Journal
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
Volume 140, Issue 1, Pages 97-102Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cca.2005.01.011
Keywords
European eel; Anguilla anguilla; virus; simulated migration; EVEX; blood chemistry; lactate dehydrogenase; total protein; aspartate aminotransferase
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We show that European eels infected with the rhabdovirus EVEX (Eel Virus European X) virus, developed hemorrhage and anemia during simulated migration in large swim tunnels, and died after 1000-1500 km. In contrast, virus-negative animals swam 5500 km, the estimated distance to the spawning ground of the European eel in the Sargasso Sea. Virus-positive eels showed a decline in hematocrit, which was related to the swim distance. Virus-negative eels showed a slightly, increased hematocrit. Observed changes in plasma lactate dehydrogenase (LDH), total protein and aspartate aminotransferase (AAT) are indicative of a serious viral infection. Based on these observations, we conclude that eel virus infections may adversely affect the spawning migration of eels, and could be a contributing factor to the worldwide decline of eel. (c) 2005 Elsevier Inc. All rights reserved.
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