. Julu 'August 'September October November December JanuarL| FebruarL| March April Mat] June Fig. 17. Seasonal variation in plant pigments per m.^, in the three oceanic regions compared, means of 50-0 m. hauls at mean dates. For numbers of observations see Figs. 10-12. Thick line: Northern Region. Thin line: Intermediate Region. Pecked line: Southern Region.

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti