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The altitudes of the Andes reveal an incessant number of new frogs
27 March 2018 9:00
Adeline Marcos

The Andes mountain range hides many biological treasures between its altitudes. One of them is the great diversity of frogs that is coming to light little by little thanks to the work of a Spanish researcher, among others. The biologist has discovered many new amphibian species in the last decade, including a new genus. Its latest finding is that of a small brown frog in the Cordillera Real de los Andes of Bolivia, which due to its limited distribution area should be considered 'vulnerable'.

A virus lethal to amphibians is spreading across Portugal
8 March 2017 10:30
Eva Rodríguez

A new strain of ranavirus is currently causing mass mortality in several species of amphibian in the Serra da Estrela, the highest mountain range in continental Portugal. This infectious agent is hypervirulent and also affects fish and reptiles, which complicates the situation, according to a study boasting the collaboration of the National Museum of Natural Sciences in Madrid.

Frog and toad larvae become vegetarian when it is hot
2 November 2016 9:36
SINC

Climate change is currently one of the greatest threats to biodiversity, and one of the groups of animals most affected by the increase in temperature is amphibians. A team of scientists with Spanish participants studied how heat waves affect the dietary choices of three species of amphibian found on the Iberian Peninsula: the European tree frog, the Mediterranean tree frog and the Iberian painted frog.

The pool frog adapts its growth to Sweden's cold temperatures
5 April 2016 10:04
SINC

Pool frog (Pelophylax lessonae) tadpoles have the amazing ability to grow at different rates depending on changes in temperature. A new study has revealed that this species, which requires relatively warm environments for breeding, speeds up its capacity for growth in Sweden during the warmest time of the year in order to take full advantage of short periods of high temperatures. This trait may be the key to this frog's survival in cold climates.

Female frogs modify offspring development depending on reproduction date
29 October 2014 10:18
SINC

Global warming is altering the reproduction of plants and animals, notably accelerating the date when reproduction and other life processes occur. A study by the University of Uppsala (Sweden), including the participation of Spanish researcher Germán Orizaola, has discovered that some amphibians are capable of making their offspring grow at a faster rate if they have been born later due to the climate.

Frogs have developed rapid defences against the red swamp crayfish
8 July 2014 9:32
SINC

The common frog is one of the amphibians with the highest distribution in the Iberian Peninsula. It reproduces preferably in permanent areas of water where it comes into contact with the red swamp crayfish, which preys on its larvae. Research carried out by the Spaniard Germán Orizaola from the University of Uppsala (Sweden) confirms that the larvae of these frogs have developed a defensive response to the invasive species. They also have deeper tails and larger bodies if they co-exist with the crayfish.