摘要
2004年7月中旬对杭州湾南岸伍氏厚蟹进行了取样调查和统计分析,结果表明不同生境下伍氏厚蟹的种群密度、生物量存在极显著的差异.杭州湾南岸伍氏厚蟹的种群密度分别为:围垦滩涂(23.00±5.86)只/m2,主要道路基地(10.72±2.32)只/m2,自然滩涂(6.36±1.43)只/m2;生物量分别为:围垦滩涂(172.27±43.89)g/m2,主要道路基地(120.28±26.03)g/m2,自然滩涂(61.88±13.91)g/m2.整体样本及各生境雌雄样本的个体头胸甲长、头胸甲宽和体质量之间都存在显著的线性回归关系,其中头胸甲宽和体质量之间的线性回归方程与预测值拟合程度最高.同时,发现各个生境伍氏厚蟹个体及雌雄个体的头胸甲长、头胸甲宽和体质量之间存在一定的差异.
A seven-days investigation （11 -17, July, 2004） had been carried out at the Cixi tidal flat of the south bank of Hangzhou Gulf to investigate the population characters of Helice wuana, which was one of the dominant species in Cixi tidal flat. The results showed that there was significant difference on population density and biomass among different habitats. The density of the crabs in the reclaimed area was （ 23.00 ± 5.86 ） individuals/m^2, main road basement （ 10. 72 ± 2. 32） individuals/m^2, tidal flat （ 6. 36 ± 1. 43 ） individuals/m^2, respectively, with the corresponding biomass （wet weight） being （172.27 ± 43.89） g/m^2, （ 120.28 ± 26.03 ） g/m^2, （ 61.88 ± 13.91 ） g/m^2. There was a significant liner regression relationship between body length and wet weight, between body width and wet weight, especially the fit of the latter was much accurate. It was also found that there existed substantial distinction among these samples from different habitats, as well as the discovery of the differentiation about the body length, body width, wet weigh from one Helice wuana to another, from male to female.
出处
《浙江师范大学学报（自然科学版）》
CAS
2007年第4期460-466,共7页
Journal of Zhejiang Normal University:Natural Sciences
基金
浙江省自然科学基金重大项目资助(ZE0204)
