Title

The Effect of Oil Exposure on the Tissues and Health Status of Gulf of Mexico Fishes

Advisor

Petrie-Hanson, Lora

Committee Member

Jack, Sherman W.

Committee Member

Johnson, Melanie E.

Date of Degree

1-1-2012

Original embargo terms

Worldwide

Document Type

Graduate Thesis - Open Access

Major

Veterinary Medical Science

Degree Name

Master of Science

College

College of Veterinary Medicine

Abstract

The Macondo 252 oil spill occurred on April 20, 2010 and persisted for 86 days. Oil spill exposed Gulf fish demonstrated reduced lymphocyte counts and increased ethoxyresorufin-O-deethylase (EROD) values. Alligator gar were exposed to 0, 0.5 and 4.0 g oil/L of tank water for 48 hours, then moved to oilree water for a 7 day recovery period. After forty-eight hours exposure, lymphocyte and hematopoietic precursor populations were significantly decreased in dose responsive by exposure to oil. Following a 7 day recovery period, lymphocyte and precursor cell numbers increased. After 48 hours exposure, tissue changes included hepatocellular vacuolization and necrosis, necrotizing pancreatitis, splenic congestion and epicarditis. This demonstrates that oil exposure negatively impacts immune cells and tissues in fish and increases their disease susceptibility. Prolonged oil exposure has the potential to dramatically impact the health status of fish populations.

URI

https://hdl.handle.net/11668/18946

Comments

Gulf of Mexico||Atractosteus Spatula||Effects of petroleum producson

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