biology

Haliotis jacnensis

Haliotis jacnensis 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 Haliotis jacnensis rather than just read about it. In short: Haliotis jacnensis, the Jacna abalone, is a species of marine gastropod in the family Haliotidae. Description The shell size varies between 7 and 25 mm (0.28 and 0.98 in).

Key takeaways

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

Reference excerpt

Haliotis jacnensis, the Jacna abalone, is a species of marine gastropod in the family Haliotidae.

Description The shell size varies between 7 and 25 mm (0.28 and 0.98 in). The oblong-ovate shell is spirally peculiarly rudely ridged. The ridges are very irregular and rather scaly, somewhat smooth next the perforations which are slightly tubiferous and distant. The coloration is reddish-orange. The interior surface is silvery. This is a very characteristic species, to which there is little or no approximation in any other.

Subspecies There are two subspecies:

Haliotis jacnensis jacnensis Reeve, 1846 Haliotis jacnensis kershawi Owen, 2012

Distribution This species is distributed in the western Pacific Ocean, around the coasts of American Samoa, Fiji, Guam, Indonesia, Japan, Micronesia, New Caledonia, Niue, the Northern Mariana Islands, the Philippines, the Solomon Islands, Tonga, Tuvalu and Vanuatu. It resides at depths between 0 and 50 m (0 and 164 ft).

References

Further reading Geiger D.L. & Poppe G.T. (2000). A Conchological Iconography: The family Haliotidae. Conchbooks, Hackenheim Germany. Geiger D.L. & Owen B. (2012) Abalone: Worldwide Haliotidae. Hackenheim: Conchbooks. p. 53

External links

"Haliotis (Haliotis) jacnensis". Gastropods.com. Retrieved 19 November 2010.

Illustrations

Worked examples

Example 1 — a first encounter with Haliotis jacnensis

Start with the simplest possible case. Write down what Haliotis jacnensis 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 Haliotis jacnensis 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 Haliotis jacnensis 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 Haliotis jacnensis

In research: Haliotis jacnensis 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 Haliotis jacnensis 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: Haliotis jacnensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abalone, Gastropods described in 1846, IUCN Red List least concern species, so understanding it makes those chapters shorter.
In everyday life: Look for Haliotis jacnensis 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 Haliotis jacnensis in 20 minutes

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

Frequently asked questions

What is Haliotis jacnensis in simple terms?

Haliotis jacnensis, the Jacna abalone, is a species of marine gastropod in the family Haliotidae. Description The shell size varies between 7 and 25 mm (0.28 and 0.98 in).

Why does Haliotis jacnensis 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 Haliotis jacnensis?

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 Haliotis jacnensis.