Tut 2

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Submitted By 17586704
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Chicks behavioural response to external Stimuli

Devon Maxwell Anderson 17586704 BScAgric, Animal Production Systems and Aquculture, Stellenbosch, South Africa

As animals age they develop ways to best handle situations they encounter. The experiment was divided into two parts. For both parts we investigated the behavioural reactions of 1-2 day old chicks to external stimuli. Part 1 we noted any physical responses to the stimuli whereas in part 2 we noted the chick’s average cheeps per minute when encountering the stimuli. When examining the final results of the experiment it is plain enough to see the effects of the stimuli on the chicks. For part 1 there was only an average of 1 chick showing any form of response to the stimuli of the same size and colour whereas the stimuli that received the most behavioural reaction was that of the sight of another chick with an average of 2.7. For part 2 the highest value recorded was when the chick was left alone without any stimuli, with an average of 77.4 cheeps per minute. The lowest response was when a second chick was used as a stimulus with an average of 32.4 cheeps per minute being recorded. Looking at these results it is easy to interpret that the chicks are less distressed by the presence of other chicks and seek comfort and security in groups.

Naturally all living things adapt to best suite their environment. Evolution is loosely defined as the selection of animals with an increased fitness or possession of traits essential for survival through subsequent generations. Traits that contribute to the survival in the natural environment may include different strategies of behaviour (Marx et al., 2001). Animals will obviously have different reactions to different situations they encounter. In this experiment this selection is only made after the chick has considered the possible benefits and…...

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