Tag: mutation

Farm Chemicals Mixing Up Toads’ Sex

  • A study finds farm fields may not be the best environment for toads (Photo courtesy of the US Fish and Wildlife Service)

A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:

Transcript

A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:

This study looked at toads that live near farm fields and toads that live
near other kinds of not-so-pristine areas like parking lots.

The researchers found in areas with more agriculture – and more farm
chemicals – there were more mutant toads. They found male toads with
both male and female parts. Not ideal when it comes to mating.

Louis Guillette is an author of the study, in the journal Environmental
Health Perspectives.

“It may in fact be a mixture of chemicals along with who knows what
other variables, nutrition, other stressors, that may be leading to these
problems.”

He says next they’ll try to figure out what chemicals are at play, and
exactly how the toads are being turned into hermaphrodites.

For The Environment Report, I’m Rebecca Williams.

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A Better Bacteria for Bio-Fuel?

President Bush and others are promoting more use of plant-based
material to fuel our vehicles. Scientists say they’ve taken an
important step toward more efficient production of bio-fuels. Chuck
Quirmbach reports:

Transcript

President Bush and others are promoting more use of plant-based
material to fuel our vehicles. Scientists say they’ve taken an
important step toward more efficient production of bio-fuels. Chuck
Quirmbach reports:


Biofuel producers say they need to get a common plant sugar called
xylose to ferment to get an efficient conversion of plant material into
fuels like ethanol.


Researchers from the US Forest Products Lab and the Department of
Energy are working on the problem. They say they’ve now completed a
genetic map of a yeast that helps xylose ferment faster.


Micro-biologist Thomas Jeffries says with the new information about the
yeast, researchers plan to do more genetic tweaking:


“Well, we’ve been able to increase the specific fermentation rate of
this organism with one of our mutations, we’ve been able to increase it
by 50%, we really are aiming to get a four-fold increase.”


But Jeffries cautions there are still many steps before the work with
the yeast might pay off at your local gas station.


For the Environment report, I’m Chuck Quirmbach

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MIGRATION SEASON BRINGS BIRD FLU WORRIES (Short Version)

  • Julie Craves stands in the area where she sets up mist nets during migration to catch land birds. (Photo by Christina Shockley)

Researchers are tracking a potentially dangerous strain of avian flu in Asia, Europe, and Africa. They say the H5N1 virus could mutate and cause a human pandemic. Experts say domestic poultry or smuggled pet birds could bring the virus into the U.S. Others say it will arrive this fall by way of migratory birds. The GLRC’s Christina Shockley reports:

Transcript

Researchers are tracking a potentially dangerous strain of avian flu in
Asia, Europe, and Africa. They say the H5N1 virus could mutate and
cause a human pandemic. Experts say domestic poultry or smuggled pet
birds could bring the virus into the U.S. Others say it will arrive this fall
by way of migratory birds. The GLRC’s Christina Shockley reports:


Millions of birds will migrate across the globe along major flyways in
the coming weeks. Some birds from Asia will fly to Alaska to reach
summer nesting sites. If those birds carry the H5N1 strain of avian flu
with them, they could transmit the virus to birds that will later stop in the
United States.


Steve Schmitt is the lead veterinarian for Michigan’s Department of
Natural Resources.


“The pacific flyway far and away has the majority of birds that nest in
Alaska and then move south through the fall into Mexico.”


That means if the virus arrives in the lower 48 states via migratory birds,
it would likely arrive first in a state along the Pacific coast.


For the GLRC, I’m Christina Shockley.

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Mutant Ladybugs Control Pests

It’s nothing new to get predators to get rid of pests. The colorfuland cute ladybug, for example, loves to devour aphids, mites andmealybugs and is used by many people instead of pesticides. But workingwith these flying predators presents some problems. Now, one researchermay have a solution. The Great Lakes Radio Consortium’s Wendy Nelsonreports: