Featured Research

from universities, journals, and other organizations

First evidence of fish sensing geomagnetic fields from a Czech Christmas market

Date:
December 5, 2012
Source:
Public Library of Science
Summary:
Carp stored in large tubs at Czech Christmas markets align themselves in the north-south direction, suggesting they possess a previously unknown capacity to perceive geomagnetic fields, according to a new study.

Arrows were drawn along the median axes of all the fish visible in the photograph (the arrow axial course was marked unambiguously by the long dorsal fin, its direction by the head position). (C, D) The underlying photograph was removed and replaced by a compass rosette divided radially into 36 ten-degree segments. (E) Each arrow was moved to the center of the rosette and its azimuthal direction was determined by the nearest 10° mark. (F) Mean unimodal, bimodal and quadrimodal vectors were calculated for the photograph.
Credit: Vlastimil Hart et al. Magnetic Alignment in Carps: Evidence from the Czech Christmas Fish Market. PLoS ONE, 2012; 7 (12): e51100 DOI: 10.1371/journal.pone.0051100

Carp stored in large tubs at Czech Christmas markets align themselves in the north-south direction, suggesting they possess a previously unknown capacity to perceive geomagnetic fields, according to a new study published December 5 in the open access journal PLOS ONE, led Hynek Burda from the University of Life Sciences (Prague), Czech Republic and colleagues from other institutions.

The authors photographed and analyzed the positions of fish in the traditional Czech Christmas market, where carp are stored live in large tubs prior to being sold for the holiday feast.

Their study included over 14,000 fish in 25 markets, and the majority of these fish were found to align themselves along the north-south axis. The fish were accustomed to human onlookers, and street lights and other potential disturbances seemed to have no effect on the orientation of the fish.

In the absence of other common stimuli for orientation like light, sound or the flow of water, the authors suggest that the fish most likely align themselves to geomagnetic cues.


Story Source:

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


Journal Reference:

  1. Vlastimil Hart, Tomáš Kušta, Pavel Němec, Veronika Bláhová, Miloš Ježek, Petra Nováková, Sabine Begall, Jaroslav Červený, Vladimír Hanzal, Erich Pascal Malkemper, Kamil Štípek, Christiane Vole, Hynek Burda. Magnetic Alignment in Carps: Evidence from the Czech Christmas Fish Market. PLoS ONE, 2012; 7 (12): e51100 DOI: 10.1371/journal.pone.0051100

Cite This Page:

Public Library of Science. "First evidence of fish sensing geomagnetic fields from a Czech Christmas market." ScienceDaily. ScienceDaily, 5 December 2012. <www.sciencedaily.com/releases/2012/12/121205200057.htm>.
Public Library of Science. (2012, December 5). First evidence of fish sensing geomagnetic fields from a Czech Christmas market. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2012/12/121205200057.htm
Public Library of Science. "First evidence of fish sensing geomagnetic fields from a Czech Christmas market." ScienceDaily. www.sciencedaily.com/releases/2012/12/121205200057.htm (accessed August 23, 2014).

Share This




More Plants & Animals News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Endangered Red Wolves Face Uncertain Future

Endangered Red Wolves Face Uncertain Future

AP (Aug. 22, 2014) — A federal judge temporarily banned coyote hunting to save endangered red wolves, but local hunters say that the wolf preservation program does more harm than good. Meanwhile federal officials are reviewing its wolf program in North Carolina. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Farm Resurgence Grows With Younger Crowd

Farm Resurgence Grows With Younger Crowd

AP (Aug. 22, 2014) — New England farms are seeing a surge in younger farm hands as the 'buy local' food movement grows across the country. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) — An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Newsy (Aug. 21, 2014) — According to a new study, spiders that live in cities are bigger, fatter and multiply faster. Video provided by Newsy
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:
from the past week

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