Title page for etd-0725111-134844


[Back to Results | New Search]

URN etd-0725111-134844
Author Yi-jou Chung
Author's Email Address ava1245@hotmail.com
Statistics This thesis had been viewed 5574 times. Download 2 times.
Department Marine Biology
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The role of activin system during gonad growth in black porgy (Acanthopagrus schlegeli): the interplay in bisexual gonad mediate by activin system through brain-pituitary-gonad axis
Date of Defense 2011-07-15
Page Count 86
Keyword
  • gonadotropins
  • inhibin
  • sex differentiation
  • black porgy
  • activin
  • Abstract Inhibin and activin are disulphide-linked dimeric proteins that belong to the transforming growth factor superfamily. Inhibin and activin are identified that they have ability to modulate the secretion of follicle-stimulating hormone, FSH, from pituitary. Activin can stimulate FSH secretion, on the other hand, inhibin can inhibit
    FSH production. According to many researches, inhibin and activin play an important
    roles in regulation of reproduction. Black porgy (Acanthopagrus schlegeli) is belong
    to protandry.that has a complex regulation in sex differentiation and development. The
    male differentiation in black porgy started at fourth month, and the testis become
    mature when the spawing season coming.in the first two year in black porgy, they are
    differentiate to functional males, and some of them will change to females in the third
    year. The objectives were to study the possible roles of inhibin、activin subunits and
    their receptors in sex differentiation and sex change in black porgy. The gene
    expression of activin system increase during the period of ovarian development. The
    expression of activin receptors in ovarian tissue are higher than in testis tissue in the
    testis-excision experiment. The expression of inhbab 、acvr1and acvr2b after
    testis-excision are higher than in control in black porgy forebrain. The expression of
    inhbaa increase at four to five months after hatching in 0+-yr old black porgy, and the
    expression of inhbb and receptors decrease at the same time. According to these
    results, activin system may involve in the ovarian development and mature, and play
    important roles in testis differentiation and development in black porgy. Furthermore,
    activin system have sex dimorphisms in forebrain in black porgy.
    Advisory Committee
  • Dr. Wen-Shiun Yueh - chair
  • Dr. Yan-Horn Lee - co-chair
  • Dr. Ching-Fong Chang - advisor
  • Dr. Tse-Min Lee - advisor
  • Files
  • etd-0725111-134844.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2011-07-25

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys