCH COLORADO SPRINGS CO 2012-02-01 text/html http://www.dtic.mil/docs/citations/ADA564207 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA564207 en eng http://www.dtic.mil/docs/citations/ADA564207 Approved for public release; distribution is unlimited. DTIC Ecology Biological Oceanography Noise Pollution and Control *ECOSYSTEMS *FISHES *FOOD CHAINS *OIL SPILLS BODY WEIGHT GROWTH(PHYSIOLOGY) MEXICO GULF PHYSIOLOGICAL EFFECTS SURVEYS *BIOINDICATORS CONDITION INDEX RELATIVE CONDITION FACTOR DEEPWATER HORIZON OIL SPILL CREEL SURVEYS Text 2012 ftdtic 2016-02-24T08:25:31Z Creel surveys were performed over a three week period in late spring, 2011, in the Lafourche and Calcasieu area estuaries of the Louisiana Gulf Coast. Weights and lengths were measured for black drum (Pogonias cromis), red drum (Sciaenops ocellatus), and spotted seatrout (Cynoscion nebulosus), and relative condition factors were calculated relative to expected weights from the long term (5 year) Louisiana data for each species. A normal relative condition factor is 1.00. The mean relative condition factors in the Lafourche area were black drum, 0.955 +/- 0.020; red drum, 0.955 +/- 0.011; spotted seatrout, 0.994 +/- 0.009. In the Calcasieu area, the mean relative condition factors were black drum, 0.934 +/- 0.017; red drum, 0.965 +/- 0.014; spotted seatrout, 0.971 +/- 0.010. Results suggest that the abundance of primary food sources for black drum and red drum in Lafourche, including oysters and crab, were likely affected by the oil spill and continued to be reduced one year later. Increased harvest of oysters and blue crab in the Calcasieu area (in part to make up for the ban in most of Louisiana) resulted in less food for the black drum and red drum there, also. Spotted seatrout eat mainly shrimp and small fish and showed no significant reduction in relative condition factor in Lafourche and a slight reduction in Calcasieu one year after the oil spill. This work was supported by BTG Research. Prepared in collaboration with the U.S. Air Force Academy. The original document contains color images. Text Red drum Sciaenops ocellatus Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Ecology Biological Oceanography Noise Pollution and Control *ECOSYSTEMS *FISHES *FOOD CHAINS *OIL SPILLS BODY WEIGHT GROWTH(PHYSIOLOGY) MEXICO GULF PHYSIOLOGICAL EFFECTS SURVEYS *BIOINDICATORS CONDITION INDEX RELATIVE CONDITION FACTOR DEEPWATER HORIZON OIL SPILL CREEL SURVEYS |
spellingShingle |
Ecology Biological Oceanography Noise Pollution and Control *ECOSYSTEMS *FISHES *FOOD CHAINS *OIL SPILLS BODY WEIGHT GROWTH(PHYSIOLOGY) MEXICO GULF PHYSIOLOGICAL EFFECTS SURVEYS *BIOINDICATORS CONDITION INDEX RELATIVE CONDITION FACTOR DEEPWATER HORIZON OIL SPILL CREEL SURVEYS Courtney, Joshua Klinkmann, Taylor Courtney, Amy Torano, Joseph Courtney, Michael Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
topic_facet |
Ecology Biological Oceanography Noise Pollution and Control *ECOSYSTEMS *FISHES *FOOD CHAINS *OIL SPILLS BODY WEIGHT GROWTH(PHYSIOLOGY) MEXICO GULF PHYSIOLOGICAL EFFECTS SURVEYS *BIOINDICATORS CONDITION INDEX RELATIVE CONDITION FACTOR DEEPWATER HORIZON OIL SPILL CREEL SURVEYS |
description |
Creel surveys were performed over a three week period in late spring, 2011, in the Lafourche and Calcasieu area estuaries of the Louisiana Gulf Coast. Weights and lengths were measured for black drum (Pogonias cromis), red drum (Sciaenops ocellatus), and spotted seatrout (Cynoscion nebulosus), and relative condition factors were calculated relative to expected weights from the long term (5 year) Louisiana data for each species. A normal relative condition factor is 1.00. The mean relative condition factors in the Lafourche area were black drum, 0.955 +/- 0.020; red drum, 0.955 +/- 0.011; spotted seatrout, 0.994 +/- 0.009. In the Calcasieu area, the mean relative condition factors were black drum, 0.934 +/- 0.017; red drum, 0.965 +/- 0.014; spotted seatrout, 0.971 +/- 0.010. Results suggest that the abundance of primary food sources for black drum and red drum in Lafourche, including oysters and crab, were likely affected by the oil spill and continued to be reduced one year later. Increased harvest of oysters and blue crab in the Calcasieu area (in part to make up for the ban in most of Louisiana) resulted in less food for the black drum and red drum there, also. Spotted seatrout eat mainly shrimp and small fish and showed no significant reduction in relative condition factor in Lafourche and a slight reduction in Calcasieu one year after the oil spill. This work was supported by BTG Research. Prepared in collaboration with the U.S. Air Force Academy. The original document contains color images. |
author2 |
BTG RESEARCH COLORADO SPRINGS CO |
format |
Text |
author |
Courtney, Joshua Klinkmann, Taylor Courtney, Amy Torano, Joseph Courtney, Michael |
author_facet |
Courtney, Joshua Klinkmann, Taylor Courtney, Amy Torano, Joseph Courtney, Michael |
author_sort |
Courtney, Joshua |
title |
Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
title_short |
Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
title_full |
Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
title_fullStr |
Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
title_full_unstemmed |
Relative Condition Factors of Fish as Bioindicators One Year after the Deepwater Horizon Oil Spill |
title_sort |
relative condition factors of fish as bioindicators one year after the deepwater horizon oil spill |
publishDate |
2012 |
url |
http://www.dtic.mil/docs/citations/ADA564207 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA564207 |
genre |
Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA564207 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766177562797539328 |