Effects of blinding and/or total darkness on ovarian recrudescence or regression during the appropriate periods of the reproductive cycle of the catfish,Heteropneustes fossilis(Bloch)∗∗

1970 ◽  
Vol 1 (2) ◽  
pp. 147-159 ◽  
Author(s):  
A. Sehgal ◽  
B. I. Sundararaj
Keyword(s):  
Reproductive Cycle ◽  
Total Darkness ◽  
Heteropneustes Fossilis

scholarly journals Effect of varied calcium concentrations on serum calcium, sodium, potassium and protein value during the different phases of reproductive cycle in Heteropneustes fossilis (Bloch)

2009 ◽  
Vol 1 (2) ◽  
pp. 231-234
Author(s):  
K. Singh ◽  
O.P. Gupta
Keyword(s):  
Serum Calcium ◽  
Reproductive Cycle ◽  
Energy Demand ◽  
Sodium Level ◽  
Serum Sodium Level ◽  
Heteropneustes Fossilis ◽  
Sodium Potassium ◽  
Spawning Period ◽  
Extra Energy ◽  
Post Spawning

The serum, calcium, sodium, potassium and protein value were measured during different phases of reproductive cycle in Heteropneustes fossilis (Bloch) due to effect of varied calcium concentrations. The calcium value was higher then and Potassium value Protein during spawning period pointing a more demand of calcium which is necessary for the functioning of a enzyme thereby also helps in hardening of eggs while protein meets an extra energy demand during this period. An increase in serum, sodium level was also observed during spawning period than pre and post-spawning.

Thyroid hormone profile during annual reproductive cycle of diploid and triploid catfish, Heteropneustes fossilis (Bloch)

2006 ◽  
Vol 147 (2) ◽  
pp. 126-132 ◽  
Author(s):  
Angshuman Biswas ◽  
Samita Kundu ◽  
Sumedha Roy ◽  
Jhuma De ◽  
Mitali Pramanik ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Reproductive Cycle ◽  
Heteropneustes Fossilis ◽  
Annual Reproductive Cycle ◽  
Hormone Profile

scholarly journals Changes in nitric oxide (NO) synthase isoforms and NO in the ovary of Heteropneustes fossilis (Bloch.) during the reproductive cycle

2008 ◽  
Vol 199 (2) ◽  
pp. 307-316 ◽  
Author(s):  
V Tripathi ◽  
A Krishna
Keyword(s):  
Nitric Oxide ◽  
Oocyte Maturation ◽  
Reproductive Cycle ◽  
Close Association ◽  
Follicular Development ◽  
No Synthase ◽  
Heteropneustes Fossilis ◽  
Germinal Vesicle Breakdown ◽  
Nos Isoforms

The purpose of the study was to demonstrate the presence of nitric oxide (NO) synthase (NOS) isoforms (neuronal NOS (nNOS), inducible NOS (iNOS), and endothelial NOS (eNOS)) and the role of NO in the ovary of Heteropneustes fossilis. In one half of the ovary collected during different reproductive stages, NOS isoforms were localized immunohistochemically in paraffin sections whereas the other half was processed for NOS and NO quantification using western blot followed by densitometry and nitrate/nitrite assay respectively. The role of NO on oocyte maturation was studied by examining the effect of NO donor (sodium nitroprusside; SNP) and NOS inhibitor (Nω-nitro-l-arginine methyl ester) on 17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-P)-induced germinal vesicle breakdown (GVBD) in the cultured oocyte collected during prespawning phase. NOS immunostaining was predominantly localized in previtellogenic follicles, with nNOS detected in the nucleus and cytoplasm of oocytes whereas iNOS and eNOS localized in granulosa, theca cells, and cytoplasm of oocytes. The NOS expression was higher in previtellogenic phase when compared with vitellogenic phase. The nitrate/nitrite concentrations in ovary showed gradual increase from recrudescence (4.9±0.19 nM/mg protein) to late previtellogenic phase (7.02±0.53 nM/mg protein), but showed a sharp decline during the vitellogenic phase (0.41±0.053 nM/mg protein). Serum and ovarian nitrate/nitrite level showed a close association during the reproductive cycle. The results showed an increase in NOS activity and nitrate/nitrite concentrations as the follicle grow suggesting involvement of NO in follicular development. SNP significantly inhibited 17α,20β-P-induced GVBD in fish oocytes. Thus, it is concluded that the fish ovary possesses NOS/NO system and a possibility that NO has a role in follicular development and regulation of oocyte maturation in fish, H. fossilis.

scholarly journals Effect of variation of salinity on protein, RNA and DNA contents of liver, muscle and ovary of female singi fish, heteropneustes fossilis (Bloch), at two phases of reproductive cycle

1984 ◽  
Vol 8 (8) ◽  
pp. 77 ◽  
Author(s):  
A. K. Dasmahapatra ◽  
A. K. Medda
Keyword(s):  
Reproductive Cycle ◽  
Heteropneustes Fossilis ◽  
Dna Contents ◽  
Two Phases ◽  
Rna And Dna

Investigou-se as mudanças causadas nos teores de proteínasje ácidos nucleicos do fígado, músculo, ovários e peso dos orgãos (HSI, GSI) pela variação de salinidade do meio (65, 135 e 225_mOsm, NaCl/litro2 e salinidade zero ou água destilada) em fêmeas nao vitelogenicas (NV) e vitelogênicas (V) do peixe Heteropneustes fossilis (Bloch) às temperaturas de 25ºC e 30ºC, 30 dias após o período de aclimação nos respectivos meios. Obteve-se valores máximos de HSI tanto nos peixes (NV) e (V) quando mantidos em água destilada e valores mínimos quando em solução de 225 mOsm. 0 aumento de temperatura de 25ºC para 30°C causou uma redução nos valores de HSI somente nos peixes (V). Salinidade de 135 e 65-135 mOsm produziu o valor mais alto de GSI nos dois grupos de peixes: (NV) e (V). 0 efeito estimulante da alta temperatura (30°C) no GSI foi encontrado somente nos peixes (NV) em todos os meios salinos. 0 teor hepático de proteínas e RNA foi máximo nos peixes (NV) e (V) mantidos em meios de 65 mOsm de NaCl e mínimo nos de 225 mOsm de salinidade. 0 aumento de temperatura de 25ºC para 30ºC não alterou o teor protéico hepático mas aumentou e diminuiu o teor de RNA nas fases (V) e (NV). 0 teor muscular de proteínas e RNA foram máximos a salinidadgs zero e 65 mOsm e mínimos a 225 mOsm tanto a 25ºC , como 30ºC. A alta temperatura (30°C) aumentou o teor protéico, mas não alterou o teor de RNA. Salinidade de 135 mOsm causou o maior aumento nos teores dg proteínas, RNA e DNA do ovário das fêmeas (NV) a 25°C ou 30ºC. Salinidade zero reduziu bastante o teor desta substância no ovário. No caso do GSI o efeito estimulador da alta temperatura (30°C) no acúmulo de proteínas, RNA e DNA se fez sentir em todas as concentrações salinas do meio. Os peixes (V) apresentaram teor máximo de proteínas ovarianas a salinidade de 135 mOsm e mínimos em água destilada. Os ovários (V) tiveram a taxa mais alta de DNA em 65 e 135 mOsm de salinidade do que a zero ou 225 mOsm. A influência das altas temperaturas não foi sentida nas fêmeas (V). 0 teor de RNA ovariano dos peixes (V) também não se alterou em todas as condições experimentais. 

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