Biology B3 Part 6

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  • Created by: Sam
  • Created on: 22-04-12 12:07

Based on Edexcel textbook

pg 54-55 Courting behaviour

Male peacocks establish territory during the breeding season and then call peahens to them. The peahens visit a number of peacocks then make a decision on who to mate with. The decision is based on how impressive the males tail is and how many eye-spots it has. This is an example of courting behaviour. Attraction through display and selction of mate are important parts of the process and the result is sexual reproduction.

In species where males help rear offspring displays of how they will carry out parental duties is important.

Many woodland birds attract females using song. Each species will have a different song that the female of the corrosponding species will recognise as an invitation to vist while males will recognise it as a warning to stay away.

Phermones are also used to attract mates. Female silkmoths produce phromones which carry downwind to male silkmoths who can detect it through their very large antennae up to a couple of km away. Once they pick up the scent they travel towards her once arriving the female will usually choose her mate probably using the display of antennae as a guide because good antennae represents good health.

pg 56-57 Mating systems and parental care

Swans mate for life. Bahaviour between them keeps them together. The breeding season reinforces pair bonding.

Red deer do not show pair bonding. The males compete with each other for the best areas of the mating site where the most females are. Mating for the breeding season or life makes an animal monogamous (Both parents look after offspring). Having may mates within the breeding season is polygamous( male usually takes no role). These a two types of mating systems.

Parental care means feeding, protecting and helping offspring interact with others. This helps offspring to survive but takes effort on behalf of the parents…

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