- isolume
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a map line connecting all points having same light intensity
Dictionary of ichthyology. 2009.
Dictionary of ichthyology. 2009.
Diel vertical migration — Diel vertical migration, also known as diurnal vertical migration, is a pattern of movement that some organisms living in the ocean and in lakes undertake each day. Usually organisms move up to the epipelagic zone at night and return to the… … Wikipedia