Fish migrations

Did you know that approximately 2.5% of all known fish species undergo migration at least once during their life cycle?

Migration is the synchronous, directed movement of a large segment of a population between discrete habitats. Although, the physical scale of migration may vary over four orders of magnitude, from hundreds of meters to thousands of kilometers. There are many challenges associated with migration, and numerous factors can influence the migratory success of individuals.

View article here:

http://www.sciencedirect.com/science?_ob=MiamiImageURL&_cid=280768&_user=143908&_pii=B978012374553800085X&_check=y&_origin=search&_coverDate=31-Dec-2011&view=c&wchp=dGLbVlS-zSkzS&md5=6c3d07177db4eaf3d2c20c9028943809/3-s2.0-B978012374553800085X-main.pdf

A glossary of terms used in the article:

Amphidromy	An uncommon subcategory of diadromy, in which there is a brief excursion from freshwater to seawater during the juvenile stage, but the majority of feeding and growth and spawning occur in freshwater.
Anadromy	Life-history strategy entailing reproduction and early rearing in freshwater followed by a significant growth phase in seawater.
Catadromy	A subcategory of diadromy, in which the majority of feeding and growth occurs in freshwater and the fully grown adult fish migrate to saltwater and reproduce.
Crepuscular	Occurring during twilight (dusk and dawn). Daily pattern with two peaks of activity centered around dusk and dawn, though not excluding some activity in between these periods. From Latin ‘crepusculum’ (twilight).
Diadromy	A category of migration, in which all migratory activity crosses the seawater/freshwater boundary.
Diel	Pertaining to a 24-h period.
Fluvial	Relating to a river, stream, or other flowing water.
Iteroparity	A reproductive strategy whereby an individual reproduces more than once within its lifetime.
Lateral line	Sensory structure consisting of a series of mechanoreceptor cells on the surface of the body of fishes and for detection of water motion relative to the body and low-frequency sound.
Migration	A regular directed movement of a group of animals.
Navigation	A mechanism whereby fishes plot a course to a particular location.
Oceanodramy	A category of migration, in which all migratory activity occurs in saltwater.
Orientation	A mechanism whereby fishes position themselves in a particular direction in response to an external stimulus.
Potamodromy	A category of migration, in which all migratory activity occurs in freshwater.
Rheotaxis	A directional preference to flowing water.
Semelparity	A reproductive strategy whereby an individual reproduces only once within its lifetime.