Timing of Mating, Sperm Dynamics: RESULTS(1)


Fifty-four female and 86 male agile Antechinus were caught between 3 August and 5 September 1996 from 18 nights of trapping and a total of 1206 trap nights. A comparison of trapping data between males and females across the study period indicated a positive relationship in trapping success between the sexes (p < 0.01). Early in August, males were trapped at a rate of —6/100 trap nights while females were trapped at a rate of —4/100 trap nights. Approximately 66% of all Antechinus captured at this time were male and —34% were female (Fig. 2). Male trapping success declined significantly (p < 0.005) on 7 August before increasing significantly (p < 0.005) on the 13th and 14th of the month. buy cheap antibiotics

Male trapping success peaked at —21 males/100 trap nights on 14 August. The percentage of males trapped also increased at this time to —80% of all Antechinus caught (Fig. 2). Like that for the males, the number of females caught per 100 trap nights increased significantly (p < 0.001) on 13 August, although the percentage of Antechinus captured that were females remained relatively constant (—38%).
Fig1Timing of Mating
FIG. 1. Female reproductive tract of the agile Antechinus showing regions isolated for assessment of sperm number and distribution. X2.5.

Fig2Timing of Mating
FIG. 2. Captures (100/trap nights) of male (solid bars) and female (open bars) agile An-techinus at Powelltown, Victoria, between 1 August and 6 September, encompassing the rut (* = p s 0.05; ** = p s 0.005; *** = p s 0.001). Refer to Materials and Methods: Statistical Analysis.


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