Articles by Keyword: Spermatogenesis

Search results for Spermatogenesis

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  1. Differentiated gonochorism in Nile perch <em>Lates niloticus</em> from Lake Victoria, Uganda

    Differentiated gonochorism in Nile perch <em>Lates niloticus</em> from Lake Victoria, Uganda

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Gonadal development and structure were examined in 317 Nile perch, Lates niloticus, of 4 to 157 cm SL taken from Lake Victoria, Uganda, in 2005–2006. Macroscopic and histological investigation showed a differentiated gonochoristic pattern, with no juvenile intersexuality. Oogonial cells...
  2. Reproduction in the viviparous South African clinid fish <em>Fucomimus mus</em>

    Reproduction in the viviparous South African clinid fish <em>Fucomimus mus</em>

    Item type: Journal Article • Journal: African Journal of Marine Science
    Description of the reproductive anatomy, histology and seasonality of reproduction of the viviparous clinid fish, Fucomimus mus, was based on a collection of 227 specimens from various intertidal localities off the south-east coast of South Africa. Males produce sperm throughout...
  3. Maturity, spermatogenesis and seasonal reproductive cycle of male <em>Rhinobatos annulatus</em> (Muller &amp; Henle, 1841) from Algoa Bay, South Africa, and a novel description for sperm release from the spermatocyst

    Maturity, spermatogenesis and seasonal reproductive cycle of male <em>Rhinobatos annulatus</em> (Muller &amp; Henle, 1841) from Algoa Bay, South Africa, and a novel description for sperm release from the spermatocyst

    Item type: Journal Article • Journal: African Zoology
    Despite the unique gonadal organization and reproductive strategies known for elasmobranchs very little is known about the reproductive biology of local species. The stages of spermatogenesis for the lesser guitar fish, Rhinobatus annulatus, has not been described and specifically the...
  4. Structure and cytology of the testes of <em>Labeo victorianus</em> (Pisces: Cyprinidae)

    Structure and cytology of the testes of <em>Labeo victorianus</em> (Pisces: Cyprinidae)

    Item type: Journal Article • Journal: African Zoology
    Testes macromorphology and histomorphology together with sperm cytology are described for a potamodrometic cyprinid fish, Labeo victorianus, from Lake Victoria. Testes were found to be paired and elongate, suspended by a mesorchium on either side of the swim bladder. A...
  5. Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish <em>Carybdea branchi</em> (Cubozoa, Carybdeidae)

    Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish <em>Carybdea branchi</em> (Cubozoa, Carybdeidae)

    Item type: Journal Article • Journal: African Journal of Marine Science
    Information on the reproductive development of species of box jellyfish (class Cubozoa) is poor globally, despite their significance as potent stingers and worrying projections about range expansions. While most species are confined to tropical and subtropical waters, the South African...