biology

Réunion giant tortoise

Réunion giant tortoise 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 Réunion giant tortoise rather than just read about it. In short: The Reunion giant tortoise (Cylindraspis indica) is an extinct species of giant tortoise in the family Testudinidae. It was endemic to Réunion Island in the Indian Ocean.

Key takeaways

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

Reference excerpt

The Reunion giant tortoise (Cylindraspis indica) is an extinct species of giant tortoise in the family Testudinidae. It was endemic to Réunion Island in the Indian Ocean. This giant tortoise was numerous in the 17th and early 18th centuries. They were killed in vast numbers by European sailors, and finally became extinct in the 1840s.

Description The Réunion giant tortoise was 50 to 110 cm (20 to 43 in) long. It was the largest of the Cylindraspis giant tortoise species of the Mascarenes. It was roughly the same size as modern Aldabra giant and Galapagos giant tortoises, though it was a longer and more elongated animal. It had long legs and a long neck which supported a large head with powerful, strongly-serrated jaws. The species was sexually dimorphic, in that males were noticeably larger than females. It was also a highly variable species. A problem arises when identifying this species because it appears there were domed variants as well as saddle-backed variants.

Distribution This species was endemic to Réunion. On this island it was naturally extremely numerous, and its vast herds provided an important role in the health and rejuvenation of the indigenous forests.

Extinction

These giant tortoises were very friendly, curious, and had no fear of humans. They were, therefore, easy prey for the first inhabitants of the island, and were slaughtered in vast numbers to be burnt for fat and oil, or to be used as food (for humans or pigs). Large numbers were also stacked into the holds of passing ships, as food supplies for sea trips. In addition, invasive species, such as pigs, cats, and rats, destroyed the eggs and hatchlings of the giant tortoises. Coastal populations were completely decimated by the 18th century. It was presumed extinct in much of the island since 1800, with the last specimen observed in Upper Cilaos. The last few animals survived in the highlands until the 1840s.

References

Illustrations

Worked examples

Example 1 — a first encounter with Réunion giant tortoise

Start with the simplest possible case. Write down what Réunion giant tortoise 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 Réunion giant tortoise 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 Réunion giant tortoise 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 Réunion giant tortoise

In research: Réunion giant tortoise 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 Réunion giant tortoise 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: Réunion giant tortoise is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cylindraspis, Endemic fauna of Réunion, Extinct turtles, so understanding it makes those chapters shorter.
In everyday life: Look for Réunion giant tortoise 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 Réunion giant tortoise in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Réunion giant tortoise 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 Réunion giant tortoise out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Réunion giant tortoise in simple terms?

The Reunion giant tortoise (Cylindraspis indica) is an extinct species of giant tortoise in the family Testudinidae. It was endemic to Réunion Island in the Indian Ocean.

Why does Réunion giant tortoise 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 Réunion giant tortoise?

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 Réunion giant tortoise.