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目的研究美洲大蠊取食过的饲料对德国小蠊摄食行为的影响,从食源方面探讨德国小蠊逐步取代美洲大蠊的原因。方法采用单一摄食法、形状选择摄食法和Y型嗅觉仪实验方法,观察德国小蠊的摄食情况。结果单一摄食实验第2~12天,德国小蠊对美洲大蠊取食过的饲料(饵料B)摄食量是新鲜饲料(饵料A)的33.48倍,差异有统计学意义(P<0.05);实验第14~26天,德国小蠊对两种饵料的摄食量差异无统计学意义(P>0.05);而第28~36天,德国小蠊对饵料A的摄食量是饵料B的3.02倍,差异有统计学意义(P<0.05)。Y型嗅觉仪实验结果显示德国小蠊对饵料B的摄食量呈正趋向性。饵料形状对德国小蠊的摄食量无影响(P>0.05)。结论德国小蠊对美洲大蠊摄食食源的高度适应性,增加了德国小蠊的生存机会。
Objective To study the effects of feeding on cockroaches in cockroaches and the feeding causes of cockroaches in the United States. Methods The feeding status of German cockroaches was observed by the method of single ingestion, shape selective feeding and Y - type olfactometer. Results The results showed that the intake of feed (bait B) to cockroach was only 33.48 times higher than that of fresh feed (bait A) on the 2nd to 12th days of single feeding experiment. The difference was statistically significant (P <0.05). On the 14th to 26th days of the experiment, there was no significant difference in the food intake of Blattella germanica between the two diets (P> 0.05). On the 28th to 36th days, the feed intake of the German cockroach A was 3.02 times that of the feed B , The difference was statistically significant (P <0.05). Y-type olfactometer test results show that the German cockroach bait B feed intake is a positive trend. Feeding shape had no effect on the food intake of Blattella germanica (P> 0.05). Conclusion The high adaptability of Blattella germanica to food intake of American cockroach increased the chance of survival of German cockroach.