Journal of Endocrinology and Reproduction

K. P. Joy ¹, M. S. Singh ¹

Affiliations
1 Department of Zoology, Banaras Hindu University, Varanasi-221005, IN

Abstract

Seminal vesicles (SV) are present in all catfishes collected in this study : Clarias batrachus (Linnaeus), Wallago attu (Bloch and Schneider), Ompok siluroides (Lecepede), Rita rita ((Hamilton), Mystus tengara (Hamilton), Mystus vittatus (Bloch), Pangassius pangassius (Hamilton), Heteropneustes fossilis (Bloch) and absent in species other than catfishes. The number of SV lobes ranged from a single pair in H. fossilis to several pairs in P. pangassius with significant morphological variations. Total proteins, fructose, hexosamines and sialic acid were estimated in the testes and SV. Compared to testes, total proteins were higher in the SV of W. attu, O. siluroides and H. fossilis, fructose levels were higher in the SV of O. siluroides and C. batrachus, hexosamine contents were higher in the SV of W. attu, M. tengara and H. fossilis, and sialic acid levels in the SV of W. attu, O. siluroides, R. rita, M. vittatus and P. pangassius. Sialic acid was not detected in the testes of R. rita and H. fossilis. The SV may be an adaptive modification of the reproductive system for temporary storage of spermatozoa in a protein-sugar-rich nutrient medium.

Keywords

Catfishes, Fructose, Hexosamine, Seminal Vesicles, Sialic Acid, Teleosts, Testis.

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R. Chaube ¹, K. P. Joy ¹

Affiliations
1 Department of Zoology, Banaras Hindu University, Varanasi 221 005, IN

Abstract

In the present in vitro study, involvement of cAMP in basal and E₂-modulated brain (hypothalamus and telencephalon) TH activity was demonstrated in female catfish Heteropneustes fossilis. Incubation of enzyme preparation (soluble active fraction) with cAMP (0.05-1 .OmM) and inhibitors of cAMP-specific phosphodiesterase (IBMX, 0.5-2.0mM) and theophylline, 0.5-2.0mM) stimulated enzyme activity in a concentration-dependent manner.

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A. Mishra ¹, K. P. Joy ¹

Affiliations
1 Department of Zoology, Banaras Hindu University, Varanasi-221005, IN

Abstract

Mature folliculated oocytes were incubated with two catecholestrogens, 2-hydroxyestradiol-17b and 2-methoxy-estradiol-17b and catecholamines; dopamine, noradrenaline and adrenaline in concentration and duration studies. The hydroxyestrogen stimulated germinal vesicle break down (GVBD) in a concentration (1-20mM/ml) and duration (0-30hr) dependent manner; 5mM/ml concentration induced 80% GVBD in 24hr.

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