Animal Sciences Commons^™

A Study Of The Tolerance Of Certain Species Of Fishes For Low Dissolved Oxygen & Increased Carbon Dioxide Concentrations, Charles Allen

Masters Theses & Specialist Projects

Extensive investigations have been made of the oxygen end carbon dioxide content of water in which fishes live. A review of the literature, however, shows that these studies have not been made under controlled laboratory conditions dealing with the species studied in this investigation. It was the purpose of this study to determine the lowest concentration of dissolved oxygen that will support certain species of fishes and, also, the lethal effects resulting from increased carbon dioxide tension as determined under carefully controlled laboratory conditions.

Reglamento General Para La Pesca De La República De Cuba, República De Cuba. Secretaría De Agricultura, Comercio Y Trabajo

Mario Diaz Cruz Pamphlets

Publicado en "Gaceta Oficial" el 28 de Mayo de 1923

A New Method For The Quantitative Determination Of Plankton Hauls, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

Only two methods of estimating the quantity of plankton obtained in a haul of the vertical net are known to me. These two may be called the volumetric and the gravimetric. Both have been used by observers in various parts of the world, but so far as I know have never been comparatively tested in order to ascertain the relative value of results obtained by the two. The experience of the past year has shown some disadvantages in the first method, while the second has certain evident objections which rendered its employment in this case out of the question. In …

The Food Supply Of The Fish In The Great Lakes, Henry B. Ward

Studies from the University of Nebraska Zoological Laboratory

When the early settlers made their homes along the shores of the Great Lakes, the waters of these inland seas teemed with fish. A cheap and apparently inexhaustible supply of food lay within easy reach, and they drew from it unstinted, nor was it strange that, with the increasing population and ever-widening means of communication, delicacies so tempting as the whitefish and lake trout were eagerly sought after in the markets of the neighboring cities, and that the ingenuity of generations of fishing folk was taxed to invent means of securing the fish-until finally, in the face of a growing …

How The U.S. Fish Commission Works, Franklin Benner

Journal of the Minnesota Academy of Science

No abstract provided.

De Bestiis Marinis Or, The Beasts Of The Sea, Georg Wilhelm Steller

Zea E-Books in American Studies

Steller’s classic work, published in Latin in 1751 and in German in 1753, contains the only scientific description from life of the Steller’s sea cow (Hydrodamalis gigas), as well as the first scientific descriptions of the fur seal or “sea bear” (Callorhinus ursinus), Steller’s sea lion (Eumetopias jubatus), and the sea otter (Enhydra lutris).

Steller’s sea cow was a sirenian, or manatee, inhabiting the North Pacific Ocean and Bering Sea. It was first discovered by Europeans in 1741 and rendered extinct by 1768. It was a 30-foot long, plant-eating aquatic mammal, weighing …