What are the costs and benefits of interactive aggregation?

Benefits

Protection from predators^ᛦ

Cooperative hunting^ᛦ

improved foraging^ᛦ

mate access^ᛦ

communal care^ᛦ

social transmission of info^ᛦ

Costs

increased competition^ᛦ

disease spread^ᛦ

cannibalism^ᛦ

inbreeding^ᛦ

obvious to predators^ᛦ

interference with reproduction^ᛦ

risk of inbreeding^ᛦ

Habitat has to support the entire group. E.g. otter family in ulu pandan had to move (not enough fish?)