biology

Tyrrhenian painted frog

Tyrrhenian painted frog is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tyrrhenian painted frog rather than just read about it. In short: The Tyrrhenian painted frog (Discoglossus sardus) is a species of frog in the family Alytidae (formerly Discoglossidae). Endemic to the Tyrrhenian Sea basin, it is found in a handful of Western Mediterranean islands, namely Sardinia, Corsica, and the Tuscan Archipelago.

Key takeaways

Tyrrhenian painted frog belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tyrrhenian painted frog to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tyrrhenian painted frog from memory before moving on to harder problems.

Reference excerpt

The Tyrrhenian painted frog (Discoglossus sardus) is a species of frog in the family Alytidae (formerly Discoglossidae). Endemic to the Tyrrhenian Sea basin, it is found in a handful of Western Mediterranean islands, namely Sardinia, Corsica, and the Tuscan Archipelago. A species with high stakes in terms of conservation, it is very similar to the related Corsican painted frog, Discoglossus montalentii, with whom it shares part of its habitat in Corsica. Its natural habitats are temperate forests, rivers, intermittent rivers, freshwater marshes, and intermittent freshwater marshes. It can be found from sea level up to more than 1 700 meters of altitude. Able to endure slight water pollution, it is nevertheless threatened by habitat loss. The species isn't immediately threatened and is classified as Least Concern (LC) on the IUCN Red List. It still fragile and subject to several threats justifying strong conservation efforts in both France and Italy, where it is fully protected and part of Annex 2 of the Habitats Directive. On top of habitat loss caused by urbanization, the species is sensible to chytridiomycosis, a skin disease threatening amphibian species across the globe. Not well known from the wider public, the Tyrrhenian painted frog figures among the emblematic species of several protected area, including the Port-Cros National Park in France.

Description The Tyrrhenian painted frog is a short amphibian species of robust build, ranging from 5 to 7.5 cm (2.0 to 3.0 in) in length. Its color varies from dark brown to grey, black or reddish brown. Lighter spots are very commonplace, with plain individuals being rare. Most of the time, a large light spot is present between the shoulders and a large dark spot between the eyes, with a lighter, straight front edge. A bright crescent-shaped spot can sometimes be present on the top of the head between the snout and the midpoint of the eyes, near the shoulder girdle. The belly is yellowish to cream white. The pupil is shaped like a reverse droplet, with the iris divided between a lighter golden upper half and a darker lower half, as characteristic of Discoglossus. As with other species of the genus, the eardrum is barely visible. Skin is most often smooth. However, during mating season, males present a dry, rough skin. Soft warts are present on the neck and limbs, often in line patterns. The head is larger than it is wide, with the snout being slightly pointed and thinned out - noticeably more so than D. montalentii. The fourth finger of its front foot is spatulated rather than tapering and its hind legs are shorter.

Distribution and habitat The Tyrrhenian painted frog is found in most parts of the islands of Corsica and Sardinia, but it is not present in the central highlands. It is also present on several small islands in the Tyrrhenian Sea, such as Iles d'Hyères, Giglio, Montecristo, and the Monte Argentario peninsula in Tuscany. Its habitats include coastal plains, forest streams, maquis shrubland, and upland coniferous forests. Slow streams and pools are used for breeding, and this frog can tolerate brackish water.

Biology Like other members of its family, the Corsican painted frog eats small invertebrates. Whether observations of this frog in the past were of D. sardus or D. montalentii is unclear, because they are so similar in appearance and were only recognised as different species in the late 20th century. Consequently, its reproductive habits are uncertain, but it is believed to lay its eggs in small groups or singly on the bottom of watercourses. They are brownish-black and 1 to 1.5 mm (0.04 to 0.06 in) in diameter with a thick, gelatinous casing.

Status The IUCN has listed this frog as being of least concern. The populations in Corsica and Sardinia seem stable, but mainland populations are decreasing and populations on smaller islands may suffer from lack of genetic diversity. The main threats faced by this frog are degradation of its woodland and aquatic habitats, but it seems adaptable and able to tolerate some disturbance to its habitat.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tyrrhenian painted frog

Start with the simplest possible case. Write down what Tyrrhenian painted frog claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tyrrhenian painted frog before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tyrrhenian painted frog ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tyrrhenian painted frog

In research: Tyrrhenian painted frog appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tyrrhenian painted frog in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tyrrhenian painted frog is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amphibians described in 1837, Amphibians of Europe, Discoglossus, so understanding it makes those chapters shorter.
In everyday life: Look for Tyrrhenian painted frog outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tyrrhenian painted frog in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tyrrhenian painted frog means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tyrrhenian painted frog out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tyrrhenian painted frog in simple terms?

Why does Tyrrhenian painted frog matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tyrrhenian painted frog?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tyrrhenian painted frog.