Navigation Links
Fish can determine their social rank by observation alone, study finds

uld he use that knowledge to make logical decisions about the same fish paired in new relationships?

To find out, eight different bystanders were tested in the familiar square tank and in a new setting--a rectangular aquarium with three adjacent compartments. In each test, a bystander was placed in the middle compartment between two sets of rivals that he had never seen together--A and E (AE), and B and D (BD). At this point in the experiment, all the rivals had recovered from earlier losses, so their physical appearance was similar, right down to the eyebar. From the point of view of the bystander, therefore, each rival looked like a winner.

Using a video camera, researchers recorded which rival the bystander approached first, and the overall time he spent next to each of them. "Previous experiments in A. burtoni and other fish have shown that time spent in tank quadrants adjacent to a particular male indicates bystander 'preference,' and that bystanders spend more time near the rival they perceive to be weaker," the authors explained.

Losers and winners

The results were dramatic. Virtually all of the bystanders swam to the weaker rival first and stayed near him for a significantly longer period of time. In the AE tests, bystanders preferred E, the wimpiest of all the losers, over A, the top fish in the tank. In the more subtle BD tests, most bystanders chose D over B, even though these two rivals were ranked very close together on the dominance hierarchy.

"These results show that fish do, in fact, use transitive inference to figure out where they rank in the social order," Fernald said. "I was amazed that they could do this through vicarious experience, just by watching other males fight. In Lake Tanganyika, where conditions change all the time, it would be advantageous for a male to know who the new boss is going to be and who his weakest rivals are. Our experiment shows that male cichlids can actuall
'"/>

Source:Stanford University


Page: 1 2 3 4

Related biology news :

1. Newly-discovered class of genes determines ?and restricts ?stem cell fate
2. Biologists determine genetic blueprint of social amoeba
3. USC researchers determine mechanism of action of chemotherapy drug
4. Hidden sponges determine coral reefs nutrient cycle
5. Weapon performance determines mating success in the collared lizard
6. Scientists determine structure of enzyme that disrupts bacterial virulence
7. New technique helps researchers determine amino-acid charge
8. Researchers unlock how cells determine their functions
9. Researchers map out networks that determine cell fate
10. Genetic tug of war determines sexual differentiation
11. Structure determined for p53 tumor suppressor protein as bound to DNA for anti-cancer activity
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Fish can determine their social rank observation alone study finds

