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Hydrographical and biological observations in James River
Observations and experiments in collection of seed oysters in Corroto
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acres amount of precipitation April 16 August average Baylor survey bottom salinity bottom temperature bottom zone bushel of shells Chesapeake Bay Chuckatuck Creek Commission of Fisheries Corrotoman River counted crates Creek cultch decrease depleted depth distribution of setting eelgrass egg-crate collectors feet Figure found at Station high and low high water hydrogen-ion concentration inches intensity of setting James River July June June 17 large numbers lease located loose shells low water marks low-water mark low-water stages maximum middle miles mille Mulberry Island number of spat October oyster bottoms oyster larvae oyster producing oyster rocks oystermen period of observation plankton samples planters planting grounds public grounds Rappahannock River recorded season seed oysters setting occurred Shoal showed spat collectors spat per bushel spawning of oysters Station III Station VII straight-hinge larvae surface and bottom Table tide tion upper vertical distribution Wachapreague water temperature wire bag collectors young oysters