biology

Salvelinus thingvallensis

Salvelinus thingvallensis 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 thingvallensis rather than just read about it. In short: Salvelinus thingvallensis is a cold-water fish in the family Salmonidae and one of the few vertebrate species exclusively endemic to Iceland. Its binomial species name commemorates the Icelandic lake Þingvallavatn which includes the limited range in which the fish is found.

Key takeaways

Salvelinus thingvallensis 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 thingvallensis to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Salvelinus thingvallensis from memory before moving on to harder problems.

Reference excerpt

Salvelinus thingvallensis is a cold-water fish in the family Salmonidae and one of the few vertebrate species exclusively endemic to Iceland. Its binomial species name commemorates the Icelandic lake Þingvallavatn which includes the limited range in which the fish is found. Salvelinus thingvallensis was originally described by the Icelandic ichthyologist Bjarni Sæmundsson in 1909. According to the most recent IUCN assessment in 2008, the species is mostly nocturnal and hides between stones during day. Salvelinus thingvallensis is confirmed to live up to 17 years with first spawning usually occurring at 2–4 years of age in October or November. Salvelinus thingvallensis is documented to feed predominately on snails and less frequently on benthic insects.

Description The species is recognized by parr marks (dark vertical bars) in adults with a dark brown flank and irregular golden or yellow spots. The belly is beige to yellow in color with blackish markings often seen on throat. Spawning fish appear similar to non-breeding individuals. The pectoral fins are black, while other fins are beige. The caudal and dorsal fins include pale spots. The snout is blunt and rounded with an equal diameter to the eye. The mouth is subinferior, with a projecting upper jaw.

References

Worked examples

Example 1 — a first encounter with Salvelinus thingvallensis

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

In research: Salvelinus thingvallensis 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 thingvallensis 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 thingvallensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cold water fish, Endemic fauna of Iceland, Fish described in 1909, so understanding it makes those chapters shorter.
In everyday life: Look for Salvelinus thingvallensis 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 thingvallensis in 20 minutes

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

Frequently asked questions

What is Salvelinus thingvallensis in simple terms?

Why does Salvelinus thingvallensis 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 thingvallensis?

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 thingvallensis.