Fish migrationDefinition (http://en.wikipedia.org/wiki/Fish_migration) Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousands of kilometres. Fish usually migrate because of diet or reproductive needs, although in some cases the reason for migration remains unknown. (Wikipedia) Preferred Units: N/A Scope Note: N/A This term is used for the following terms: N/A Approved Date 27-Nov-2013 Items having a keyword or observed-property relationship to this subject term Click here to give feedback on this term or suggest an update. |