Koehler P G, Strong C A, Patterson R S
Department of Entomology and Nematology, University of Florida, Gainesville 32611.
J Econ Entomol. 1994 Jun;87(3):699-704. doi: 10.1093/jee/87.3.699.
Adults and nymphal cohorts of the German cockroach, Blattella germanica (L.), were allowed 24 h to select preferred harborage widths from eight harborages between 1.59 and 12.72 mm (increments of 1.59 mm) in both individual and combined cohort studies. In individual cohort studies, 1- and 2-wk-old nymphs significantly preferred 1.59-mm-wide harborage, with 74 and 68%, respectively; 3- and 4-wk-old nymphs significantly preferred 3.18-mm-wide harborage, with 63 and 45%, respectively; 5-wk-old nymphs selected the 4.77-mm-wide harborage; and 6-wk-old nymphs were evenly distributed in 3.18- to 9.54-mm-wide harborages. Males were in 6.36- to 12.72-mm-wide harborages. Nongravid females (81%) were in 4.77-, 6.36-, and 11.13-mm-wide harborages; gravid females (94%) preferred 4.77- and 6.36-mm-wide harborages. The percentage of nymphs outside harborages decreased as cockroach age increased from 1 to 5 wk. In combined cohort studies, preferred harborage widths for all cohorts and sexes were 6.36-7.95 mm and 11.13-12.72 mm. The percentage of nymphs outside harborages was low and constant (< 4.57%) irrespective of age or sex.
在个体和混合群体研究中，给予德国小蠊（Blattella germanica (L.)）的成虫和若虫群体24小时，让它们从8个宽度在1.59至12.72毫米（以1.59毫米递增）的栖息处中选择偏好的栖息处宽度。在个体群体研究中，1周龄和2周龄的若虫显著偏好1.59毫米宽的栖息处，分别占74%和68%；3周龄和4周龄的若虫显著偏好3.18毫米宽的栖息处，分别占63%和45%；5周龄的若虫选择4.77毫米宽的栖息处；6周龄的若虫均匀分布在3.18至9.54毫米宽的栖息处。雄性分布在6.36至12.72毫米宽的栖息处。未孕雌虫（81%）分布在4.77、6.36和11.13毫米宽的栖息处；孕雌虫（94%）偏好4.77和6.36毫米宽的栖息处。随着蟑螂年龄从1周增加到5周，栖息处外若虫的百分比下降。在混合群体研究中，所有群体和性别的偏好栖息处宽度为6.36 - 7.95毫米和11.13 - 12.72毫米。无论年龄或性别如何，栖息处外若虫的百分比都很低且恒定（<4.57%）。
