Environmental Modification And Stress Management

Resumen

Two farmers in the same town keep the same breed of pig. One farmer's animals grow steadily and breed well through the hottest months of the year. The other's go off their feed every afternoon, pant in a huddle in the corner of a bare concrete pen, and take weeks longer to reach market weight. The difference is rarely the pig. It is almost always the shed: shade, airflow, spacing and a little water make the difference between an animal that copes with Nigeria's climate and one that is fighting it every single day.

In this lesson you will learn what environmental modification means and the practical methods a farmer uses to keep animals comfortable in both heat and cold, what stress in a farm animal actually is and the many things beyond climate that cause it, and the management practices that keep stress low enough for an animal to grow, breed and produce at its best.

Objetivos

  1. Define environmental modification
  2. State the methods of modifying the environment of farm animals
  3. Define stress in farm animals
  4. Explain the causes of stress in farm animals
  5. Explain the methods of managing stress in farm animals

Nota de la lección

A farm animal cannot step into the shade on its own the way a person can; it depends on the housing, spacing and handling the farmer provides. Every animal has a thermoneutral zone: the temperature range within which it keeps its body temperature steady without extra energy cost. Push it outside that zone, or add overcrowding or rough handling, and it responds with stress, diverting energy away from growth, milk, eggs and reproduction just to cope. Environmental modification keeps an animal inside its thermoneutral zone, and stress management is the wider set of practices that keep every other pressure on it low as well.

Evaluación de la lección

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  1. The range of environmental temperature within which an animal maintains its body temperature without extra energy cost is called the: A. Stress threshold B. Thermoneutral zone C. Stocking density D. Homeostatic range Answer: B
  2. Which of the following is a method of protecting farm animals from excess heat? A. Insulated, draft-free housing B. Deep dry bedding C. Sprinklers or misting D. A brooder lamp Answer: C
  3. Which of the following is NOT usually listed as a cause of stress in farm animals? A. Rough handling B. Balanced ration C. Overcrowding D. Transport Answer: B
  4. A poultry house measuring 6 metres by 4 metres is stocked using a general guide of 10 birds per square metre. How many birds does this guide recommend? A. 200 B. 240 C. 260 D. 300 Answer: B
  5. Which practice most directly reduces the stress of a long journey on transported livestock? A. Loud handling to keep animals alert B. Adequate rest stops for water and rest C. Mixing them with unfamiliar animals at each stop D. Withholding water until arrival Answer: B

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