为解决无法用文字实现对近千种连续变化的昆虫体色进行准确的描述和合理的数学运算问题,本文采用国际标准颜色计量技术-PFG(Pantone Formula Guide)颜色指南为昆虫体色性状判别标准,提出了关于数值化描述昆虫体色的相关评价指标,如体色...为解决无法用文字实现对近千种连续变化的昆虫体色进行准确的描述和合理的数学运算问题,本文采用国际标准颜色计量技术-PFG(Pantone Formula Guide)颜色指南为昆虫体色性状判别标准,提出了关于数值化描述昆虫体色的相关评价指标,如体色元(body-colorelement,BCE)、体色群(body-color group,BCG)、体色位(body-colorposition,BCP)、高频色码指数(high frequency color-code index,HFI)和杂色指数(variegated color index,VCI)等及其定量分析方法。并应用这些指标和方法,研究了甘薯天蛾Agrius convolvuli幼虫个体在相似环境条件下体色分化的多样性以及不同发育日龄和不同虫体部位(体位)其体色的演化过程及其数值规律,发现甘薯天蛾幼虫存在着共同的主体色,而且其体色的变异主要发生在个体的不同发育日龄(占总变异的72.66%),其次,虫体不同部位的颜色也有明显的差异(占总变异的24.45%),而同一发育日龄个体间的体色差异仅占总变异的2.88%。结果说明,甘薯天蛾幼虫体色随其发育日龄所发生的变化过程,可能是由遗传因子所决定的一种生命体从发育到衰老的表观呈现过程。展开更多
A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:M...A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:Mermithidae),named Romanoraermis yunanesis. Besides the diagnostic feature of the genus, the main characters of this new species are: Female:Boby length 21.1mm (n=36, r=14.6-28.6, SE=0.49) .Width at the vagina 164 (n=33, r = 118-212, SE=4.05) . Vagina pear shaped the midway of Vaginal canal with a distinctive flexure: The anterior ovary is shorter than the posterior one. V=35.94845.9 (n=36, r=43 55, SE = 0.50) . Cuticle thicker, the cuticle thickness at the vagina 11.9,at the posterior end 22.6 (n=34, r=13.1 41.8, SE=1.36) . Male:Body length 14.1mm(n = 32,r = 7.8 17.6,SE = 0.37).Width at the midbody 120 (n=32, r=89-144, SE=2.42) .Two separate curved spicules are not uniform in length,the longer spicule length 339 (n=32,r=280 410, SE=5.6), ratio of body length to spicule length is 41.7 (n=32, r=27.6 51.5, SE=0.95),the shorter spicule length 327 (n=32, r=251 400, SE=6.9) ,Caudal papillae in three rows, the middle row with 34, lateral rows 22. Diagnosis: (1) R..yunanensis is separated from the other species of the genus with the exception of R.jingdeensis, R.wuchangensis, R.culicivorax and R.iyengari by the distinct flexure of its vagina. (2) It differs from R.culicivorax (25.2) and R. iyengari (26.2) and R.siehuanensis (22.7) in its larger ratio of body length to sp icule length (41.7) . (3) The position of the vulva is more anterior in R.yunan- ensis than in R.jingdeensis (P<0.01). Besides that, the length of two ovaries are not uniform in R. yunanensis (V=35.94845.9), but almost uniform in R.jingdeensis (V=4031.841) and the ratio of body length to spicule length in R.yunanensis is also larger than in R.jingdeensis (37.8).(4)The ratio of its body length to spicule length differs from that of R.wuchangensis (35.7)and the position of vulva is more anterior than that of R.wuchangensis (>50%), the two ovaries and two spicules are not uniform in length. They also differ from those of R.wuchangensis. Type Host and Locality∶Culex fatigans larvae are collected from the region of Xinyang. (Measurements are in micrometers unless otherwise noted. n=number of sp ecimens, r=range, SE=standard error.)展开更多
