Behaviour Flashcards
Who is Niko Tinbergen and what are his 4 questions include examples.
What are proximate and ultimate causes?
Founder of modern study of animal behaviour.
Causation- What causes the behaviour to happen? e.g. testosterone which causes courtship behaviour. Proximate
Function- How the behaviour contributes to the fitness and survival of an animal?, e.g. hiding the eggs which will proect them, ultimate cause
Development- Development of behaviour from young to adult, is it innate or a learning behaviour. Proximate cause
Evolutionary history- When did the trait originate, was it good for a species, ultimate cause
Proximate- understand the behaviour
Ultimate- why behaviour occurs.
Types of behavioural study (4)
Ethology- Diversity of species and nature, records natural behaviours.
Comparative psychology- general assumptions across all species and behaviour, often used in lab based.
Behavioural ecology- Fusion of ethology, ecology and evolutionary biology
Evolutionary psychology- interests in cognitive process.
What is homologous and analogous traits?
Homologous- Similar traits due to a common ancestor
Analogous- Similar traits due to the same or similar environment pressures on species leading to evolution
3 Ways evolution can occur?
Mutation- Caused by a mistake with the genetic coding during development, random, can be beneficial effects leading to natural selectin and evolution.
Genetic drift- Movement of traits by chance, more likely to effect smaller population, bottleneck effect.
Natural selection- Not random, adaptations to the environment
What is the bottleneck effect?
An extreme example of genetic drift when a population numbers are low.
Think of sweets in a jar, when poured only some will fall out including a range of traits and charactistics, some will be overrepresented others not at all in the new set of sweets/new population.
What is fitness?
How effective an individuals traits are at producing living, reproductive descendents in the current environment.
A more fit animal- lots of offspring, passing on its genes into the population
Optimal behaviour? include examples for M and F
The perfect balance of cost and benefits.
males:
-cost- sperm production
-benefit- large # of young production
Females:
-Cost- Copulation can be dangerous
-Benefit- High quality offspring
4 types of plasticity including 2 subtypes
Flexibility- how well can an animal perform in different environment
Acclimatisation- an individual adjusting to the different environment
Learning- an individual adjusting behaviour based on past experiences
Behavioural- ability for an animal to alter its behaviur based on internal and external stimuli. can be contextual plasticity (External stimuli leading to immediate behavioural response) or Development plasticity (one genotype leads to different behaviours as a result of prior stimuli)
What is return migration?
Single return migration?
R- Make regular repeated journeys to exploit resources for feeding and breeding
e.g. swallows and whales
S- Journey made once in a lifetime
e.g. salmon
Re migration?
Removal migration?
RE- some offspring make the return journey
REM- one way with no intention to return
e.g. humans
Complete migration?
Differential Migration?
Partial migration?
COM- All individuals and all population of a species do the same thing.
DIF- age and sexes do it diffently
PAR- different populations do it differently (Some may or may not migrate), e.g. roe deer
What is one way researchers can track migration?
Bird ringing
6 types of social systems
- Solitary (territorial)
- Solitary (Non territorial)
- Monogamous pairs (M and F, could be short or long term)
- Family (Kinship bases, e.g. elephants)
- Mulitple family groups (multiple kinship groups)
- Large colonies (arent necessarily related or have social system)
Costs of living in a group- 3
- Competition- Individuals compete for scarce materials in a group
- Disease- easiler transmission
- Mistakely feeding anothers offspring
Benefits of living in a group- 2
- Thermoregualtion- Cluster togther for warmth, increase survival
- Energetic of movement- slipstream, chores can be split reduces a single individuals enegry usage
Whats an ‘information centre’?
a theory where birds will roost with a community and previously unsuccessful birds will follow successful birds to get food, costly for the successful bird.
Why is foraging in larger groups more effective?
-Information centre
-Allows for exchange of information about foraging sites
-Local enhancement (checking areas where other individuals were successful)
-Social facilitation (Copying the behaviour of a successful forager
what is Kleptoparasites?
where individuals steal food from other members of the group, chance of this increases in larger groups.
Predation risk- cost (1) and benefits (5)
Cost:
- Easier to see large group
Benefit:
-Reduced encounter with predators, animals alone and sparsely distributed over an area compared to animals in groups clumped together in an area
-Easier to detect predators, ‘Many eyes’ hypothesis
-Dilution effect, in a large group there is a lower probability of being picked
-Confusion effect, Scatter or move as a group, causes confusion and famouflage.
-Group defence, attacking and defending as one.
What is Communication?
Process in which actors use specifically designed signals or displays to modify the behaviour of reactors and receivers
What are signals? and examples
displays which are designed for a specific purpose but others can use them for information
what are the 4 types of communication and Give 2 examples of communication?
Visual, auditory, chemical and tactile
Agression- disputes and fights, territory and social hierarchy
Courtship- Attracting a mate and deterring a rival
What is inclusive fitness, Direct and indirect fitness?
Inc- Selection acts on the gene not the individual, genotype is selected and passed on therefor offsprong share genes with parent
Dir- From offspring produced by an individual e.g. parent and offspring
Ind- Offspring produced by a relative because of you, relative passes on select genotype to offspring, e.g. sibiling helps increase own fitness as they pass on there gene as well as yours with reduced cost.
What is kin selection? and kin recognision?
Explains cooperation among related individuals through indirect benefits of inclusion fitness
The more of your genes that are in a relative the more interested you are in helping them as increased genetic benefit
kin- key for individuals to help relatives, to prevent helping non relatives, can be genetic links like scent or environmental cues like same nest.