Population-level effects in Amphiascus tenuiremis: Contrasting matrix- and individual-based population models

Belleza, Elin Lundström; Brinkmann, Markus; Preuß, Thomas G.; Breitholtz, Magnus

doi:10.1016/j.aquatox.2014.10.004

Cited by 5 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To test the chronic toxicity of triclosan, we used a multigeneration population development test with the crustacean N. spinipes . Based on the generation time of 15 d to 20 d for N. spinipes under the present experimental conditions , the population development test covers 2 to 3 generation cycles . Specific details are provided in the section Exposure test .…”

Section: Methodsmentioning

confidence: 99%

“…A dry weight of 5 μg per individual and an organic carbon content of 50% was used . The organic carbon content per vial used for the mass balance was based on 500 individuals, to simulate conditions with high organic carbon content . The fraction of triclosan in the organic carbon phase (f oc ) was calculated as

f_{o c} = \frac{C_{o c} \times M_{o c}}{C_{o c} \times M_{o c} + C_{s i l i c o n e} \times M_{s i l i c o n e} + C_{w} \times V_{w}}

where C oc is the concentration of triclosan in organic carbon (μg/kg), M oc is the amount of organic carbon in the system (kg), C Silicone is the concentration of triclosan in silicone (μg/kg), C w is the concentration of triclosan in the water phase (μg/L), and V w is the volume of water (L).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Passive dosing of triclosan in multigeneration tests with copepods – stable exposure concentrations and effects at the low μg/L range

Ribbenstedt

Mustajärvi

Breitholtz

et al. 2016

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

Ecotoxicity testing is a crucial component of chemical risk assessment. Still, due to methodological difficulties related to controlling exposure concentrations over time, data on long-term effects of organic chemicals at low concentrations are limited. The aim of the present study was, therefore, to test the applicability of passive dosing to maintain stable concentrations of the organochlorine bacteriocide triclosan in the water phase during a 6-wk multigeneration population development test with the harpacticoid copepod Nitocra spinipes. Triclosan was loaded into silicone (1000 mg), which was used as passive dosing phase in the exposure vials. The distribution ratio for triclosan between silicone and water (D silicone-water ) was 10466 AE 1927. A population development test was conducted at 3 concentration levels of triclosan that were measured to be 3 mg/L to 5 mg/L, 7 mg/L to 11 mg/L and 16 mg/L to 26 mg/L. The results demonstrate that passive dosing is applicable for long-term ecotoxicity testing of organic chemicals, including during significant growth of the test organism population. Shifts in the demographic structure of the population during exposure suggest the most severe effects were exerted on juvenile development. Progressively lower development index values in the populations exposed to increasing triclosan concentrations suggest developmental retardation. The results further stress the need for chronic exposure during ecotoxicity testing in chemical risk assessment because even the most sensitive endpoint was not significant until after 7 d of exposure.

show abstract

Section: Methodsmentioning

confidence: 99%

f_{o c} = \frac{C_{o c} \times M_{o c}}{C_{o c} \times M_{o c} + C_{s i l i c o n e} \times M_{s i l i c o n e} + C_{w} \times V_{w}}

Section: Methodsmentioning

confidence: 99%

Passive dosing of triclosan in multigeneration tests with copepods – stable exposure concentrations and effects at the low μg/L range

Ribbenstedt

Mustajärvi

Breitholtz

et al. 2016

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…The objective of this study was to develop an individual‐based model (IBM) to inform future red drum stocking strategies by forecasting the genetic effects on the local spawning population offshore the Charleston Harbor estuary using known genetic and life history data. Individual‐based models provide tremendous flexibility in their application to a variety of ecological questions, such as examining the effects of pollution on development and reproduction (Lundström Belleza, Brinkmann, Preuss & Breitholtz, ), determining the influence of adult reproductive success and egg survival on population viability (Mazaris, Fiksen & Matsinos, ) and quantifying changes to genetic diversity of a fragmented population under several management approaches (Bruford et al., ). Although powerful, applying an IBM to a specific management case requires accurate demographic data to simulate the life history of the organism of concern.…”

Section: Introductionmentioning

confidence: 99%

Forecasting the genetic influences of red drum stock enhancement in South Carolina

Katalinas

Robinson

Strand

et al. 2019

Fisheries Management Eco

View full text Add to dashboard Cite

The South Carolina Department of Natural Resources (SCDNR) began stocking red drum, Sciaenops ocellatus (Linnaeus), in 1989 to augment the abundance of juveniles available for recreational harvest in South Carolina estuaries. While stock enhancement can help supplement wild populations under high fishing pressure, releasing hatchery‐raised fish into the wild also presents the risk of decreased genetic diversity. An individual‐based model (IBM) was developed to forecast the genetic influences of stocking on the wild spawning population to inform responsible stocking strategies. Model results indicated the SCDNR red drum stock enhancement programme should maintain mean contributions of stocked fish no greater than 30% per year class over a 45‐year stocking period, coupled with at least 10 effective breeders in the hatchery replaced annually, to maintain current levels of genetic diversity estimated in the wild population. The IBM is a useful tool for hatchery managers to guide responsible stock enhancement.

show abstract

Life cycle exposure to titanium dioxide nanoparticles (TiO2-NPs) induces filial toxicity and population decline in the nematode Caenorhabditis elegans

Yen,

Huang,

et al. 2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

Population-level effects in Amphiascus tenuiremis: Contrasting matrix- and individual-based population models

Cited by 5 publications

References 30 publications

Passive dosing of triclosan in multigeneration tests with copepods – stable exposure concentrations and effects at the low μg/L range

Passive dosing of triclosan in multigeneration tests with copepods – stable exposure concentrations and effects at the low μg/L range

Forecasting the genetic influences of red drum stock enhancement in South Carolina

Life cycle exposure to titanium dioxide nanoparticles (TiO2-NPs) induces filial toxicity and population decline in the nematode Caenorhabditis elegans

Contact Info

Product

Resources

About