disease populations

The main causes for disease in fishes are viruses and bacteria. IPN (Infectious Pancreatic Necrosis) and VHS (Viral Haemorrhagic Septicaemia) are well known diseases. Pollution of water causes great harm to the fish population. Fertilizers, pesticides, effluents and ch..

Suppose that the fish population in a lake was attacked by a disease, and the number of fish died is growing exponentially. If the number of fish died, increases from 100 to 200 in 50 days, how much time will it take before 400 are died? => 120 days or 130 days or 100 days or 90..

.g., low temperature and high humidity favour asthma, coastal climate favouring elephantiasis, heavy rainfall favouring malaria. Recent spread of mosquito borne diseases like malaria in US and dengue in India are examples of spread of tropical habitat northward favouring growth and develo..

A British economist Malthus'(1778) proposed a theory that population grows at geometric proportion and after the imbalance between population and resources is set in, population is automatically checked by natural disasters (like famine, epidemic, disease..

Malthus' Theory of Population - A British economist Malthus'(1778) proposed a theory that population grows at geometric proportion and after the imbalance between population and resources is set in, population is automatically checked by natural disasters (li..

. Reduced care of young ones leading to increased child health problems as well as vulnerability of children to many diseases. Reduced health care to mothers. Difficulties encountered in implementation of all national and state developmental programmes. Increased government expenditure. I..

The prawn population in a lake at time t = 0 was 200. Due to the attack of a disease, the prawns ceased to reproduce. If the death rate is (0.0004)P, then what is the prawn population after 50 months? [P = P( t ) is the prawn population after t months.] => 20..

Abiotic factors like temperature, wind, humidity, rainfall, intensity of light has its effect on the density of population. Biotic factors like organisms of other species living in the same area affect the population, as they involve in different types of food relationships. Fo..

Bio - war refers to biological war. It means that biological organisms are used as weapons to carry out the war. It is latest form of war. It is carried out by spreading the pathogens in specific part of geographical region to deliberately spread a deadly disease. The diseases s..

Living organisms do not survive indefinitely. Every organism dies after attaining a certain age or due to predation, disease, accident or other factors. The reduction in the number of individuals of a population as a result of death, is restored by the addition of new individual..