Pratique du Shadowing: Pufferfish | Masters of Self-Defense - Apprendre l'anglais à l'oral avec la vidéo
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Hi everybody, my name is Sarah.
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Welcome back to Future Zoologist Academy.
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Today we'll be learning about a fish
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that is very well known for its useful and adorable ability to inflate like a balloon.
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Today we're learning all about pufferfish.
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Let's get into it.
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Pufferfish are a family of fish with about 200 different species.
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They have many different nicknames, including puffers, balloon fish, blowfish, and others.
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They're sometimes confused with a porcupine fish, which though is similar, they are not the same.
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Pufferfish are most commonly found in warm, tropical oceans.
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They're commonly found in shallow water in protected habitats like coral reefs.
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There are a few species that live in cooler temperate water, but no pufferfish live in cold water.
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Surprisingly, there are several pufferfish species that live in freshwater.
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Pufferfish are, of course, named for their ability to puff up like a balloon, which is one of the ways that they defend themselves from predators.
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However, they have many other ways to defend themselves as well.
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The best way for a pufferfish to protect themselves is to stay hidden,
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and they do this by hiding in cracks and crevices in the reef and by using countershading.
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Countershading is a type of camouflage where an animal has a dark colored back and a light colored belly.
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This helps them stay camouflaged from animals that are both above them and below them.
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Pufferfish are typically slow swimmers, but if spotted by a predator, they can use quick bursts of speed to escape into hiding places.
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They also have a pretty good sense of sight, and they can move their eyes independently and look in different directions at the same time.
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This makes it hard for predators to ambush or sneak attack them.
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If they can't escape, then they inflate like a balloon.
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And they inflate by filling their expandable stomach with water or air if they're up at the surface.
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When they become larger, they become more intimidating to predators
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and it's harder for a predator to get their mouth around the pufferfish's body.
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Their skin is also covered in spines which stick out when they're inflated.
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Sometimes predators may manage to catch a pufferfish before it inflates
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and can choke if the pufferfish inflates while in the predator's throat.
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If they manage to swallow the pufferfish, they may still find themselves in quite a bit of trouble because most pufferfish are poisonous.
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Most pufferfish have a dangerous neurotoxin in their organs which is powerful enough to kill small predators.
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Neurotoxins are especially dangerous because they affect an animal's nervous system,
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which includes their brain and how their brain communicates to the rest of their body.
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With all of these defenses, it may seem like pufferfish should be invincible, but they do actually have some predators.
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Their main predators are sharks, some species of sea snakes, and large fish.
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Larger pufferfish have fewer predators than smaller species.
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The largest pufferfish is the starry puffer, which can measure between three and four feet in length or about one meter.
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The smallest species usually measure just a couple inches in length, sometimes even smaller.
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Not only do pufferfish vary in size, they also vary quite a bit in their colors and patterns.
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Some pufferfish species have the ability to slightly change their color
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or the intensity of their color depending on conditions in their environment.
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And as we mentioned before, many pufferfish have counter shading where they have a darker color on their back and a lighter belly.
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Counter shading is primarily used for avoiding predators, though some pufferfish species also use it to help them sneak up on their prey.
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Most pufferfish species feed on algae and small invertebrates.
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Some of their main prey items include mollusks like clams, mussels, and snails.
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They also feed on crustaceans like crabs and shrimp, and they even feed on worms.
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The scientific name of the pufferfish family is tetraodontidae, which translates to four tooth.
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And they got this name because their teeth are fused together in a way
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that makes it appear like they have four large teeth.
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And their large teeth give them a beak-like structure
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that is strong enough to crack open the hard shells of mollusks and crustaceans.
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Pufferfish typically feed alone.
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The main reason pufferfish come together is for breeding.
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The breeding behaviors of pufferfish vary quite a lot between species.
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Most ocean pufferfish reproduce by spawning, where females release their eggs,
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males release their sperm into the water at the same time where they become fertilized and they float around as plankton.
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Some species attach their eggs to hard structures like rocks instead.
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Either way, the eggs develop in the water and And eventually, a pufferfish emerges that resembles a tiny little version of the adult.
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There is a unique species of pufferfish,
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the white-spotted pufferfish, that actually attracts mates by creating elaborate designs in the sand.
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If females are impressed by the design, she'll mate with that male and lay her eggs in the sand in the design.
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This behavior has stumped scientists for years and years.
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If you'd like to learn more about it and watch a video, please be sure to visit our lesson.
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Regardless of their breeding behaviors, newborn pufferfish are incredibly small and vulnerable to predators.
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Some species actually have a coating of poison on their body when they're young rather than in their organs,
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which actually causes predators to spit them out if they try to eat them.
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A pufferfish's poisons can actually be deadly to humans as well for those that are brave enough to eat them.
