摘要
在30℃、75%RH条件下研究玉米象Sitophilus zeamais与谷蠹Rhizopertha dom inica的种间竞争,并采用Votka-Volterra种间竞争模型进行拟合,结果表明玉米象与谷蠹单独饲养时的种群数量均明显高于混合饲养时的种群数量,2物种之间存在着明显的种间竞争关系,属于资源利用型竞争;单独饲养和混合饲养下玉米象的种群数量均大于谷蠹的种群数量;混合饲养条件下,2个物种处于一种不稳定的平衡状态,谁取胜取决于2个物种的初始状态对谁更有利,在这个竞争系统中,玉米象为优势种。
Sitophilus zeamais and Rhizopertha dominica were reared at 30℃ and 75 RH, and interspecific competition between them was studied. The Votka-Voherra equation was used to simulate the competition. The results showed that the population size of either of the insects when they were reared separately was significantly greater than when they were in mixture rearing, suggesting the existence of a marked interspecific competition. The population of S. zeamais reared either singly or together with R. dominica was greater than that of the latter reared singly. The two species were in an unstable equilibrium under the mixed rearing condition, and which would be the winner depended on their original state. S. zeamais appeared to be the dominant species in this competition system.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2005年第6期864-867,共4页
Journal of Southwest Agricultural University
基金
重庆市科委攻关资助项目(CSTC
2004AC1003)
重庆市教委科学技术研究资助项目(KJ030204)
关键词
种间竞争
玉米象
谷蠹
interspecific competition
Sitophilus zeamais
Rhizopertha dominica
