Anoxia tolerance in the adult Carabid beetle Pelophilia borealis was tested in laboratory conditions and it was found that they could survive a continuous period of up to 127 days in an atmosphere of 99.9% nitrogen at 0 °C. Many beetle species undertake annual mass movements which are termed as migrations.
A tolerancia á anoxia no carábido adulto Pelophilia borealis foi comprobada en condicións de laboratorio e atopouse que podía sobrevivir a un período continuado de 127 días nunha atmosfera de 99,9% de nitróxeno a 0 °C. Moitas especies de coleópteros realizan movementos en masa anuais, que se denominan migracións.