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Egg survey

A systematic and scientific estimation of the abundance of eggs (and larvae) in an area, through sampling at the bottom or in the water column with appropriate devices (e.g. small meshed midwater trawls, plankton nets). Used to estimate the size of the spawning stock and the importance of spawning.

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Industry/Domain: History Category: World history

Nevsky, Alexander

Prince of Novgorod (r.1236-63). He saved Novgorod from attack by the Mongols in 1240 by becoming their vassal. He was rewarded by appointment as ...