Modifications of the reproductive period in mummichog (<i>Fundulus heteroclitus</i>) living downstream from a bleached kraft pulp mill in the Miramichi Estuary, New Brunswick, Canada

Leblanc, Judith; Couillard, Catherine M.; Brêthes, Jean-Claude

doi:10.1139/f97-159

Cited by 53 publications

(63 citation statements)

References 28 publications

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“…Many field studies suggest estrogenic effects on fish in polluted habitats, including reduced reproduction success (Petersen et al, 1997), reduced the levels of plasma estrogens in males (Johnson et al, 1988), and alternation in sex ratios (Lang et al, 1995). However, some reports showed anti-estrogenic activity on fish, for example masculination of fish (Leblac et al, 1997), reduced gonad growth (Sanstrom et al, 1997), disrupted steroid synthesis by the ovary and altered peripheral metabolism of steroids (Van der Kraak et al, 1992). In addition, M74 syndrome (environmentally related disease 1974) in Baltic salmon and the equivalent Early Mortality Syndrome (EMS) in salmonids of North American Great Lakes were observed in fry and embryo (AFS, 1996).…”

Section: Introductionmentioning

confidence: 99%

Acute and early life stage toxicity of industrial effluent on Japanese medaka (Oryzias latipes)

Zha¹,

Wang²

2006

Science of The Total Environment

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To develop the whole effluent toxicity testing methods (WET), embryo larval stage toxicity test using Japanese medaka (Oryzias latipes) was conducted to evaluate an effluent from a banknote printing plant (BPP). The method is based on acute toxicity using endpoint of 96-h larval morality and on chronic toxicity using endpoints such as the time to hatch, hatching success, deformity, growth rate, swim-up failure, accumulative mortality and sexual ratio. In test for 96-h larval mortality, LC50 (the concentration was lethal to 50% of newly hatching medaka larvae) was 72.9%. In chronic toxicity test, newly fertilized embryos (b 5-h old) were exposed to 1%, 6.25%, 12.5%, 25%, 50% effluent concentrations and to 200 Ag/l BPA in a 24-h static renewal system at 25 F 1 8C until 15 day post-hatch. The results showed that all chronic endpoints were significantly different from the control at 50% dilution ( p b 0.01). Embryos began to show lesions on 4th day at higher concentrations (12.5%, 25%, 50% BPP effluent concentrations). Treatment group of 25% dilution showed delayed time to hatch. A reduction in body weight was observed at 25% dilutions for males and females, respectively. Deformities were observed in newly hatched larvae at 25% and 50% BPP effluent concentrations. At 25% dilution, sex ratio of larvae was alternated and there was feminization phenomenon. We conclude that embryo larval stage test using medaka is feasible to evaluate both acute and chronic toxicities and potential endocrine disrupting activity of industrial effluents. D

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Section: Introductionmentioning

confidence: 99%

Acute and early life stage toxicity of industrial effluent on Japanese medaka (Oryzias latipes)

Zha¹,

Wang²

2006

Science of The Total Environment

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“…Mixed function oxidases (MFOS) involved with detoxification processes such as the activation of 7-ethoxyresorufin-O-deethylase (EROD) (Andersson et al, 1988;Mather-Mihaich and DiGiulio, 1991;Lindstro¨m-Seppa¨and Oikari, 1990;Gagne´and Blaise, 1993), the level of sexual hormones (Munkittrick et al, 1991;1992;Van Den Heuvel et al, 1995), and reproductive strategies (Leblanc et al, 1997) have all been demonstrated to be affected by bleached pulp discharges.…”

Section: Introductionmentioning

confidence: 99%

Phagocytic and Metabolic Activities of Macrophages from Mummichog Naturally Exposed to Pulp Mill Effluents in the Miramichi River

