1 Describe how the authors use previous research to explain the importance of their study.
Close relatives should gain inclusive fitness benefits according to kin selection theory. Nevertheless, the relationship between kin and non-kin, dominant and subdominant of wild fish such as Atlantic salmon is unclear. Recent research stated that related individuals show close relationship with another. And other study showed that related fish is not likely to be related (Griffiths and Armstrong 2002). Therefore, in this study, authors performed experiment to clarify the relationship and behaviours between dominant and subdominant, kin and non-kin groups.
2 What do the authors want to know?
Authors want to know whether kin pairs share more food than non-kin pairs and whether kin-biased threatening to subdominant fish exists even dominant fish is absent.
3 Briefly summarize their methods. …show more content…
Scientist repeated process to produce 2 families and split each family into two groups. Each family was put into different streams and two groups of each family were put into different locations which contained 250 fry at each location. After 4 months, took 10 fish from each of 4 groups and put them into separate 250-L tank. Then at each test arena, put pair of juvenile salmon whether kin or non-kin. And then scientists recorded their behaviours, interactions and positions within twelve days. In each test arena, scientists put food into two feeding patches. After 12 days, before put fish back to indoor stream, scientists measured size and weight of juvenile salmons. Totally, they tested 10 pairs of related pairs and 10 unrelated
Close relatives should gain inclusive fitness benefits according to kin selection theory. Nevertheless, the relationship between kin and non-kin, dominant and subdominant of wild fish such as Atlantic salmon is unclear. Recent research stated that related individuals show close relationship with another. And other study showed that related fish is not likely to be related (Griffiths and Armstrong 2002). Therefore, in this study, authors performed experiment to clarify the relationship and behaviours between dominant and subdominant, kin and non-kin groups.
2 What do the authors want to know?
Authors want to know whether kin pairs share more food than non-kin pairs and whether kin-biased threatening to subdominant fish exists even dominant fish is absent.
3 Briefly summarize their methods. …show more content…
Scientist repeated process to produce 2 families and split each family into two groups. Each family was put into different streams and two groups of each family were put into different locations which contained 250 fry at each location. After 4 months, took 10 fish from each of 4 groups and put them into separate 250-L tank. Then at each test arena, put pair of juvenile salmon whether kin or non-kin. And then scientists recorded their behaviours, interactions and positions within twelve days. In each test arena, scientists put food into two feeding patches. After 12 days, before put fish back to indoor stream, scientists measured size and weight of juvenile salmons. Totally, they tested 10 pairs of related pairs and 10 unrelated