Abstract Anastrepha ludens (Loew) (Diptera: Tephritidae) is an endemic pest of Mexico, attacking several fruits of economic importance. The Sterile Insect Technique (SIT), consisting of mass-rearing, irradiation and release of adults, is used to control this pest in affected areas. Currently, a genetic sexing strain (Tapachula 7, Tap-7) consisting only of A. ludens males is being released, yet we lack information on its sexual performance at the early ages when they are released and on its post copulatory behavior in terms of sperm transfer and mating inhibition. Here, sexual competitiveness at young ages and ability to inhibit female re-mating was compared between sterile Tap-7, Standard Bisexual (SB), or wild males both in laboratory and field cage conditions. Sperm stored by females mating with wild, Tap-7, or SB strain males was also compared. Six-day-old sterile Tap-7 males had low mating rates, however, by 7 d of age 80% of males had mated. Tap-7 males were just as likely as wild males to inhibit wild female re-mating. In field cages, sterile Tap-7 males mated faster than wild and sterile males from the SB strain and had comparable mating success to wild males. Females mated to sterile Tap-7 males stored more sperm than those mated to sterile SB males. Females mated to wild males stored more sperm than females mated to any other type of male. Mass-rearing had a greater effect on decreasing sperm stored by females than irradiation. We recommend continuing the release of the GSS strain of A. ludens.

中文翻译：

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Anastrepha ludens（双翅目：实蝇科）的遗传性别菌株 Tapachula-7 的交配前和交配后的竞争力

摘要 Anastrepha ludens (Loew) (Diptera: Tephritidae) 是墨西哥的一种地方性害虫，攻击多种具有重要经济意义的水果。昆虫不育技术 (SIT) 由大量饲养、辐照和成虫释放组成，用于控制受影响地区的这种害虫。目前，一种仅由 A. ludens 雄性组成的遗传性分性品系 (Tapachula 7, Tap-7) 正在被释放，但我们缺乏有关其在释放时的早期性行为及其交配后行为的信息精子转移和交配抑制。在这里，在实验室和野外笼子条件下，在不育的 Tap-7、标准双性 (SB) 或野生雄性之间比较了年轻时的性竞争力和抑制雌性重新交配的能力。还比较了与野生、Tap-7 或 SB 品系雄性交配的雌性储存的精子。6 天大的不育 Tap-7 雄性交配率较低，但是，到 7 天龄时，80% 的雄性已经交配。Tap-7 雄性与野​​生雄性抑制野生雌性重新交配的可能性一样。在田间笼子里，不育的 Tap-7 雄性比来自 SB 品系的野生和不育雄性交配得更快，并且交配成功率与野生雄性相当。与不育的 Tap-7 雄性交配的雌性比与不育的 SB 雄性交配的雌性储存更多的精子。与野生雄性交配的雌性比与任何其他类型雄性交配的雌性储存更多的精子。与辐射相比，大规模饲养对减少雌性储存的精子的影响更大。我们建议继续释放 A. ludens 的 GSS 菌株。在田间笼子里，不育的 Tap-7 雄性比来自 SB 品系的野生和不育雄性交配得更快，并且交配成功率与野生雄性相当。与不育的 Tap-7 雄性交配的雌性比与不育的 SB 雄性交配的雌性储存更多的精子。与野生雄性交配的雌性比与任何其他类型雄性交配的雌性储存更多的精子。与辐射相比，大规模饲养对减少雌性储存的精子的影响更大。我们建议继续释放 A. ludens 的 GSS 菌株。在田间笼子里，不育的 Tap-7 雄性比来自 SB 品系的野生和不育雄性交配得更快，并且交配成功率与野生雄性相当。与不育的 Tap-7 雄性交配的雌性比与不育的 SB 雄性交配的雌性储存更多的精子。与野生雄性交配的雌性比与任何其他类型雄性交配的雌性储存更多的精子。与辐射相比，大规模饲养对减少雌性储存的精子的影响更大。我们建议继续释放 A. ludens 的 GSS 菌株。与辐射相比，大规模饲养对减少雌性储存的精子的影响更大。我们建议继续释放 A. ludens 的 GSS 菌株。与辐射相比，大规模饲养对减少雌性储存的精子的影响更大。我们建议继续释放 A. ludens 的 GSS 菌株。