Timing of Mating, Sperm Dynamics: RESULTS(2)

No significant differences were observed in the number of females trapped after this time (—4 females/100 trap nights) until 20 August. On this day, female trapping rate and the percentage of Antechinus caught that were female again increased dramatically (p < 0.001) to —12.5 females/100 trap nights and —64% female, respectively. Male trapping rate declined at this time to —7 males/100 trap nights, with 36% of captures being male (Fig. 2). This trend, however, was short-lived, with male trapping rate reaching —11.7/100 trap nights the following day while that of females fell to 1.7/100 trap nights. A significant decline in male trapping rate and the percentage of males captured was observed from the 27th of the month until the end of the study period in early September (p < 0.05).

The last male captured was trapped on 4 September. Female trapping rate from 23 August to the end of the study period (—4-5 animals/100 trap nights) was not significantly different from that observed early in the mating season (Fig. 2). birth control yasmin

Timing of Mating and Total Sperm Number in the Female Reproductive Tract

Thirty-nine females were caught prior to ovulation; however, 28 of these (77.8%) had not mated at the time of capture.

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