Redline Darter

nothonotus rufilineatus

The Redline Darter (Nothonotus rufilineatus) is a captivating freshwater fish native to the clear, rocky streams of the southeastern United States. Renowned for its vibrant coloration, particularly in breeding males, this small species plays a crucial role in its aquatic ecosystems as a benthic insectivore. Darters, in general, are known for their unique bottom-dwelling lifestyle, often 'darting' between rocks rather than swimming continuously. The Redline Darter exemplifies this behavior, utilizing its cryptic patterns and quick movements to navigate swift currents and ambush small invertebrates. Its presence is often an indicator of good water quality, making it a beloved species among naturalists and conservationists.

生息地: Found in clear, cool, moderate to swift-flowing streams and small to medium-sized rivers, typically inhabiting rocky riffles and runs with gravel or cobble substrates.

外見

The Redline Darter is a slender, elongated fish typically ranging from 5 to 7 centimeters in length. Breeding males are particularly striking, showcasing a brilliant blue-green body adorned with several distinct red-orange horizontal lines or spots along their flanks. Their fins, especially the dorsal and anal fins, are often edged or patterned with vibrant red, blue, and black bands. Females and non-breeding males are more subdued, exhibiting mottled brown and olive patterns with less intense coloration, providing effective camouflage against the rocky stream beds. They possess two distinct dorsal fins, characteristic of many darter species.

界Animalia門Chordata綱Actinopterygii目Perciformes科Percidae属Nothonotus

Redline Darter

カテゴリ

魚類

レア度

Common

危険度

1/5 · 非常に低い

スナップ

最初にスナップしよう！

おもしろい事実

Males are known to become highly territorial during the spawning season, vigorously defending their chosen nesting sites under rocks from other males.

Redline Darters spend most of their lives on the bottom of streams and rivers, 'walking' on their pectoral fins and only darting short distances when necessary.

The 'Redline' in its name refers to the distinctive red-orange lines or spots that adorn the flanks of breeding males, making them one of the most colorful darter species.

Their presence is often used as an indicator species for stream health, as they require clear, oxygen-rich waters with stable gravel substrates to thrive.

特殊能力

The Redline Darter possesses a mottled coloration that allows it to blend seamlessly with the rocky and gravelly stream beds, helping it avoid predators and ambush prey effectively.

Unlike many fish that swim continuously, darters exhibit a characteristic 'darting' behavior, using quick bursts of movement to move between rocks and hide from threats or catch unsuspecting invertebrates.

During spawning, females lay adhesive eggs on the undersides of rocks and pebbles, which are then fertilized and often guarded by the territorial males, increasing the survival rate of the offspring.

サイズと詳細

長さ: 5-7 cm
体重: 0.003-0.007 kg
寿命: 2-3 年
一度の産卵数: 50-300
抱卵期間: 7-14 日

食性と食事

The Redline Darter is a specialized insectivore, primarily feeding on a variety of aquatic insect larvae and small invertebrates found on the stream bottom.

主な食物

Mayfly larvae
Caddisfly larvae
Chironomid larvae
Stonefly nymphs
Small crustaceans
Aquatic worms

採餌方法

Foraging

生態系とのつながり

hunts

Mayfly

Ephemeroptera

A primary food source for the Redline Darter, its larvae are abundant in the same habitats.

hunts

Caddisfly

Trichoptera

Larval forms are a significant part of the Redline Darter's diet.

eaten by

Smallmouth Bass

Micropterus dolomieu

A common predator of darters, often sharing the same stream systems.

competitor

Greenside Darter

Etheostoma blennioides

Another benthic fish species that might compete for similar food resources and microhabitats.

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

Redline Darterを見分けるには？

Redline Darter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。

Redline Darterの長さは何ですか？

5-7 cm

Redline Darterの体重は何ですか？

0.003-0.007 kg

Redline Darterの寿命は何ですか？

2-3 年

Redline Darterは何を食べますか？

The Redline Darter is a specialized insectivore, primarily feeding on a variety of aquatic insect larvae and small invertebrates found on the stream bottom.

Redline Darterは通常どこに生息していますか？

Found in clear, cool, moderate to swift-flowing streams and small to medium-sized rivers, typically inhabiting rocky riffles and runs with gravel or cobble substrates.

Redline Darterはどのように狩りをしますか？

Foraging

Redline Darterの一度の産卵数は何ですか？

50-300