Navigation Links
Thriving hybrid salamanders contradict common wisdom
Date:9/26/2007

A new UC Davis study not only has important findings for the future of California tiger salamanders, but also contradicts prevailing scientific thought about what happens when animal species interbreed.

The study, by former UC Davis doctoral student Benjamin Fitzpatrick (now on the faculty of University of Tennessee, Knoxville) and professor Bradley Shaffer, was published recently in the Proceedings of the National Academy of Sciences' online edition.

The salamander experts studied the survival rates and genetic makeup of three types of salamanders: native California tiger salamanders (Ambystoma californiense), which are protected under the U.S. Endangered Species Act; barred tiger salamanders that were introduced in California from Texas in the 1950s (Ambystoma tigrinum mavortium); and the hybrid offspring born when the two species mated.

They found that more of the hybrid young survived in the wild than did young of the native or the introduced species -- quite a surprise, since animal hybrids are usually less fit than their parents ("hybrid vigor" is largely limited to plant crosses).

That raises difficult questions for managing endangered native salamander populations, Shaffer said. Some conservationists might say that hybrids are an acceptable change, since they are favored by natural selection, and "improve" the original species. Others might consider hybrids to be genetically impure and regard them as threats to the native salamanders, their competitors and their prey.

Such questions will arise more frequently, Shaffer said, as humans both create new opportunities for hybridization with introduced species, and improve the genetic analyses that detect them.


'/>"/>

Contact: Brad Shaffer
hbshaffer@ucdavis.edu
530-752-2939
University of California - Davis
Source:Eurekalert

Page: 1

Related biology news :

1. Hybrid grass may prove to be valuable fuel source
2. Agilent Technologies Introduces First Commercial Mouse Microarray for Comparative Genomic Hybridization Research
3. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
4. New hybrid virus provides targeted molecular imaging of cancer
5. Ring-like formations in drying DNA drops could affect hybridization studies
6. Study provides new understanding of spontaneous hybridization
7. Geneticists discover genes that make fruit fly hybrids sterile
8. Hybrid molecule causes cancer cells to self-destruct
9. Elusive salamanders have role in developing new sampling models
10. Salamanders suffer delayed effects of common herbicide
11. Its not all genetic: Common epigenetic problem doubles cancer risk in mice
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/12/2017)... and PUNE, India , January 12, 2017 ... Forecasts, 2015 - 2022," projects that the global biometric technology market is expected to ... 2016 to 2022. Continue Reading ... ...      ...
(Date:1/6/2017)... JOLLA, Calif. , Jan. 6, 2017 /PRNewswire/ ... 1 safety studies in healthy volunteers of a ... intended to treat acute pancreatitis. ... is typically a mild disorder, but can be ... organ failure and sepsis, where extended hospital stays, ...
(Date:1/4/2017)... LAS VEGAS , Jan. 4, 2017  For the thousands of ... , a global leader in connected health and biometric measurement devices and ... pressure monitors. On display in A&D Medical,s special CES ... monitors represent the ongoing expansion of the company,s WellnessConnected product ... ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... ... January 19, 2017 , ... FireflySci Inc. is a go-getter type of company ... is accounted to two main factors. The first is the amazing customer service ... supplying FireflySci products all around the world. , 2016 was a tremendous sales year ...
(Date:1/19/2017)... , Jan. 18, 2017 BD (Becton, Dickinson and Company) ... today that it will host a live webcast of its Annual ... (ET). The webcast can be accessed from the ... replay through Tuesday, January 31, 2017. ... About BD BD is a global ...
(Date:1/18/2017)... 18, 2017   Parent Project Muscular Dystrophy (PPMD) ... Duchenne muscular dystrophy (Duchenne) , today announced a ... Institute of Technology (NJIT) and Talem Technologies (Talem) as ... technology to assist people living with Duchenne. PPMD ... – an embedded computer, software, a force sensor and ...
(Date:1/18/2017)... ... 2017 , ... MYOLYN, which creates medical technology for people ... to the FDA, requesting clearance of the MyoCycle Home and the MyoCycle Pro ... , The submission marks a major milestone for the technology startup. MYOLYN spun ...
Breaking Biology Technology: