Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Hansen, Flemming Thorbjørn; Forbes, Valery E.; Forbes, Thomas L.

doi:10.2307/2641138

Cited by 24 publications

(42 citation statements)

References 30 publications

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“…I relative to the control, a difference that was not statistically significant. Overall, these findings are in agreement with other studies illustrating that toxic responses of single individual-level traits do not necessarily result in equivalent population-level responses [10,12,24,27]. Thus population models that integrate individual-level responses at the population level can play a useful role in extrapolating laboratory test endpoints to likely ecological impacts.…”

Section: Population Responses To Hhcb Exposuresupporting

confidence: 80%

“…I are within the range of data previously reported [27,28,32]. Worms grew steadily until an age of 47 d, at which time individuals in the 168 mg/kg HHCB treatment differed significantly from the control group.…”

Section: Adult Responses To Hhcb Exposuresupporting

confidence: 70%

“…I [20,[26][27][28][29], indicating that experimental conditions were favorable for worm survival, growth and reproduction.…”

Section: Discussionmentioning

confidence: 99%

“…The t a values are within the range previously reported [34], supporting the use of projection matrices with age intervals of one week in demographic analyses with Capitella sp. I [9,27,28].…”

Section: Adult Responses To Hhcb Exposurementioning

confidence: 99%

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Individual‐ and population‐level effects of the synthetic musk, hhcb, on the deposit‐feeding polychaete, Capitella sp. I

Ramskov

Selck

Salvitod

et al. 2009

Enviro Toxic and Chemistry

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Abstract-A life table response experiment lasting 120 d was used to investigate the effects of the synthetic polycyclic musk HHCB (1,3,4,6,7,8-hexahydro-4,6,6,7,8-hexamethylcyclopenta-c-2-benzopyrane; 0, 1.5, 26, 123, and 168 mg/kg dry wt sediment) on the life history of the infaunal polychaete Capitella species I. The HHCB exposure showed no detectable effects on adult survival, age at first reproduction, length of the reproductive period, number of broods, individual worm body volumes, or body size-specific egestion rates. In contrast, HHCB significantly affected juvenile survival ($123 mg/kg), maturation time (168 mg/kg), total number of eggs produced ($26 mg/kg), and brood size ($123 mg/kg) and marginally increased time between breeding attempts ($26 mg/kg). A declining trend was observed for population growth rate with increasing HHCB concentrations, but differences between the control and exposed groups were not significant. Thus, despite detectable effects of HHCB on individual life-history traits, the results suggest that environmentally realistic concentrations of HHCB are not likely to reduce the growth rate of Capitella sp. I populations.

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Section: Population Responses To Hhcb Exposuresupporting

confidence: 80%

Section: Adult Responses To Hhcb Exposuresupporting

confidence: 70%

“…I [20,[26][27][28][29], indicating that experimental conditions were favorable for worm survival, growth and reproduction.…”

Section: Discussionmentioning

confidence: 99%

Section: Adult Responses To Hhcb Exposurementioning

confidence: 99%

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Individual‐ and population‐level effects of the synthetic musk, hhcb, on the deposit‐feeding polychaete, Capitella sp. I

Ramskov

Selck

Salvitod

et al. 2009

Enviro Toxic and Chemistry

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“…For example, higher juvenile mortality is generally linked to an early onset of reproduction (Stearns and Koella 1986). In organisms with plastic life-history traits, like D. magna (Enserink 1995), a response to low-level toxicity might thus lead to an allocation of resources to increase the fecundity early in the life cycle (Hansen et al 1999;Mauri et al 2003;Twombly et al 1998). At high levels of toxicity, the general development of the organisms is severely impaired and all reproductive characters are negatively affected (i.e., maturity is delayed and fecundity is reduced) (Enserink et al 1995;Hansen et al 1999;Mauri et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Reduced Fitness of Daphnia magna Fed a Bt-Transgenic Maize Variety

Bøhn

Primicerio

Hessen

et al. 2008

Arch Environ Contam Toxicol

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Genetically modified (GM) maize expressing the Bt-toxin Cry1Ab (Bt-maize) was tested for effects on survival, growth, and reproduction of the water flea Daphnia magna, a crustacean arthropod commonly used as a model organism in ecotoxicological studies. In three repeated experiments, D. magna were fed 100% ground maize in suspension, using either GM or isogenic unmodified (UM) maize. D. magna fed GM-maize showed a significantly reduced fitness performance: The mortality was higher, a lower proportion of females reached sexual maturation, and the overall egg production was lower compared to D. magna fed UM isogenic maize. We conclude that the tested variety of Bt-maize and its UM counterpart do not have the same quality as food sources for this widely used model organism. The combination of a reduced fitness performance combined with earlier onset of reproduction of D. magna fed Bt-maize indicates a toxic effect rather than a lower nutritional value of the GMmaize.

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The antimicrobial triclocarban stimulates embryo production in the freshwater mudsnail Potamopyrgus antipodarum

Giudice

Young

2010

Enviro Toxic and Chemistry

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Recent research has indicated that the antimicrobial chemical triclocarban (TCC) represents a new type of endocrine disruptor, amplifying the transcriptional activity of steroid hormones and their receptors while itself exhibiting little affinity for these receptors. The effects of TCC were studied in the freshwater mudsnail Potamopyrgus antipodarum. Specimens were exposed to concentrations ranging from 0.05 to 10.5 μg/L dissolved TCC and were removed and dissected, and embryos contained within the brood pouch were counted and classified as shelled or unshelled after2 and 4weeksof exposure. After 4 weeks, environmentally relevant TCC concentrations of 1.6 to 10.5 μg/L resulted in statistically significant increases in the number of unshelled embryos, while 0.2, 1.6, and 10.5 μg/L exposures significantly increased numbers of shelled embryos. The lowest observed effect concentration (LOEC) was 0.2 μg/L, the no observed effect concentration (NOEC) was 0.05 μg/L, and the EC10 and EC50 for unshelled effects were 0.5 μg/L and 2.5 μg/L, respectively. Given the widespread occurrence of TCC in the environment and effects shown at environmentally relevant concentrations, these results indicate that TCC may be causing reproductive effects in the environment. Furthermore, the present study indicates that environmental risk from a new class of EDCs is both qualitatively and quantitatively similar to risk from existing classes of EDCs.

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Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Cited by 24 publications

References 30 publications

Individual‐ and population‐level effects of the synthetic musk, hhcb, on the deposit‐feeding polychaete, Capitella sp. I

Individual‐ and population‐level effects of the synthetic musk, hhcb, on the deposit‐feeding polychaete, Capitella sp. I

Reduced Fitness of Daphnia magna Fed a Bt-Transgenic Maize Variety

The antimicrobial triclocarban stimulates embryo production in the freshwater mudsnail Potamopyrgus antipodarum

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