…The esophagus and stomach of these species are flexible, allowing them to swallow whole prey of the same size or even larger than themselves. The habitats of mesopelagic and deep-sea pelagic fishes are generally divided into the upper bathyal zone of 200-1000 m, which is generally influenced to some extent by sunlight, especially blue light; the lower bathyal zone of 1000-3000 m; the deep-sea zone from 3000 m to the ocean floor (5000-6000 m), where there is almost no vertical gradient in water temperature; and the deep-sea zone in the trench that cuts even deeper from the ocean floor. Fish in the upper bathyal zone include lanternfish, lancefish, lancefish, and luminous fish such as the crocodile fish and the lancefish. … *Some of the terminology used to refer to the "lower bathyal zone" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これらの種の食道や胃は伸縮自在で,自分と同程度またはそれ以上の大きさの餌でさえも丸のみにすることができる。 中・深層遊泳性魚類の生息空間は,一般に太陽の光,とくに青系の光の影響を多少なりとも受ける200~1000m層の上部漸深海帯,1000~3000mの下部漸深海帯,水温の鉛直勾配のほとんど見られぬ3000mから大洋底(5000~6000m)までの深海帯,大洋底からさらに深くきれ込んだ海溝部分の超深海帯に区分される。 上部漸深海帯の魚類には,ハダカイワシ,ヨコエソ,テオノエソ類,ワニトカゲギス・ホテイエソ類を代表とする発光魚が生息する。… ※「下部漸深海帯」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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