| 000 | 02221nab a22003134ib4500 | ||
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| 003 | PH-QcNFR | ||
| 005 | 20240223105746.0 | ||
| 008 | 240220c||||||||ph fr j o||||f0 a|eng|d | ||
| 022 | 1 | _a2672-2836 (Online) | |
| 040 |
_aPH-QcNFR _beng _cPH-QcNFR |
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| 100 | 1 |
_aBersamin, Pio D. _93593 |
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| 245 | 1 | 0 |
_aComparative study on the effects of human chorionic gonadotropin in induced spawning of catfish (Clarias macrocephalus) / _cPio D. Bersamin and Adelaida L. Palma |
| 264 | 1 |
_aQuezon City, Philippines : _bBureau of Fisheries and Aquatic Resources , _c1977 |
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| 336 |
_atxt _btxt |
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| 337 |
_ac _bc |
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| 338 |
_acr _bcr |
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| 347 |
_atext file _bPDF |
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| 504 | _aIncludes bibliographical references | ||
| 520 | 3 | _aOvulation 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. | |
| 546 |
_aeng _beng |
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| 650 | 0 |
_2LCSH _aBreeding _93754 |
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| 650 | 0 |
_2LCSH _aCatfish _93949 |
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| 650 | 0 |
_2LCSH _aSpawning _93017 |
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| 650 | 0 |
_2LCSH _aFishes _xSpawning _93505 |
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| 650 | 0 |
_2LCSH _aFishes _xBreeding _92045 |
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| 700 | 1 |
_aPalma, Adelaida L. _eauthor _92095 |
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| 773 | 0 |
_078 _9147 _aPhilippines. _oIRC00021 _tThe Philippine Journal of Fisheries _x2672-2836 (Online) _gVolume 15, Issue no. 1 ( 1977), page 80 - 94 |
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| 942 |
_2lcc _n0 _cJA _iIMC000129 |
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_c957 _d957 |
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