Podcast
Questions and Answers
How is the hormone typically applied in aquaculture?
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?
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?
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?
What is the shelf-life of the hormone in feed?
Why should the hormone be protected from direct sunlight?
Why should the hormone be protected from direct sunlight?
What is the recommended dosage of the hormone for improving growth in fish and shellfish?
What is the recommended dosage of the hormone for improving growth in fish and shellfish?
What is the shelf life of the hormone in fish and shellfish?
What is the shelf life of the hormone in fish and shellfish?
How is serotonin administered to shellfish?
How is serotonin administered to shellfish?
What is the function of serotonin in shellfish?
What is the function of serotonin in shellfish?
What is the recommended dosage of the hormone for fish and shellfish?
What is the recommended dosage of the hormone for fish and shellfish?
What is the mode of excretion of serotonin in the animal body?
What is the mode of excretion of serotonin in the animal body?
What is the target organism for the hormone in aquaculture?
What is the target organism for the hormone in aquaculture?
In what percentage of time is the hormone eliminated from the body?
In what percentage of time is the hormone eliminated from the body?
What is the purpose of using the hormone in aquaculture?
What is the purpose of using the hormone in aquaculture?
How is the hormone administered to target organisms through feed?
How is the hormone administered to target organisms through feed?
What is the shelf-life of the hormone from the date of incorporation?
What is the shelf-life of the hormone from the date of incorporation?
What is the recommended dosage of the hormone through diet?
What is the recommended dosage of the hormone through diet?
What happens to the hormone when exposed to light?
What happens to the hormone when exposed to light?
What is the functional component of 17α-Ethynyltestosterone?
What is the functional component of 17α-Ethynyltestosterone?
At what dosage does 17α-Ethynyltestosterone stimulate the undifferentiated gonad to differentiate into the testis?
At what dosage does 17α-Ethynyltestosterone stimulate the undifferentiated gonad to differentiate into the testis?
What is the recommended method of applying 17α-Ethynyltestosterone in aquaculture?
What is the recommended method of applying 17α-Ethynyltestosterone in aquaculture?
What is the side effect observed in animals during treatment with 17α-Ethynyltestosterone?
What is the side effect observed in animals during treatment with 17α-Ethynyltestosterone?
What is the shelf-life of 17α-Ethynyltestosterone from the date of incorporation into the feed?
What is the shelf-life of 17α-Ethynyltestosterone from the date of incorporation into the feed?
What is the primary use of 17α-Ethynyltestosterone?
What is the primary use of 17α-Ethynyltestosterone?
What is the functional component of 17β-0estradiol?
What is the functional component of 17β-0estradiol?
What is the mode of action of 17β-0estradiol?
What is the mode of action of 17β-0estradiol?
How is 17β-0estradiol typically administered in aquaculture?
How is 17β-0estradiol typically administered in aquaculture?
What happens to 17β-0estradiol in the environment?
What happens to 17β-0estradiol in the environment?
What is the recommended dosage of 17β-0estradiol through diet?
What is the recommended dosage of 17β-0estradiol through diet?
What is the use of 17β-0estradiol in aquaculture?
What is the use of 17β-0estradiol in aquaculture?
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.
