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Impact of Temperature Variations on Breeding Behavior of Cirrhinus mrigala during Induced Spawning

Impact of Temperature Variations on Breeding Behavior of Cirrhinus mrigala during Induced Spawning

Saeed Akram Khan1, Shahid Sherzada1*, Muhammad Ashraf1, Durr-e-Shehwar1, Sonia Iqbal1, Usman Atique1,3, Farzana Abbas1, Sohail Ahmad2 and Muhammad Sultan Haider4

1Department of Fisheries and Aquaculture, University of Veterinary and Animal Sciences, Lahore, Pakistan
2Department of Poultry Production, University of Veterinary and Animal Sciences, Lahore, Pakistan
3Department of Bioscience and Biotechnology, Chungnam National University, South Korea
4Department of Zoology, University of Lahore, Pakistan
 
* Corresponding author: shahid.sherzada@uvas.edu.pk

Fig. 1.

Temperature dependent developmental stages of Cirrhinus mrigala. (a) blastodisc stage observed at 26 ºC, (b) blastodisc stage observed at 29 ºC, (c) blastodisc stage observed at 32 ºC, (d) blastodisc stage observed at 34 ºC, (e) fertilized egg at 29 oC, (f) denatured fertilized egg at 34 oC, (g) morula stage at 26 oC, (h) morula stage at 29 oC, (i) late morula stage at 29 ºC, (j) late morula stage at 34 oC, (k) yolk plug stage at 29 ºC¸ (l) yolk plug stage at 32 ºC.

Fig. 2.

Process of eggshell thinning in Cirrhinus mrigala (a) premature hatchling, (b) normal hatchling, (c) normal fry reared at 29 ºC, (d) denatured fry reared at 34 ºC.

Pakistan Journal of Zoology

August

Vol. 54, Iss. 4, Pages 1501-2001

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