The mean DO level for adult salmonids is 6.5 mg/L, and the minimum is 4 mg/L Â¹Â². These fish generally attempt to avoid areas where dissolved oxygen is less than 5 mg/L and will begin to die if exposed to DO levels less than 3 mg/L for more than a couple days Â¹â¹.n a stable body of water with no stratification, dissolved oxygen will remain at 100% air saturation. 100% air saturation means that the water is holding as many dissolved gas molecules as it can in equilibrium.
It is usually caused by the bite of a flea that has fed on an infected wild animal, such as a rat, chipmunk or prairie dog. It usually causes large sores and abscesses in the lymph nodes under the arms and legs. Dogs, and especially cats, can also become infected and can spread the disease to their human companions.iseases from rodents, pocket pets and rabbits. There are disease concerns with both wild (rats, mice) and pet (rats, mice, hamsters, gerbils, guinea pigs) rodents and rabbits. They can carry many diseases including hantavirus, leptospirosis, lymphocytic choriomeningitis (LCMV), Tularemia and Salmonella.
Unfortunately, in spite of all efforts, some causes of death remain undetermined. However, it is always good to pursue a cause of death for your own peace of mind and to protect other pets. General causes of sudden death can be grouped according to the organ system involved: Heart diseases. Cancer.