Environmental Characteristics of a River Estuary

The Patuxent River is one of the larger tributaries of the Chesapeake Bay. It has its origin in the north-central part of Maryland at an altitude of about 800 feet and empties into the western side of the bay at a point about halfway between the mouth and upper limits of the bay. Its basin is a hilly, rolling country without lakes and is characterized by low shores that rise gently toward the i…

Biological Results of The Snellius Expedition: V. The Dromiacea, Oxystomata, …

The present paper deals with the material of the Brachyura of the tribes Dromiacea, Oxystomata, and Oxyrhyncha obtained by the Snellius Expedition and placed at my disposal through the kindness of Prof. Dr. H. Boschma. At the same time it contains some remarks on the material of the Rijksmuseuin van Xatuurlijke Historic at Leiden.

Variations in The Phosphorus Content of Estuarine Waters of The Chesapeake Ba…

Studies by Cowles and Brambel (1938), Newcombe and Lang (1939), and Newcombe, Horne and Shepherd (1939) have provided information on the quantitative methods for estimating inorganic phosphorus and, also, on the vertical and horizontal distribution of this nutrient substance in the waters of the Chesapeake Bay. A continuation of distributional work has provided definite information on the …

A Study of Variability in Plankton Townet Catches of Pacific Pilchard (Sardin…

During the pilchard spawning season of 1940 the United States Fish and Wildlife Service, in collaboration with the Scripps Institution of Oceanography, made periodic surveys of part of the pilchard spawning area in an attempt to make quantitative evaluations of egg deposition. In addition to estimating the number of eggs deposited in the entire survey area during the season, it was desired to …

A Possible Function of Bioluminescence

It has been found difficult in many cases to conceive a use of the light to the luminescent organism, despite the large number of possibilities of ecological significance which have been suggested (vide Mangold, 1910, pp. 326-32; Kemp, 1910, p. 649; Putter, 1911, p. 487; Harvey, 1920, pp. 81-4; Rauthcr, 1927, pp. 162-6; Harvey, 1942, pp. 58-87). This difficulty has led to the conclusion by some…

The Ratio Of Carbon Dioxide Consumption To Oxygen Evolution In Sea Water In T…

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A Momentum Integral For Surface Waves in Deep Water

It has been demonstrated by the studies of Stokes (1847) and Lcvi-Civita (1925) that surface waves of finite height which are irrotational and periodic can exist in a liquid under the influence of gravity. Furthermore, it was pointed out by Stokes that such waves produce a transport of mass in the direction of propagation and hence possess a certain horizontal momentum relative to the undisturb…

The Diatoms Collected By The U. S. S. Cacopan In The Antarctic In 1947

For investigation of the Diatomaceae, a series of water samples was collected from the U. S. S. Cacopan by filling a citrate bottle either with surface water obtained with a bucket or with water obtained from various depths with Nansen bottles. The positions at which samples were collected in the Antarctic are plotted on Fig. 1. Of the main previous Antarctic Expeditions (Challenger, Deuts…

Annales Bogorienses A Journal Of Tropical General Botany Being A Continuation…

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Instituut Voor De Zeevissch Eru

Er zijn weinig Javaansche bedrijven, die zoo cenzijdig en wisselvallig blij- ken te zijn en waaraan zooveel inoeilijkheden zijn verbonden. als het door zeil- prauwen uitgeoefende zeevisscherijbedrijf. 1) Bij hooge zee of bij sterke tegen- wind kan niet worden uitgevaren. Soms kan door plotselinge windstilte het vischwater niet tijdig worden bereikt, dan wel kan men door den sterken stroom …