The ultrastructure of the polar lobe of Crepidula fornicata (Gastropoda, Prosobranchia).

نویسندگان

  • M R Dohmen
  • D Lok
چکیده

Some novel structural features of the polar lobe of the egg of Crepidula are described. The significance of two kinds of aggregate is discussed in relation to the morphogenetic factors present in polar lobes generally. Surface configurations of the polar lobe are also described.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Interaction between Association and Exposure Is Correlated with Mean Size of Basal Crepidula Fornicata in Nahant, Ma

Abstract The Atlantic slipper snail, Crepidula fornicata, is a filter-feeding gastropod. C. fornicata is a sequential hermaphrodite with a unique reproductive behavior that involves smaller, mobile male slipper snails stacking on top of larger female slipper snails. This association allows males to release sperm in close proximity to fertile females. This study examined the mean size of basal C...

متن کامل

The seminal receptacle and implications for reproductive processes in the invasive gastropod Crepidula fornicata.

The calyptraeid gastropod Crepidula fornicata is the object of considerable research attention, due to its invasive status in the North-Eastern Atlantic, its introduction to habitats throughout the Northern hemisphere, and its scientific interest as a model organism for the study of developmental and reproductive processes in the Metazoa. Since the knowledge concerning the structural foundation...

متن کامل

Seasonal Variations in Maternal Provisioning of Crepidula fornicata (Gastropoda): Fatty Acid Composition of Females, Embryos and Larvae

Recruitment success of marine invertebrate populations not only depends on the number of recruits but also on their quality which affects their survival. In species characterized by a mixed development (encapsulated embryonic development and release of planktotrophic larvae), the offspring quality depends on both maternal provisioning and larval feeding. Here, we investigated potential changes ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Journal of embryology and experimental morphology

دوره 34 2  شماره 

صفحات  -

تاریخ انتشار 1975