Navigation Links
From ocean to land: The fishy origins of our hips
Date:5/14/2013

New research has revealed that the evolution of the complex, weight-bearing hips of walking animals from the basic hips of fish was a much simpler process than previously thought.

Tetrapods, or four-legged animals, first stepped onto land about 395 million years ago. This significant change was made possible by strong hipbones and a connection through the spine via an ilium - features that were not present in the fish ancestors of tetrapods.

In a study published in the journal Evolution and Development, Dr Catherine Boisvert of the Australian Regenerative Medicine Institute at Monash University, MacQuarie University's Professor Jean Joss and Professor Per Ahlberg of Uppsala University examined the hip structures of some of human's closest fish cousins.

They found the differences between us and them are not as great as they appear - most of the key elements necessary for the transformation to human hips were actually already present in our fish ancestors.

Dr Boisvert and her collaborators compared the hip development - bones and musculature - of the Australian lung fish and the Axolotl, commonly known as the Mexican Walking Fish.

The results showed that, surprisingly, the transition from simple fish hip to complex weight-bearing hip could be done in a few evolutionary steps.

"Many of the muscles thought to be "new" in tetrapods evolved from muscles already present in lungfish. We also found evidence of a new, more simple path by which skeletal structures would have evolved," Dr Boisvert said.

The researchers found that the sitting bones would have evolved by the extension of the already existing pubis. The connection to the vertebral column could have evolved from an illiac process already present in fish.

"The transition from ocean-dwelling to land-dwelling animals was a major event in the evolution of terrestrial animals, including humans, and an altered hip was an essential enabling step," Dr Boisvert said.

"Our research shows that what initially appeared to be a large change in morphology could be done with relatively few developmental steps."


'/>"/>

Contact: Emily Walker
emily.walker@monash.edu
61-399-034-844
Monash University
Source:Eurekalert

Related biology news :

1. Oceans acidifying faster today than in past 300 million years
2. Rising ocean temperatures harm protected coral reefs
3. Study by Haverford College professor reveals unprecedented impact of Deepwater Horizon on deep ocean
4. WHOI researchers, collaborators receive $1.4 million grant to study life in oceans greatest depths
5. Oceanographers develop method for measuring the pace of life in deep sediments
6. Corals could survive a more acidic ocean
7. Ocean acidification linked to larval oyster failure
8. Wind pushes plastics deeper into oceans, driving trash estimates up
9. Scientists provide first large-scale estimate of reef shark losses in the Pacific Ocean
10. First satellite tag study for manta rays reveals habits and hidden journeys of ocean giants
11. Plastic trash altering ocean habitats, Scripps study shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2017)... 20, 2017 At this year,s CeBIT Chancellor Dr. ... manufacturer DERMALOG. The Chancellor came to the DERMALOG stand together with the ... year,s CeBIT partner country. At the largest German biometrics company the two ... face and iris recognition as well as DERMALOG´s multi-biometrics system.   ... ...
(Date:3/16/2017)... 16, 2017 CeBIT 2017 - Against identity fraud with DERMALOG solutions ... ... Used combined in one project, multi-biometric solutions provide a crucial contribution against ... Used combined in one project, ... ...
(Date:3/9/2017)... Australia , March 9, 2017 4Dx ... prestigious World Lung Imaging Workshop at the University of ... was invited to deliver the latest data to world ... recognised event brings together leaders at the forefront of ... in lung imaging. "The quality of ...
Breaking Biology News(10 mins):
(Date:5/26/2017)... Linda, Ca (PRWEB) , ... May 25, 2017 ... ... to truly understanding the full process behind each occurrence. Live cell imaging using ... In this webinar, the use of automated fluorescence microscopy methods will be discussed, ...
(Date:5/24/2017)... Utah (PRWEB) , ... May 24, 2017 , ... ... the selection and implementation of CLEARAS Water Recovery’s Advanced Biological Nutrient Recovery (ABNR™) ... key component of a $24 million plant upgrade to sustainably meet current and ...
(Date:5/24/2017)... ... May 24, 2017 , ... Patient Monitoring and ... Wi-Fi connectivity to reduce the amount of wiring in a healthcare facility and ... mobile devices including infusion pumps, heart and hypertension monitoring, glucose monitoring, and other ...
(Date:5/23/2017)... , ... May 23, 2017 , ... A recent survey ... most troublesome and difficult to control weed in 12 categories of broadleaf crops, fruits ... 200 weed scientists across the U.S. and Canada participated in the 2016 survey, the ...
Breaking Biology Technology: