Therefore, while Greenland and Svalbard offer suitable breeding sites, the Arctic regions have summers that are too short to allow the northern gannets to lay their eggs and raise a brood, which requires between 26 and 30 weeks.
Así, mentres Groenlandia e as illas Spitzbergen lles ofrecen lugares de reprodución xeitosos, as zonas puramente árticas teñen un verán demasiado curto para que poidan poñer os ovos e criar os polos, para o que precisan entre 26 e 30 semanas.