Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Fine structural observations on oocyte development in monogeneans

D W Halton, S D Stranock, A Hardcastle

    Parasitology
    |August 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Medial arch instability/internal foot overload association with non-insertional Achilles tendinopathy and the 'Zone of Conflict Theory'.

    Foot (Edinburgh, Scotland)·2024
    Same author

    Muscling in on parasitic flatworms.

    Parasitology today (Personal ed.)·2006
    Same author

    Neuromusculature of Macrogyrodactylus congolensis, a monogenean skin parasite of the Nile catfish Clarias gariepinus.

    Parasitology research·2006
    Same author

    Inter-phyla studies on neuropeptides: the potential for broad-spectrum anthelmintic and/or endectocide discovery.

    Parasitology·2006
    Same author

    Fine structure of the anterior adhesive apparatus (head organs) of Bravohollisia gussevi Lim, 1995 (Monogenea: Ancyrocephalidae).

    Parasitology·2005
    Same author

    A phase I pharmacokinetic and pharmacodynamic study of BGC9331 and carboplatin in relapsed gynaecological malignancies.

    British journal of cancer·2005
    Same journal

    Schistosomal circulating anodic antigen dynamics pre- and post-treatment in preschool aged children from the PIP trial in Uganda.

    Parasitology·2026
    Same journal

    Rapid diagnostic assay distinguishing the snail vectors <i>Bulinus globosus</i> and <i>Bulinus nasutus</i> for urogenital schistosomiasis transmission risk mapping in East Africa.

    Parasitology·2026
    Same journal

    Identification and coregulation pattern analysis of long noncoding RNAs in the mouse macrophages after Leishmania donovani infection.

    Parasitology·2026
    Same journal

    Persistent intestinal schistosomiasis and progressive liver fibrosis in semi-captive chimpanzees: A 12-year epidemiological follow-up in Ngamba Island Chimpanzee Sanctuary, Lake Victoria, Uganda.

    Parasitology·2026
    Same journal

    Parasites of a keystone megaherbivore: insights into trematode life cycles and biological invasions in the Greater Kruger ecosystem.

    Parasitology·2026
    Same journal

    Integrative description of <i>Udonella umgibeli</i> n. sp. (Monopisthocotylea: Udonellidae) as an epibiont of <i>Caligus tetrodontis</i> Barnard, 1948, off the coast of South Africa.

    Parasitology·2026
    See all related articles

    Oocyte differentiation in monogenean flatworms involves three stages, from undifferentiated oogonia to mature primary oocytes. This study details the ultrastructural changes during this crucial reproductive process.

    Area of Science:

    • * Zoology
    • * Parasitology
    • * Cell Biology

    Background:

    • * Oocyte differentiation is a critical process in the reproductive cycle of parasitic flatworms (monogeneans).
    • * Understanding oocyte development is key to comprehending parasite reproduction and life cycles.
    • * Previous research has not fully detailed the ultrastructural progression of oogenesis in these specific monogenean species.

    Purpose of the Study:

    • * To describe the ultrastructural changes during oocyte differentiation in three monogenean species: Diclidophora merlangi, Diplozoon paradoxum, and Calicotyle kröyeri.
    • * To propose a three-stage model of oocyte development based on morphological characteristics.
    • * To identify species-specific variations in oocyte ultrastructure and developmental patterns.

    Main Methods:

    Related Experiment Videos

    • * Transmission electron microscopy was used to examine the ultrastructure of oocytes at various developmental stages.
    • * Ovaries from adult monogeneans were dissected and processed for ultrastructural analysis.
    • * Oocytes were categorized into three stages based on morphology: oogonia/immature primary oocytes, maturing primary oocytes, and mature primary oocytes.

    Main Results:

    • * Oogenesis progresses to meiotic prophase in all studied species.
    • * A three-stage developmental sequence was observed: undifferentiated (oogonia/immature primary oocytes), maturing (increased nucleolar volume, cortical granule formation), and mature (resting phase, peripheral cortical granules).
    • * Key organelles like the GER, Golgi apparatus, mitochondria, and endoplasmic reticulum (ER) showed dynamic changes throughout oocyte maturation.

    Conclusions:

    • * Oocyte differentiation in these monogeneans follows a conserved three-stage pattern with distinct ultrastructural features.
    • * The study provides a detailed ultrastructural roadmap of oogenesis in D. merlangi, D. paradoxum, and C. kröyeri.
    • * Minor species-specific differences exist, but the overall process of oocyte maturation is similar across these monogenean species.