Navigation Links
New species discovered on whale skeletons
Date:9/21/2009

When a whale dies, it sinks to the seafloor and becomes food for an entire ecosystem. Researchers at the University of Gothenburg, Sweden, have discovered previously unknown species that feed only on dead whales - and use DNA technology to show that the species diversity in our oceans may be higher than previously thought.

Dead whales constitute an unpredictable food source - it is impossible to know when and where a whale is going to die, and when it does, the food source does not last forever. Nevertheless, some marine species have specialised in feeding on whale cadavers.

Big source of nutrients

This is shown by researchers at the University of Gothenburg who have studied the ecosystem around dead whales using underwater cameras. A dead whale is an enormous source of nutrients. In fact, one cadaver offers the same amount of nutrients that normally sinks from the surface to the seafloor in 2000 years, and this is of great benefit to innumerable species: First the meat is eaten by for example sharks and hagfish, then tremendous amounts of various organisms come to feast on the skeleton.

Specialised worms

One group of animals commonly found on whale skeletons is bristleworms, which are related to the earthworm. Some bristleworm species are so specialised in eating dead whales they would have problems surviving elsewhere. One example is Osedax, which uses its root system to penetrate the whale bones when searching for food. Other species specialise in eating the thick layers of bacteria that quickly form around the bones.

Nine new species

A dissertation from the Department of Zoology at the University of Gothenburg describes no fewer than nine previously unknown species of these bacteria-grazing bristleworms.

Cryptic species

Four of the new species were found on whale cadavers placed at a depth of 125 metres in the new national park Kosterhavet off the coast of Strmstad, Sweden. The other five species feed on whale bones in the deep waters off the coast of California, USA. The family tree of bristleworms was explored using molecular data. The DNA analyses show that there are several so-called cryptic bristleworm species, meaning species that despite looking identical differ very much genetically.

Significant findings

The analyses show that the adaptation to a life on whale cadavers has occurred in species from different evolutionary paths and at several points in time. The study also shows that some species that are assumed to inhabit many different areas globally, so-called cosmopolitan species, may in fact be cryptic species. This finding may be very significant for our understanding of how animals spread around the world and of how many different species dwell on our planet.


'/>"/>

Contact: Krister Svahn
krister.svahn@science.gu.se
46-031-786-4912
University of Gothenburg
Source:Eurekalert  

Related biology news :

1. Genetic sex determination let ancient species adapt to ocean life
2. As ash borer claims more trees, researcher at ISU works for species survival
3. Species diversity helps ASU researchers refine analyses of human gene mutations
4. Global warming threatens tropical species, the ecosystem and its by-products
5. Scientists discover new species of crustacean on Lanzarote
6. Genome duplication responsible for more plant species than previously thought
7. Beautiful plumage: Feather color and sex start the species revolution
8. Red List overlooks island species
9. A global model for the origin of species independent of geographical isolation
10. Mystery E. coli genes essential for survival of many species
11. US-Mexico border wall could threaten wildlife species
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New species discovered on whale skeletons
(Date:4/26/2016)... LONDON , April 26, 2016 /PRNewswire/ ... Systems, a product subsidiary of Infosys (NYSE: ... partnership to integrate the Onegini mobile security platform ... http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The integration ... security to access and transact across channels. Using ...
(Date:4/15/2016)... April 15, 2016  A new partnership announced ... accurate underwriting decisions in a fraction of the ... priced and high-value life insurance policies to consumers ... With Force Diagnostics, rapid testing (A1C, Cotinine ... readings (blood pressure, weight, pulse, BMI, and activity ...
(Date:4/13/2016)...  IMPOWER physicians supporting Medicaid patients in ... standard in telehealth thanks to a new partnership with ... IMPOWER patients can routinely track key health measurements, such ... and, when they opt in, share them with IMPOWER ... local retail location at no cost. By leveraging this ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... DIEGO , June 24, 2016 ... more sensitively detects cancers susceptible to PARP inhibitors ... circulating tumor cells (CTCs). The new test has ... HRD-targeted therapeutics in multiple cancer types. ... targeting DNA damage response pathways, including PARP, ATM, ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... , June 23, 2016 Houston Methodist ... the Cy-Fair Sports Association to serve as their ... agreement, Houston Methodist Willowbrook will provide sponsorship support, ... connectivity with association coaches, volunteers, athletes and families. ... the Cy-Fair Sports Association and to bring Houston ...
(Date:6/23/2016)... FRANCISCO , June 23, 2016   EpiBiome ... has secured $1 million in debt financing from Silicon ... ramp up automation and to advance its drug development ... its new facility. "SVB has been an ... beyond the services a traditional bank would provide," said ...
Breaking Biology Technology: