Hormone Application in Aquaculture
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Questions and Answers

How is the hormone typically applied in aquaculture?

  • Through oral administration
  • Through injection
  • Through topical application
  • Through feed or adding to the medium (correct)

    • What is a potential side effect of the hormone in animals?

  • Neurotoxicity
  • Hepatotoxicity (correct)
  • Cardiotoxicity
  • Nephrotoxicity

    • How quickly is the hormone eliminated from the body?

  • Within 24 hours (correct)
  • Within 72 hours
  • Within 12 hours
  • Within 48 hours

    • What is the shelf-life of the hormone in feed?

    <p>90 days</p> Signup and view all the answers

    Why should the hormone be protected from direct sunlight?

    <p>It is photosensitive</p> Signup and view all the answers

    What is the recommended dosage of the hormone for improving growth in fish and shellfish?

    <p>1-10 ppm</p> Signup and view all the answers

    What is the shelf life of the hormone in fish and shellfish?

    <p>90 days</p> Signup and view all the answers

    How is serotonin administered to shellfish?

    <p>Through feed</p> Signup and view all the answers

    What is the function of serotonin in shellfish?

    <p>To induce spawning</p> Signup and view all the answers

    What is the recommended dosage of the hormone for fish and shellfish?

    <p>1 to 5 ppm</p> Signup and view all the answers

    What is the mode of excretion of serotonin in the animal body?

    <p>Through urine</p> Signup and view all the answers

    What is the target organism for the hormone in aquaculture?

    <p>Shellfish</p> Signup and view all the answers

    In what percentage of time is the hormone eliminated from the body?

    <p>24 hours</p> Signup and view all the answers

    What is the purpose of using the hormone in aquaculture?

    <p>To produce all-female seed of fish</p> Signup and view all the answers

    How is the hormone administered to target organisms through feed?

    <p>Through incorporation of hormone into the feed</p> Signup and view all the answers

    What is the shelf-life of the hormone from the date of incorporation?

    <p>90 days</p> Signup and view all the answers

    What is the recommended dosage of the hormone through diet?

    <p>20-120 ppm</p> Signup and view all the answers

    What happens to the hormone when exposed to light?

    <p>It is photosensitive</p> Signup and view all the answers

    What is the functional component of 17α-Ethynyltestosterone?

    <p>Phenanthrene nucleus</p> Signup and view all the answers

    At what dosage does 17α-Ethynyltestosterone stimulate the undifferentiated gonad to differentiate into the testis?

    <p>25 to 100 ppm</p> Signup and view all the answers

    What is the recommended method of applying 17α-Ethynyltestosterone in aquaculture?

    <p>Incorporation of hormone into the feed</p> Signup and view all the answers

    What is the side effect observed in animals during treatment with 17α-Ethynyltestosterone?

    <p>Hepatotoxicity</p> Signup and view all the answers

    What is the shelf-life of 17α-Ethynyltestosterone from the date of incorporation into the feed?

    <p>90 days</p> Signup and view all the answers

    What is the primary use of 17α-Ethynyltestosterone?

    <p>To produce all-male seed of fish</p> Signup and view all the answers

    What is the functional component of 17β-0estradiol?

    <p>The aromatic ring A</p> Signup and view all the answers

    What is the mode of action of 17β-0estradiol?

    <p>It stimulates the undifferentiated gonad to differentiate itself into an ovary</p> Signup and view all the answers

    How is 17β-0estradiol typically administered in aquaculture?

    <p>Through feed or by immersion in the medium containing the hormone</p> Signup and view all the answers

    What happens to 17β-0estradiol in the environment?

    <p>It is metabolized by many microbes in nature</p> Signup and view all the answers

    What is the recommended dosage of 17β-0estradiol through diet?

    <p>20 to 120 ppm</p> Signup and view all the answers

    What is the use of 17β-0estradiol in aquaculture?

    <p>To produce all-female seed of fish</p> Signup and view all the answers

    Study Notes

    Hormonal Applications in Aquaculture

    • Hormones can be applied through feed or medium incorporation.
    • Commonly used hormones include 17α-Ethynyltestosterone, 17β-Estradiol, 17α-Ethinyloestradiol, and Diethylstilbestrol.

    Mode of Action

    • 17α-Ethynyltestosterone (ET) stimulates undifferentiated gonads to develop into testis at low doses (25-100 ppm).
    • 17β-Estradiol triggers differentiation into ovaries.
    • 17α-Ethinyloestradiol also directs gonadal differentiation towards ovaries.

    Target Organisms

    • The hormones primarily target fish and shellfish, aiding in seed production and growth regulation.

    Side Effects and Environmental Impact

    • Hepatotoxicity is a potential side effect of the hormone ET during treatment.
    • No known deleterious effects on the environment are observed for most hormones.
    • Hormones are photosensitive and should be protected from sunlight.

    Residue Management

    • Hormonal residues are metabolized and mostly eliminated within 24 hours, with more than 90% excretion noted.
    • Serotonin and other hormones remain unknown regarding their environmental and residue effects.

    Application Recommendations

    • Hormones should be incorporated into feed for optimal administration.
    • Dosage recommendations vary:
      • ET: 25-100 ppm for all-male seed production, 1-10 ppm for growth enhancement.
      • 17β-Estradiol: 20-120 ppm through diet or 75-400 mg/L via immersion.
      • 17α-Ethinyloestradiol: 20-120 ppm through diet or 75-400 μg/L via immersion.
    • Diethylstilbestrol promotes growth but lacks detailed dosage recommendations.

    Shelf-life and Storage

    • Hormones have a shelf-life of 90 days post incorporation into feed.
    • Photosensitivity necessitates storage in dark conditions.

    Conclusion

    • Hormones play crucial roles in aquaculture for gender control and growth enhancement.
    • Careful application, monitoring for side effects, and residue management are essential for sustainable practices.

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    Description

    Learn about the mode of application, side effects, and environmental impact of a hormone used in aquaculture. Understand how to prepare the hormone for use and its metabolism in the animal body.

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