Tag: "tadpole" at biology news

News tips from the Journal of Neuroscience

...rs examined the intrinsic membrane excitability of tadpole optic tectal neurons during the period from early synapse formation (stage 42/43) to stage 49, when tectal field receptive fields become more refined. Measured sodium current amplitudes increased slightly between stage 42/43 and 4446 and then decline...

Forsyth scientists discover early key to regeneration

...llular underpinnings of regeneration. The Xenopus tadpole is an ideal model for studying regeneration because it is able to re-grow a fully functioning tail and all of its components, including muscle, vasculature, skin, and spinal cord. The Forsyth scientists studied the role that apoptosis, a process of ...

Forsyth scientists develop system for automated analysis of behavior

...aining it to remain in a particular location. Or a tadpole may be trained to move for 5 seconds whenever a bright light is applied. The device makes it easy to designate some chambers as controls (where a random or opposite relationship between stimulus and response is given) and automatically produces both ...

Time of day tempers tadpoles' response to predators

...d being eaten. But there's a trade-off. The more a tadpole eats, the faster it grows big enough to transform into a frog; yet finding food requires being active, which ups the odds of becoming someone else's dinner. Scientists have known that prey adjust their activity levels in response to predation risk...

Leptin found to control appetite and limb development in frogs

... role in the complex signaling that turns a finned tadpole into a four-legged frog, according to Robert Denve...se of leptin at various stages of development from tadpole to near adult and watched what happened. As in mice, the hormone is apparently a powerful appetite s...

Pesticide combinations imperil frogs, probably contribute to amphibian decline

...her also produced a startling effect: The longer a tadpole took to mature into a frog, the smaller it was. It's normally the other way around, Hayes said. Separately, six of the pesticides did not affect this correlation, but three disrupted it so that there was no relationship between time to metamorphosis ...

Picky female frogs drive evolution of new species in less than 8,000 years

...es and northern males failed to develop beyond the tadpole stage. Though crosses involving northern females and southern males successfully produced frogs, the offspring developed more slowly than the offspring of pairs of northern frogs. Field studies confirmed the laboratory results. Researchers could find...

MSI reveals invention for detection and precise quantification of molecules

...Dr. Ian Burbulis, a researcher at MSI, devised the tadpole molecules and is the first author of the paper. According to Dr. Burbulis, "If you want to understand the mechanistic operation of biological systems, you need to know the precise numbers of each component part found in individual cells. Tadpoles and...

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