Archive image from page 570 of Culture methods for invertebrate animals;. Culture methods for invertebrate animals; culturemethodsfo00galt Year: 1959 ( Prosobranchiata 535 BREEDING HABITS In Urosalpinx cinerea as in other prosobranchs the sexes are separate, the males being distinguished by a large curved penis which lies at the right side of the head behind the eyes. The two sexes may also be separated by microscopic examination of the gonads, the male glands being whitish in appearance; those of the female yellow to orange in color. The eggs are laid in small, yellow, membranous, vaselike c
Archive image from page 570 of Culture methods for invertebrate animals;. Culture methods for invertebrate animals; culturemethodsfo00galt Year: 1959 ( Prosobranchiata 535 BREEDING HABITS In Urosalpinx cinerea as in other prosobranchs the sexes are separate, the males being distinguished by a large curved penis which lies at the right side of the head behind the eyes. The two sexes may also be separated by microscopic examination of the gonads, the male glands being whitish in appearance; those of the female yellow to orange in color. The eggs are laid in small, yellow, membranous, vaselike capsules attached to the substratum by a solid expanded foot (Fig. 85). The egg case is flattened vertically with edges marked by keel-like ridges and has, at the top, a small cap through which the fully grown larvae escape. Within the capsule is a soft jelly-like fluid in which the eggs are im- bedded and which serves not only to protect them from mechanical injury but also as a source of food. Spawning begins in the early spring, the first egg cases are found after the water temperature has reached approximately 200 C. for at least one week (Federighi, 1931a; Nel- son, 1931). Spawning continues throughout the summer, and during the fall gradually decreases in intensity. The female creeps up to the higher levels to spawn. In almost all cases if oysters are present in the tank the female will climb on them to deposit the capsules in preference to the sides of the tank. While spawning the female does
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Keywords: 1950, 1959, archive, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, drawing, galtsoff_paul_simon_1887_, historical, history, illustration, image, invertebrates_collection_and_preservation, invertebrates_cultures_and_culture_media, page, picture, print, reference, update_forthcoming, vintage
