biology

Pictichromis paccagnellorum

Pictichromis paccagnellorum 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 Pictichromis paccagnellorum rather than just read about it. In short: The royal dottyback (Pictichromis paccagnellorum), also called the bicolor dottyback, gramma dotty or false gramma is a fish commonly kept in marine aquariums. The front of the fish is bright purple and the posterior is yellow.

Key takeaways

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

Reference excerpt

The royal dottyback (Pictichromis paccagnellorum), also called the bicolor dottyback, gramma dotty or false gramma is a fish commonly kept in marine aquariums. The front of the fish is bright purple and the posterior is yellow. In an aquarium, it will grow up to three inches long. The dottyback will defend its territory against fish several times its size, but gets along with many other common aquarium fish. It is sometimes mistaken for a royal gramma (Gramma loreto). The specific name honours the Paccagnella family of Bologna who were wholesalers of aquarium fish and who gave the type to the author, Herbert R. Axelrod. It can grow up to 6 cm in length.

References

Gill, A. C. 2004 (3 June) Revision of the Indo-Pacific dottyback fish subfamily Pseudochrominae (Perciformes: Pseudochromidae). Smithiana Monographs No. 1: 1–213, Pls. 1-12.

External links

Photos of Pictichromis paccagnellorum in the Sealife Collection

Illustrations

Worked examples

Example 1 — a first encounter with Pictichromis paccagnellorum

Start with the simplest possible case. Write down what Pictichromis paccagnellorum 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 Pictichromis paccagnellorum 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 Pictichromis paccagnellorum 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 Pictichromis paccagnellorum

In research: Pictichromis paccagnellorum 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 Pictichromis paccagnellorum 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: Pictichromis paccagnellorum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fish described in 1973, Fishkeeping, IUCN Red List least concern species, so understanding it makes those chapters shorter.
In everyday life: Look for Pictichromis paccagnellorum 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 Pictichromis paccagnellorum in 20 minutes

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

Frequently asked questions

What is Pictichromis paccagnellorum in simple terms?

Why does Pictichromis paccagnellorum 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 Pictichromis paccagnellorum?

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 Pictichromis paccagnellorum.