The catfish, H. fossilis, survives for long periods after hypophysectomy, although with impaired osmoregulatory mechanisms. Plasma osmolarity and cortisol levels decline significantly within 2 hr after hypophysectomy and attain the lowest values by about 27 hr. Hypophysectomy also results in a marke
Some Haematological Effects of Crude Oil on Freshwater Catfish,Heteropneustes fossilis (BLOCH)
β Scribed by Prasad, M. S. ;Prasad, P. ;Singh, D.
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 385 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0323-4320
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Experiments were conducted to evaluate the effects of mammalian hypophysial hormones, placental gonadotrophins, gonadal hormones, and adrenal corticosteroids on ovulation and spawning in three-day hypophysectomized gravid catfish. Of the hypophysial hormones tested (FSH, LH, LtH, STH, TSH, ACTH, and
## Abstract Actinomycin D and mitomycin C, inhibitors of DNAβdependent RNA synthesis, were ineffective in blocking desoxycorticosterone (DOC)βinduced in vitro maturation in oocytes of the catfish, __Heteropneustes fossilis__ (Bloch). This suggests that a concurrent mRNA synthesis is not obligatory