シャドーイング練習: Pufferfish | Masters of Self-Defense - 動画で英語スピーキングを学ぶ
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90 文
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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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このレッスンの語彙とスピーキングのポイント
繰り返し出てくる語は次のとおりです：pufferfish, species, predator, fish, reef。 この動画には、シャドーイング用の文が90文、単語が1276語あります。 音声の長さは8:54です。 話す速さは1分あたり約143語で安定しており、シャドーイングしやすいペースです。 英語の頻出3,000語に含まれる単語は77%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| pufferfish 名詞 | /ˈpʌfɚˌfɪʃ/ | フグ, 河豚 |
| predator 名詞 | /ˈpɹɛd.ə.tɚ/ | 天敵 |
| inflate 動詞 | /ɪnˈfleɪt/ | 膨らむ |
| reef 名詞 | /ɹiːf/ | 礁, 暗礁 |
| balloon 名詞 | /bəˈlun/ | バルーン, 気球 |
| breed 動詞 | /ˈbɹiːd/ | 育てる, 育成する |
| coral 名詞 | /ˈkɔɹəl/ | サンゴ, 珊瑚 |
| camouflage 名詞 | /ˈkæ.məˌflɑːʒ/ | 迷彩 |
| crustacean 名詞 | /kɹʌsˈteɪʃən/ | 甲殻類 |
| neurotoxin 名詞 | /ˈn(j)ʊɹoʊtɑksɪn/ | 神経毒 |
| scuba 名詞 | /ˈskuːbə/ | スキューバ |
| prey 名詞 | /pɹeɪ/ | 獲物 |
| adorable 形容詞 | /əˈdoɹ.əˌbəl/ | 可愛い |
| poison 名詞 | /ˈpɔɪ.zən/ | 毒 |
| belly 名詞 | /ˈbɛli/ | 胃, お腹 |
動画に出てくる句動詞
| 単語 | 意味 |
|---|---|
| check out 動詞 | 試験する, 検査する |
| stick out 動詞 | 突き出る |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | is also covered · are fused · are impressed |
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | has stumped · They've been introduced · have worked |
| 関係詞節 who / which + 節 — 人や物について情報を加える | balloon, which is · organs which is · puffer, which can |
注意したい発音
話し手はthey're, can't, haven'tなど、短縮形や弱形を13回使っています。聞こえたとおりの短い形で発音しましょう。
- 「sh」と「zh」の音: pufferfish /ˈpʌfɚˌfɪʃ/, camouflage /ˈkæ.məˌflɑːʒ/, crustacean /kɹʌsˈteɪʃən/, shade /ʃeɪd/, blowfish /ˈbloʊˌfɪʃ/
- 長い単語（アクセントの位置に注意）: neurotoxin /ˈn(j)ʊɹoʊtɑksɪn/, adorable /əˈdoɹ.əˌbəl/, delicacy /ˈdɛlɪkəsi/, intimidate /ɪnˈtɪmɪdeɪt/, invertebrate /ɪnˈvəːtɪbrət/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: coral /ˈkɔɹəl/, adorable /əˈdoɹ.əˌbəl/, fertilize /ˈfɜː(ɹ)tɪlaɪz/, resemble /ɹɪˈzɛmbəl/, translate /tɹænzˈleɪt/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: crevice /ˈkɹɛvɪs/, invertebrate /ɪnˈvəːtɪbrət/, invincible /ɪnˈvɪn.sə.bəl/, invasive /ɪnˈveɪsɪv/, dive /daɪv/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: pufferfish /ˈpʌfɚˌfɪʃ/, inflate /ɪnˈfleɪt/, reef /ɹiːf/, puffer /ˈpʌfɚ/, camouflage /ˈkæ.məˌflɑːʒ/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。pufferfish, predator, inflateなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。