文摘为解决无法用文字实现对近千种连续变化的昆虫体色进行准确的描述和合理的数学运算问题,本文采用国际标准颜色计量技术-PFG(Pantone Formula Guide)颜色指南为昆虫体色性状判别标准,提出了关于数值化描述昆虫体色的相关评价指标,如体色元(body-colorelement,BCE)、体色群(body-color group,BCG)、体色位(body-colorposition,BCP)、高频色码指数(high frequency color-code index,HFI)和杂色指数(variegated color index,VCI)等及其定量分析方法。并应用这些指标和方法,研究了甘薯天蛾Agrius convolvuli幼虫个体在相似环境条件下体色分化的多样性以及不同发育日龄和不同虫体部位(体位)其体色的演化过程及其数值规律,发现甘薯天蛾幼虫存在着共同的主体色,而且其体色的变异主要发生在个体的不同发育日龄(占总变异的72.66%),其次,虫体不同部位的颜色也有明显的差异(占总变异的24.45%),而同一发育日龄个体间的体色差异仅占总变异的2.88%。结果说明,甘薯天蛾幼虫体色随其发育日龄所发生的变化过程,可能是由遗传因子所决定的一种生命体从发育到衰老的表观呈现过程。
基金National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2009BADB2B02)Fujian Provincial Fundamental Scientific Research Program for Non-profit Research Institution(2014R1011-2)Fujian Provincial Key Laboratory of Forest Silviculture and Forest Product Processing Utilization
文摘A species of mermithid nematode was found parasitizing the larvae of Culex fatigans in the region of Xinyang County, Henan Province in 1984. It was ident- ified as a new species of the genus Roraanomerrais (Nematoda:Mermithidae),named Romanoraermis yunanesis. Besides the diagnostic feature of the genus, the main characters of this new species are: Female:Boby length 21.1mm (n=36, r=14.6-28.6, SE=0.49) .Width at the vagina 164 (n=33, r = 118-212, SE=4.05) . Vagina pear shaped the midway of Vaginal canal with a distinctive flexure: The anterior ovary is shorter than the posterior one. V=35.94845.9 (n=36, r=43 55, SE = 0.50) . Cuticle thicker, the cuticle thickness at the vagina 11.9,at the posterior end 22.6 (n=34, r=13.1 41.8, SE=1.36) . Male:Body length 14.1mm(n = 32,r = 7.8 17.6,SE = 0.37).Width at the midbody 120 (n=32, r=89-144, SE=2.42) .Two separate curved spicules are not uniform in length,the longer spicule length 339 (n=32,r=280 410, SE=5.6), ratio of body length to spicule length is 41.7 (n=32, r=27.6 51.5, SE=0.95),the shorter spicule length 327 (n=32, r=251 400, SE=6.9) ,Caudal papillae in three rows, the middle row with 34, lateral rows 22. Diagnosis: (1) R..yunanensis is separated from the other species of the genus with the exception of R.jingdeensis, R.wuchangensis, R.culicivorax and R.iyengari by the distinct flexure of its vagina. (2) It differs from R.culicivorax (25.2) and R. iyengari (26.2) and R.siehuanensis (22.7) in its larger ratio of body length to sp icule length (41.7) . (3) The position of the vulva is more anterior in R.yunan- ensis than in R.jingdeensis (P<0.01). Besides that, the length of two ovaries are not uniform in R. yunanensis (V=35.94845.9), but almost uniform in R.jingdeensis (V=4031.841) and the ratio of body length to spicule length in R.yunanensis is also larger than in R.jingdeensis (37.8).(4)The ratio of its body length to spicule length differs from that of R.wuchangensis (35.7)and the position of vulva is more anterior than that of R.wuchangensis (>50%), the two ovaries and two spicules are not uniform in length. They also differ from those of R.wuchangensis. Type Host and Locality∶Culex fatigans larvae are collected from the region of Xinyang. (Measurements are in micrometers unless otherwise noted. n=number of sp ecimens, r=range, SE=standard error.)
