| 释义 |
Definition of nekton in English: nektonnoun ˈnɛktɒnˈnɛkt(ə)n mass nounZoology Aquatic animals that are able to swim and move independently of water currents. 〔动〕游泳生物，自泳生物。常与PLANKTON 相对 Often contrasted with plankton Example sentencesExamples - It is the region inhabited by plankton, which are minute organisms that drift or float at various depths in the water, and by nekton, which are free-swimming organisms.
- On average, collections were made every 3-4 d for phytoplankton and zoo-plankton, 7 d for benthos, and 10-14 d for nekton (fish and swimming benthic invertebrates).
- This may have made it the most easily accessible prey for predators in the nekton, such as fishes.
- Plants and animals arrive as plankton, nekton (free-swimming), fouling organisms (attached inside and on the hulls, propellers, and intake systems of vessels), and benthos (bottom dwellers).
- The subsequent evolution of the nekton is largely determined by a parallel development of the diversity of its components, which together reflect the pattern of sea level change.
Derivativesadjective Zoology Both nektonic and benthic forms are known, although both were motile to varying degrees. Example sentencesExamples - Such is the case with the great majority of marine crustacean species, which almost always pass through a planktonic larval existence before metamorphosing to benthic or nektonic adult forms.
- In fact, cephalopods themselves were the only Ordovician nektonic durophagous predators.
- This shows on one hand a strong correspondence of nektonic life with sea level changes and, on the other, the strong interrelationship (competitive and/or predatory) of the nektonic biota.
- Sponges, corals, bryozoa, gastropods, bivalves, and ammonoid and belemnite cephalopods all flourished, the latter two groups becoming the dominant nektonic invertebrates for the rest of the Mesozoic.
OriginLate 19th century: via German from Greek nēkton, neuter of nēktos 'swimming', from nēkhein 'to swim'. Definition of nekton in US English: nektonnoun Zoology Aquatic animals that are able to swim and move independently of water currents. 〔动〕游泳生物，自泳生物。常与PLANKTON 相对 Often contrasted with plankton Example sentencesExamples - On average, collections were made every 3-4 d for phytoplankton and zoo-plankton, 7 d for benthos, and 10-14 d for nekton (fish and swimming benthic invertebrates).
- The subsequent evolution of the nekton is largely determined by a parallel development of the diversity of its components, which together reflect the pattern of sea level change.
- Plants and animals arrive as plankton, nekton (free-swimming), fouling organisms (attached inside and on the hulls, propellers, and intake systems of vessels), and benthos (bottom dwellers).
- It is the region inhabited by plankton, which are minute organisms that drift or float at various depths in the water, and by nekton, which are free-swimming organisms.
- This may have made it the most easily accessible prey for predators in the nekton, such as fishes.
OriginLate 19th century: via German from Greek nēkton, neuter of nēktos ‘swimming’, from nēkhein ‘to swim’. |