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Markers of Hypoxic Stress in Fishes of the Kissimmee River
Title
Markers of Hypoxic Stress in Fishes of the Kissimmee River.
Creator
Dirk, Lynda J., Milton, Sarah L., Florida Atlantic University
Abstract/Description
The channelized Kissimmee River experiences seasonally low dissolved oxygen levels which have changed the ecosystem to favor air-breathing species, while gamefish populations have declined greatly. In 2001 , the central portion of the river (Pool C) was physically restored. To evaluate the usefulness of various stress markers and assess the success of the partial restoration, the stress responses were analyzed (brain monoamines, heat shock proteins, and plasma cortisol) of air-breathing fish ...
Show moreThe channelized Kissimmee River experiences seasonally low dissolved oxygen levels which have changed the ecosystem to favor air-breathing species, while gamefish populations have declined greatly. In 2001 , the central portion of the river (Pool C) was physically restored. To evaluate the usefulness of various stress markers and assess the success of the partial restoration, the stress responses were analyzed (brain monoamines, heat shock proteins, and plasma cortisol) of air-breathing fish (bowfin, Florida gar), versus gamefish (largemouth bass and bluegill sunfish). Fish were collected from hypoxic and normoxic water at three sites in the Kissimmee River. Statistical analysis (MANOV A) showed overall significantly higher stress response in hypoxic gamefish than those in normoxia, with higher hsp72 levels, DOPAC, and Dopamine turnover (DOPAC:DA). Hsp60 and cortisol was significantly higher only in hypoxic bass while serotonin and 5-HIAA were significantly higher in hypoxic bluegill sunfish. Air-breathers did not show higher stress levels during hypoxia.
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Date Issued
2006
PURL
http://purl.flvc.org/fau/fd/FA00000747
Subject Headings
Kissimmee River (Fla )--Ecology, Restoration ecology--Florida--Kissimmee River Watershed, Adaptation (Biology), Fishes--Effect of stress on
Format
Document (PDF)