Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Fisheries Catch-22: Conserving biodiversity or plundering genetic diversity?

11.12.2008
What is captive breeding doing to fish populations?

Human impacts on the environment have reduced populations of wild species to dangerously low levels.

Nowhere is this more apparent than in worldwide fisheries, where thanks to overfishing and habitat destruction, countless species and populations of fish are on the brink of disappearing forever. To attempt to mitigate the dire situation, captive breeding, the controlled breeding of organisms in protected environments, is regularly initiated.

Despite its popularity, does captive breeding actually work? In the current issue of Evolutionary Applications (1:4), Dr. Dylan Fraser of Dalhousie University provides a candid look at whether these breeding programs are fulfilling their mandates.

Using salmonids (the economically crucial group of fish that include salmon and trout) to illustrate his point, Fraser questions whether captive breeding is doing more harm than good. In his comprehensive review of over 300 papers, Fraser concludes that fish reared in captivity can rapidly lose the genetic diversity needed to adapt and survive in the wild, and that the rate of loss of diversity can both vary across breeding programs and be species specific. To complicate matters further, Fraser points out that that we simply do not know how captive-bred fish will perform once released back into the wild.

Unfortunately, without captive breeding to bolster their numbers, we may soon have too few individuals from which to repopulate disappearing fish populations, leaving us essentially in a fisheries catch-22.

Fraser concludes that not only do more data on the effects of captive breeding on the genetic diversity of fishes need to be collected, but also that alternatives to captive breeding, such as the live freezing of fish sperm of diverse genetic backgrounds, or the physical relocation of fish populations from one site to another, need more serious consideration.

Finbar Galligan | alfa
Further information:
http://www3.interscience.wiley.com/journal/120126564/abstract

More articles from Ecology, The Environment and Conservation:

nachricht Wildland Fire Modeling Can Lead to Better Predictions
22.08.2014 | University of Alabama Huntsville

nachricht Marine Protected Areas Might Not Be Enough to Help Overfished Reefs Recover
22.08.2014 | Georgia Institute of Technology

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

MEDICA EDUCATION CONFERENCE: Bessere Behandlung dank Biomarker

21.08.2014 | Event News

Mathematics and Computer Science - Key Disciplines in Developing Countries as well?

20.08.2014 | Event News

5th Technical Conference "Subsoil Analysis, Ground Improvement and Wind Turbine Foundations"

13.08.2014 | Event News

 
Latest News

Marine Protected Areas Might Not Be Enough to Help Overfished Reefs Recover

22.08.2014 | Ecology, The Environment and Conservation

Study Verifies More Than 100,000 African Elephants Killed in Three Years

22.08.2014 | Studies and Analyses

Some Anti-Inflammatory Drugs Affect More Than Their Targets

22.08.2014 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>