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題 名 | 綠豆象(Callosobruchus chinensis (L.)) (Coleoptera: Bruchidae)雄蟲干擾對雌蟲產卵行為之影響=Effects of Male Interference on Oviposition Behavior of the Adzuki Bean Weevil, Callosobruchus chinensis (L.), (Coleoptera: Bruchidae) |
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作 者 | 藍艷秋; 洪淑彬; | 書刊名 | 中華昆蟲 |
卷 期 | 19:3 1999.09[民88.09] |
頁 次 | 頁249-256 |
分類號 | 387.785 |
關鍵詞 | 豆象; 求偶干擾; 平均擁擠度; 產卵數; Bean weevil; Male harassment; Mean crowding; Total eggs laid; |
語 文 | 中文(Chinese) |
中文摘要 | 綠豆象(Callosobruchus chinensis (L.))具均勻產卵的特性,可減少其幼蟲競爭 ,使子代適存值增大。然而當有雄蟲存在時,雄蟲的求偶行為,會對雌蟲產生一定程度的干 擾,進而影響產卵分布,降低子代適存值。本研究中以不同供蟲時間及不同的雄蟲密度處理 雌蟲,記錄雌蟲的產卵數、產卵分布、以及壽命。 試驗結果發現雌蟲與 4 隻雄蟲配對,產 卵數明顯低於與 1 隻雄蟲配對久雌蟲,顯示雄蟲密度過高時會降低雌蟲產卵數。 當雌蟲突 然遭受雄蟲求偶干擾時,卵平均擁擠度會顯著上升,但這種效應在處理後一天即消失。顯示 雄蟲的突然干擾會造成產卵中雌蟲行為的改變,導致雌蟲產卵不均勻,但雌蟲能在短時間內 即產生適應行為。以不同密度雄蟲與雌蟲配對時,單隻雌蟲產卵之平均擁擠度,高於多隻雄 蟲處理組,因此反而無法由平均擁擠度看到干擾效應的存在。故雄蟲的干擾對子代競爭的影 響, 是正面或負面則尚無定論。 若從雌蟲生殖花費 (cost of reproduction) 權衡 (trade-off) 的角度來探討雄蟲的干擾效應,可知單隻雌蟲之壽命與總產卵數皆顯著高於 4 隻雄蟲處理組。顯示過多的雄蟲干擾會降低雌蟲壽命與生殖力,進而降低雌蟲適存值。 |
英文摘要 | Females of Callosobruchus chinensis (L.) produce a nearly uniform distribution of eggs on beans. This behavior results in minimizing larval competition within beans, and increasing the survival rate of larvae. Since the female behaves reluctantly after mating has occurred, the presence of a virgin male can induce solicitation behaviour which causes harassment to the female. Further, since females spend most of their time on oviposition and resting, the solicitation behavior of males therefore introduces interference to the oviposition behavior of the females. In this study, we manipulate differences in teime schedules of offering virgin males and densities of virgin males to test the effects of male interference on egg dispersion behavior, total numbers of eggs laid and longevity of females. The total numbers of eggs laid by females paired with four virgin males were significantly lower than those of females paired with one virgin male for 9 h. Therefore, a high density of virgin males, which introduced a high frequency of interference, resulted in decreasing fecundity of females. When offering virgin males with a different time schedule, females paired with two virgin males at the 24th hour from the beginning of the experiment showed significantly higher mean crowding on the 2 day than did females paired with two virgin males at the beginning of the experiment, but there were no differences the day after. This result suggests that male solicitation behavior causes interference to female egg dispersion behavior, but the female immediately adapts after 1 d. Contrary to previous predictioins, a high density of males did not result in an increase in the mean crowding of eggs. Females paired with one male for 9 h showed higher mean crowding from the 2 day than did females paired with sveral males. The two levels of effects by manipulation of time scheduling and density of virgin males suggest that the effects of male harassment on fitness of offspring are complex and require further study. Comparison of trade-offs between longevity and total number of eggs laid by females suggests that females pairing with more males can cause reduction in both longevity and total number of eggs laid. Therefore, excessive male solicitation behavior can cause interference which can decrease fitness of the female. |
本系統中英文摘要資訊取自各篇刊載內容。