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Physical Properties of Amines01:26

Physical Properties of Amines

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Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
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Lethality Bioassay Using Artemia salina L.
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Published on: October 11, 2022

Sub-lethal ammonia toxicity in largemouth bass.

C D Suski1, J D Kieffer, S S Killen

  • 1Department of Biology, Kingston, Queen's University, Canada ON K7L 3N6. suskic@biology.queensu.ca

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
|January 30, 2007
PubMed
Summary

Sub-lethal ammonia negatively impacts largemouth bass recovery from exercise and causes erratic swimming. Angling tournament vessels can accumulate high ammonia levels, stressing fish.

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Area of Science:

  • Aquatic toxicology
  • Fish physiology
  • Environmental science

Background:

  • Current ammonia toxicity guidelines for fish use static, 96-h tests on immature fish.
  • These guidelines may not reflect real-world conditions in aquaculture, hauling, or angling tournaments involving mature fish and additional stressors.

Purpose of the Study:

  • To assess ammonia's impact on largemouth bass exercise recovery.
  • To observe largemouth bass behavioral responses to elevated ammonia.
  • To measure ammonia accumulation in live-release vessels during angling tournaments.

Main Methods:

  • Measured ammonia concentrations in live-release vessels at an angling tournament.
  • Exposed largemouth bass to varying total ammonia (T(amm)) concentrations (100 and 1000 microM).
  • Assessed fish ventilation rates, swimming behavior, and post-exercise recovery.

Main Results:

  • Angling tournament vessels reached nearly 200 microM T(amm) within 3 hours.
  • 1000 microM T(amm) significantly reduced ventilation rates and increased erratic swimming.
  • 100 microM T(amm) impaired largemouth bass exercise recovery compared to freshwater controls.

Conclusions:

  • Sub-lethal ammonia concentrations induce physiological disturbances in largemouth bass.
  • Elevated ammonia impairs the ability of largemouth bass to recover from exercise.
  • Ammonia levels in live-release vessels pose a significant risk to fish health during angling tournaments.