science

West African Dwarf sheep

West African Dwarf sheep is a science 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 West African Dwarf sheep rather than just read about it. In short: The West African Dwarf or Djallonké is an African breed or group of breeds of domestic sheep. It is the dominant breed of West and Central Africa.

Key takeaways

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

Reference excerpt

The West African Dwarf or Djallonké is an African breed or group of breeds of domestic sheep. It is the dominant breed of West and Central Africa. This breed is primarily raised for meat. The Cameroon or Cameroon Dwarf is a breed within this group.

Characteristics The West African Dwarf is generally white or piebald, the front half being black and the back half white. However, skewbald (tan on white) and the black belly pattern are found, and the Kirdi type are specially selected to be entirely black. Rams weigh approximately 37 kg (82 lb), have a well-developed throat ruff and are usually horned. The horns are wide at the base, curve backwards, outwards and then forwards again, with a maximum of one and a half coils. Ewes weigh about 25 kg (55 lb) and are usually polled (hornless), but may have slender short horns. The ears are short and pendulous, the neck is long and slender, the chest is deep, the legs are short, the back is long and dished, higher at the withers than at the tail-head, and the tail reaches the hocks. On average, ewes produce 1.15 to 1.50 lambs per lambing. This breed grows slowly as evaluated in Nigeria in the last 1970s. The overall growth rates from 0–90, 91–150 and 151–350 days old were 74, 49 and 34 g/day, respectively. This breed is also highly tolerant of trypanosome. This breed is thought to go into oestrus throughout the year.

Cameroon sheep The Cameroon is a hair sheep which it sheds yearly in the spring. Ewes can raise two lamb crops per year. Their most common color is brown with a black belly, head, and legs. Cameroon sheep are more likely to accept their newborn lamb than other sheep breeds do which makes them great mothers.

Distribution The West African Dwarf sheep is found in West Africa, its range extending from Senegal to Chad, Gabon, Cameroon, and the Republic of Congo. It is adapted for life in humid forested areas, subhumid areas, and savannahs. The Kirdi or Poulfouli is a wholly black variant found in northern Cameroon and southwestern Chad.

See also Pelibuey (sheep) West African Dwarf goat

References

Further reading Fitzhugh und Bradford (eds.): Hairsheep of West Africa and the Americas. A genetic resource for the tropics. 1983 R.M. Njwe und Y. Manjeli: Milk yield of Cameroon dwarf blackbelly sheep - Production laitière de moutons Djallonké au Cameroun. In: Small ruminant research and development in Africa - Réseau africain de recherche sur les petits ruminants. ILCA Research Report - 2, 1982, X5520/B

Worked examples

Example 1 — a first encounter with West African Dwarf sheep

Start with the simplest possible case. Write down what West African Dwarf sheep claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 West African Dwarf sheep 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 West African Dwarf sheep 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 West African Dwarf sheep

In research: West African Dwarf sheep appears in science 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 West African Dwarf sheep 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: West African Dwarf sheep is common in secondary-school and first-year university syllabi. It links to neighbouring topics Agriculture in Africa, Sheep breeds, Sheep breeds originating in Cameroon, so understanding it makes those chapters shorter.
In everyday life: Look for West African Dwarf sheep 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 West African Dwarf sheep in 20 minutes

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

Frequently asked questions

What is West African Dwarf sheep in simple terms?

The West African Dwarf or Djallonké is an African breed or group of breeds of domestic sheep. It is the dominant breed of West and Central Africa.

Why does West African Dwarf sheep matter?

Because it connects several science 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 West African Dwarf sheep?

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 West African Dwarf sheep.