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Pufferfish is considered to be a delicacy in some parts of the world, and if it's not cooked and prepared properly,
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it could be bad news for any human that tries to eat it.
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Overfishing pufferfish and collecting them for the aquarium trade can be harmful to pufferfish populations.
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However, their greatest threat is actually habitat loss.
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In many parts of the world, the coral reefs that they rely on for protection and finding food are being damaged.
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And one way that we can help protect pufferfish is by protecting coral reefs, especially the parts of the reefs that are important to them.
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Some organizations, like a scuba diving shop in Costa Rica,
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is actually working to train scuba divers in the area to identify pufferfish species
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and document their sightings so we can learn more about the parts of the reef that the pufferfish rely on.
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Now in other parts of the world pufferfish can actually be a problem.
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In some regions pufferfish are invasive.
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They've been introduced to areas where they are not supposed to be and they out-compete native species for food.
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Local governments in these regions have worked with fishing organizations to
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try to encourage people to take as many pufferfish out of the ocean as they can
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and unfortunately they haven't really seen much success because pufferfish breed so quickly that their populations just seem to keep growing.
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So pufferfish are unusual for us to talk about for conservation
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because depending on where you are in the world pufferfish may need our protection or they may need to be removed.
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If you would like to learn more about puffer fish conservation and if you would like to do quizzes,
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activities, projects and learn even more please be sure to visit that link below to check out our puffer fish lesson.
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Thank you so very much for joining me today to learn all about the adorable puffer fish.
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I can't wait to see you at our next lesson.
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Thank you very much.
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Bye!
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Vocabulaire et conseils d’expression pour cette leçon
Les mots qui reviennent le plus souvent : pufferfish, species, predator, fish, reef. Cette vidéo contient 90 phrases et 1276 mots à répéter en shadowing. La partie parlée dure 8:54. Le locuteur parle à un rythme régulier d’environ 143 mots par minute, confortable pour le shadowing. Seuls 77 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| predator nom | /ˈpɹɛd.ə.tɚ/ | prédateur |
| inflate verbe | /ɪnˈfleɪt/ | gonfler, se gonfler |
| reef nom | /ɹiːf/ | écueil, récif |
| balloon nom | /bəˈlun/ | ballon |
| breed verbe | /ˈbɹiːd/ | se reproduire, engendrer |
| coral nom | /ˈkɔɹəl/ | corail |
| camouflage nom | /ˈkæ.məˌflɑːʒ/ | déguisement |
| crustacean nom | /kɹʌsˈteɪʃən/ | crustacé |
| neurotoxin nom | /ˈn(j)ʊɹoʊtɑksɪn/ | neurotoxine |
| prey nom | /pɹeɪ/ | proie |
| sneak verbe | /sniːk/ | faucher, piquer |
| adorable adjectif | /əˈdoɹ.əˌbəl/ | adorable, mignon |
| poison nom | /ˈpɔɪ.zən/ | poison |
| belly nom | /ˈbɛli/ | ventre |
| organ nom | /ˈɔːɡən/ | organe |
Les verbes à particule que vous entendrez
| Mot | Prononciation | Sens |
|---|---|---|
| check out verbe | mater, regarder | |
| come together verbe | /ˈkʌm tʊˈɡɛðɚ/ | affluer, s’assembler |
| stick out verbe | dépasser, saillir |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | is also covered · are fused · are impressed |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has stumped · They've been introduced · have worked |
| Propositions relatives who / which + proposition — une précision sur une personne ou une chose | balloon, which is · organs which is · puffer, which can |
Prononciation à surveiller
Le locuteur utilise 13 contractions et formes réduites, comme they're, can't, haven't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « sh » et « zh »: pufferfish /ˈpʌfɚˌfɪʃ/, camouflage /ˈkæ.məˌflɑːʒ/, crustacean /kɹʌsˈteɪʃən/, shade /ʃeɪd/, blowfish /ˈbloʊˌfɪʃ/
- Mots longs — placez bien l’accent: neurotoxin /ˈn(j)ʊɹoʊtɑksɪn/, adorable /əˈdoɹ.əˌbəl/, delicacy /ˈdɛlɪkəsi/, intimidate /ɪnˈtɪmɪdeɪt/, invertebrate /ɪnˈvəːtɪbrət/
Les sons difficiles pour les francophones :
- /h/ — il se souffle, il n’est pas muet: habitat /ˈhæb.ɪ.tæt/, harmful /ˈhɑɹmfl̩/
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: choke /t͡ʃoʊk/, attach /əˈtæt͡ʃ/, emerge /ɪˈmɝd͡ʒ/
- /r/ anglais — langue recourbée, sans frotter la gorge: predator /ˈpɹɛd.ə.tɚ/, reef /ɹiːf/, breed /ˈbɹiːd/, coral /ˈkɔɹəl/, crustacean /kɹʌsˈteɪʃən/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme predator, inflate, reef.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.