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Japanese horseshoe crabs inhabit the muddy bottoms of tidal flats.
日本のカブトガニは干潟の泥の溜まった海底に生息します。
They reach their spawning season in summer, and the laid eggs hatch in a few months, undergoing several moltings before becoming adults.
夏に産卵期を迎え、産卵された卵は数ヶ月で孵化し、十数回の脱皮を経て成体になります。
They were once abundant in the Seto Inland Sea in Japan, but they were considered nuisances.
日本では古くは瀬戸内海に多かったが、役に立ちませんでした。
Their large size made them disliked in fishing as they would tear nets.
図体が大きく漁では網を破るなど嫌われていました。
However, the Japanese horseshoe crab is a "living fossil" that strongly retains the appearance of its ancient counterparts from the Paleozoic era.
しかし、カブトガニは古生代の仲間の風貌を色濃く残した「生きた化石」です。
Some locations have been designated as natural monuments due to their academic significance.
学術的な面から貴重であるとして天然記念物の指定を受けた場所もあります。
In recent years, their numbers have drastically declined in various areas due to environmental pollution and land reclamation.
近年では環境汚染や埋め立てによって各地でその数を激減させています。
単語
| 英単語 | 日本語の意味 | 品詞 | 英語例文 |
|---|---|---|---|
| Japanese horseshoe crab | 日本のホシガイ | 名詞 | The Japanese horseshoe crab is considered a living fossil in the Seto Inland Sea. 日本のホシガイは瀬戸内海において生きた化石と見なされています。 |
| tidal flat | 干潟 | 名詞 | Tidal flats serve as habitats for many bird species. 干潟は多くの鳥の種の生息地として機能しています。 |
| spawning season | 産卵期 | 名詞 | The spawning season for fish is from spring to summer. 魚の産卵期は春から夏にかけてです。 |
| melt | 脱皮 | 動詞 | Crabs molt their shells when they grow. カニは成長するときに殻を脱ぎます。 |
| adult | 成体 | 名詞 | Adult fish live underwater. 成体の魚は水中で生活しています。 |
| nuisance | 迷惑 | 名詞 | The increase in marine life can be a nuisance to fishing. 海洋生物の増加は漁業にとって迷惑です。 |
| fish | 漁業 | 動詞 | They fish every day. 彼らは毎日漁をします。 |
| tear | 破る | 動詞 | He accidentally tore the net. 彼はうっかり網を破りました。 |
| living fossil | 生きた化石 | 名詞 | Horseshoe crabs are considered living fossils. ホシガイは生きた化石とされています。 |
| Paleozoic era | 古生代 | 名詞 | Many ancient organisms existed in the Paleozoic era. 多くの古代生物が古生代に存在しました。 |
| natural monument | 天然記念物 | 名詞 | The Seto Inland Sea is one of Japan's natural monuments. 瀬戸内海は日本の天然記念物の一つです。 |
| academic significance | 学術的重要性 | 名詞 | This discovery has academic significance. この発見には学術的な重要性があります。 |
| decline | 減少 | 動詞 | The number of fish is declining. 魚の数が減少しています。 |
| environmental pollution | 環境汚染 | 名詞 | Environmental pollution affects the ecosystem of tidal flats. 環境汚染が干潟の生態系に影響を与えます。 |
| land reclamation | 埋め立て | 名詞 | Land reclamation has reduced the area of tidal flats. 埋め立ては干潟の面積を減少させました。 |
問題
Japanese horseshoe crabs inhabit the muddy bottoms of tidal flats. They reach their spawning season in summer, and the laid eggs hatch in a few months, undergoing several moltings before becoming adults. They were once abundant in the Seto Inland Sea in Japan, but they were considered nuisances. Their large size made them disliked in fishing as they would tear nets. However, the Japanese horseshoe crab is a "living fossil" that strongly retains the appearance of its ancient counterparts from the Paleozoic era. Some locations have been designated as natural monuments due to their academic significance. In recent years, their numbers have drastically declined in various areas due to environmental pollution and land reclamation.
1.
When do Japanese horseshoe crabs reach their spawning season?
a) Winter
b) Spring
c) Summer
d) Autumn
2.
What has led to the decline in the numbers of Japanese horseshoe crabs in recent years?
a) Overfishing
b) Climate change
c) Environmental pollution and land reclamation
d) Loss of habitat due to natural disasters
答え
1.
When do Japanese horseshoe crabs reach their spawning season?
日本のカブトガニはいつ産卵期を迎えますか？
a) Winter 冬
b) Spring 春
c) Summer 夏
d) Autumn 秋
2.
What has led to the decline in the numbers of Japanese horseshoe crabs in recent years?
近年、日本のカブトガニの数が減少したのは何が原因ですか？
a) Overfishing 過剰な漁獲
b) Climate change 環境汚染と土地開発
c) Environmental pollution and land reclamation 気候変動
d) Loss of habitat due to natural disasters
自然災害による生息地の消失
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