Ducks Transporting Fresh-Water Clams

Manganese, a Normal Element in the Tissues of the Fresh Water Clams, Un10 and Anodonta

Manganese in the tissues of normal animals may be regarded as a rare element. In traces it is known to be present in a number of marine animals, as was shown by Pichard.’ Hoppe-Seyler2 is authority for the statement that it is not infrequently present in human blood and in the liver: but it is neither constant in its occurrence nor significant in amount. Among the lower animals there is at leas...

Waterfowl of North America: POCHARDS (Fresh Water Diving Ducks) Tribe Aythyini

Relative Foraging Value to Lesser Scaup Ducks of Native and Exotic Clams from San Francisco Bay

Invasions of exotic invertebrates have greatly altered many aquatic communities, but impacts on the foraging energetics of predators seldom have been assessed. In San Francisco Bay, California (USA), a major community change occurred with introduction of the Asian clam (Potamocorbula amurensis) in 1986. This species now greatly outnumbers the previous clam prey of a variety of sharks, rays, stu...

Freshwater clams as bioconcentrators of avian influenza virus in water.

We report experimental evidence for bioconcentration of a low-pathogenicity avian influenza virus (H6N8) in the tissue of freshwater clams. Our results support the concept that freshwater clams may provide an effective tool for use in the early detection of influenza A viruses in aquatic environments.

Chapter 7 Fresh Water Coordinating

7.4 Consequences for Human Well-being of Changes in the Provision of Fresh Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 7.4.1 Freshwater Provision: Benefits and Investment Requirements 7.4.2 Consequences of Water Scarcity 7.4.3 The Cost and Pricing of Water Delivery 7.4.4 Consequences of Too Much Water: Floods 7.4.5 Consequences of Poor Water Quali...