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:9/18/2014)... probably the ultimate form of camouflage: you don,t just ... strategy is not as uncommon as you might think. ... USA, explains that the larval life stages of many ... of the anatomy that most creatures cannot make transparent. ... to shield each individual eye unit with an opaque ...
(Date:9/17/2014)... From accessible and affordable health care to reproductive ... depend on the ability of people to identify ... openly and respectfully, and find the most defensible ... practices to support these societal conversations?, The Hastings ... of Bioethical Issues have teamed up to publish ...
(Date:9/17/2014)... student have designed a device based on a shorebird,s ... dew., The device could provide water in drought-stricken areas ... Luo, professor in the Mechanical & Aerospace Engineering Department, ... of Engineering department, published "Bioinspired Plate-Based Fog Collectors" in ... Applied Materials & Interfaces journal. ...
Breaking Biology News(10 mins):Transparent larvae hide opaque eyes behind reflections 2Why bioethics literacy matters 2Why bioethics literacy matters 3Shorebird's beak inspires UT Arlington research on water collection 2
... - Eurofins MWG Operon, an expert in next generation sequencing ... libraries for sequencing with Roche GS FLX or Illumina HiSeq ... long paired end (LPE) libraries with different jumping distances (3 ... After sequencing, the resulting reads are assembled into large contigs ...
... of a TB Vaccine PDP, An Exhibitor,s Workshop at the ... 1:00-2:00 PM VENUE: 2011 AAAS ANNUAL MEETING, ,WASHINGTON CONVENTION ... an overview of the state of the global TB epidemic ... product development partnerships such as Aeras; and ways that scientists ...
... found attached to the foot of an ancient Egyptian mummy ... parts, says the scientist who tested replicas on volunteers. ... a three-part wood and leather artefact housed in the Egyptian ... Chester artificial toe on display in the British Museum, not ...
Cached Biology News:Mummies' false toes helped ancient Egyptians walk 2
(Date:9/18/2014)... Pipette.com announces brand new ... and AccuPet brand of pipettes. Micropipettes are ideal ... less and are a great tool for molecular ... The micropipette promotions were designed to offer a ... to help customers find the right solution. Brands ...
(Date:9/17/2014)... A long-term retrospective study of breast ... via interstitial brachytherapy suggests that women younger than ... be suitable to receive the treatment. Current American ... patients in the "unsuitable" category for APBI. In ... Beaumont Health System,s Peter Y. Chen , ...
(Date:9/17/2014)... and PRINCETON, N.J. , ... OTCQB:AEMD), the pioneer in developing targeted therapeutic devices to ... its diagnostic subsidiary, Exosome Sciences, Inc. (ESI), disclosed today ... Exosomes & SingleCell Analysis Summit. On September ... Sciences will give a presentation entitled: "Exosomes: A Multiplexed ...
(Date:9/17/2014)... (PRWEB) September 17, 2014 JH ... California showroom located in Irvine. JH Technologies, a ... imaging systems, recently announced an expanded partnership with Leica ... leading microscopes and image analysis solutions will be featured ... 2nd. The new showroom facility is located within ...
Breaking Biology Technology:Major Pipette Distributor Pipette.com Announces Promotions on Sartorius/Biohit, Socorex, Capp, and AccuPet Micropipettes 2Major Pipette Distributor Pipette.com Announces Promotions on Sartorius/Biohit, Socorex, Capp, and AccuPet Micropipettes 3Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 2Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 3Partial Breast Irradiation With Interstitial Brachytherapy Appears Appropriate For Women Previously Considered Unsuitable 4Aethlon Medical and Exosome Sciences To Present at the Exosomes & SingleCell Analysis Summit 2Aethlon Medical and Exosome Sciences To Present at the Exosomes & SingleCell Analysis Summit 3JH Technologies displays newest microscope imaging technology at Southern California showroom grand opening 2JH Technologies displays newest microscope imaging technology at Southern California showroom grand opening 3
... SAN DIEGO, Dec. 13 Neurocrine Biosciences,Inc. (Nasdaq: ... at its San Diego campus, as a part of ... and associated costs,and expenses after the setback on indiplon. ... "It is with great disappointment that we have to ...
... with drug-eluting,stents must take a combination of aspirin ... year, and possibly longer, after stent,implantation. This is ... today in the journals of the Society for ... (ACC), and,American Heart Association (AHA). To access the ...
... /Xinhua-PRNewswire/ -- Sinovac Biotech Ltd. (Amex:,SVA), a leading ... it has,notified the Listing Qualifications Department at the ... 2007 annual stockholders meeting,to no later than April ... 2007 annual stockholders meeting,in August 2007. The meeting ...
Cached Biology Technology:Neurocrine Announces Work Force Restructuring 2Neurocrine Announces Work Force Restructuring 3PCI Guideline Update Stresses Long-Term Anticoagulant Therapy After Treatment With Drug-Eluting Stents 2PCI Guideline Update Stresses Long-Term Anticoagulant Therapy After Treatment With Drug-Eluting Stents 3PCI Guideline Update Stresses Long-Term Anticoagulant Therapy After Treatment With Drug-Eluting Stents 4Sinovac Requests Extension for Annual Shareholders Meeting 2
... Rabbit polyclonal to Kv4.2 Immunogen ... KLH, corresponding to amino acids 23-43 of ... Cross-reacts with Rat.Expected to cross-react with Human ... with immunogen), Rabbit (100% identity with immunogen) ...
... 2 Alzheimer's disease (AD) patients with ... mutations in the presenilin proteins (PSEN1; PSEN2) ... disease-linked mutations result in increased production of ... of amyloid deposits found in AD brains). ...
See product name for description....
2'-Fluorine-CTP (2'-F-CTP) is readily incorporated into transcripts by T7 and SP6 R&DNA™ Polymerase and is available separately....
Biology Products: