2.4.2 reproductive behaviours and mating systems in animals Flashcards

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1
Q

what are mating systems based on

A

how many mates an individual has during one breeding season

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2
Q

what does monogamy mean

A

the mating of a pair of animals to the exclusion of all others

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3
Q

what does polygamy mean

A

individuals of one sex have more than one mate

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4
Q

what does polygyny mean

A

one male mates exclusively with a group of females

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5
Q

what does polyandry mean

A

one female mates with a number of males in the same breeding season

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6
Q

what can successful courtship behaviour in birds and fish be a result of

A

species specific sign stimuli and fixed action pattern responses

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7
Q

what does sexual selection select for

A

characteristics that have little survival benefit for the individual, but increase their chances of mating

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8
Q

what does sexual dimorphism mean

A

this is when there are distinct physical differences between the males and females of the same species. females are inconspicuous and males usually have more conspicuous markings, structures and behaviours

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9
Q

what does female choice involve

A

assessing honest signals of the fitness of males

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10
Q

what can honest signals indicate

A

favourable alleles that increase the chances of survival of offspring or a low parasite burden suggesting a healthy individual

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11
Q

what occurs in lekking species

A

males gather to display a lek where female choice occurs

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12
Q

what occurs during a lek

A

some birds will exhibit this behaviour. dominant males occupy the centre of the lek, with subordinates and juveniles at the fringes as satellite males. during the display, female choice occurs

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13
Q

what does the success in male male rivalry increase

A

the access to females for mating

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14
Q

what happens during male male rivalry

A

males will fight for dominance and access to females, often using elaborate weapons such as antlers, tusks, and horns.

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