The effect of mercury on the feeding behavior of fathead minnows (Pimephales promelas)

Grippo, M.A; Heath, Alan G.

doi:10.1016/s0147-6513(02)00071-4

Cited by 41 publications

(22 citation statements)

References 61 publications

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“…All exposure regimes used in this study were sublethal, were similar to those used with other fish species, represent environmentally relevant concentrations, and produced similar LC 50 s for embryo exposures [42–47]. Although several studies have indicated greater MeHg uptake in fish than observed in this study [47–50], none of those involved developmental exposures targeted at and isolated to the earliest stages of embryonic neuron formation (the first 24 hpf in zebrafish).…”

Section: Discussionmentioning

confidence: 78%

Developmental selenomethionine and methylmercury exposures affect zebrafish learning

Smith¹,

Carvan²,

Dellinger³

et al. 2010

Neurotoxicology and Teratology

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Methylmercury (MeHg) is a ubiquitous environmental pollutant and has been shown to affect learning in vertebrates following relatively low exposures. Zebrafish were used to model long-term learning deficits after developmental MeHg exposure. Selenomethionine (SeMet) co-exposure was used to evaluate its role in neuroprotection. Embryos were exposed from 2-24 hours post fertilization to (1) MeHg without SeMet, (2) SeMet without MeHg and (3) in combination of MeHg and SeMet. In case (1), the levels of MeHg were 0.00, 0.01, 0.03, 0.06, 0.10, 0.30 µM. In case (2), the levels of SeMet were 0.00. 0.03, 0.06, 0.10, 0.30 µM. In case (3), co-exposure levels of (MeHg, SeMet) were (0.03, 0.03), (0.03, 0.06), (0.03, 0.10), (0.03, 0.30), (0.10, 0.03), (0.10, 0.06), (0.10, 0.10), (0.10, 0.30) µM. Learning functions were tested in individual adults, four months after developmental exposure using a spatial alternation paradigm with food delivery on alternating sides of the aquarium. Low levels of MeHg (<0.1 µM) exposure delayed learning in treated fish; fish exposed to higher MeHg levels were unable to learn the task; SeMet co-exposure did not prevent this deficit. These data are consistent with findings in laboratory rodents. The dorsal and lateral telencephalon are the primary brain regions in fish involved in spatial learning and memory. Adult telencephalon cell body density decreased significantly at all MeHg exposures >0.01 µM MeHg. SeMet co-exposure ameliorated but did not prevent changes in telencephalon cell body density. In summary, MeHg affected both learning and brain structure, but SeMet only partially reversed the latter.Descriptors developmental exposure; learning; mercury; selenium; spatial alternation; zebrafish

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Section: Discussionmentioning

confidence: 78%

Developmental selenomethionine and methylmercury exposures affect zebrafish learning

Smith¹,

Carvan²,

Dellinger³

et al. 2010

Neurotoxicology and Teratology

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“…Successful feeding is influenced by motivation (frequency of strikes), search effectiveness, selection, orientation, coordination, capture success, and handling time (Scharf et al 1998;Buckel et al 1999a;Buckel et al 1999b;Weis et al 2001;Weis et al 2003). Fathead minnows exposed to high concentrations of mercury had impaired foraging efficiency, increased pause time, and decreased capture speed (Grippo and Heath 2003). In some studies, frequency of strikes was more sensitive to contaminants than actual prey capture, suggesting that motivation was more affected than coordination as Brown and Johansen (1987) found with pentachlorophenol-treated fish.…”

Section: Bluefish Behavior and Sizementioning

confidence: 99%

The Effect of Contaminated Prey on Feeding, Activity, and Growth of Young-of-the-Year Bluefish, Pomatomus saltatrix, in the Laboratory

Candelmo

Deshpande

Dockum

et al. 2010

Estuaries and Coasts

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Young-of-the-year (YOY) bluefish, Pomatomus saltatrix, reside in some contaminated estuaries of the mid-Atlantic bight during their early life history, and as a result of this exposure, they may bioaccumulate high levels of contaminants, including polychlorinated biphenyls (PCBs), pesticides, and methyl mercury. Young-of-the-year bluefish from the Tuckerton, NJ, area of Great Bay (TK) were fed daily in a laboratory with common prey fish, menhaden, and mummichog from two sites: TK (reference) or Hackensack River (HR) (contaminated). Bluefish fed HR prey and the HR prey themselves had significantly elevated concentrations of PCBs, pesticides, and total mercury compared to TK counterparts. The bluefish fed contaminated prey for 4 months displayed significantly reduced feeding, spontaneous activity, and growth compared to the bluefish fed TK prey. Alterations of bluefish behavior and growth from exposure to contaminants may have detrimental effects on migration, overwinter survival, and recruitment success.

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“…Hamers and Krogh 1997;Power 1990). Grippo and Heath (2003) detected the effects of mercury on the foraging efficiency and capture speed of fathead minnows (Pimephales promelas) exposed to 13 and 57 lg/l HgCl 2 . The prey capture rate of mummichogs (Fundulus heteroclitus) in the laboratory was closely related to the diet of the fish in the field, thus representing a biomarker with high ecological relevance.…”

Section: Introductionmentioning

confidence: 99%

Impairment of trophic interactions between zebrafish (Danio rerio) and midge larvae (Chironomus riparius) by chlorpyrifos

et al. 2010

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The effects of chemicals on biotic interactions, such as competition and predation, have rarely been investigated in aquatic ecotoxicology. This study presents a new approach for the investigation of predator-prey interactions between zebrafish (Danio rerio) and midge larvae (Chironomus riparius) impaired by chlorpyrifos (CHP), a neurotoxic insecticide. With a simple experimental design including four different treatments: (1) control, (2) predator exposed, (3) prey exposed and (4) both, predator and prey, exposed, we were able to detect by visual observation an increase in the feeding rate of zebrafish preying on exposed chironomids after acute (2 h) exposure to 6 μg/l CHP. Previously, a decrease in the burrowing behaviour of exposed chironomid larvae was observed. However, when pre-exposing simultaneously both predators and prey, no significant differences in the feeding rate of zebrafish were observed. This suggests an impairment in prey recognition of the exposed zebrafish. At a lower CHP concentration (1 μg/l), no differences in feeding rate of zebrafish were observed. We therefore propose the use of trophic interactions as parameters in higher tier studies for chemical testing and evaluation of ecotoxicological risk assessment.

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The effect of mercury on the feeding behavior of fathead minnows (Pimephales promelas)

Cited by 41 publications

References 61 publications

Developmental selenomethionine and methylmercury exposures affect zebrafish learning

Developmental selenomethionine and methylmercury exposures affect zebrafish learning

The Effect of Contaminated Prey on Feeding, Activity, and Growth of Young-of-the-Year Bluefish, Pomatomus saltatrix, in the Laboratory

Impairment of trophic interactions between zebrafish (Danio rerio) and midge larvae (Chironomus riparius) by chlorpyrifos

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