Featured Research

from universities, journals, and other organizations

Do fish feel pain? Norwegian research suggests they can

Date:
January 15, 2010
Source:
Norwegian School of Veterinary Science
Summary:
A Norwegian researcher studying nociception and pain in teleost fish concludes that is that it is very likely the fish can indeed feel pain.

Goldfish.
Credit: iStockphoto/Parpalea Catalin

Norwegian School of Veterinary Science doctoral student Janicke Nordgreen has studied nociception and pain in teleost fish. Her conclusion is that it is very likely the fish can feel pain.

Related Articles


In her dissertation, Nordgreen studied the response to potentially painful stimuli in groups of cells and at the individual. As consciousness is essential to feel pain, Nordgreen tested as well whether fish can be taught to solve a task as in humans requires conscious attention.

The research on pain and nociception (physiological detection of stimuli that can cause tissue damage) in fish is important primarily because pain is a serious threat to animal welfare. In addition, the research may increase our understanding of the evolution of consciousness and the nociceptive system.

In her project, Nordgreen used Atlantic salmon (Salmo salar), goldfish (Carassius auratus) and rainbow trout (Oncorhynchus mykiss). Her research showed that noxious galvanic stimulation elicited activity in the Atlantic salmon telecephalon, and that the response was graded with stimulus intensity. In another experiment, the goldfish showed escape responses when the temperature exceeded 38 degrees C, which is within the temperature range that is deadly to goldfish. This suggests that the ability to respond to harmful point heat is a conserved feature among vertebrates.

The third experiment mapped the metabolism of morphine in Atlantic salmon and goldfish. It was found that they metabolize and secrete morphine more slowly than humans, and that the morphine in small extent reaches the brain of the fish. It was shown that the elimination half life of morphine was approximately one order of magnitude higher than in humans for both species.

The last experiment showed that rainbow trout could learn by trace classical condition. By using reinforcer devaluation, it was also found that the underlying association was most likely of a stimulus-stimulus nature.

No single experiment can unequivocally answer the question of whether fish can feel pain, but the current findings, seen in the context of existing literature strongly indicates that fish are not only capable of nociception but also of conscious perception of pain.

Janicke Nordgreen defended her PhD-thesis, entitled "Nociception and pain in teleost fish," at the Norwegian School of Veterinary Science on October 28, 2009.


Story Source:

The above story is based on materials provided by Norwegian School of Veterinary Science. Note: Materials may be edited for content and length.


Cite This Page:

Norwegian School of Veterinary Science. "Do fish feel pain? Norwegian research suggests they can." ScienceDaily. ScienceDaily, 15 January 2010. <www.sciencedaily.com/releases/2010/01/100112090126.htm>.
Norwegian School of Veterinary Science. (2010, January 15). Do fish feel pain? Norwegian research suggests they can. ScienceDaily. Retrieved March 27, 2015 from www.sciencedaily.com/releases/2010/01/100112090126.htm
Norwegian School of Veterinary Science. "Do fish feel pain? Norwegian research suggests they can." ScienceDaily. www.sciencedaily.com/releases/2010/01/100112090126.htm (accessed March 27, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, March 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Lioness Has Rare Five-Cub Litter

Raw: Lioness Has Rare Five-Cub Litter

AP (Mar. 27, 2015) — A lioness in Pakistan has given birth to five cubs, twice the usual size of a litter. Queen gave birth to two other cubs just nine months ago. (March 27) Video provided by AP
Powered by NewsLook.com
Jockey Motion Tracking Reveals Racing Prowess

Jockey Motion Tracking Reveals Racing Prowess

Reuters - Innovations Video Online (Mar. 26, 2015) — Using motion tracking technology, researchers from the Royal Veterinary College (RVC) are trying to establish an optimum horse riding style to train junior jockeys, as well as enhance safety, health and well-being of both racehorses and jockeys. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Bear Cubs Tumble for the Media

Bear Cubs Tumble for the Media

Reuters - Light News Video Online (Mar. 26, 2015) — Two Andean bear cubs are unveiled at the U.S. National Zoo in Washington, D.C. Alicia Powell reports. Video provided by Reuters
Powered by NewsLook.com
Botswana Talks to End Illegal Wildlife Trade

Botswana Talks to End Illegal Wildlife Trade

AFP (Mar. 25, 2015) — Experts are gathering in Botswana to try to end the illegal wildlife trade that is decimating populations of elephants, rhinos and other threatened species. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins