Namibia: Understanding of Livestock-Environment Interaction

LIVESTOCK farming enterprises objectives are aimed at increasing and sustaining production, which in turn, exerts pressure on the animal’s physiological abilities to perform.

These performance aspects include reproduction, health, feed conversion, and general adaptability, among others.

The productivity of a livestock farm depends on three factors – the environment, the animal, and the applied management regime. When these factors are separated at any time, the animal’s productive potential may noticeably be compromised to some degree.

Further, the role of each of these factors in determining productivity is influenced by various attributes highlighted below.

THE ANIMAL

The productive ability of the animal is primarily influenced by its genetic make-up or, overall, by its breed type.

There are different livestock breeds with different structural and physiological abilities, which in turn influence their performances in any given environment.

The different breeds of animals differ in their abilities to adapt to the environment, feed conversion, and disease resistance, among others.

In addition, personal preferences, and management abilities also influence the breed of choice. However, the main driver of performance is genetic-environmental interaction. For example, sheep breeds such as the Damara and the Dorper carry different genetic attributes related to adaptability or weight gain that can be used as measures of performance given the production objectives and the environment.

THE ENVIRONMENT

The production environment has a significant influence on the animal’s performance. This is primarily attributed to climatic conditions, such as temperature and rainfall, the landscape or topographic features, such as mountains and plains, and lastly, the availability or quality of resources such as forage and water.

The animal’s performance and survival are dependent on its ability to withstand or adapt to changes in environmental conditions. However, animals that are native to the environment perform well compared to the non-natives.

Moreover, adaptability is both on spatial and temporal scales. As a result of genetic-environmental interaction, an animal may adjust or adapt to a new environment when exposed to it over time, due to its genetics being influenced to express adaptive traits.

It is also common that the productive potential of non-native animals is compromised, or in extreme cases, succumbs to harsh environmental conditions.

MANAGEMENT

A livestock management plan should be based on the production objectives and set targets. Thus, to achieve those, specific activities are expected to be performed.

The management regime should be aimed at harmonizing the interaction of the animal’s genetics with its environment to ensure that the production objectives and targets are achieved.

This includes practices such as health maintenance, feed and water provision, and general animal welfare (shelter) to ensure that the animal performs optimally.

The farming objectives are also influenced by the market, which also leads to the introduction of animal breeds that would meet specific market demands, which in turn exert pressure on the animal and the environment.