南黃薊馬之生殖機制 (Ⅲ). 孤雌與兩性生殖所產蟲體之發育與性比

Abstract

南黃薊馬（Thrips palmi Karny）孤雌生殖所產雄蟲與兩性生殖所產雌蟲或雄蟲自卵發育為成蟲需11.4～11.9日，有62.1～65.2％之卵可發育為成蟲，發育期與存活率在不同來源與性別之蟲體間並無統計上之差異。羽化後首日即交尾之雌蟲，交尾一次後一生均可產出雌蟲，於第1、2產卵日所產以雄蟲比例較高，此後雌雄蟲以不規則比例間互生出，總平均一生所產雌雄蟲比值1.8。羽化後先行孤雌生殖，至第4－9日才交尾之雌蟲，於交尾後產下之後代以雌蟲占多數，自交尾以後所產後代總數之雌雄比值平均3.6，於交尾後5日內所產後代之雌雄比值平均更高達4.9，雌蟲有依交尾情況調節其產卵性別之現象。 The progenies of Thrips palmi Karny reproduced parthenogenetically and bisexually required 11.4-11.9 days to develop from eggs to adults. In average 62.1-65.2% of the eggs could develop to adults. There was no statistical difference of those data among various sources or sexes of the progenies. The female thrips mating immidately after the emergence reproduced mostly males in the first 2 ovipositional days. Then the females and males at various rate were reproduced throughout the whole ovipositional period. The average female/male sex ratio was 1.8. Female thrips being compelled to keep their virginity for 4-9 days after emergence, would lay more female eggs after mating. In this case, the female/male value of the total progenies reproduced after mating was 3.6, and this value of progenies reproduced within 5 days after mating was 4.9. Females tended to adjust the sex of the progenies according to the mating situations.