biology

Quagga

Quagga 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 Quagga rather than just read about it. In short: The quagga ( or ) (Equus quagga quagga) is an extinct subspecies of the plains zebra which was endemic to South Africa until it was hunted to extinction in the late 19th century. It was long thought to be a distinct species, but mtDNA studies have supported it being a subspecies of plains zebra.

Key takeaways

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

Reference excerpt

The quagga ( or ) (Equus quagga quagga) is an extinct subspecies of the plains zebra which was endemic to South Africa until it was hunted to extinction in the late 19th century. It was long thought to be a distinct species, but mtDNA studies have supported it being a subspecies of plains zebra. A more recent study suggested that it was the southernmost cline or ecotype of the species. The quagga is believed to have been around 257 cm (8 ft 5 in) long and 125–135 cm (4 ft 1 in – 4 ft 5 in) tall at the shoulders. It was distinguished from other zebras by its limited pattern of primarily brown and white stripes, mainly on the front part of the body. The rear was brown and without stripes, and appeared more horse-like. The distribution of stripes varied considerably between individuals. Little is known about the quagga's behaviour, but it may have gathered into herds of 30–50. Quaggas were said to be wild and lively, yet were also considered more docile than the related Burchell's zebra. They were once found in great numbers in the Karoo of Cape Province and the southern part of the Orange Free State in South Africa. After the European settlement of South Africa began, the quagga was extensively hunted, as it competed with domesticated animals for forage. Some were taken to zoos in Europe, but breeding programmes were unsuccessful. The last wild population lived in the Orange Free State; the quagga was extinct in the wild by 1878. The last captive specimen died in Amsterdam on 12 August 1883. 23 skins and seven skeletons exist today, and only two quaggas were ever photographed alive. In 1984, the quagga was the first extinct animal whose DNA was analysed. The Quagga Project has attempted to breed Burchell's zebras with similar striping patterns to the quagga.

Taxonomy It has been historically suggested that the name quagga is derived from the Khoekhoe word for zebra; cf. Kora !oaxais 'quagga', which is also the origin of the isiXhosa inqwarhashe 'quagga'.

The quagga was originally classified as a distinct species, Equus quagga, in 1778 by Dutch naturalist Pieter Boddaert. Traditionally, the quagga and the other plains and mountain zebras were placed in the subgenus Hippotigris. Much debate has occurred over the status of the quagga in relation to the plains zebra. The British zoologist Reginald Innes Pocock in 1902 was perhaps the first to suggest that the quagga was a subspecies of the plains zebra. As the quagga was scientifically described and named before the plains zebra, the trinomial name for the quagga becomes E. quagga quagga under this scheme, and the other subspecies of the plains zebra are placed under E. quagga, as well. Historically, quagga taxonomy was further complicated because the extinct southernmost population of Burchell's zebra (Equus quagga burchellii, formerly Equus burchellii burchellii) was thought to be a distinct subspecies (also sometimes thought a full species, E. burchellii). The extant northern population, the "Damara zebra", was later named Equus quagga antiquorum, which means that it is today also referred to as E. q. burchellii, after it was realised they were the same taxon. The extinct population was long thought very close to the quagga, since it also showed limited striping on its hind parts. As an example of this, Shortridge placed the two in the now disused subgenus Quagga in 1934. Most experts now suggest that the two subspecies represent two ends of a cline. Different subspecies of plains zebras were recognised as members of Equus quagga by early researchers, though much confusion existed over which species were valid. Quagga subspecies were described on the basis of differences in striping patterns, but these differences were since attributed to individual variation within the same populations. Some subspecies and even species, such as E. q. danielli and Hippotigris isabellinus, were based only on illustrations (iconotypes) of aberrant quagga specimens. One craniometric study from 1980 seemed to confirm its affiliation with the horse (Equus ferus caballus), but early morphological studies have been noted as being erroneous. Studying skeletons from stuffed specimens can be problematic, as early taxidermists sometimes used donkey and horse skulls inside their mounts when the originals were unavailable.

Evolution

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Quagga

Start with the simplest possible case. Write down what Quagga 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 Quagga 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 Quagga 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 Quagga

In research: Quagga 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 Quagga 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: Quagga is common in secondary-school and first-year university syllabi. It links to neighbouring topics IUCN Red List extinct species, Mammal extinctions since 1500, Mammals described in 1785, so understanding it makes those chapters shorter.
In everyday life: Look for Quagga 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 Quagga in 20 minutes

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

Frequently asked questions

What is Quagga in simple terms?

Why does Quagga 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 Quagga?

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 Quagga.