The effects of predation and inbreeding depression on the viability of a small population: analysis of a mathematical model

Article Abstract:

Viability of small populations depends largely on the interaction between demographic and genetic factors. Hartt and Haefner's numerical model demonstrates that inbreeding depression does not disturb the equilibrium of the prey population but decreases the size of the predator population. Wildlife managers studying the impact of inbreeding depression need to research the population dynamics of a single species in the context of the ecosystem in which they exist. The model also predicts the effects of any deviation in the natural system from the size of the equilibrium population.

Models, Environmental aspects, Predation (Biology), Animal populations, Inbreeding, Population biology

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Population growth and farm output analyzed

Article Abstract:

The Food and Agriculture Organization (FAO) is carrying out a project in Ghana to look into population growth and farm output scenarios. Data reveal that natural population growth will increase 2.85% annually between 1985 and 2000. A 5% cut in fertility will lessen Ghana's trade deficit by twice the foreign debt service. Agricultural production is not anticipated to increase more than 3.8% but food demand was seen to swell to more than 2.5%. The research also observed that an 11% economic growth rate is needed to meet 90% of the population's nutritional necessities.

Food and nutrition, Ghana, Food and Agriculture Organization of the United Nations

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