Premium
Acute effects of chlorinated resin acid exposure on juvenile rainbow trout, Oncorhynchus mykiss
Author(s) -
Kennedy Christopher J.,
Sweeting Ruston M.,
Farrell Anthony P.,
McKeown Brian A.,
Johansen Jeffrey A.
Publication year - 1995
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620140608
Subject(s) - rainbow trout , juvenile , zoology , trout , hematocrit , chemistry , biology , aeromonas salmonicida , fish <actinopterygii> , fishery , endocrinology , ecology
The effects of an acute exposure to either 14–monochlorodehydroabietic acid (MCDHAA) or 12,14–dichlorodehydro‐abietic acid (DCDHAA) were examined in juvenile rainbow trout, Oncorhynchus mykiss. The experimentally determined 96–h LC50 values (and their 95% confidence limits) were 1.03 (0.72, 1.48) and 0.91 (0.70, 1.21) mg/L, for MCDHAA and DCDHAA, respectively. To measure effects on several biochemical parameters, swimming performance, and disease resistance, juvenile trout were exposed for 24 h to sublethal concentrations of one or the other resin acid in an intermittent‐flow respirometer. Hematocrit, plasma lactate, and liver protein were significantly affected by exposure to the highest dose (80% of the 96‐h LC50 value) of either of the resin acids. Plasma cortisol levels were 14‐and 3‐fold higher than were controls. Resistance to infection by Aeromonas salmonicida was significantly reduced; the cumulative percent mortalities due to furunculosis in fish exposed to MCDHAA or DCDHAA reached 20 and 26%, respectively. Swimming performance, measured as critical swimming speed (mean values 6.32 ± 0.20 and 5.93 ± 0.15 body lengths per second for MCDHAA and DCDHAA, respectively), was not significantly affected by resin acid exposure.