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:2/23/2015)... Conn. , Feb. 23, 2015 NXT-ID, ... or the "Company"), a biometric authentication company focused on ... has filed provisional patent 62114357 for DISTRIBUTED ... this patent, NXT-ID introduces a new groundbreaking payment method. ... the payment account may only be accessed if both ...
(Date:2/12/2015)... 12, 2015   MedNet Solutions , a ... study management systems, has recently bolstered its ... iMedNet as the eClinical ... and healthcare consultants.  Building on the Program,s existing ... and numerous co-marketing opportunities), MedNet,s new and improved ...
(Date:2/9/2015)... Feb. 9, 2015  Lintec of America recently announced ... carbon nanotube (CNT) macrostructures, including sheets, yarns and ribbons, ... Leveraging the vast industrial resources of the ... , Lintec of America is forming the Nano-Science ... , focusing on scaling up the manufacturing and ...
Breaking Biology News(10 mins):NXT-ID Patents Voice Directed Payments 2NXT-ID Patents Voice Directed Payments 3MedNet Solutions Announces Key Enhancements To Its iMedNet Partner Program 2Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 2Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 3Lintec announces exclusive license to commercialize innovative carbon nanotube technology from the University of Texas at Dallas 4
(Date:3/4/2015)... , March 4, 2015  BioClinica®, Inc., ... technology provider, today announced that clinical trial ... convened at its annual European User Conference ... to discuss the use of its eClinical ... eClinical technologies include: the Microsoft Office-Smart OnPoint ...
(Date:3/4/2015)... California (PRWEB) March 04, 2015 ... (PCR) represents one of the fastest growing technologies in ... biologists in subcellular visualization is driving growth in nucleic ... for deeper understanding of gene expressions will continue to ... Expanding applications in fields ranging from pharma, biotech, food ...
(Date:3/4/2015)... 4, 2015 Lancée ... Paris en décembre 2011, l,étude collaborative ... », qui compare   l es microsphères ... sorafénib dans le carcinome hépatocellulaire avancé, a recruté ... foie avancé   ; les résultats sont attendus ...
(Date:3/3/2015)... March 3, 2015 /PRNewswire/ - Aptose Biosciences Inc. (NASDAQ: ... and molecular diagnostics that target the underlying mechanisms of ... seventh-month period ended December 31, 2014. Effective ... end from May 31 to December 31. As a ... today are for the quarter and the seven months ...
Breaking Biology Technology:BioClinica Teams With Pharma To Tackle Clinical Trial Challenges In Europe 2BioClinica Teams With Pharma To Tackle Clinical Trial Challenges In Europe 3Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 2Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 3Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 4Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 2Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 3Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 4Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 5Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 6Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 2Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 3Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 4Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 5Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 6Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 7Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 8Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 9Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 10Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 11Aptose Biosciences reports results for the quarter and seven months ended December 31, 2014 12
Cached News: