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Lacepede Islands

Lacepede Islands 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 Lacepede Islands rather than just read about it. In short: The Lacepede Islands, sometimes referred to simply as the Lacepedes, are a group of four islands lying off the Kimberley coast of Western Australia, about 120 kilometres (75 miles) north of Broome. They are about 30 km (19 mi) from the Dampier Peninsula, from which they are separated by the Lacepede Channel.

Lacepede Islands — main illustration
Lacepede Islands — illustration

Key takeaways

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

Reference excerpt

The Lacepede Islands, sometimes referred to simply as the Lacepedes, are a group of four islands lying off the Kimberley coast of Western Australia, about 120 kilometres (75 miles) north of Broome. They are about 30 km (19 mi) from the Dampier Peninsula, from which they are separated by the Lacepede Channel. They are important for their breeding seabirds.

Description The Lacepede group (originally named Napoleon, Grant and Victoria islands) is a 12-kilometre (7.5 mi) long chain of four islands known as West Island, Middle Island, Sandy Island and East Island. They are all small, low spits of coarse sand and coral rubble, lying atop a platform coral reef. They are treeless but support low vegetation. Average annual rainfall is about 750 mm. East Island is the site of the East Island Lighthouse.

Environment The Lacepede Islands are an A-class reserve managed by the Department of Environment and Conservation. Rats were eradicated in 1986, allowing the recolonisation of the islands by nesting seabirds. They are Western Australia's most important breeding habitat for green turtles. There has been a possible sighting of an Omura's whale, one of the most recently described and least known baleen whales.

Birds The islands have been identified by BirdLife International as an Important Bird Area (IBA) because they support over 1% of the world populations of brown boobies and roseate terns. The breeding colony of brown boobies, of up to 18,000 breeding pairs, is possibly the largest in the world. Up to 20,000 roseate terns have been recorded there. Other birds breeding on the islands include masked boobies, Australian pelicans, lesser frigatebirds, eastern reef egrets, silver gulls, crested, bridled and lesser crested terns, common noddies, and pied and sooty oystercatchers. Visiting waders include grey-tailed tattlers, ruddy turnstones, great knots and greater sand plovers.

History The island group was named by Nicolas Baudin on 5 August 1801 during his expedition around Australia, in honour of French naturalist Bernard Germain de Lacepède, who described several Australian fish species. The name of the islands was first charted on the Freycinet Map of 1811.

Guano mining In the 19th century, the Lacepede Islands were among numerous islands off the Western Australian coast that were mined for guano. Although much of the guano mined was by Western Australian industry, there was also extensive unauthorised mining by trading ships from other countries, especially the United States. A Melbourne company, Messrs. Poole, Picken and Co., had been authorised by the Western Australian government to load guano, and had been charged a royalty of 10 shillings per ton. On 26 June 1876, a dispute arose when Gilbert Carver Roberts, on behalf of Samuel Lord, an American merchant and honorary US vice consul in Melbourne, landed from the French-flagged barque de Forcade la Roquette, disputed a demand that he pay a levy for mining and attempted to evict the Victorian guano miners licensed by the Western Australian government. Charles Robert Baldwin planted the United States flag on one of the islands, claiming the island group for that country in accordance with the United States Guano Islands Act that empowered U.S. citizens to take possession of uninhabited islands more than a league (three miles) offshore from any country, so long as they had not been formally claimed. This action, known as the "American Incident" or "Lacepede Islands Incident", sparked a diplomatic and political row, which was eventually resolved by Captain Alexander of the de Forcade la Roquette paying the levy and a fine, and the Western Australian government enacting legislation requiring all guano mining to be licensed, with severe penalties for transgressions. In May 1877 Governor Robinson received advice that US President Ulysses Grant had repudiated Lord's annexation. The extraction of guano was wound down in 1879 when the schooner Aurora removed the machinery used for extraction. The manager Captain R McEachern estimated that the quantity of guano left on the islands was less than 2000 tons.

Blackbirding The Lacepede Islands are also known to have been used by blackbirders, as a place to maroon kidnapped Aboriginal people before signing them up to work in various industries, such as the pearling industry. The government caretaker James Kelly was dismissed in March 1884 for taking bribes from pearlers and allowing the Lacepedes to be used as an illegal depot for Aborigines kidnapped for pearl diving. In one confirmed case Edward Chapman from Cossack was cautioned for kidnapping aborigines from the Beagle Bay community and marooning them on the Lacepedes.

References

Illustrations

Lacepede Islands: Satellite image of the Lacepedes
Satellite image of the Lacepedes
Lacepede Islands: The islands are an important breeding site for brown boobies
The islands are an important breeding site for brown boobies

Worked examples

Example 1 — a first encounter with Lacepede Islands

Start with the simplest possible case. Write down what Lacepede Islands 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 Lacepede Islands 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 Lacepede Islands 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 Lacepede Islands

In research
Lacepede Islands 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 Lacepede Islands 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
Lacepede Islands is common in secondary-school and first-year university syllabi. It links to neighbouring topics Guano trade, Important Bird Areas of Western Australia, Island restoration, so understanding it makes those chapters shorter.
In everyday life
Look for Lacepede Islands 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 Lacepede Islands in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Lacepede Islands means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Lacepede Islands out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lacepede Islands in simple terms?

The Lacepede Islands, sometimes referred to simply as the Lacepedes, are a group of four islands lying off the Kimberley coast of Western Australia, about 120 kilometres (75 miles) north of Broome. They are about 30 km (19 mi) from the Dampier Peninsula, from which they are separated by the Laceped…

Why does Lacepede Islands 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 Lacepede Islands?

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 Lacepede Islands.

Tags

  • Guano trade
  • Important Bird Areas of Western Australia
  • Island restoration
  • Lacepede Islands
  • Pacific islands claimed under the Guano Islands Act

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