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Evaluation of pigeon egg yolk for post thaw quality, enzyme leakage and fertility of buffalo (Bubalus bubalis) bull spermatozoa

Akhter, S; Rakha, B A; Ansari, M S; Iqbal, S; Khalid, M


S Akhter

B A Rakha

M S Ansari

S Iqbal

M Khalid


Egg yolk is used as a cryoprotectant in semen preservation. However, its composition varies according to the species which may influence its effectiveness during the freeze-thaw process. Therefore, study was conducted to identify the optimum level of pigeon egg yolk (PEY) in Tris citric acid (TCA) extender for freezability and in vivo fertility of buffalo semen. Semen was collected at weekly intervals for a period of three weeks (replicates) from 6 Nili Ravi buffalo bulls (2 ejaculates/bull/ replicate) and diluted with TCA extender (50 × 106 motile spermatozoa ml-1) containing 5%, 10%, 15% and 20% PEY or 20% CEY (control) and cryopreserved. Post-thaw sperm quality and extracellular enzymes leakage was assessed after thawing. Sperm motility, plasma membrane integrity, livability and viability was significantly higher in extenders containing 10% and 15 % PEY compared to 5% PEY, 20% PEY or 20 % CEY (controls). A dose-dependent decrease was recorded in the chromatin damage for the PEY, being lowest for the 15% and 20% PEY which was significantly less compared to controls (20%CEY). The extracellular GOT and LDH leakage was significantly lower (P < 0.05) in extender containing 10% and 15 % PEY compared to the controls. Semen collected from 2 bulls and cryopreserved in extenders containing 15% PEY or 20% chicken egg yolk was assessed after AI. A total of 400 buffaloes were inseminated (100 inseminations/extender/bull). The overall fertility rate was significantly higher (P < 0.05) with semen cryopreserved in extender containing 15% PEY (56 %) compared to 20% CEY (42 %; controls). In conclusion, pigeon egg yolk at 15 % offers advantages over 20% chicken egg yolk in terms of in vitro post-thaw semen quality and in vivo fertility of buffalo.


Akhter, S., Rakha, B. A., Ansari, M. S., Iqbal, S., & Khalid, M. (2018). Evaluation of pigeon egg yolk for post thaw quality, enzyme leakage and fertility of buffalo (Bubalus bubalis) bull spermatozoa. Theriogenology,

Journal Article Type Article
Acceptance Date Jun 21, 2018
Publication Date Jun 23, 2018
Deposit Date Jun 30, 2018
Publicly Available Date Jul 1, 2019
Print ISSN 0093-691X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Public URL


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