|
Anesthetic effect of ethanol, MS222 and cold maintenance on freshwater crayfish (Astacus leptodactylus)
|
M. Seidgar *   , R. Jalili , A. Nekoueifard , S. Mirzargar , A. Abbaspour Anbi , Zh. Alizadeh Osalou |
| National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Urmia, Iran. |
|
|
Abstract: (15 Views) |
| Freshwater crayfish from the Aras Dam are considered one of the country's high-value fishery export resources. Freshwater crayfish are exported live and at low temperatures. Limited studies have been conducted on their welfare and the use of anesthetics in stressful situations such as handling, cooking, manipulation, sampling, and transportation. The present study was conducted to determine the effective dose and time of anesthesia induction and recovery time using different levels of MS-222 (levels 0, 50, 100, 200, 400, 800 and 1200 mg/L), ethanol (levels 0, 50, 100, 200, 400, 800, 1200 and 1600 mg/L) and cold (temperatures 4, 6, 8 and 25°C as control) in freshwater crayfish (Astacus leptodactylus). In this study, the duration of anesthesia induction and recovery time of freshwater crayfish were investigated with the aim of determining the appropriate anesthetic concentration for young crayfish weighing approximately 20±3 grams. The results of the present study showed that the use of high levels of MS-222 was not effective in anesthetizing freshwater crayfish. The use of ethanol at high levels (30%) was also able to anesthetize crayfish in a short time, but at low levels this process required a long time. The results also showed that a low temperature of 4°C had the shortest induction time and the fastest recovery from anesthesia compared to MS-222 and ethanol. Therefore, the use of ethanol due to high stress induction and MS-222 due to high price and low performance in freshwater crayfish anesthesia is not recommended. |
|
| Keywords: Anesthesia, MS-222, Ethanol, Cold, Freshwater crayfish |
|
|
Full-Text [PDF 336 kb]
(11 Downloads)
|
Type of Study: Research |
Subject:
General
Received: 2025/12/2 | Accepted: 2026/03/30
|
|
|
|
|
|
|
| Send email to the article author |
|
|
|
| Add your comments about this article |
|
|
|
