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dc.contributor.authorM. Sa-ardriten_US
dc.contributor.authorN. Thongtipen_US
dc.contributor.authorK. Kornkaewraten_US
dc.contributor.authorT. Faisaikarmen_US
dc.contributor.authorY. Kitiyananten_US
dc.contributor.authorS. Mahasawangkulen_US
dc.contributor.authorA. Pinyopumminen_US
dc.contributor.authorK. Saikhunen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherKasetsart Universityen_US
dc.contributor.otherThe Institute of Science and Technology for Research and Development, Mahidol Universityen_US
dc.contributor.otherThailand Forest Industry Organizationen_US
dc.identifier.citationJournal of the South African Veterinary Association. Vol.80, No.3 (2009), 146-150en_US
dc.description.abstractKnowledge about the acrosomal status of Asian elephant (Elephas maximus) sperm is extremely limited. The objective of this study was to evaluate the viability and acrosomal status of Asian elephant sperm following induction by calcium ionophore and heparin using propidium iodide (PI) and fluorescein isothiocyanate conjugated peanut agglutinin (FITC-PNA). Semen samples were collected from elephant bulls by manual stimulation. Semen was diluted with extender, cooled to 4°C and transported to a laboratory for the experiment. Sperm cells were incubated in modified Tyrode's medium containing either 1 mM calcium ionophore or 10 mg/ml heparin for 5 h at 39°C. Sperm recovered at the onset (0 h), 1, 2, 3, 4 and 5 h of incubation were simultaneously assessed for the viability and acrosomal status using dual staining of FITC-PNA and PI. Results were confirmed by transmission electron microscopy. A progressive increase in the proportion of live-acrosome reacted sperm was observed within 3 h of incubation in both treatment groups which slightly decreased at 4 to 5 h of incubation. At 1 to 3 h of incubation, the percentage of live-acrosome reacted sperm induced by calcium ionophore was higher (P < 0.05) than those induced by heparin and the control. However, there were no statistical differences at 4 to 5 h of incubation. A progressive reduction of the percentage of motile sperm was observed in the control as well as both treatment groups. Sperm motility decreased sharply when they were incubated in calcium ionophore compared with incubation in heparin and control groups. These results indicate that the occurrence of live-acrosome reacted sperm in the Asian elephant was induced by calcium ionophore at a rate higher than that induced by heparin.en_US
dc.rightsMahidol Universityen_US
dc.titleAssessment of viability and acrosomal status of Asian elephant (Elephas maximus) sperm after treatment with calcium ionophore and heparinen_US
Appears in Collections:Scopus 2006-2010

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