Cefas Historic Secchi Depth Measurements

Elisa Capuzzo
Secchi depth measurements, collected for studying the effects of the light climate on pelagic fish (e.g. fish school position in the water column compared to the depth of penetration of light); The dataset comprise 470 Secchi depth measurements collected in 1931, 1937, 1946-1950, 1968. The coordinates of each observation were generally not indicated in the logbooks and were derived from the associated station-sheets. Occasionally the exact coordinates were not specified but only the location of...
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