The presence and localization of α‐ and β‐spectrins and of the spectrin cross‐linking protein actin were investigated, in previtellogenic oocytes of three species of Antarctic teleosts: the two red‐blooded nototheniids, Trematomus bernacchii and Trematomus newnesi , and the channichthyid, the ice fish Chionodraco hamatus . Analyses by western blotting indicated that these species had an unusual abundance of spectrin isoforms a...

Cytochemical analyses was used to study the organization and content of cortical alveoli in eight species of Antarctic teleosts belonging to three different families of notothenioids: nototheniids, bathydraconids and channichthyids. Results indicated differences existed among the various species in alveolar size and distribution and in their content. In nototheniids, in particular, typical nucleoids were formed that could be l...