(Date:8/29/2014)... Some species of marine phytoplankton, such as the prolific ... vitamin B1 (thiamine), researchers have discovered. The finding contradicts ... many other eukaryotic microbes depend on scarce supplies of ... really different way to think about the ocean," says ... The ISME Journal paper with CIFAR fellows ...
(Date:8/29/2014)... of the Tibetan plateau -- the largest topographic anomaly ... both its profound effect on climate and its reflection ... GSA Bulletin , Katharine Huntington and colleagues employ a ... modern and fossil snail shells to investigate the uplift ... , Views range widely on the timing of surface ...
(Date:8/28/2014)... have identified a handful of bacterial culprits that may ... and ulcerative colitis, using patients, own intestinal immune responses ... 28 in the journal Cell . , Trillions ... plays a critical role in the development and progression ... number of bacterial species affect a person,s susceptibility to ...
Breaking Biology News(10 mins):Not all phytoplankton in the ocean need to take their vitamins 2Not all phytoplankton in the ocean need to take their vitamins 3Snails tell of the rise and fall of the Tibetan Plateau 2Snails tell of the rise and fall of the Tibetan Plateau 3Snails tell of the rise and fall of the Tibetan Plateau 4Snails tell of the rise and fall of the Tibetan Plateau 5Snails tell of the rise and fall of the Tibetan Plateau 6Snails tell of the rise and fall of the Tibetan Plateau 7Yale study identifies possible bacterial drivers of IBD 2
... coral bleaching prediction system indicates that there will be ... the event will probably not be severe. NOAA issued ... the 11th International Coral Reef Symposium in Ft. Lauderdale, ... a risk of widespread bleaching in the Northwestern Hawaiian ...
... Mass., July 10, 2008 -- The National Institutes of ... to Williams College Assistant Professor of Biology Lara D. ... or CMT. CMT is the most common inherited ... 2,500 individuals. CMT usually shows dominant inheritance and symptoms ...
... a million electrical signals pulsing through your body. At the ... the ion channel. A new study by researchers from ... a meter in ion channels. This movement is critical to ... close in response to changes in voltage across the membrane. ...
Cached Biology News:New NOAA coral bleaching prediction system calls for low level of bleaching in Caribbean this year 2Researchers catch ion channels in their opening act 2Researchers catch ion channels in their opening act 3
(Date:8/30/2014)... 2014 The Global and China ... in-depth study on the current state of the ... , The report provides a basic overview of ... structure. Global market analysis and Chinese domestic market ... developments, trends and competitive landscape of the market. ...
(Date:8/29/2014)... (PRWEB) August 29, 2014 Pittcon is ... MacDonald, and colleague Koichiro Matsuda, Horiba Scientific, have organized ... September 5, 2014. JASIS , Asia’s largest analytical ... 2014, in Makuhari Messe, Japan. , The four ... for Bioanalysis from Single Molecules to Single Cells” will ...
(Date:8/29/2014)... (PRWEB) August 29, 2014 A major ... the biotech start-up dense realm of Boston-Cambridge, is gaining ... able investors. James Sherley, the Director of Boston’s Adult ... the local and national visibility of his company an ... 2013. , In addition to a social media marketing ...
(Date:8/28/2014)... Lawrence, MA (PRWEB) August 28, 2014 “This ... single test to screen from 0 to 150 ppb,” said ... test is a significant benefit to plant owners and USDA-GIPSA ... corn and other commodities. Testing can take place in a ... Not only can the plant test the feed and grain ...
Breaking Biology Technology:Electrical Insulating Varnish Market World, China Regional Analysis & 2020 Forecasts Available at DeepResearchReports.com 2Electrical Insulating Varnish Market World, China Regional Analysis & 2020 Forecasts Available at DeepResearchReports.com 3Fifth Annual U.S. Symposium at JASIS Organized by Pittcon’s Program Chairman Hub MacDonald 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4
... nation combats an,alarming rise in chronic diseases, the ... a new report on the next,generation of medicines ... patients., The report found that America,s pharmaceutical ... Michigan - are,testing a record 633 new biotech ...
... ... Bioprocess Industry, ELKTON, Md., ... -- an online interactive design tool that,provides step-by-step instructions for ... STA-PURE(SM) Bioprocess Configurator is unique to the,bioprocess industry. Available at ...
... on Track, SAN MATEO, Calif., Sept. 24 ... company focused on developing and,commercializing novel pain management ... to the European Medicines Agency,s (EMEA) Day 120,questions ... in peripheral neuropathic pain., NeurogesX, MAA for ...
Cached Biology Technology:New Report on 633 Biotechnology Medicines Under Development Released in Michigan 2New Report on 633 Biotechnology Medicines Under Development Released in Michigan 3Gore's Legacy of Innovation Extends From Products to Processes 2Gore's Legacy of Innovation Extends From Products to Processes 3NeurogesX Responds to EMEA's Day 120 Questions 2NeurogesX Responds to EMEA's Day 120 Questions 3
Human RXR beta/NR2B2 MAb (Clone H7341) Keywords: RXRbeta, RXRbeta, Retinoid X Receptor beta...
PSMD1 Antibody...
Terrific Broth, 1 kg. Mixture of casein peptone, yeast extract, K2HPO4, and KH2PO4.Used at 47 g/l for E. coli growth with higher cell densities. Category: Nucleotides & Enzymes & Biochemicals, Ultrap...
... 1200L sets the new standard for ... incorporating the latest technologies and providing ... analytical needs. The Atmospheric Pressure ... Quadrupole Analyzer provide superior selectivity and ...
Biology Products: