lab + lecture 1 &2

Question 1

which is the only legal anesthesia used for food fish in canada? how many days is its withdrawl time?

Answer 1

MS222, 21 days

Question 2

what are 2 types of non-chemichal anaesthesia?

Answer 2

hypothermia and electro-anaesthesia (electro fishing)

Question 3

6 guidelines when anesthetizing fish

Answer 3

1. starve for 24-72 hours
2. use lowest possible concentration of anesthetic
3. use glasses and latex gloves for personal safety
4. minimize time fish are anaesthetized
5. bath well aerated and at a similar temp.
6. recovery baths free-flowing w abundant supply of aerated water.

Question 4

Features of an ideal anaesthetic

Answer 4

• effective at low doses, wide safety margin
• rapid induction, water soluble, safe
• INEXPENSIVE

Question 5

types of anaesthetics

Answer 5

inhalation, injection, chemichal methods (in feed, stress free but slow), non-chemichal (electroanaesthsia, hypothermia)