Fate of unspawned oocytes in the ovary of Labeorohita (Ham.) during inter spwning periodthrough multiple breeding


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Authors

  • S C Rath Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • B Mondal Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • S K Sarkar Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • S D Gupta Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India

Abstract

Labeo rohita was induced bred repeatedly three times during May to August.GSI (ovary) was 18.2 + 0.547 in non-bred fish which was reduced to 6.983 +1.004 soon after spawning and further reduced to 4.226 + 0.603 during 1stweek. GSI again slowly increased up to 17.178 + 0.497 at the end of 6 week ofinitial spawning. Histology of spent ovary exhibited 70-80% empty follicle and20-30% of unspawned oocytes of different stages viz. previtellogenic oocytes(PO), vitellogenic oocytes (VO), non-spawned loose mature oocytes (NLMO)and non-spawned overmatured, oocytes (NOMO). The empty follicles starteddisintegrating within 1st week of the spawning. Some of the maturing oocytesgradually become overmatured whereas NLMO and NOMO were entered tothe atretic process and were absorbed to the system. Most of the non-spawnedprevitellogenic eggs and early vitellogenic eggs were used to develop in theovary as growing oocytes and entered the matuation phase towards 6th and 7th week.

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Author Biographies

  • S C Rath, Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
    Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • B Mondal, Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
    Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • S K Sarkar, Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
    Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
  • S D Gupta, Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India
    Central Institute of Freshwater Aquaculture, Kauslyaganga, Bhubaneswar, India

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Issue

Vol. 53 No. 1 (2006)

Section

Note

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How to Cite

Rath, S. C., Mondal, B., Sarkar, S. K., & Gupta, S. D. (2011). Fate of unspawned oocytes in the ovary of Labeorohita (Ham.) during inter spwning periodthrough multiple breeding. Indian Journal of Fisheries, 53(1), 103-108. https://epubs.icar.org.in/index.php/IJF/article/view/6922