 หัวเรื่อง:การศึกษากระบวนการสร้างเซลล์อสุจิในกุ้งกุลาดำ ผู้เขียน: Wanida Tripanichkul, Weerachai Singhaniyom, Weeraphong Vuthiphanchai, Sumol Jueng-udomcharoen สื่อสิ่งพิมพ์:pdf AbstractSpermatogenesis in Penaeus monodon Fabricius was studied usint light microscopy. Only one stage of spermatogenic cell, besides spermatogonia, was consistently found in any seminiferous tubules. Primary spermatocyte in Prophase I was characterized by a single large inclusion body located at one pole of the cell. Secondary spermatocyte division resulted in the formation of spermatid. Spermatid would undergo an elaborate period of differentiation resulting in the formation of sperm which was different from those of other living organisms in the Animal Kingdom. |
หัวเรื่อง:ผลของฮอร์โมน Human Chorionic Gonadotropin ต่อการพัฒนาการของไข่กุ้งกุลาดำ ผู้เขียน:Verapong Vuthiphandchai, Weerachai Singhaniyom สื่อสิ่งพิมพ์:pdf AbstractFourty eight giant tiger prawn female broodstocks with state I ovarian development were randomly divided into six groups. Each group was received exogenous hormone, the human chorionic gonadotropin at 0, 1, 3, 6, 9 and 12 I.U./gm.. After thirty day of experiment, those who received the hormone at 1, 3 and 6 I.U./gm. showed no sign of ovarian development. Their ovaries still maintained at stage I, and consisted mainly of oogonia and immature oocytes when observed under light microscope. This results was similar to those of sham control. However, ovaries of those who received the hormone at 9 and 12 I.U./gm. developed into stage II and stage III and consisted mainly of early mature oocyte and mature oocyte. |