biology

Wied's marmoset

Wied's marmoset 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 Wied's marmoset rather than just read about it. In short: Wied's marmoset (Callithrix kuhlii), also known as Wied's black-tufted-ear marmoset, is a New World monkey that lives in tropical and subtropical forests of eastern Brazil. Unlike other marmosets, Wied's marmoset lives in groups consisting of 4 or 5 females and 2 or 3 males (plus children).

Key takeaways

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

Reference excerpt

Wied's marmoset (Callithrix kuhlii), also known as Wied's black-tufted-ear marmoset, is a New World monkey that lives in tropical and subtropical forests of eastern Brazil. Unlike other marmosets, Wied's marmoset lives in groups consisting of 4 or 5 females and 2 or 3 males (plus children). They are matriarchal, and only the dominant female is allowed to mate. Like other marmosets, the offspring are always born in pairs.

Etymology Wied's marmoset is named after Prince Maximilian of Wied-Neuwied, who was the first person to discover the species during his travels from 1815-1816.

Diet The wied's marmoset will supplement its diet with fruit, nectar, gum, tree exudates, vines, and insects. When they eat insects, they will generally scan their environment before pouncing on the insects.

Natural Predators Wied's marmoset is eaten by birds of prey (the harpy eagle, the gray hawk, the roadside hawk and the white-tailed hawk), felines (the jaguar, jaguarundi and ocelot) and snakes.

Behavior Wied's marmoset is highly social, spending much of its time grooming. It has individually distinctive calls, and it communicates through gestures and olfactory markings as well.

Appearance The coloring of Wied's marmoset is mostly black, with white markings on cheeks and forehead. It has rings on its tail and black tufts of fur coming out of its ears.

Chimerism Chimeric individuals carry two or more genetic cell lines in their bodies, each of which stems from a separate and genetically distinct zygote. This chimerism is the result of cell lines exchanged between siblings in utero. These two original zygotes were fertilized by two different sperm, which potentially came from more than one male. Therefore, chimeric individuals exhibit a phenotype that is the result of more than one genotype, and potentially more than one father. Researchers first discovered chimerism in the bone marrow of marmosets in the 1960s. More recent work has shown that chimerism can occur in all cell lines, including germ cells. This allows for the possibility of horizontal inheritance. In other words, individuals could pass on the genotype that is different from their majority (or self) genotype. Consider a father marmoset was chimeric in his germ line. This father could potentially pass on his secondary cell line (the majority or self cell line of his brother) to his offspring. In this way, this father's offspring would be more genetically similar to their uncle than to their father. Since chimerism changes the degrees of relatedness between individuals, it also changes the adaptive value of certain behaviors, like cooperatively raising young. It has been proposed that chimerism creates a system that makes it evolutionarily advantageous for an individual to cooperate to raise its siblings; this closely matches to the way marmoset social systems have been observed to function in the wild.

References

External links Animal Diversity Web: Callithrix kuhlii

Illustrations

Worked examples

Example 1 — a first encounter with Wied's marmoset

Start with the simplest possible case. Write down what Wied's marmoset 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 Wied's marmoset 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 Wied's marmoset 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 Wied's marmoset

In research: Wied's marmoset 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 Wied's marmoset 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: Wied's marmoset is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arboreal mammals, Callithrix, Endemic mammals of Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for Wied's marmoset 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 Wied's marmoset in 20 minutes

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

Frequently asked questions

What is Wied's marmoset in simple terms?

Why does Wied's marmoset 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 Wied's marmoset?

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 Wied's marmoset.