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.
Gas saturation decreases by 10% per meter increase in depth due to hydrostatic pressure Â¹Â². This means that if the concentration of dissolved oxygen is at 100% air saturation at the surface, it would only be at 70% air saturation three meters below the surface.ust as low dissolved oxygen can cause problems, so too can high concentrations. Supersaturated water can cause gas bubble disease in fish and invertebrates Â¹Â². Significant death rates occur when dissolved oxygen remains above 115%-120% air saturation for a period of time.