摘要
研究干旱地区蛛形纲动物的含能值变动规律。蛛形纲蝎目和蜘蛛目动物含能值之间的差异不显著 ,平均含能值为2 1 .32 J/mg无灰干重。但是蝎目钳蝎科 ( 2 2 .1 3J/mg无灰干重 )、蜘蛛目的圆蛛科 ( 2 2 .82 J/mg无灰干重 )、巨眼蛛科( 2 2 .65J/mg无灰干重 )、跳蛛科 ( 2 3.0 8J/mg无灰干重 )和狼蛛科 ( 2 1 .76J/mg无灰干重 )的含能值显著地高于蟹蛛科 ( 1 9.0 4 J/mg无灰干重 )和盗蛛科 ( 1 9.65J/mg无灰干重 )。蛛形纲动物含能值具有显著的季节变化 ,平均含能值最高为秋季( 2 3.0 5J/mg无灰干重 ) ,最低为春季 ( 1 9.58J/mg无灰干重 )。蛛形纲动物不同体区的含能值具有显著差别 ,腹部的含能值最高 ( 2 2 .4 8J/mg无灰干重 ) ,其次为头胸部 ( 2 1 .0 8J/mg无灰干重 ) ,四肢的含能值最低 ( 2 0 .2 4 J/mg无灰干重 )。不同体区含能值同样也表现出季节变动 ,最高为秋季 (平均值 2 2 .98J/mg无灰干重 ) ,最低为春季 (平均值 1 9.80 J/mg无灰干重 )。蛛形纲动物含能值与其含水量成不显著负相关 ( -0 .2 2 1 ) ,与其腹部、头胸部和四肢的含能值成显著正相关 ( r相应为 0 .757、0 .680和 0 .70 3) ,并与其体重成显著正相关 ( r=0 .371 )。本文就蛛形纲动物作为猎物 ,其含能值显著变动对食虫动物食物选择的影响也?
The energy content and their seasonal variations of Arachnida in arid environment were studied.There was no significant difference between the energy content of Scorpionida and that of Araneae,their mean energy content was 21.32 J/mg ash free dry weight.However,the energy content in families of Buthidae (22.13 J/mgAFDW),Araneidae (22.82J/mgAFDW),Dinopidae (22.65J/mgAFDW),Salticidae (23.08J/mgAFDW) and Lycosidae (21.76J/mgAFDW)were significantly higher than that in Thomisidae (19.04J/mgAFDW) and Pisauridae (19.65J/mgAFDW).The energy content of Arachnida exhibited significantly seasonal variations and the maximum was found in autumn (23.05J/mgAFDW) and the minimum in spring (19.58 J/mg AFDW).The energy content of different body regions in Arachnida showed significant variations.The highest energy content was found in opithosoma (22.48 J/mg AFDW),medium in prosoma (21.08 J/mg AFDW),and lowest in legs(20.24 J/mg AFDW).The energy content of different body regions in Arachnida also exhibited significantly seasonal variations,with the maximal values in autumn (the mean was 22.98 J/mg AFDW) and minimal in spring (the mean was 19.80 J/mg AFDW).The energy content of Arachnida correlated negatively to their water content,positively to the energy content of opithosoma,prosoma and legs,and also positively to body mass.The influence of significant variations in energy content of prey Arachnida on the food selection of insectivores was discussed.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第6期977-981,共5页
Acta Ecologica Sinica
基金
澳大利亚悉尼大学生命科学院野生动物研究所的资助支持
