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Articles 5851 - 5863 of 5863

Full-Text Articles in Life Sciences

The Shrimp Fishery In North Carolina Considered In Terms Of Productivity Potentialities, Marshall Nelson, Virginia Fisheries Laboratory Jan 1948

The Shrimp Fishery In North Carolina Considered In Terms Of Productivity Potentialities, Marshall Nelson, Virginia Fisheries Laboratory

Reports

No abstract provided.


Report On Past And Current Fisheries Research Activities Directly Relating To Virginia, Nelson Marshall Jan 1948

Report On Past And Current Fisheries Research Activities Directly Relating To Virginia, Nelson Marshall

Reports

No abstract provided.


Ecological And Physiological Studies Of The Effect Of Sulfate Pulp Mill Wastes On Oysters In The York River, Virginia, Paul Galtsoff, Walter Chipman Jr., James B. Engle, Howard N. Calderwood Jan 1947

Ecological And Physiological Studies Of The Effect Of Sulfate Pulp Mill Wastes On Oysters In The York River, Virginia, Paul Galtsoff, Walter Chipman Jr., James B. Engle, Howard N. Calderwood

VIMS Articles

This study of the York River and issues impacting the oyster fishery provides historical information on the river's physical and chemical conditions (temperature, salinity, dissolved oxygen, turbidity, currents, etc.) effluent observations, history and data of the oyster fishery, oyster condition, biological and pathological work and experimental studies.

The project studies were responsible for the establishment of a fisheries laboratory in Yorktown, Va.

p. 59 - "Funds for the York River investigations were made available in 1935 by a special allotment from the Public Works Administration. Continuation of the project was made possible by regular allotments by the Bureau of Fisheries …


The Biology And Conservation Of The Blue Crab, Callinectes Sapidus Rathbun, Curtis L. Newcombe Jan 1945

The Biology And Conservation Of The Blue Crab, Callinectes Sapidus Rathbun, Curtis L. Newcombe

Reports

No abstract provided.


The Nutritional Value Of Seafoods, Curtis L. Newcombe Jan 1944

The Nutritional Value Of Seafoods, Curtis L. Newcombe

Reports

No abstract provided.


The Biology And Conservation Of The Blue Crab, Curtis L. Newcombe Jan 1943

The Biology And Conservation Of The Blue Crab, Curtis L. Newcombe

Reports

No abstract provided.


Letter To Jane Claire Dirks Acknowledging Smithsonian Specimen Contributions, Paul Bartsch Apr 1941

Letter To Jane Claire Dirks Acknowledging Smithsonian Specimen Contributions, Paul Bartsch

Jane Claire Dirks-Edmunds Documents

Many of the specimens collected by Jane Claire Dirks (later Jane Claire Dirks-Edmunds) went on to become part of her colleagues' collections. In this letter, Paul Bartsch, Curator of the the Divisions of Mollusks and Cenozoic Invertebrates at the Smithsonian Institution, thanks Dirks for shells she sent to the museum.


Introduction To The Study Of Virginia Fisheries, Virginia Fisheries Laboratory Jan 1940

Introduction To The Study Of Virginia Fisheries, Virginia Fisheries Laboratory

Reports

Article No. 1 of Educational Series A on Aquatic Biology issued by the Virginia Fisheries Laboratory of the College of William and Mary and the Commission of Fisheries in Virginia.


The Effects Of Vitamins "A" & "D" Deficient Diets On Crayfish, Joseph Hale Aug 1936

The Effects Of Vitamins "A" & "D" Deficient Diets On Crayfish, Joseph Hale

Masters Theses & Specialist Projects

The literature on vitamins shows that the greater number of the studies made of vitamin "A" and "D" deficient diets have been confined to their efforts on the vertebrates. Only a few controlled experiments have been conducted to determine the effects of vitamin "A" and "D" deficient diets on the invertebrates.

The purpose of this investigation was to determine the effects of vitamin "A" and "D" deficient diets on crayfish.


Some Monogenetic Trematodes From The Galapagos Islands And The Neighboring Pacific, Frank Grose Meserve Aug 1935

Some Monogenetic Trematodes From The Galapagos Islands And The Neighboring Pacific, Frank Grose Meserve

School of Biological Sciences: Dissertations, Theses, and Student Research

Introduction

Trematodes are parasitic, unsegmented, flattened (rarely cylindrical) worms. They have ventral, anterior, posterior or median attachment organs. The sense organs are poorly developed. The mouth is terminal or ventral and subterminal. The intestine is usually forked with or without lateral branches. The animals, with few exceptions, are hermaphroditic. The ovary is usually single. They have one, two, or more testes. The development is direct with only one host in the ectoparasitic Monogenea and indirect in the Digenea which have two or more hosts. The digenetic trematodes usually parasitize vertebrates which serve as their primary hosts and invertebrates (Mollusca) which …


Bacteria & Nitrate Nitrogen Content Of The Water Of Barren River, Gilbert Westerfield Aug 1934

Bacteria & Nitrate Nitrogen Content Of The Water Of Barren River, Gilbert Westerfield

Masters Theses & Specialist Projects

A quantitative study of bacteria and nitrogenous compounds of Barren River in Warren County, Kentucky, was undertaken to determine the relation between the number of bacteria and the amount of nitrate nitrogen found.


The Bottom Fauna Of Drakes Creek: A Quantitative & Qualitative Study, Theodore Milam Jun 1934

The Bottom Fauna Of Drakes Creek: A Quantitative & Qualitative Study, Theodore Milam

Masters Theses & Specialist Projects

An ecological study of the invertebrate animal forms exclusive of microscopic forms found in the waters of Drakes Creek in Warren County, Kentucky, was undertaken for the purpose of determining both the nature and amount of invertebrate animal life found in these waters. The Kentucky Fish and Game Commission has made several plantings of game fish in the waters studied. However, the fishermen report no appreciable increase of the fish life in these waters. In view of the failure of the fish to propagate properly in these waters, and because the other physical factors appeared favorable for the propagation of …


Some Digenetic Trematodes From Deep-Water Fish Of Tortugas, Florida, Harold W. Manter Jan 1934

Some Digenetic Trematodes From Deep-Water Fish Of Tortugas, Florida, Harold W. Manter

Harold W. Manter Laboratory: Library Materials

Introduction (first two paragraphs)

The parasitic fauna of ocean depths is practically unknown. Although an extensive fish population occurs at all depths, very little study has yet been made on the helminths of these fish. During the summers of 1930, 1931, and 1932 excellent opportunity was offered for the collection of parasites from fish trawled from depths varying from 40 to 582 fathoms at Tortugas, Florida. A considerable number of systematic hauls by the staff and crew of the Tortugas Biological Laboratory of the Carnegie Institution of Washington yielded an abundance and considerable variety of fish, some of rare forms, …