Document Detail

Exposure of reproductively maturing rainbow trout to a New Zealand pulp and paper mill effluent.
MedLine Citation:
PMID:  11800552     Owner:  NLM     Status:  MEDLINE    
Long-term studies on the reproductive fitness of fish under controlled exposure conditions are necessary to address some of the controversy surrounding the field-based studies of pulp and paper effluent effects. This study undertook effluent exposures of 2+ age rainbow trout that were approximately halfway through gonadal growth. Trout were exposed to a mixed thermomechanical/bleached kraft effluent in 12,000-L flow-through exposure tanks at an environmental research facility located at a pulp and paper mill in Kawerau, New Zealand. Trout were exposed to either upstream river water or 10% effluent in upstream river water and were maintained at a ration of 0.7% of body wet weight during the experiment. Results of the 2-month study indicated that trout survival was not significantly different between effluent-exposed tanks and reference tanks. There was extensive growth during the exposure but no differences were found due to effluent exposure. Gonadal development was not significantly different between treatments. Steroid hormone concentrations in males and females were not affected by effluent exposure. The effluent showed no potential to be estrogenic as indicated by a lack of vitellogenin induction in male trout. Other physiological indicators of energy storage and utilization also showed no significant differences. Modest induction of hepatic 7-ethoxyresorufin-O-deethylase (2.5-fold) was the only detectable biological effect of the exposure. Biliary concentration of effluent-related compounds were typical of pulp mill effluent exposure and further suggested that the source of phytosterols was in fact dietary and not effluent-derived.
M R van den Heuvel; R J Ellis; L A Tremblay; T R Stuthridge
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  51     ISSN:  0147-6513     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  2002 Jan 
Date Detail:
Created Date:  2002-01-21     Completed Date:  2002-02-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  United States    
Other Details:
Languages:  eng     Pagination:  65-75     Citation Subset:  IM    
Forest Research, Rotorua, New Zealand.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cytochrome P-450 CYP1A1 / metabolism
Environmental Exposure*
Gonadal Steroid Hormones / analysis
Gonads / drug effects,  growth & development
Industrial Waste / adverse effects*
Liver / chemistry
Oncorhynchus mykiss / physiology*
Population Dynamics
Reproduction / drug effects*
Survival Analysis
Water Pollutants, Chemical / adverse effects*
Reg. No./Substance:
0/Gonadal Steroid Hormones; 0/Industrial Waste; 0/Water Pollutants, Chemical; EC P-450 CYP1A1

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Meconium: a matrix reflecting potential fetal exposure to organochlorine pesticides and its metaboli...
Next Document:  Role of the DNA repair nucleases Rad13, Rad2 and Uve1 of Schizosaccharomyces pombe in mismatch corre...