biology

Pike topminnow

Pike topminnow 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 Pike topminnow rather than just read about it. In short: The pike topminnow (Belonesox belizanus), more commonly known as pike killifish and sometimes referred to as topminnow, is a species of poeciliid found from Mexico to Nicaragua. It has also been introduced to Florida, USA.

Key takeaways

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

Reference excerpt

The pike topminnow (Belonesox belizanus), more commonly known as pike killifish and sometimes referred to as topminnow, is a species of poeciliid found from Mexico to Nicaragua. It has also been introduced to Florida, USA. It is the only known member of its genus. The pike topminnow was described in 1860 by Austrian ichthyologist Rudolf Kner, who gave the type locality as Belize, which is reflected in this species' specific name.

Ecology Unlike most poeciliids (which tend to be generalists or micropredators), this is a highly specialized predator, with an extremely flexible upper jaw that enables it to take very large prey items for its size.

Description

It grows typically to 9.7 cm (3.8 in) total length, exceptionally to 20 cm (7.9 in). It has an elongated appearance with a flat back profile. The lower jaw is longer than the upper, and upturned. The pike topminnow has large eyes and a dorsal fin set far back on the body. It is a light, olive/brown color with light green iridescence and small black spots on the flanks. The belly is a lighter yellowish white. A dark spot is at the base of the caudal fin. They are also a livebearing fish.

In the aquarium This fish can be found in the aquarium trade, but is not an easy aquarium resident, especially by poeciliid standards.

References

Illustrations

Worked examples

Example 1 — a first encounter with Pike topminnow

Start with the simplest possible case. Write down what Pike topminnow 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 Pike topminnow 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 Pike topminnow 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 Pike topminnow

In research: Pike topminnow 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 Pike topminnow 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: Pike topminnow is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fish described in 1860, Fish of Lake Nicaragua, Freshwater fish of Mexico, so understanding it makes those chapters shorter.
In everyday life: Look for Pike topminnow 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 Pike topminnow in 20 minutes

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

Frequently asked questions

What is Pike topminnow in simple terms?

Why does Pike topminnow 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 Pike topminnow?

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 Pike topminnow.