Sentences with phrase «tadpoles metamorphose»

Then, after three months, tadpoles metamorphose into frogs.

Not exact matches

While some of the metamorphoses that DO occur in nature, eg caterpillar into butterfly or tadpole into frog, are as spectacular or arguably even more spectacular than your fish to frog morph, the simple fact is that evolution doesn't happen to individual organisms.

I had previously suspected that some tadpoles are late undergoing metamorphosis, but this one really missed the boat.

It is the only land vertebrate where the male becomes pregnant, carrying and brooding tadpoles inside its vocal sac until they metamorphose and are spat out as baby frogs.

The study consisted of an experiment developed in the Centre for Environmental Biology in Grândola (Portugal), where the larvae of the five populations were raised from tadpoles to metamorphosis in the presence or absence of the red swamp crayfish.

The period when tadpoles are turning into frogs — called metamorphosis — is a «very vulnerable time,» said Louise Rollins - Smith, an associate professor of pathology, microbiology and immunology at Vanderbilt University who did not participate in the study.

Because of this lapse, WatchFrog is targeting its tests to OECD guidelines, which define hormone disruptors as chemicals that can disrupt the ability of a fish to produce eggs or change sex or prevent a tadpole from metamorphosing.

Pools were surveyed three times a year to coincide with the various life stages of the toad: late spring for adult toads and eggs, early to mid-summer for tadpoles, and late summer for newly metamorphosed individuals.

«If you don't have the right kind of pool habitat for adults to select for breeding or to sustain the development of tadpoles through metamorphosis, it doesn't matter how hard you work to save the species.»

To understand TH, director emeritus Donald Brown studies one of the most dramatic roles of the hormone, the control of amphibian metamorphosis — the process by which a tadpole turns into a frog.

It turned out that the amount and diversity of poisons were high in eggs, then decreased through tadpole life, then started to increase again after metamorphosis (when the tadpole turned into a small toad).

Alex Richter - Boix, Gustavo A. Llorente & Albert Montori — 2006 (2)([email protected]) Keywords: habitat desiccation, metamorphosis, morphology, phenotypic plasticity, tadpoles

Frogs can stay in the tadpole stage of development for extended periods of time if environmental conditions aren't right for their metamorphosis to continue.