Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Brooding fishes take up nutrients from their own children

08.12.2009
In the pipefish, the male cares for the offspring.
Apart from the ones he sucks the life out of.
The discovery of filial cannibalism in the pipefish is now creating a stir in the research world.

The pipefish, which is related to the seahorse, has an unusual way of organising childcare. In this fish species it is the father who takes care of the eggs, which he receives from one or more females and then looks after in a brood pouch on the tail, where a kind of male equivalent of the placenta provides the embryos with oxygen and nutrients.

Embryos disappearing
But the pipefish is not as caring as it might be. Some embryos disappear during the brooding process.

The disappearing embryos have long been a mystery to research scientists, who have speculated that other embryos may possibly absorb them. Now Gry Sagebakken and her colleagues have discovered that it is not a case of sibling cannibalism, but of filial cannibalism.

Draw nutrients
In their study published in the scientific journal Proceedings of the Royal Society, the doctoral student and her research colleagues at the Department of Zoology of the University of Gothenburg have shown that the father pipefish does not just use his "placenta" to provide nutrients - he also uses it to draw nutrients from his own children. The result is that the embryos quite simply disappear.
Radioactive eggs
Filial cannibalism in the pipefish was discovered in an experiment in which the research scientists labelled the females' eggs with radioactive nutrients. The radioactively labelled eggs could then be tracked using special instruments which registered how the nutrients moved from the embryos into the brood pouch and furthermore into the body of the male pipefish.

"The male has about 100 embryos in its brood pouch, and anything from zero to all the eggs may be absorbed. In this way the fathers are able to use their children to improve their own well-being," says Sagebakken.

The article Brooding fathers, not siblings, take up nutrients from embryos is published in Proceedings of the Royal Society on Wednesday 25 November.

Contact:
Gry Sagebakken, doctoral student at the Department of Zoology, University of Gothenburg
+46 (0)31-786 3499
Mobile: +46 (0)707145145
gry.sagebakken@zool.gu.se

Helena Aaberg | idw
Further information:
http://www.gu.se

More articles from Life Sciences:

nachricht New photocatalyst speeds up the conversion of carbon dioxide into chemical resources
29.05.2017 | DGIST (Daegu Gyeongbuk Institute of Science and Technology)

nachricht Copper hydroxide nanoparticles provide protection against toxic oxygen radicals in cigarette smoke
29.05.2017 | Johannes Gutenberg-Universität Mainz

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Strathclyde-led research develops world's highest gain high-power laser amplifier

The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.

The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

New insights into the ancestors of all complex life

29.05.2017 | Earth Sciences

New photocatalyst speeds up the conversion of carbon dioxide into chemical resources

29.05.2017 | Life Sciences

NASA's SDO sees partial eclipse in space

29.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>