Fournier

Lacroix

Voccia

et al. 1998

Ecotoxicology and Environmental Safety

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“…As part of a multidisciplinary effort to contrast the environmental status of the two rivers, a series of coordinated ecotoxicological studies examined a wide range of endpoints in mummichog from two sites in each river, collecting information on levels of individual contaminants in fish tissues, reproductive parameters, measures of immune function, and genetic effects. Mummichog from the site nearest the BKM had elevated tissue levels of chlorophenolic comNatural and anthropogenic factors shape metazoan parasite community structure in mummichog (Fundulus heteroclitus) from two estuaries in New Brunswick, Canada Christopher A. Blanar 1 , David J. Marcogliese 1 and Catherine M. Couillard pounds, PCBs, DDT, and dibenzofurans; fish from this site also experienced a wide range of physiological disturbances, including signs of generalized stress, reproductive effects, altered immune function, and genetic effects (see Table 1; Couillard and Légaré 1994, Leblanc et al 1997, Fournier et al 1998, couillard et al 1999, couillard and Nellis 1999, Kirchoff et al 1999.…”

mentioning

confidence: 99%

Natural and anthropogenic factors shape metazoan parasite community structure in mummichog (Fundulus heteroclitus) from two estuaries in New Brunswick, Canada

Blanar¹,

Marcogliese²,

Couillard³

2011

FOLIA PARASIT

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the mummichog Fundulus heteroclitus (L.) is abundant in euryhaline environments on the east coast of North America, ranging from the gulf of Mexico to the gulf of st. lawrence. it is a common prey item for several species of fishes and shorebirds, and is therefore a key component in intertidal food webs (Scott and Scott 1988). Mummichog are relatively long-lived, with a life span of up to five years, and are largely sedentary, feeding mainly on benthic invertebrates within a restricted home range. these traits make mummichog of potential interest as environmental indicators (e.g., see Finley et al. 2009). Between 1993 and 1995, populations of mummichog were extensively studied in two New Brunswick (canada) rivers putatively experiencing different levels of anthropogenic stress. the Miramichi river received secondary treatment effluent from a bleached kraft pulp mill (BKM), primary treated wastewater from a groundwood mill, effluent from a former wood-preserving plant, and municipal waste. conversely, the Bouctouche river, located approximately 90 km south of the Miramichi, was considered comparatively less polluted; however, it was still subject to non-point inputs of fertilizer and pesticides, as well as municipal effluents from the towns of Bouctouche and sainte-Marie, New Brunswick (Fig. 1). As part of a multidisciplinary effort to contrast the environmental status of the two rivers, a series of coordinated ecotoxicological studies examined a wide range of endpoints in mummichog from two sites in each river, collecting information on levels of individual contaminants in fish tissues, reproductive parameters, measures of immune function, and genetic effects. Mummichog from the site nearest the BKM had elevated tissue levels of chlorophenolic com- ) from a site on the Miramichi River that received bleached kraft pulpmill and municipal effluent. The present study reports differences in the abundance of individual parasite species, as well as parasite infracommunity and component community composition, in mummichog from both rivers. These differences were evaluated in relation to host (size, condition, immune function, tissue organochlorine contaminant levels) and environmental (faecal coliform counts, salinity, temperature) data derived from the previously published studies. Overall, 18 parasite species were identified, the most common of which were Ascocotyle sp. larv., Ornithodiplostomum sp. larv., Posthodiplostomum sp. larv., and Proteocephalus filicollis (Rudolphi, 1802). There were broad differences in parasite community structure and composition between rivers and within rivers, the most prominent pattern being a pronounced difference between sites in the upper and lower estuary of each river that was likely driven by salinity. Mean infracommunity richness was also positively related to faecal coliforms (considered here as a surrogate measure of eutrophication via municipal sewage), and both were highest at the most polluted site. We noted no other significant relationships. Thus our data suggest that the...

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Modifications of the reproductive period in mummichog (Fundulus heteroclitus) living downstream from a bleached kraft pulp mill in the Miramichi Estuary, New Brunswick, Canada

Cited by 53 publications

References 28 publications

Acute and early life stage toxicity of industrial effluent on Japanese medaka (Oryzias latipes)

Acute and early life stage toxicity of industrial effluent on Japanese medaka (Oryzias latipes)

Phagocytic and Metabolic Activities of Macrophages from Mummichog Naturally Exposed to Pulp Mill Effluents in the Miramichi River

Natural and anthropogenic factors shape metazoan parasite community structure in mummichog (Fundulus heteroclitus) from two estuaries in New Brunswick, Canada

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