HOME >> BIOLOGY >> NEWS
Fish can determine their social rank by observation alone, study finds

A male fish can size up potential rivals, and even rank them from strongest to weakest, simply by watching how they perform in territorial fights with other males, according to a new study by Stanford University scientists. The researchers say their discovery provides the first direct evidence that fish, like people, can use logical reasoning to figure out their place in the pecking order.

The study, published in the Jan. 25 edition of the journal Nature, is based on a unique experiment with cichlids (SIK-lids), small territorial fish from Africa. "In their natural habitat, male cichlids are constantly trying to ascend socially by beating each other up," said study co-author Russell D. Fernald, professor of biological sciences at Stanford. "It would be really valuable for them to know in advance who to pick a fight with."

The Nature experiment was designed by lead author Logan Grosenick, a graduate student in statistics at Stanford, and Tricia S. Clement, a former postdoctoral fellow. Their goal was to determine whether territorial fish use a type of reasoning called "transitive inference," in which known relationships serve as the basis for understanding unfamiliar ones.

"Transitive inference is essential to logical reasoning," Fernald explained. "It's something that kids generally figure out by age 4 or 5--Mary is taller than Fred, Fred is taller than Pete, therefore Mary is taller than Pete. It's been demonstrated in primates, rats and some bird species, but how and why it evolved in animals is a matter of debate."

Aggressive bouts

In the experiment, the Stanford team used a popular laboratory fish called Astatotilapia burtoni, one of many cichlid species that inhabit Lake Tanganyika in eastern Africa. A. burtoni males are extremely territorial and regularly engage in aggressive fights, the outcome of which determines who gets access to food and mates.

"Males that repeatedly lose fights ar
'"/>

Contact: Mark Shwartz
mshwartz@stanford.edu
650-723-9296
Stanford University
24-Jan-2007


Page: 1 2 3 4

Related biology news :

1. What determines the speed at which birds fly?
2. HWI researchers determine structure of protein from pathogen associated with CF and TB
3. MIT tool determines landslide risk in tropics
4. Left-right wiring determined by neural communication in the embryonic worm
5. Researcher to determine why oil still remains from Exxon Valdez
6. Stem cells determine their daughters fate
7. FSU researchers determine a critical factor in workings of proteins
8. Columbia scientists determine 3-dimensional structure of cells fuel gauge
9. Human preference for other species could determine whether they survive
10. The floral network -- what determines who pollinates whom
11. Fighting like a girl or boy determined by gene in fruit flies

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Fish can determine their social rank observation alone study finds

(Date:8/11/2015)... GOTHENBURG, Sweden , August 11, 2015 ... sensor FPC1155. Already received as well as expected revenues in 2015 ... included in FPC,s communicated revenue guidance of approximately 2,200 MSEK for ... is a prominent smartphone manufacturer ... ZUK selected FPC1 155 ...
(Date:8/6/2015)... Germany , August 6, 2015 /PRNewswire/ ... SensoMotoric Instruments (SMI) shows the world,s first ... based on Epson,s Moverio BT-200 see-through head mounted display ... new solution, unprecedented quality and efficiency is brought to ... displays. For the first time, professionals and researchers can ...
(Date:8/5/2015)... 5, 2015 The biosensors market is proving ... penetration into newer sectors, and development of devices resulting ... space has seen the entry of multiple participants each ... (Photo - http://photos.prnewswire.com/prnh/20150805/255570 ) ... of the Global Biosensors Market ( http://www.frost.com/nee9 ), ...
Breaking Biology News(10 mins):FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 2SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 3Innovative Biosensors Incite Use in Non-Traditional Applications 2Innovative Biosensors Incite Use in Non-Traditional Applications 3Innovative Biosensors Incite Use in Non-Traditional Applications 4
(Date:9/2/2015)... , Sep. 02, 2015 ... ) has announced the addition of Jain ... Markets and Companies" to their offering. ... several technologies besides fluorescence in situ hybridization ... FISH. Molecular cytogenetics includes application of nanobiotechnology, ...
(Date:9/2/2015)... Sept. 2, 2015 Australian prostate cancer technology ... Australian science prize recognising ,outstanding, science that uses its ... globally launch a novel prostate cancer diagnostic test known ... level consortium taking out the peer-reviewed Australian Museum Eureka ... This prize is awarded for ground ...
(Date:9/2/2015)... , September 2, 2015 BiondVax ... of the National Institute of Allergy and Infectious Diseases (NIAID), ... the Department of Health and Human Services (HHS), to launch ... the United States in the 2015-16 timeframe. ... vaccine candidate, Multimeric-001 (M-001), as a primer vaccine, which would ...
(Date:9/2/2015)... ... September 02, 2015 , ... Temarry Recycling's ... entire waste to energy process and continue to contribute to the sustainability of ... Temarry’s Waste to Energy process has been operating at their Mexico facility, Recicladora ...
Breaking Biology Technology:Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 2Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 3Prostate Cancer Company Minomic Wins Prestigious Eureka Science Prize 2Prostate Cancer Company Minomic Wins Prestigious Eureka Science Prize 3BiondVax Announces Intent to Launch a Phase 2 Trial in the United States in Collaboration with the U.S. National Institutes of Health 2BiondVax Announces Intent to Launch a Phase 2 Trial in the United States in Collaboration with the U.S. National Institutes of Health 3Temarry Recycling’s New $100,000 Waste to Energy Renovation 2
Cached News: