Egg‐case diversity among dogfish, Scyliorhinus canicula (L.): a study of egg laying rate and nidamental gland secretory activity

Publisher Website
Google Scholar
Abstract
Egg‐case size, shape and pigmentation are distinctive features of each female lesser‐spotted dogfish, Scyliorhinus canicula. During 9 months captivity under constant conditions (water, temperature, photoperiod, food), a laying sequence reminiscent of an annual cycle was observed in three females. While oocyte size and (with exceptions) egg‐case weight remained constant, there was a marked decrease of the‘albumen’jelly secreted by the anterior halves of nidamental glands.