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 Fingerprint' technique spots frog populations at risk from pollution
27.03.2017 | Lancaster University

nachricht Parallel computation provides deeper insight into brain function
27.03.2017 | Okinawa Institute of Science and Technology (OIST) Graduate University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Northern oceans pumped CO2 into the atmosphere

27.03.2017 | Earth Sciences

Fingerprint' technique spots frog populations at risk from pollution

27.03.2017 | Life Sciences

Big data approach to predict protein structure

27.03.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>