API

Relationship: 1029

Title

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Reduced, Swimming performance leads to Reduced, Young of year survival

Upstream event

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Reduced, Swimming performance

Downstream event

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Reduced, Young of year survival

Key Event Relationship Overview

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AOPs Referencing Relationship

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Taxonomic Applicability

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Term Scientific Term Evidence Link
zebrafish Danio rerio NCBI
fathead minnow Pimephales promelas NCBI

Sex Applicability

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Sex Evidence
Unspecific

Life Stage Applicability

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Term Evidence
All life stages

Key Event Relationship Description

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Evidence Supporting this KER

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Biological Plausibility

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Reduced swimming performance is likely to affect essential endpoints such as predator avoidance, feeding behaviour and reproduction. These parameters are biologicaly plausible to affect young-of-year survival, especially in a non-laboratory environment where food is scarce and predators are abundant.

Empirical Evidence

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All zebrafish larvae that failed to inflate the posterior chamber after exposure to 2 mg/L iopanoic acid (IOP), died by the age of 9 dpf (Stinckens et al., unpublished). Since larvae from the same group that were able to inflate the posterior chamber survived, it is plausible to assume that the cause of death was the inability to swim and find food due to the failure to inflate the posterior swim bladder chamber.

Uncertainties and Inconsistencies

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Quantitative Understanding of the Linkage

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Response-response Relationship

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Time-scale

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Reduced swimming performance is not expected to immediately lead to mortality. Depending on the extent of the reduction in swimming performance and depending on the cause of death (e.g., starvation due to the inability to find food, being caught by a predator) the lag time may vary.

As an example, Stinckens et al. (unpublished) found that zebrafish larvae that failed to inflate the swim bladder at 5 dpf and did not manage to inflate it during the days afterwards died by the age of 9 dpf. Since zebrafish initiate exogenous feeding around day 5 when the yolk is almost completely depleted, there was a lag period of around 4 days after which reduced feeding resulted in mortality. Obviously, in a laboratory setup there is no increased risk of being caught by a predator.

All zebrafish larvae that failed to inflate the posterior chamber after exposure to 2 mg/L iopanoic acid (IOP), died by the age of 9 dpf (Stinckens et al., unpublished). Since larvae from the same group that were able to inflate the posterior chamber survived, it is plausible to assume that the cause of death was the inability to swim and find food due to the failure to inflate the posterior swim bladder chamber.

Known modulating factors

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Known Feedforward/Feedback loops influencing this KER

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Domain of Applicability

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Importance of swimming performance on young of year survival is generally applicable to fish.

References

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