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Sex-specific metabolic changes in the annual reproductive cycle of a freshwater catfish


, : Sex-specific metabolic changes in the annual reproductive cycle of a freshwater catfish. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology 137(1): 101-106

Sex-specific enzymatic and other biochemical changes were studied in the annual reproductive cycle of the freshwater catfish, Clarias batrachus. Citrate synthase (CS) activity of brain, liver and skeletal muscle was maximum in spawning and minimum in postspawning showing a sharp decline in aerobic capacity after spawning. Similar CS activity in remaining phases of the annual reproductive cycle reflects similar energy need during regressed, preparatory and prespawning phases. Glucose 6-phosphate dehydrogenase (G6-PDH) activity declined in spawning and postspawning indicating a possible decrease in lipid and nucleic acid syntheses. The subsequent increase in G6-PDH activity with onset of resting and maintenance of the increased level throughout preparatory and prespawning phases shows restoration of biosynthetic activity. Higher activity of G6-PDH in female than male may be to satisfy a greater biosynthetic need of female reproduction and breeding. The decreased RNA content of tissues showed reduction in protein synthesis capacity during spawning and subsequent increase through postspawning until resting phase. The RNA content of brain and liver was higher in female than male during preparatory and prespawning, which may be associated with higher protein synthesis requirement of female for preparation of reproductive activities. The requirement based sex related changes in metabolism of catfish may be enzyme, tissue or reproductive phase-specific.

US$29.90

PMID: 14698916


Other references

Conway, Tf, 1971: A wide line NMR R-F saturation method to measure fat in moist samples of defatted corn germ. Journal of the American Oil Chemists' Society 48(2): 54-58

Dubois Alain; Bour, R., 2012: Hyper-validation of five nomina of amphibians and reptiles threatened by senior synonyms or homonyms. Five nomina of amphibians and reptiles introduced by Laurenti (1768) and traditionally used in European herpetology (Hyla, Natrix, Lacerta viridis, Podarcis muralis, Triturus cristatus) are threatened by senior synonyms or homonyms published earli...

Feigelson, H.Spencer.; Zeng, C.; Pawloski, P.A.; Onitilo, A.A.; Richards, C.Sue.; Johnson, M.A.; Kauffman, T.L.; Webster, J.; Nyirenda, C.; Alexander, G.L.; Hwang, C.; Cross, D.; McCarty, C.A.; Davis, R.L.; Schwarzkopf, D.; Williams, A.E.; Honda, S.; Daida, Y.; Kushi, L.H.; Delate, T.; Goddard, K.A.B., 2014: Does KRAS testing in metastatic colorectal cancer impact overall survival? A comparative effectiveness study in a population-based sample. Epidermal growth factor receptor (EGFR) inhibitors are approved for treating metastatic colorectal cancer (CRC); KRAS mutation testing is recommended prior to treatment. We conducted a non-inferiority analysis to examine whether KRAS testing has i...

Soga, N.; Connolly, J.O.; Chellaiah, M.; Kawamura, J.; Hruska, K.A., 2002: Rac regulates vascular endothelial growth factor stimulated motility. During angiogenesis endothelial cells migrate towards a chemotactic stimulus. Understanding the mechanism of endothelial cell migration is critical to the therapeutic manipulation of angiogenesis and ultimately cancer prevention. Vascular endothel...

Streatfield, P.Kim.; Khan, W.A.; Bhuiya, A.; Alam, N.; Sié, A.; Soura, A.B.; Bonfoh, B.; Ngoran, E.K.; Weldearegawi, B.; Jasseh, M.; Oduro, A.; Gyapong, M.; Kant, S.; Juvekar, S.; Wilopo, S.; Williams, T.N.; Odhiambo, F.O.; Beguy, D.; Ezeh, A.; Kyobutungi, C.; Crampin, A.; Delaunay, Vérie.; Tollman, S.M.; Herbst, K.; Chuc, N.T.K.; Sankoh, O.A.; Tanner, M.; Byass, P., 2015: Cause-specific mortality in Africa and Asia: evidence from INDEPTH health and demographic surveillance system sites. Because most deaths in Africa and Asia are not well documented, estimates of mortality are often made using scanty data. The INDEPTH Network works to alleviate this problem by collating detailed individual data from defined Health and Demographic...

Gardner, L., 1996: Hiring an outside consultant--when and how to do it. Interview by Neil Baum. Cost & Quality Quarterly Journal 3(1): 31-34

Mullendore, J.M., 1955: Pre-operative consultations in organic voice disorders. Virginia Medical Monthly 82(3): 141-143

Wang, W.; Xu, W.; Zheng, Y-jun.; Zhou, B-sen., 2007: Study on a back propogation neural network-based predictive model for prevalence of birth defect. To evaluate the value of a back propogation (BP) network on prediction of birth defect and to give clues on its prevention. Data of birth defect in Shenyang from 1995 to 2005 were used as a training set to predict the prevalence rate of birth defe...

Bardin, C.; Zelkowitz, P.; Papageorgiou, A., 1993: Outcome of appropriate for gestational age and small for gestational age infants with birth weight less than 1,000 g. Biology of the Neonate 64(2-3): 170

Murray M.; Murray P.K.; Jennings F.W.; Urquhart G.M., 1973: The pathology of trypanosoma brucei infection in the rat. Papaevangelou, George J Ninth International Congress on Tropical Medicine And Malaria, Vol 1 Abstracts Of Invited Papers Athens, Greece, October 14-21, 329p Congress Publications Committee: Athens, Greece 58