橘小实蝇和番石榴实蝇幼虫之间的竞争机制  

Mechanism of interspecific competition between Bactrocera dorsalis(Hendel)and Bactrocera correcta(Bezzi)during larval stage

作　　者：刘慧 龚碧涯[1] 向敏 林文力[1] 刘元 马骏 肖伏莲[1] LIU Hui;GONG Bi-Ya;XIANG Min;LIN Wen-Li;LIU Yuan;MA Jun;XIAO Fu-Lian(Scientific Observation and Experiment Station of Fruit Trees in Central China,Ministry of Agriculture and Rural Affairs,Hunan Horticultural Research Institute,Hunan Academy of Agricultural Sciences,Changsha 410125,China;Guangzhou Customs District Technology Center,Guangzhou 510623,China)

机构地区：[1]湖南省农业科学院园艺研究所,农业农村部华中地区果树科学观测实验站,长沙410125 [2]广州海关技术中心,广州510623

出　　处：《环境昆虫学报》2023年第1期239-245,共7页Journal of Environmental Entomology

基　　金：湖南省农业科技创新资金项目(2021CX23,2020CX25);湖南省自然科学基金(2019JJ50339);湖南省水果产业技术体系水果植保岗位(2019-2023)。

摘　　要：为了明确橘小实蝇Bactrocera dorsalis(Hendel)和番石榴实蝇Bactrocera correcta(Bezzi)资源利用的种间竞争机制,比较两者的竞争实力,本文研究了两种实蝇幼虫在26℃条件下于人工饲料和番石榴中的种间竞争关系。结果显示,两种实蝇同龄幼虫在共同饲养的竞争条件下,橘小实蝇幼虫期缩短、存活率提高,而番石榴实蝇蛹重变轻、存活率降低,橘小实蝇通过加快自身生长和抑制番石榴实蝇生长的方式在资源利用竞争中获得更多资源。因此,两种实蝇幼虫在种间竞争中,橘小实蝇可通过调整生活史对策获得竞争优势。To clarify the mechanism of interspecific competition arising from resource utilization and compare the competitive strength between the larvae of Bactrocera dorsalis(Hendel)and Bactrocera correcta(Bezzi),this study explored the relationships of interspecific competition between the two species of larvae on artificial diet and guava at 26℃.The results showed that,with the same instar,under co-breeding conditions,B.dorsalis showed a shortened larval stage and increased survival rate;however,B.correcta presented that pupa weight became lighter and survival rate decreased.B.dorsalis gained more resources in resource exploitative competition by accelerating its own growth and inhibiting the growth of B.correcta.Therefore,in the interspecific competition between the larvae of the two fruit flies,B.dorsalis gained competitive advantage by adjusting life history strategies.

关 键 词：种间竞争 资源利用竞争 历期 蛹重 存活率 

分 类 号：Q968.1[生物学—昆虫学] S433[农业科学—农业昆虫与害虫防治]