Navigation Links
Risk management in fish: How cichlids prevent their young from being eaten
Date:3/19/2013

The phenomenon of adoption has taxed the minds of evolutionary scientists since Darwin first came up with his account of natural selection. According to Richard Dawkins's description, adoption is "a double whammy. Not only do you reduce, or at least fail to increase, your own reproductive success, but you improve someone else's." So why are animals apparently so willing to take care of young that are not related to them?

Franziska Schaedelin and colleagues at the Konrad Lorenz Institute of the University of Veterinary Medicine, Vienna now shed interesting light on the problem. The researchers are investigating a small cichlid fish that lives in Lake Tanganyika in southern Africa. The species is monogamous and pairs construct nesting caves to protect their eggs and fry from predators. By diving 12 meters to the lake floor, the scientists were able to collect DNA samples from over 350 parents and fry from over 30 nests. Sophisticated genetic techniques were then applied to investigate the parentage of fry in individual nests.

Most nests were found to contain fry that were unrelated to both "parents", with some nests containing fry produced by several pairs of parents. Because the locations of the nests were known, the scientists were able to show that fry had been born in nests that were separated by less than one metre to over 40 metres from their adoptive nests. Although very small fry may be able to swim several metres to a new cave without being eaten, it is highly unlikely that they could travel much longer distances. Instead it is probable that they were carried to new nests in the mouths of their parents, a mode of transport that is known to occur in cichlids. Transporting the fry to fairly distant nests would ensure that some young are protected even if all the nests in the immediate neighbourhood are predated or destroyed, so it is easy to rationalize why parents should do this. But why should other fish be willing to adopt f
'/>"/>

Contact: Dr. Richard Wagner
richard.wagner@vetmeduni.ac.at
43-148-909-15831
University of Veterinary Medicine -- Vienna
Source:Eurekalert

Page: 1 2

Related biology news :

1. New study compares diets for weight management in obese children
2. Slug ecology and management in no-till field crops
3. An integrated pest management program for coffee berry borer in Colombia
4. Approach to diabetes self-management too narrow, study suggests
5. Bark beetle management and ecology in southern pine forests
6. Workshop to focus on conservation management and climate change
7. Measuring progesterone receptor expression to improve hormone-receptor-positive cancer management
8. Aware Provides Biometrics Software and Services for Three Large-Scale Border Management Systems
9. Higher pain tolerance in athletes may hold clues for pain management
10. Validity CTO to Present Natural ID Solutions for Improving Mobile Risk Management and User Experience at NFC Solutions Summit 2012
11. New HealthFocus® International Study Reveals Five Very Different Weight Management Consumers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)... 2014 Research and Markets ... of the "The Global Watermarking and ... http://photos.prnewswire.com/prnh/20130307/600769 ... of the global digital media watermarking and ... monitor piracy by securely and invisibly embedding ...
(Date:12/19/2014)... DUBLIN , Dec. 18, 2014 Research ... announced the addition of the "iPhone 5S ... Technology Report" report to their offering. ... Following the acquisition of AuthenTec in July 2012, ... iPhone 5S. It is currently the only device ...
(Date:12/19/2014)...  23andMe, Inc., the leading personal genetics company, today ... differences in genetic ancestry of individuals from across ... immigrants first arrived more than four hundred years ago, ... as a meeting place for peoples from different continents. ... mixing of peoples with African, European, and American origins ...
Breaking Biology News(10 mins):The Global Watermarking and Fingerprinting Markets 2iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... that it was published in the Medical Hypotheses journal, ... analysis based on animal studies suggests that showering in ... permanent effects on the nervous system. The damage may ... the Environmental Protection Agency, according to researchers from Wake ...
... female monkeys at the Tulane National Primate Research Center ... anti-viral agents in a vaginal gel protect the animals ... microbicide using compounds that inhibit the processes by which ... provide a safe, effective and practical way to prevent ...
... Global Information System will provide valuable information for assessing ... of Environmental Health Sciences (NIEHS), one of the National ... most up-to-date data to public health and safety workers ... as well as demographic information for local populations. ...
Cached Biology News:Does manganese inhaled from the shower represent a public health threat? 2Does manganese inhaled from the shower represent a public health threat? 3Vaginal gel may provide a new approach to HIV prevention 2FDA approves child-friendly AIDS medicine 2
(Date:12/24/2014)... NEW YORK , Dec. 23, 2014  NeuroLifeSciences ... of mazindol in children with attention deficit/hyperactivity disorder published ... 2014 . The paper, titled "Pilot ... deficit/hyperactivity disorder" ( Konofal et al, Drug ... 2014 ) shows that mazindol might be an ...
(Date:12/22/2014)... 22, 2014  Alternative Energy & Environmental Solutions, ... signed a letter of intent to acquire BioTechPharma ... patented a nanotechnology-based development platform used to create ... rapid on-site collection and testing to identify infectious ... in an immediate, non-invasive and cost-effective manner. ...
(Date:12/22/2014)... (PRWEB) December 22, 2014 ITRA Global, ... and occupiers of commercial real estate, has further expanded ... offices in Perth and Brisbane, Western Australia, reports Mylinda ... directors. , ITRA Global / ACORPP (Australian Corporate ... independent consultancy company providing property services to a wide ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one of ... Nick Maroulis, Pharm.D. to the newly created position of ... this position, Dr. Maroulis will continue to manage the ... our multi-site pharmacies as the company expands. Dr. Maroulis ... time he has served in many different capacities in ...
Breaking Biology Technology:Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3ALNE Announces Intention To Acquire BioTechPharma 2ITRA Global Continues International Expansion in Perth and Brisbane, Australia 2BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2
... Coverage With Regional Perspective, PHILADELPHIA and LONDON, ... of information solutions to the worldwide,research and business ... have been added to Web of Science. The ... regional rather than,international audience by approaching subjects from ...
... Sciences, Inc. (OTC Bulletin Board: EROX) ("HPS" or "the,Company") ... year ended,December 31, 2007. For the three months ended ... decrease from revenues of $412,000,in the prior year period, ... as compared with a net income of $66,000 ($.02 ...
... N.Y., March 31 Chem Rx,Corporation (OTC Bulletin ... pharmacy services, announced today that it will hold ... discuss 2008 outlook,on April 1, 2008 at 8:30 ... and Steven C. Silva, President and Chief Operating,Officer, ...
Cached Biology Technology:Thomson Scientific Begins Expansion of Web of Science 2Human Pheromone Sciences Announces Quarterly and Full Year Results 2Human Pheromone Sciences Announces Quarterly and Full Year Results 3Human Pheromone Sciences Announces Quarterly and Full Year Results 4Chem Rx Corporation Schedules Conference Call to Review Full Year 2007 Financial Results 2
Anti-MMP-19 (RASI), carboxy terminal region; rabbit host...
Sheep polyclonal to hCG beta core fragment ( Abpromise for all tested applications). Antigen: Full length native protein (purified) from human urine. Entrez GeneID: 1082 Swiss Protein ID...
Evolutionarily conserved signaling intermediate in Toll pathway...
Anti-MMP-25 (Membrane-type MMP-6, Mt6MMP), hinge region; rabbit host...
Biology Products: