biology

Ramón Bravo

Ramón Bravo 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 Ramón Bravo rather than just read about it. In short: Ramón Bravo (21 October 1925 – 21 February 1998) was a Mexican diver, photographer and underwater filmmaker. Bravo was the person who made the phenomenon of Sleeping sharks known to the world.

Key takeaways

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

Reference excerpt

Ramón Bravo (21 October 1925 – 21 February 1998) was a Mexican diver, photographer and underwater filmmaker. Bravo was the person who made the phenomenon of Sleeping sharks known to the world.

Biography Bravo was born in Piedras Negras, Coahuila in northern Mexico from his parents Juan Bravo, a railroader, and María del Rosario Prieto. Bravo was first known as a famous Mexican swimmer and competed in the 1948 Summer Olympics. Also played as Wide receiver in UNAM football team. Thanks to his close friend Apolonio Castillo in the late 50s, Bravo began to dedicate himself to diving and underwater photography– gaining him fame in both in the United States and Europe as an oceanographer. Bravo developed a fascination for sharks and devoted a large portion of his life to filming and studying sharks. He is widely known for the discovery, study, and photography of "sleeping sharks" near Isla Mujeres in the Caribbean where sharks were seen there to be "sleeping" on the ocean floor. Bravo was the first person to dive and film with orcas in their natural state without a protective cage in the frosty waters of Islas San Benito in Baja California, Mexico or polar bears swimming at the North Pole, where even one bit his left heel.

The sleeping sharks It was Ramón Bravo in the 1970s, who made known to the world how sharks sleep, after the lobster fisherman Carlos García, nicknamed "Válvula" (the "Valve" in English), discovered them in a place known as "Los Cuevones" (The big caves). At first Bravo did not believe "Válvula" because scientists said that sharks could not sleep, that they must be constantly moving because they lacked a swim bladder he initially thought that they were harmless nurse shark crawling on the sand, but due to the insistence of "Vávula", finally Bravo went to verify the discovery of the fisherman then he verified and filmed that tiger, mako, whitetip or bull sharks rested peacefully on the white sands in caves of the Caribbean Sea and, later, shared the discovery with Dr. Eugenie Clark, a member of the Scripps Institution of Oceanography of La Joya, California. Dr. Clark's scientific explanation was:

Due to their static position on the sand against the current, the sharks remained immobile and practically "drugged", because when the water ran, they took the oxygen necessary for their respiratory process through their gills, without the need to move, the salty water mixed with fresh water from the Yucatan Peninsula producing an electromagnetic field in the water, in addition to helping to deworm the dormant sharks. Bravo also served as guide and cameraman to Jacques-Yves Cousteau, his son Philippe and his divers of the Calypso, into the cave of sleeping sharks and reefs surrounding Isla Mujeres resulted in a documentary called, The Sleeping Sharks of Yucatan where Ramón Bravo appears in the credits. The investigations of Ramón Bravo were not without dangers, since on more than one occasion he was injured by the sharks he used to film. One of them (a bull shark) bit him, causing a serious injury to his left forearm, at the elbow, which required urgent surgery and intensive care for several weeks.

Also a well-known journalist and writer during the mid-1960s and 1970s, he wrote, among others, the following novels and works:

Primero y touch, segundo y muerte (1961) Bajo las aguas del Mar Rojo (1962) Isla Mujeres (1972) Holbox (1974) Tintorera (1975) Buceando entre Tiburones (1975) El cenote de la muerte (1976) El cisne negro (1976) Un tesoro bajo el mar (1977) Carnada (1978) Buceando en el Polo Norte (1979) Un tesoro bajo el mar (1979) Buceando entre las Orcas (1982) La siesta del tiburón (1984) Sirenia (1987) El Chinchorro (not completed, about the protected zone of Mahahual) One of his novels later became a film called Tintorera (1977) directed by René Cardona Jr. The underwater photography was by Ramón Bravo. He also photographed and directed underwater scenes of the James Bond movie Licence to Kill (1989) starring Timothy Dalton. Although uncredited, Bravo played the zombie that fought the tiger shark underwater in Lucio Fulci's Zombi 2 after René Cardona Jr. stepped down. The shark was fed prior to filming as well as pumped with tranquilizers to keep it placid.

Death Ramón Bravo died on 21 February 1998 by accident, because of an accidental heart attack caused by an electric shock from his home in Isla Mujeres. On 28 February 1998, in the presence of the then President of Mexico, Ernesto Zedillo, Jean-Michel Cousteau and many local and State authorities, at the entrance to the underwater cave of the Sleeping Sharks, located between Isla Contoy and Isla Mujeres, in Quintana Roo, Mexico. Ramón's wife, María Vallejo and priest Eduardo Pérez deposited the ashes and, at the entrance, a bronze plaque was placed in his honor at the wish of his dearest friends and many famous divers, which says:

Ramón Bravo, protector of the sea and the ocean, sleeps forever next to his sharks in this cave. Isla Mujeres 02–28–98.

References

External links

Ramón Bravo at Olympics.com Ramón Bravo at Olympedia Ramón Bravo at IMDb

Illustrations

Ramón Bravo: Ramón Bravo and Commander Cousteau — Ramón Bravo and Commander Cousteau

Worked examples

Example 1 — a first encounter with Ramón Bravo

Start with the simplest possible case. Write down what Ramón Bravo 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 Ramón Bravo 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 Ramón Bravo 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 Ramón Bravo

In research: Ramón Bravo 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 Ramón Bravo 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: Ramón Bravo is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1925 births, 1998 deaths, 20th-century Mexican journalists, so understanding it makes those chapters shorter.
In everyday life: Look for Ramón Bravo 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 Ramón Bravo in 20 minutes

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

Frequently asked questions

What is Ramón Bravo in simple terms?

Ramón Bravo (21 October 1925 – 21 February 1998) was a Mexican diver, photographer and underwater filmmaker. Bravo was the person who made the phenomenon of Sleeping sharks known to the world.

Why does Ramón Bravo 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 Ramón Bravo?

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 Ramón Bravo.