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Comparative study on the effects of human chorionic gonadotropin in induced spawning of catfish (Clarias macrocephalus) / Pio D. Bersamin and Adelaida L. Palma

By: Contributor(s): Material type: ArticleArticlePublisher: Quezon City, Philippines : Bureau of Fisheries and Aquatic Resources , 1977Content type:
  • text
Media type:
  • computer
Carrier type:
  • online resource
ISSN:
  • 2672-2836 (Online)
Subject(s): In: Philippines. The Philippine Journal of Fisheries Volume 15, Issue no. 1 ( 1977), page 80 - 94Abstract: Ovulation in mammals is controlled by two hormones secreted by the Pituitary Gland, the Follicle Stimulating Hormone (FSH), and the Luteinizing Hormone (LH). FSH, which is secreted by the anterior lobe of the pituitary is responsible for the increase in the production of estrogenic hormone (estrone)* which stimulates Graafian follicles (ovarian follicles) to mature and ovulate. LH, on the other hand, organizes the corpus luteum** upon ovulation and causes the secretion of progesterone which stimulates the secretion of viscid glycogenic fluid for the nutrition of the embryo prior to the development of the vascular system. The mechanisms of these hormonal interaction and their effects on the estrous cycle in mammals operate in the principle of reciprocal action. A parallel situation exists in lower vertebrates. In fishes, gonadal activities such as the transition from juveniles to sexual maturity and the seasonal spawning cycle are pre-determined by Gonadotropin secreted by the Meso-adenohypophysis lobe of the pituitary.
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Holdings
Item type Current library Collection Call number Vol info Status Date due Barcode
Journal Article Journal Article NFRDI Central Office NFRDI KMRC Indexed Materials Collection Electronic Volume 15, Issue no. 1 ( 1977), page 80 - 94 Available IMC000129
Journal Journal NFRDI Central Office NFRDI KMRC Institutional Repository Collection Electronic SH 1 .B9524 1977 vol. 15 no. 1 (Browse shelf(Opens below)) Volume 15, No. 1 (1977) Available IRC00021

Includes bibliographical references

Ovulation in mammals is controlled by two hormones secreted by the Pituitary Gland, the Follicle Stimulating Hormone (FSH), and the Luteinizing Hormone (LH). FSH, which is secreted by the anterior lobe of the pituitary is responsible for the increase in the production of estrogenic hormone (estrone)* which stimulates Graafian follicles (ovarian follicles) to mature and ovulate. LH, on the other hand, organizes the corpus luteum** upon ovulation and causes the secretion of progesterone which stimulates the secretion of viscid glycogenic fluid for the nutrition of the embryo prior to the development of the vascular system. The mechanisms of these hormonal interaction and their effects on the estrous cycle in mammals operate in the principle of reciprocal action.

A parallel situation exists in lower vertebrates. In fishes, gonadal activities such as the transition from juveniles to sexual maturity and the seasonal spawning cycle are pre-determined by Gonadotropin secreted by the Meso-adenohypophysis lobe of the pituitary.

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