science

Sinocyclocheilus donglanensis

Sinocyclocheilus donglanensis is a science 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 Sinocyclocheilus donglanensis rather than just read about it. In short: Sinocyclocheilus donglanensis (Donglan golden-line barbel) is a species of cave fish in the family Cyprinidae. It is endemic to Guangxi province in southern China, and only known from a subterranean tributary of the Hongshui River, a tributary of the Pearl River.

Key takeaways

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

Reference excerpt

Sinocyclocheilus donglanensis (Donglan golden-line barbel) is a species of cave fish in the family Cyprinidae. It is endemic to Guangxi province in southern China, and only known from a subterranean tributary of the Hongshui River, a tributary of the Pearl River. Its specific name donglanensis refers to the Donglan County where its type locality is located. It is not known from elsewhere.

Description Sinocyclocheilus donglanensis grows to 12.4 cm (4.9 in) standard length; mean length of five individuals was 8.3 cm (3.3 in). The head is compressed and has developed eyes. The mouth has two barbels and is slightly inferior, with the upper jaw that protrudes slightly beyond the lower one. The body is compressed and completely scaled. The highest body depth (about 31% of standard length) occurs exactly at the dorsal fin insertion. The lateral line is complete and curved. In preservative, the colour of the back is dark brownish; the abdomen is light grayish. Pelvic and anal fins are light yellowish. It resembles morphologically most closely Sinocyclocheilus yishanensis known from the Liu River, another river in the Pearl River system. Both have "normal" body shape, in contrast to some other Sinocyclocheilus species showing humps or horns.

Ecology and behaviour Virtually nothing is known about the ecology and behaviour of this species. It shares its habitat (and type locality) with another cave fish species, Sinocyclocheilus altishoulderus.

Habitat and conservation The type locality, near Gongping Village, Taiping Town, Donglan County, is a subterranean river some 10–20 metres inside from the mouth of a small cave. During the rainy season, the water can extend outside the cave to form a small lake. The habitat is potentially threatened by water extraction, waste disposal and pesticide pollution, and landscape alterations in general.

References

Worked examples

Example 1 — a first encounter with Sinocyclocheilus donglanensis

Start with the simplest possible case. Write down what Sinocyclocheilus donglanensis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Sinocyclocheilus donglanensis 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 Sinocyclocheilus donglanensis 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 Sinocyclocheilus donglanensis

In research: Sinocyclocheilus donglanensis appears in science 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 Sinocyclocheilus donglanensis 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: Sinocyclocheilus donglanensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cave fish, Cyprinid fish of Asia, Endemic fauna of Guangxi, so understanding it makes those chapters shorter.
In everyday life: Look for Sinocyclocheilus donglanensis 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 Sinocyclocheilus donglanensis in 20 minutes

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

Frequently asked questions

What is Sinocyclocheilus donglanensis in simple terms?

Why does Sinocyclocheilus donglanensis matter?

Because it connects several science 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 Sinocyclocheilus donglanensis?

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 Sinocyclocheilus donglanensis.