biology

Ptychochromis onilahy

Ptychochromis onilahy 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 Ptychochromis onilahy rather than just read about it. In short: Ptychochromis onilahy was a species of cichlid endemic to the Onilahy River in southwestern Madagascar. Despite several recent visits to the region, this species has not been recorded since 1962 when the only known five specimens were collected.

Key takeaways

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

Reference excerpt

Ptychochromis onilahy was a species of cichlid endemic to the Onilahy River in southwestern Madagascar. Despite several recent visits to the region, this species has not been recorded since 1962 when the only known five specimens were collected. It is listed as extinct by the IUCN (their initial rating was made before its official description, and therefore listed under the temporary name Ptychochromis sp. nov. 'Kotro'), but the Onilahy River system is large, and there is a small chance remnant populations exist in remote regions. This species can reach a length of 8.6 centimetres (3.4 in) SL.

References

Worked examples

Example 1 — a first encounter with Ptychochromis onilahy

Start with the simplest possible case. Write down what Ptychochromis onilahy 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 Ptychochromis onilahy 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 Ptychochromis onilahy 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 Ptychochromis onilahy

In research: Ptychochromis onilahy 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 Ptychochromis onilahy 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: Ptychochromis onilahy is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cichlid stubs, Extinct animals of Madagascar, Fish described in 2006, so understanding it makes those chapters shorter.
In everyday life: Look for Ptychochromis onilahy 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 Ptychochromis onilahy in 20 minutes

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

Frequently asked questions

What is Ptychochromis onilahy in simple terms?

Why does Ptychochromis onilahy 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 Ptychochromis onilahy?

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 Ptychochromis onilahy.