Search Results for: Amphibians
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752 results
752 results for: Amphibians
- Earth
UV-pollutant combo hits tadpoles hard
Coincident exposure to ultraviolet light and an estrogen-mimicking pollutant severely jeopardized the chance a tadpole would reach adulthood.
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Colossal study shows amphibian woes
The largest amphibian data set ever crunched—936 populations in 37 countries—confirms global declines.
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Salamander moms use bacteria to save eggs from fungi
Salamander skin has bacteria that repel egg-destroying mold.
- Earth
Sexual Hang-Up: Fish hormones change when oxygen is scarce
Oxygen deprivation—an escalating problem in freshwater ecosystems worldwide—tampers with sex hormones in carp and might underlie the decline in some fish and amphibian species.
- Animals
Strange Y chromosome makes supermom mice
An otherwise rare system of sex determination has evolved independently at least six times in one genus of South American mice.
- Ecosystems
Risky High Life: Mountain creatures prove extra-vulnerable
Some of the species hardest hit by climate change will be those living in particular mountain highlands.
- Paleontology
Fossils of early salamanders found
A recent discovery of fossilized salamanders pushes back a milestone in amphibian evolution by more than 100 million years.
- Earth
More Frog Trouble: Herbicides may emasculate wild males
New studies of male frogs in the wild link trace exposures to common weed killers with partial sex reversal.
- Animals
New frog-killing disease may not be so new
The skin disease that savaged amphibians in remote wildernesses in the 1990s has been linked to outbreaks in the 1970s.
- Earth
Feminized Frogs: Herbicide disrupts sexual growth
At concentrations currently found in water, the widely used weed killer atrazine hormonally strips male frogs of their masculinity and may be partly responsible for global amphibian declines.
- Health & Medicine
Making the optic nerve sprout anew
A compound made during inflammation, a natural reaction to injury, can induce optic nerve regeneration in a lab-dish concoction including rat retinal ganglion cells.
- Animals
Pesticides Mess with Immunity: Double whammy promotes frog deformities
Agricultural pollutants may conspire with parasites to cause the epidemic of limb deformity that's sweeping through North America's frog populations.
