Future

Humans Are Eating Frog Species Into Extinction

Humans Are Eating Frog Species Into Extinction

Some one billion frogs are gobbled up each year. Around since the dinosaurs, some frog species are nearing extinction, warns a leading German biologist.

(Tom Harding)

Anita Pöhlig,

BRAUNSCHWEIG - The diversity of frog species is rich and vast. Some weigh six pounds, others are smaller than a thumbnail, there are frogs of an inconspicuous gray shade and others that light up in the most vibrant colors - in sum, more than 6,000 species of frogs are known to mankind. Miguel Vences knows almost all of them.

"Frogs were already jumping around with the dinosaurs," says Professor Vences, a biologist at the Technical University of Braunschweig in Germany, and one of the world's leading researchers of these croaking amphibians.

For the past 250 million years, frogs have managed to survive on their own. But today, amphibians in many countries are seriously threatened with extinction. "In France and Belgium, but also in the United States, frog legs can still be found on many menus. To support that luxury, many frog habitats are being destroyed in Asia," Vences says.

In China and elsewhere in Asia, frogs have now become a source of food, while the threat of famine in Africa has helped introduce frog into eating habits there. Vences estimates that more than a billion frogs are eaten every year worldwide.

In addition, a dangerous fungus has begun to attack the skin of frogs in recent years, causing many populations to die out. It is still unclear, however, whether it is the chytrid fungus that is directly causing frogs to die in such great numbers, or whether these animals are dying due to other stresses on their environment or their resulting immune system failures. "This fungus is also present in Germany, but our frogs do not seem to be suffering from it on a large scale," explains Vences.

"I started looking for frogs in ponds as a kid," recalls Vences. At that time, scientists did not yet know many frog species. Vences and his colleague Frank Glaw alone have discovered and scientifically named some 100 species.

The two have conducted research together since the 1980s - when they were still students - primarily in the jungles of Madagascar. Vences and Glaw have published a list of the more than 350 frog species that live on the small African island.

The diversity of frogs can also be seen in reproduction. "Some undergo live births, others lay eggs. Some frogs even swallow their eggs and hatch them out through their stomach," explains Vences.

One species places tadpoles individually on water-filled leaves and feeds them with unfertilized eggs. In order to mate, frogs identify each other by the sound of their croaking as well as by their color.

"Despite all of this, frogs are actually pretty stupid. All of these incredible practices are controlled by instinct," says Vences. "Because amphibians have survived for so long, they are an important model group for evolutionary research."

Read the original article in German

Keep up with the world. Break out of the bubble.
Sign up to our expressly international daily newsletter!
Society

A Mother In Spain Denied Child Custody Because She Lives In Rural Area

A court in Spain usurps custody of the one-year-old boy living with his mother in the "deep" part of the Galicia region, forced to instead live with his father in the southern city of Marbella, which the judge says is "cosmopolitan" with good schools and medical care. Women's rights groups have taken up the mother's case.

A child in Galician countryside

Laure Gautherin

A Spanish court has ordered the withdrawal of a mother's custody of her one-year-old boy because she is living in the countryside in northwestern Spain, where the judge says the child won't have "opportunities for the proper development of his personality."

The case, reported Monday in La Voz de Galicia, has sparked outrage from a women's rights association but has also set off reactions from politicians of different stripes across the province of Galicia, defending the values of rural life.


Judge María Belén Ureña Carazo, of the family court of Marbella, a city on the southern coast of 141,000 people, has ordered the toddler to stay with father who lives in the city rather than with his mother because she was living in "deep Galicia" where the child would lack opportunities to "grow up in a happy environment."

Front page of La Voz de Galicia - October 25, 2021

Front page of La Voz de Galicia - Monday 25 October, 2021

La Voz de Galicia

Better in a "cosmopolitan" city?


The judge said Marbella, where the father lives, was a "cosmopolitan city" with "a good hospital" as well as "all kinds of schools" and thus provided a better environment for the child to thrive.

The mother has submitted a formal complaint to the General Council of the Judiciary that the family court magistrate had acted with "absolute contempt," her lawyer told La Voz de Galicia.

The mother quickly accumulated support from local politicians and civic organizations. The Clara Campoamor association described the judge's arguments as offensive, intolerable and typical of "an ignorant person who has not traveled much."

The Xunta de Galicia, the regional government, has addressed the case, saying that any place in Galicia meets the conditions to educate a minor. The Socialist party politician Pablo Arangüena tweeted that "it would not hurt part of the judiciary to spend a summer in Galicia."

Keep up with the world. Break out of the bubble.
Sign up to our expressly international daily newsletter!
THE LATEST
FOCUS
TRENDING TOPICS
MOST READ