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題名 | 斜紋夜蛾(Spodoptera litura)(鱗翅目:夜蛾科)雄蛾的交尾次數與精胞主體容積=Influence of Mating Frequency on the Volume of the Corpus of Spermatophore of Male Tobacco Cutworm (Spodoptera litura (F.))(Lepidoptera: Noctuidae) |
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作者姓名(中文) | 歐陽盛芝; 朱耀沂; | 書刊名 | 臺灣昆蟲 |
卷期 | 21:1 2001.03[民90.03] |
頁次 | 頁1-16 |
分類號 | 387.793 |
關鍵詞 | 斜紋夜蛾; 交尾次數; 精胞; Spodoptera litura; Mating frequency; Spermatophore; |
語文 | 中文(Chinese) |
中文摘要 | 在25°C,75+-5%RH,13L:11D條件下,以人工飼料飼育斜紋夜蛾(Spodoptera litura (F.))幼蟲。雄蛾壽命短於或等於9天且交尾次數較少的為短壽組;壽命等於或長於10天且交尾次數較多者為長壽組。前者的平均壽命為5.30+-2.06天,後者為13.65+-2.43天。在長、短壽組內,並無交尾次數隨雄蛾壽命等比例增加的情形。多次交尾的雄蛾,剛開始交尾時之精胞較大,隨交尾次數之增加而精胞逐漸縮小。長壽組的雄蛾日齡(×,日)與平均精胞主體容積(Y,mm3)之間,有Y=4.98-0.19×(r2=0.86**)的直線迴歸關係,即平均精胞主體容積隨雄蛾日齡增長而陂低。短壽組與長壽組雄蛾的累積平均精胞主體容積隨雄蛾日齡增長而增加,均得到極顯著正相關關係的迴歸直線。雄蛾首次交尾時的平均精胞主體容積大於非首次交尾者,且短壽組雄蛾的平均精胞主體容積大於長壽組雄蛾;其中短壽組雄蛾在首次交尾時之精胞主體容積有隨交尾前期之增加而增大的趨勢;長壽組雄蛾在非首次交尾時的精胞主體容積隨交尾間隔期間之增加而增大;並且連日交尾雄蛾,尤其是非首次交尾之長壽組雄蛾的精胞主體容積最小,顯示雄蛾可藉間隔休息期間逐漸恢復形成精胞之能力。 |
英文摘要 | The tobacco cutworm, Spodoptera litura (Fabricius), was reared on an artificial diet under constant conditions (25°C, 75+-5% RH, 13L:11D). The results indicate that adult males can be divided into two groups: one having lower mating frequency and shorter longevity (<=9 days), the other with higher mating frequency and greater longevity (>= 10 days). The average longevity of the former was 5.30+-2.06 days, and that of the latter was 13.65+-2.43 days. The mating frequency of the long-lived type was higher than that of shor-lived one. In both groups, mating frequency did not increase at a fixed rate as longevity was prolonged. Moreover, at the onset of mating, multiple-mated males showed a larger volume of the corpus of spermatophore, which decreased as mating frequency increased. The age of males (X, days) in the long-lived group and the average volume of the corpus of spermatophores (Y, mm3) were correlated by the linear regression, Y=4.98-0.19×(r2=0.86**). Accordingly, as longevity increased, the volume of the corpus of spermatophores decreased. Furthermore, the accumulative average volume of the corpus of spermatophores increased as male age increased in both groups, and revealed a significant positive linear regression relationship. The average volume of the corpus of spermatophores of first-mated males was larger than that of non-first-mated males. The average volume of the corpus of spermatophores of the short-lived male group was larger than that of the long-lived male group. When the short lived male group mated for the first time, the longer premating period induced the larger volume of the corpus of spermatophores. When the long-lived male group mated other than for the first time, the longer intermittent duration induced the large volume of the corpus of spermatophores. The volume of the corpus of spermatophores of successive mating males, especially that of the long-lived male group at non-first mating was the smallest. This suggests that the interval between each mating contributes to the recovery of the male's volume of the corpus of spermatophores. |
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