The inclusive fitness theory, formalized by Hamilton as the inequality R>c/b, explains that cooperation is favored by natural selection if relatedness is greater than the cost to benefit ratio. R is the relatedness parameter and is expressed as the fraction of genes shared between the altruist and the recipient due to their common descent. This [...]
Andrade’s article was fascinating! She explained a theory behind cannibalism as a favored sexual selection trait in male redback spiders. Andrade provided two main points that support sexual cannibalism: increased paternity and decreased likelihood of female remating. Males that were cannibalized spent a median of 25 minutes in copulation while males that survived spent [...]