Western Blacknose Dace
探検魚類
Western Blacknose Dace
rhinichthys obtusus
The Western Blacknose Dace is a charming and resilient little minnow native to the cool, fast-flowing headwater streams of eastern and central North America. Known for its energetic behavior and distinct coloration, this small fish plays a crucial role in freshwater ecosystems, serving as an indicator of clean water and a vital link in the aquatic food web. Despite its small size, it is a hardy species capable of navigating turbulent currents with ease. During the spring breeding season, males undergo a stunning transformation, flaring with vibrant orange and red hues along their flanks to attract mates.
生息地: Found in cool, clear, fast-flowing streams and small rivers with gravelly or rocky substrates.
外見
This small minnow typically reaches 5 to 10 centimeters in length, featuring a slender, cylindrical body. It is characterized by a prominent dark, blackish lateral stripe that runs from the tip of its snout, through the eye, all the way to the base of the tail. Above this line, its back is an olive-green to dark brown color mottled with darker spots, while its belly is a contrasting silvery-white. During the breeding season, males develop bright red or orange coloration on their lower flanks and pectoral fins.
界Animalia門Chordata綱Actinopterygii目Cypriniformes科Leuciscidae属Rhinichthys
カテゴリ
魚類レア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
Because they require clean, cool, oxygen-rich waters to thrive, their presence is often used by biologists as an indicator of good stream health.
During the spawning season, males will vigorously defend small nesting territories over gravel beds from other rival males.
Their dark lateral stripe acts as a form of disruptive camouflage, making them difficult for aerial predators like kingfishers to spot from above.
特殊能力
能力
Torrent Navigation
Their streamlined, fusiform body shape allows them to maintain position and swim efficiently against strong river currents.
能力
Breeding Coloration Shift
Males develop brilliant, high-contrast orange-red lateral pigmentation to signal fitness and attract females during spring.
能力
Substrate Foraging
Utilizing specialized tactile and chemical receptors around their mouth, they easily detect hidden aquatic insect larvae under stream pebbles.
サイズと詳細
- 長さ
- 5+ cm
- 体重
- 0.002+ kg
- 寿命
- 2+ 年
- 一度の産卵数
- 5002000+
- 抱卵期間
- 7+ 日
食性と食事
Primarily feeds on small benthic invertebrates, especially aquatic insect larvae, but also consumes algae and diatoms from submerged rocks.
主な食物
- Midge larvae
- Mayfly nymphs
- Caddisfly larvae
- Diatoms
- Filamentous algae
採餌方法
- Foraging
生態系とのつながり
eaten by
Brook Trout
Salvelinus fontinalis
Predator that feeds on dace in cool-water streams.
competitor
Creek Chub
Semotilus atromaculatus
Competes with the dace for space and invertebrate prey in riffle habitats.
hunts
Chironomid Midge
Chironomus plumosus
Common prey item for Western Blacknose Dace in larval stages.
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
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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
Western Blacknose Daceを見分けるには？
Western Blacknose Dace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。
Western Blacknose Daceの長さは何ですか？
5+ cm
Western Blacknose Daceの体重は何ですか？
0.002+ kg
Western Blacknose Daceの寿命は何ですか？
2+ 年
Western Blacknose Daceは何を食べますか？
Primarily feeds on small benthic invertebrates, especially aquatic insect larvae, but also consumes algae and diatoms from submerged rocks.
Western Blacknose Daceは通常どこに生息していますか？
Found in cool, clear, fast-flowing streams and small rivers with gravelly or rocky substrates.
Western Blacknose Daceはどのように狩りをしますか？
Foraging
Western Blacknose Daceの一度の産卵数は何ですか？
5002000+
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