Pheidole oxyops builds subterranean nests, with an external architecture that is distinctive and easily recognizable by its wide and specific entrance hole, measuring up to 12.2 cm in diameter, denoting a pitfall-trap...Pheidole oxyops builds subterranean nests, with an external architecture that is distinctive and easily recognizable by its wide and specific entrance hole, measuring up to 12.2 cm in diameter, denoting a pitfall-trap. In order to study the nests＇ internal architecture, seven nests were excavated; four were identified with neutral talc, while the others were cast in cement and then excavated. Measurements were made in order to gain a better understand- ing of their structures, and a photographic documentation was obtained as well. The excavations revealed that the nests are perpendicular relative to the ground, beginning with a cylindrical channel with a mean length of 13.5 cm, containing irregular formations, and whose diameter becomes progressively narrower until the first chamber is formed. As the channel continues, dish-like chambers appear, interconnected by channels that become progressively narrower and longer, while the chambers are arranged at greater distances from each other as nest depth increases. Both channels and chambers are located on the vertical projection of the entrance hole. Nests may reach a depth of up to 5.09 m, with a number of chambers ranging between 4 and 14.展开更多
【目的】独栖蜂黄缘蜾蠃Anterhynchium flavomarginatum是农林业害虫的重要天敌之一。本研究旨在明确黄缘蜾蠃的产卵策略及其对寄生胁迫的行为响应,为农林业害虫生物防治提供基础依据。【方法】2018-2020年,在广东车八岭国家级自然保护...【目的】独栖蜂黄缘蜾蠃Anterhynchium flavomarginatum是农林业害虫的重要天敌之一。本研究旨在明确黄缘蜾蠃的产卵策略及其对寄生胁迫的行为响应,为农林业害虫生物防治提供基础依据。【方法】2018-2020年,在广东车八岭国家级自然保护区及周边区域使用根据公里网格方案(共计100个调查网格,网格大小为1 km 2)设置的人工巢管调查了黄缘蜾蠃的产卵策略及其与寄生胁迫之间的关系。通过连续采集该蜂的筑巢巢管并饲养调查,我们详细记录了每根巢管的孵育室数量及其子代在巢管里的性比和被寄生情况,并测量了每根巢管的长度、内径和巢室结构特征。【结果】2018-2020年中,我们获得了黄缘蜾蠃筑巢的巢管达3733根和孵育室9269个,其中被寄生的孵育室达1420个。黄缘蜾蠃在单根巢管内平均产2.50±1.25枚卵,构建非孵育室1.84±1.14个,其子代性比偏雄(雄∶雌=1.98∶1),并倾向于在巢管内端的孵育室产雌性卵,在外端的孵育室产雄性卵。结构方程模型分析结果显示,每根巢管的巢管内径和长度均显著地正影响孵育室数量,巢管长度也显著地正影响非孵育室数量,而孵育室数量和非孵育室数量均显著地负影响被寄生率。对子代在巢管内的性别排列模式进行meta分析表明,巢管最内端子代雌性数量显著高于最外端的,而巢管最内端孵育室的被寄生率显著低于最外端的。【结论】结果表明黄缘蜾蠃在寄生胁迫下通过在巢管内多产卵以降低被寄生风险,并可通过调节子代的性别分配模式以提高雌性子代的存活率,从而有助于提高其繁殖适合度。展开更多
文摘Pheidole oxyops builds subterranean nests, with an external architecture that is distinctive and easily recognizable by its wide and specific entrance hole, measuring up to 12.2 cm in diameter, denoting a pitfall-trap. In order to study the nests＇ internal architecture, seven nests were excavated; four were identified with neutral talc, while the others were cast in cement and then excavated. Measurements were made in order to gain a better understand- ing of their structures, and a photographic documentation was obtained as well. The excavations revealed that the nests are perpendicular relative to the ground, beginning with a cylindrical channel with a mean length of 13.5 cm, containing irregular formations, and whose diameter becomes progressively narrower until the first chamber is formed. As the channel continues, dish-like chambers appear, interconnected by channels that become progressively narrower and longer, while the chambers are arranged at greater distances from each other as nest depth increases. Both channels and chambers are located on the vertical projection of the entrance hole. Nests may reach a depth of up to 5.09 m, with a number of chambers ranging between 4 and 14.
文摘【目的】独栖蜂黄缘蜾蠃Anterhynchium flavomarginatum是农林业害虫的重要天敌之一。本研究旨在明确黄缘蜾蠃的产卵策略及其对寄生胁迫的行为响应,为农林业害虫生物防治提供基础依据。【方法】2018-2020年,在广东车八岭国家级自然保护区及周边区域使用根据公里网格方案(共计100个调查网格,网格大小为1 km 2)设置的人工巢管调查了黄缘蜾蠃的产卵策略及其与寄生胁迫之间的关系。通过连续采集该蜂的筑巢巢管并饲养调查,我们详细记录了每根巢管的孵育室数量及其子代在巢管里的性比和被寄生情况,并测量了每根巢管的长度、内径和巢室结构特征。【结果】2018-2020年中,我们获得了黄缘蜾蠃筑巢的巢管达3733根和孵育室9269个,其中被寄生的孵育室达1420个。黄缘蜾蠃在单根巢管内平均产2.50±1.25枚卵,构建非孵育室1.84±1.14个,其子代性比偏雄(雄∶雌=1.98∶1),并倾向于在巢管内端的孵育室产雌性卵,在外端的孵育室产雄性卵。结构方程模型分析结果显示,每根巢管的巢管内径和长度均显著地正影响孵育室数量,巢管长度也显著地正影响非孵育室数量,而孵育室数量和非孵育室数量均显著地负影响被寄生率。对子代在巢管内的性别排列模式进行meta分析表明,巢管最内端子代雌性数量显著高于最外端的,而巢管最内端孵育室的被寄生率显著低于最外端的。【结论】结果表明黄缘蜾蠃在寄生胁迫下通过在巢管内多产卵以降低被寄生风险,并可通过调节子代的性别分配模式以提高雌性子代的存活率,从而有助于提高其繁殖适合度。
