biology

Salvelinus profundus

Salvelinus profundus 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 Salvelinus profundus rather than just read about it. In short: Salvelinus profundus (German: Tiefseesaibling 'Deepwater char') is a deepwater char species found only in deep areas of Lake Constance. This fish can reach 24 cm (9.4 in) in length and has a blunt snout with the mouth in subinferior position.

Key takeaways

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

Reference excerpt

Salvelinus profundus (German: Tiefseesaibling 'Deepwater char') is a deepwater char species found only in deep areas of Lake Constance. This fish can reach 24 cm (9.4 in) in length and has a blunt snout with the mouth in subinferior position. Its lower fins have no white margins and its flanks are silvery to yellowish with pale blue spots; the belly can have a reddish color.

History Salvelinus profundus was still a commercial species in the 1960s but the eutrophication of Lake Constance, which began in the 1950s and peaked in 1979, is thought to have affected egg development. Surveys undertaken in the last ten years failed to find any evidence of the survival of this deep-water trout, as well as of the Lake Constance whitefish (Coregonus gutturosus), another fish species driven recently to extinction. The species had been reported extinct since the late 1970s but was officially declared so by the IUCN only in 2008. However, the fish species was rediscovered in 2016 during 'Project Lac', a marine survey undertaken by the Swiss Federal Institute of Aquatic Science and Technology. The team had not expected to locate the fish, which had not been seen in decades. It is suspected that they were not detected earlier due to the depth at which they swim. The Lake Neuchâtel deepwater char (Salvelinus neocomensis) is a similar fish species that became extinct in another European lake.

References

Illustrations

Worked examples

Example 1 — a first encounter with Salvelinus profundus

Start with the simplest possible case. Write down what Salvelinus profundus 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 Salvelinus profundus 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 Salvelinus profundus 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 Salvelinus profundus

In research: Salvelinus profundus 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 Salvelinus profundus 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: Salvelinus profundus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cold water fish, Fauna of Germany, Fish described in 1901, so understanding it makes those chapters shorter.
In everyday life: Look for Salvelinus profundus 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 Salvelinus profundus in 20 minutes

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

Frequently asked questions

What is Salvelinus profundus in simple terms?

Why does Salvelinus profundus 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 Salvelinus profundus?

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 Salvelinus profundus.