Acute cardio-respiratory responses of spangled perch, leiopotherapon unicolor (Gunther 1859), to sublethal concentrations of zinc, temephos and 2, 4-d

Gehrke P.C. (1988) Acute cardio-respiratory responses of spangled perch, leiopotherapon unicolor (Gunther 1859), to sublethal concentrations of zinc, temephos and 2, 4-d. Marine and Freshwater Research, 39 6: 767-774. doi:10.1071/MF9880767


Author Gehrke P.C.
Title Acute cardio-respiratory responses of spangled perch, leiopotherapon unicolor (Gunther 1859), to sublethal concentrations of zinc, temephos and 2, 4-d
Journal name Marine and Freshwater Research   Check publisher's open access policy
ISSN 1323-1650
Publication date 1988-01-01
Sub-type Article (original research)
DOI 10.1071/MF9880767
Volume 39
Issue 6
Start page 767
End page 774
Total pages 8
Subject 1104 Complementary and Alternative Medicine
1105 Dentistry
2303 Ecology
1910 Oceanography
2300 Environmental Science
1900 Earth and Planetary Sciences
Abstract Spangled perch, Leiopotherapon unicolor, were exposed to concentrations of 5.0, 10 or 20 mg 1-1zinc, 0.1, 1.0 or 10 mg 1-1temephos or 0.1, 1.0 or 10 mg 1-12, 4-D at 25ºC for 2 h, during which time ventilation rate, heart rate and oxygen consumption were continuously monitored. Fish exposed to 10 and 20 mg 1-1zinc demonstrated a significant increase in ventilation rate; those exposed to 20 mg 1-1also developed a significant bradycardia. Exposure to 10 mg 1-1temephos caused an immediate reduction in ventilation rate and oxygen consumption, and also reduced heart rate during the second hour of exposure. Fish exposed to 10 mg 1-1temephos died within 12 h. Responses of fish to 2, 4-D gave no indication of toxic effects on the cardio-respiratory system. Cardio-respiratory responses to zinc are attributed to damage caused to the gill epithelium, which results in impaired gas exchange and lowered oxygen tension in arterial blood. Effects of exposure to temephos correspond to cholinesterase inhibition in nerves supplying the respiratory musculature and the heart.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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