K selected and R selected species

First three characteristics of a R-selected species = FSS

Faster reproductive strategies Smaller body size short Life span

First three characteristics of a K-selected species = SLL

Slow reproductive strategies Large body size Long Life span

What species are classed as K-selected?

Species that are suited in their life history to maintain a stable population with low fluctuations.

What are R selected species classed as?

Species that are suited in their life history to rapid population growth. eg rats, mice and rabbits

Last 4 characteristics of a K-selected species = TlSoHpHs

Take a long time to sexually mature Small number of offspring High levels of parental investment Higher survival rate

Last 4 characteristics of a R-selected species = TsLoLpLs

Take a shorter time to sexually mature Large numbers of offspring low levels of parental investment Lower survival rate

What is significant about k-selected species?

Their population will sit around the carrying capacity for that area. eg elephants, whales and humans