Roundtail Chub

gila robusta

The Roundtail Chub (Gila robusta) is a large, minnow-like freshwater fish native to the sprawling, unpredictable waters of the Colorado River Basin. Despite being a member of the minnow family, they can grow to impressive sizes, acting as a crucial intermediate predator in their native desert river ecosystems. Known for their resilience, these fish have evolved to thrive in environments characterized by extreme fluctuations in water flow, temperature, and turbidity. Historically referred to as the 'Colorado River Trout' by early pioneers due to their sporty fight and size, the Roundtail Chub remains an iconic symbol of the American Southwest's aquatic heritage, although they now face significant challenges from habitat alteration and invasive species.

生息地: Found in warm, rocky rivers and streams of the Colorado River Basin, typically preferring deep, slow-moving pools and eddies near boulders or overhanging vegetation.

外見

Roundtail Chubs feature a streamlined, thick-bodied profile with a slender caudal peduncle (the area just before the tail fin) and a deeply forked tail, built for navigating strong currents. Their coloration is typically olive-green to grey on the back, fading to silvery sides and a white belly. During the spawning season, adult males develop striking orange or red patches on their lower fins, cheeks, and belly. They possess a relatively large, terminal mouth without barbels and have small, finely textured scales.

界Animalia門Chordata綱Actinopterygii目Cypriniformes科Leuciscidae属Gila

Roundtail Chub

カテゴリ

魚類

レア度

Common

危険度

1/5 · 非常に低い

スナップ

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おもしろい事実

Early pioneers of the American Southwest often caught Roundtail Chubs for food, mistakenly calling them 'Colorado River Trout' because of their aggressive strike and fighting ability.

The Roundtail Chub can hybridize with closely related species like the Humpback Chub and Bonytail Chub, sometimes complicating conservation efforts.

They are broadcast spawners, meaning females release thousands of eggs over gravel beds into the current, leaving them completely unguarded to develop on their own.

特殊能力

Highly adapted to the extreme flood-and-drought cycles of desert rivers, able to find refuge during torrential floods and survive in isolated pools during severe droughts.

Possesses a deeply forked tail and streamlined body that allows for rapid bursts of speed to navigate turbulent rapids or evade predatory fish.

Able to seamlessly shift its diet based on seasonal availability, switching from aquatic insects to algae or small fish as river conditions change.

サイズと詳細

長さ: 25-45 cm
体重: 0.5-1.5 kg
寿命: 7-10 年
Top Speed: 20 km/h
一度の産卵数: 5000-40000
抱卵期間: 4-7 日
渡りの距離: 30 km

食性と食事

An opportunistic feeder that consumes a wide variety of aquatic and terrestrial prey alongside plant matter.

年齢による違い: Juveniles feed primarily on small aquatic insects and algae, while adults incorporate more small fish and larger invertebrates into their diet.

主な食物

Aquatic insects
Small fish
Crustaceans
Algae
Terrestrial insects

採餌方法

Foraging

生態系とのつながり

eaten by

Colorado Pikeminnow

Ptychocheilus lucius

Preyed upon by the native apex predator of the basin.

competitor

Brown Trout

Salmo trutta

Competes with and is preyed upon by non-native introduced sport fish.

hunts

Mayflies

Ephemeroptera

Feeds heavily on aquatic larvae found in the river substrate.

特徴

このオブジェクトにはまだ特徴バッジが割り当てられていません。

別名

まだ別名はありません。

コレクション

テーマが追加されると、このオブジェクトのコレクションがここに表示されます。

安全性

危険度

1/5 · 非常に低い

まだ特別な安全上の注意はありません。

よくある質問

Roundtail Chubを見分けるには？

Roundtail Chubを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。

Roundtail Chubの長さは何ですか？

25-45 cm

Roundtail Chubの体重は何ですか？

0.5-1.5 kg

Roundtail Chubの寿命は何ですか？

7-10 年

Roundtail Chubのtop Speedは何ですか？

20 km/h

Roundtail Chubは何を食べますか？

An opportunistic feeder that consumes a wide variety of aquatic and terrestrial prey alongside plant matter.

Roundtail Chubは通常どこに生息していますか？

Found in warm, rocky rivers and streams of the Colorado River Basin, typically preferring deep, slow-moving pools and eddies near boulders or overhanging vegetation.

Roundtail Chubはどのように狩りをしますか？

Foraging