1 Demodex is a mite that lives in small numbers in the skin of healthy dogs and cats without causing a problem. 2  Unhealthy dogs and cats, especially those with immune problems, Cushing's Disease, or on steroid medications can develop severe demodex infection.umans have their own form of demodex mite. The demodex mite is not rareâit is found in small numbers in the skin of most dogs and cats because the mites on their mothers normally travel to young pets shortly after birth.
- the hazard is growth of bacteria: 1  control measures are continuous recording of temperature (automatic) or visual control of icing of the fish. 2  the critical limit for fish temperature is 1 C. 3  a log on temperature and icing observations must be kept. 4  corrective action is checking of fish from period out of control, sorting and rejection of low ...
Critical depth as an aspect of biological oceanography was introduced in 1935 by Gran and Braarud. It became prominent in 1953 when Harald Sverdrup published the Critical Depth Hypothesis based on observations he had made in the North Atlantic on the Weather Ship 'M'.hen the mixed layer depth exceeds the critical depth, mixing of the water brings so much of the phytoplankton population below the compensation depth where photosynthesis is impossible that the overall population cannot increase in biomass.