Atlantic Bluefin Tuna vs Epaulard
Thunnus thynnus compared with Orcinus orca
Key Differences
- Atlantic Bluefin Tuna is Least Concern while Epaulard is Data Deficient.
- Epaulard is 21.6x heavier than Atlantic Bluefin Tuna.
- Epaulard lives longer (50 years vs 40 years).
Taxonomic Classification
| Rank | Atlantic Bluefin Tuna | Epaulard |
|---|---|---|
| Kingdom same | Animalia (動物) | Animalia (動物) |
| Phylum same | Chordata (脊索動物) | Chordata (脊索動物) |
| Class | Actinopterygii (Ray-finned Fish) | Mammalia (哺乳類) |
| Order | Perciformes (ペルカ目) | Cetacea (Whales & Dolphins) |
| Family | Scombridae (Tunas & Mackerels) | Delphinidae (Oceanic Dolphins) |
| Genus | Thunnus (Tunas) | Orcinus (Orcas) |
| Species | Thunnus thynnus | Orcinus orca |
Evolutionary Relationship
Atlantic Bluefin Tuna and Epaulard share a common ancestor at the Phylum level: Chordata. (脊索動物)
Conservation Status
Atlantic Bluefin Tuna
LC — Least ConcernTrend: Increasing ↑
Epaulard
DD — Data DeficientPopulation: ~50.0K
Trend: Unknown ?
Physical Characteristics
| Attribute | Atlantic Bluefin Tuna | Epaulard |
|---|---|---|
| Diet | Carnivore | Carnivore |
| Average Lifespan | 40 years | 50 years |
| Average Length | 2.5 m | 8.0 m |
| Average Weight | 250.0 kg | 5.4 t |
Habitat & Geographic Range
Atlantic Bluefin Tuna
Found across multiple habitat types including temperate coniferous forests, montane grasslands and shrublands, and Mediterranean forests and woodlands within the Palearctic biogeographic realm.
Distributed across Italy, Japan, Morocco, Spain, and United States.
Epaulard
Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.
Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Colombia, Ecuador, Venezuela).
Atlantic Bluefin Tuna
大西洋クロマグロ(Thunnus thynnus)は大西洋・地中海に生息する世界最大のマグロ類の一種で、体長3メートル・体重700キログラム以上に達する個体が知られる。IUCNレッドリストでは絶滅危惧(EN)に分類されており、寿司・刺身用として極めて高い市場価値を持ち、1尾が3億円以上で取引された事例もある。体温調節能力と高速遊泳能力(時速70キロ以上)を持つ、硬骨魚類の中でも異例の生理的能力を備えた種である。
Epaulard
イルカ科で最大の種であるシャチ(Orcinus orca)は体長最大9メートル、体重6トンに達し、北極から南極まですべての海洋に生息しています。独特の方言、狩猟戦略、集団間で異なる文化的伝統を持つ母系ポッドで生活する頂点捕食者です。一部の集団は魚類を、他の集団は海洋哺乳類を専門に捕食します。天敵はなく、シャチは生息するすべての海洋食物連鎖の頂点に位置します。
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