Micronekton

Japanese: micronekton
Micronekton

...Other small groups include sand eels, anchovies, squid fish, scorpionfish, whalefish, bowfin fish, anglerfish, horseshoe fish, and owl eels, totaling about 1,000 species. The most abundant of these are the lanternfish, scorpionfish, and scorpionfish, many of which are less than 10 cm long and are collectively known as micronekton. They are important food sources for useful pelagic animals such as salmon, trout, squid, tuna, dolphins, whales, and fur seals. The mid- and deep-water regions are poor in food organisms, so the feeding habits of the fish that live there show two different adaptations.

From [Plankton]

...However, in reality, it often refers to aquatic organisms collected with plankton nets or buckets. In recent years, krill, crustaceans such as shrimp, and small fish such as lankton, which are intermediate between plankton and nekton in terms of mobility, are called micronekton and are studied as a branch of planktonology. The adaptation to a plankton life is the most striking feature of plankton.

*Some of the terminology that mentions "micronekton" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…そのほかにシギウナギ,ソコイワシ,デメエソの仲間,フリソデウオ類,クジラウオ類,ボウエンギョ類,チョウチンアンコウ類,カブトウオ類,フクロウナギ類などの少数群を合わせて合計約1000種が含まれる。なかでも生物量の多いのは,ハダカイワシ類,ヨコエソ類,テオノエソ類で,これらは体長10cm未満のものが多くマイクロネクトンmicronektonと総称され,サケ・マス類,イカ類,カツオ・マグロ類,イルカ,クジラ,オットセイ類などのような外洋性有用動物の重要な餌となっている。 中・深層は餌料生物に乏しいので,そこに生息する魚類の食性には二つの異なった方向への適応が見られる。…

【プランクトン】より

…しかし,実際的,現実的にはプランクトンネットやバケツなどで採集される水中の生物をさすことが多い。近年,移動力の点でプランクトンとネクトンの中間にあるようなオキアミ,サクラエビのような甲殻類,ハダカイワシのような小型魚類などをマイクロネクトンmicronektonと呼び,プランクトン学の一分野として研究されている。 浮遊生活への適応はプランクトンの最も著しい特徴である。…

※「micronekton」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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