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diadromous

diadromous

1 9.9
Fish that move between rivers and the sea during their life
  • adjective
  • /ˌdaɪəˈdrɒməs/
  • Specialized
: diádromo
  • During their life cycle, many diadromous fish travel from freshwater rivers to the ocean and back again.
  • diadromous fish
  • diadromous species

Examples

  • The native diadromous fish species were sampled with varying abundances and distributions among 118 sample sites (Table 1, Figure 2).

    Academic text (2013)
  • As water levels recede to ancient points and diadromous fish begin to migrate between saltwater and freshwater once again, a past riverscape is revealed.

    Academic text (2018)
  • Water pollution also has reduced runs of diadromous fish.

    Academic text (2009)
  • We identified 24 diadromous fishes in the North Atlantic.

    Academic text (2009)
  • Finally, diadromous species have played important roles for both indigenous and nonindigenous peoples.

    Academic text (2009)
  • For those diadromous fishes for which data exist, we show that populations have declined dramatically from original baselines.

    Academic text (2009)
  • Because the spawning aggregations of diadromous fishes often place them within easy reach of humans, these runs have been particularly important sources of protein.

    Academic text (2009)
  • Dams also have numerous other ecological effects on rivers, many of which may affect diadromous fishes directly or indirectly.

    Academic text (2009)
  • Comparisons of landings between diadromous fish taxon pairs from both sides of the Atlantic often show similar patterns (Figure 1).

    Academic text (2009)
  • On average, marine species made up the majority (86.7%) of organisms covered in the awareness campaigns, followed by diadromous species (7.6%) and freshwater species (5.7%).

    Academic text (2011)

Surface Forms

diadromous positive

Morphology

diadromous = dromous (opaque) = dia + drom + ous

The term is formed from technical Greek combining forms ('dia-' + 'drom-') and yields a specialized biological meaning that is not obvious to average learners.

Etymology

Diadromous comes from Greek parts dia- 'between' and dromos 'running' or 'course'. So a diadromous fish 'runs' or moves between fresh and salt water during its life, which is why the word means migrating between rivers and the sea.