2006-07-22 03:55:24 · 4 answers · asked by sweety gomes 1 in Science & Mathematics ➔ Zoology
The upstream movement of aquatic animals is called anadromy, a term which comes from Greek 'ana' = upwards + 'dromos' = course, race. The opposite movement, i.e. downstream migration, is called catadromy ('cata' = downwards). The species are called anadromous or catadromous, respectively.
In addition, amphydromous species are those that migrate between the ocean and freshwater for purposes other than breeding, especially feeding (trophic migrations).
All these migration patterns are included in the broader term "diadromy".
"Migration" is a broader term, because it refers to any displacement of animals that is usually periodic (=repeated at constant intervals, for example, seasonally); it may be for the purpose of feeding (trophic migration), reproduction (reproductive, breeding or spawning migration), or other.
2006-07-22 06:54:08 · answer #1 · answered by Calimecita 7 · 4⤊ 0⤋
The UPSTREAM movement of fish is called migration. They go back up-stream to lay their eggs and croak.
2006-07-22 11:00:53 · answer #2 · answered by Joe E 4 · 0⤊ 0⤋
spawning or migrating
2006-07-22 10:58:47 · answer #3 · answered by Gustove 3 · 0⤊ 0⤋
migration?
2006-07-22 10:58:59 · answer #4 · answered by ironcityveteran 5 · 0⤊ 0⤋