1) Intraspecies 
Interactions within a species. For example, one collared lizard fighting another collared lizard for a territory or breeding/mating is an intraspecific interaction.
Occurring with in a species or genera. Involving or relating to members of one species e.g.: intraspecific competition.
Occurring among members of a single species.
Within members of the same species, as in competition for a nest site.
arising or occurring within a species