مکانیسم های فیزیولوژی تولید مثلی در ماهیان استخوانی

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسنده

دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

تولید مثل شامل فرایندهای تنظیم‌شده هورمونی است، مانند رشد و بلوغ اندام‌های جنسی و سلول‌های زایشی، تولید سلول‌های زایشی عملکردی (تخمک‌ها و اسپرم‌ها) که بتوانند در لقاح شرکت کنند برای بقای یک گونه رویداد مهمی هستند. بنابراین، بافت‌های تولیدمثلی بایستی در طی نمو جنینی تولید شوند، و رشد و بلوغ سلول‌های زایشی بایستی پس از بلوغ جنسی موجود عمل کند. ماهیان ممکن است راهبرد‌های تولیدمثلی زیادی را بکارگیری کنند که عبارتند از: زنده‌زایی (لقاح داخلی، جنین درون بدن مادر نمو می‌یابد و توسط مادر مواد مغذی جهت رشد جنین فراهم می‌گردد)، زنده تخم‌گذار (لقاح داخلی، مادر تخم‌های زرده دار می‌گذارد که این تخم‌ها تا زمان تخم-گشایی درون لوله تخم‌بر می‌‌مانند)، و تخم‌گذار (لقاح خارجی، جنین خارج از بدن مادر نمو می‌یابد. در مقاله حاضر انواع مکانیسم های مختلف تولید مثلی ماهیان استخوانی از جمله فعال‌سازی محور مغز-هیپوفیز-اندام جنسی در طی بلوغ، هورمون‌های آزاد‌کننده گنادوتروپین-ها، غده هیپوفیز، گنادوتروپین‌ها، استروئیدهای‌جنسی، فرایند اسپرم‌سازی، فرایند نمو تخمک، رشد اووسیت، فرایند زرده‌سازی و بلوغ اووسیت و تخمک سازی.

کلیدواژه‌ها


عنوان مقاله [English]

Reproductive Physiology Mechanisms in Bony Fish

چکیده [English]

Reproduction includes hormonal regulated processes, such as the growth and maturity of the reproductive organs and reproductive cells, the production of functional reproductive cells (eggs and sperms) that can engage in fertilization to survive an event type Are important. Therefore, reproductive tissues should be produced during embryonic development, and the growth and reproductive maturity of the reproductive cells should be performed after sexual maturity. Fish may use a lot of reproductive strategies that are: livestock (internal fertilization, maternal embryo development, and maternal nutrients for fetal growth), live birth (fertilization) Inner, the mother of yolk eggs suggests that these eggs are egg-laying eggs in the tube), and in the laying (external fertilization, the embryo develops out of the mother's body). In the present paper, various types of reproductive mechanisms of bone marrow production, including the activation of the pituitary-pituitary axis during puberty, gonadotropin releasing hormones, pituitary gland, gonadotropins, Steroidization, spermatogenesis process, oocyte development process, oocyte growth, oocyte yellowing and oocyte maturation process.

کلیدواژه‌ها [English]

  • puberity
  • Reproduction
  • osteichthys
  • ovum
  • Sperm
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