Tadpoles found to jump on backs of unknown adults to escape cannibalistic siblings

May 15, 2017 by Bob Yirka report
Poison frog tadpoles seek parental transportation to escape their cannibalistic siblings. Credit: The Journal of Zoology

A pair of researchers, one with Vrije Universiteit Brussel and the other Trier University in Germany has found that splash-back poison frog tadpoles willingly seek out any adult that comes near them to escape their cannibalistic siblings. In their paper published in Journal of Zoology, Lisa Schulte and Michael Mayer describe their study of the tadpoles in a field laboratory they set up in northeastern Peru, what they found, and why they believe the tadpoles behave as they do.

Splash-back poison frog females lay their eggs, as the researchers note, in plants that rise above the water line. When the offspring hatch as tadpoles, they drop down into a small pool of water where they soon begin to turn on one another if they are not moved elsewhere. Normally, the father shows up and bends his backside down low to allow one or two of his offspring to climb aboard. He then makes his way to a different pool where the tadpoles are released. The father makes such trips until his little ones are dispersed. But, as the researchers also note, sometimes a father, for unknown reasons, chooses to ignore his , leaving the tadpoles to begin eating one another until a single one is left. Sometimes, though, the research pair found, a who is not the father will make its way into the pool and the tadpoles will swim toward it hoping to hop aboard for transport elsewhere. To learn more about such behavior, the researchers collected multiple clutches of tadpoles and placed them in where they could be studied and filmed when fathers, other males, other females and even frogs of other species were introduced into the pool.

The researchers report that all of the tadpoles swam toward an adult regardless of its gender—even those of another species. Many of them attempted to hop on the back of the adult and two of them actually succeeded. They were not fooled by 3-D printed frogs, however; none of the tadpoles swam toward them. The researchers conclude that the are more than willing to try to escape their siblings by almost any means necessary when their father fails to separate them.

Explore further: Frog fathers don't mind dropping off their tadpoles in cannibal-infested pools

More information: L. M. Schulte et al. Poison frog tadpoles seek parental transportation to escape their cannibalistic siblings, Journal of Zoology (2017). DOI: 10.1111/jzo.12472

Related Stories

Female frogs identify own offspring using inner GPS

March 15, 2016

The ability to recognize own offspring and provide preferential care is difficult for the poison frog Allobates femoralis. According to a study conducted by Vetmeduni Vienna, male and female frogs have different strategies ...

Japanese tadpoles relax in hot springs

July 26, 2016

Japanese tadpoles can live and grow in natural hots springs, or onsen, with water temperatures as high as 46.1oC (115oF). Living in onsen may benefit the tadpoles' immune systems, speed their growth, and allow the tadpoles ...

Recommended for you

The astonishing efficiency of life

November 17, 2017

All life on earth performs computations – and all computations require energy. From single-celled amoeba to multicellular organisms like humans, one of the most basic biological computations common across life is translation: ...

Unexpected finding solves 40-year old cytoskeleton mystery

November 17, 2017

Scientists have been searching for it for decades: the enzyme that cuts the amino acid tyrosine off an important part of the cell's skeleton. Researchers of the Netherlands Cancer Institute have now identified this mystery ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.