Pit bull terriers, German shepherds, and Rottweilers were the offending breeds implicated in our study, and have accounted for the majority of dog bites according to other investigators.hese actions range from outright bans on the possession of pit bull-type dogs, to restrictions and conditions on pit bull ownership. They often establish a legal presumption that a pit bull-type dog is prima facie a legally dangerous or vicious dog.
Common causes of oxygen depletion include cloudy weath-. er, sudden death of algae or plants in the pond, and wind. mixing the pond water. Just two to three days of overcast. weather can cause oxygen production to diminish. When. the oxygen demand remains the same or increases, oxygen. levels begin to decrease.
A small amount of oxygen, up to about ten molecules of oxygen per million of water, is actually dissolved in water. Oxygen enters a stream mainly from the atmosphere and, in areas where ground-water discharge into streams is a large portion of streamflow, from groundwater discharge.n summer and fall, when the water temperature is high, the dissolved-oxygen concentration is low. Dissolved oxygen in surface water is used by all forms of aquatic life; therefore, this constituent typically is measured to assess the health of lakes and streams.