坡度与滑坡发育规模、广度及深度相关性探讨     

侯德波  宁飞  尹飞  康杰 《云南地质》2013,32(2):238-240

滑坡发育规模、广度、深度与坡度有一定相关性,坡度增大滑坡向小型化发展。滑坡孕育过程中,坡度所起的作用随其大小而变化,不同坡度区间,相同规模的滑坡,随坡度大小而变化。  相似文献   

曼氏无针乌贼幼体生态因子耐受性的研究     

尹飞  王春琳  宋微微 《广东海洋大学学报》2005,25(4):39-43

研究了温度、盐度、pH值的变化对曼氏无针乌贼幼体成活率和活力的影响。结果表明，曼氏无针乌贼幼体的生存盐度为11．73～31．43，适宜盐度为19．61～26．18；生存水温为14～30℃，适宜水温为22～28℃；生存pH值为6．0～9．5，适宜pH值为7．5～8．5。说明环境因子变化对幼体存活有较大影响。乌贼幼体对渐变的适应性强，幼体成活率渐变大于突变，但温、盐度的耐受值宽度并未增大。  相似文献   

Selection of diet for culture of juvenile silver pomfret, Pampus argenteus   总被引：2，自引：0，他引：2  

彭士明  施兆鸿  尹飞  孙鹏  王建钢 《中国海洋湖沼学报》2012,30(2):231-236

Juvenile silver pomfret, Pampus argenteus, was grown in culture tanks for 9 weeks on four different diets, and their effects on fish growth, digestive enzyme activity, and body composition were assessed. The feeding regime was as follows: Diet 1: fish meat; Diet 2: fish meat+artificial feed; Diet 3: fish meat+artificial feed+Agamaki clam meat; Diet 4: fish meat+artificial feed+Agamaki clam+copepods. The greatest weight gain was associated with Diet 4, while the lowest weight gain was associated with Diet 1. No significant difference was observed in weight gain between fish receiving Diet 2 and Diet 3. Specific growth rate followed similar trends as weight gain. The feed conversion ratio (FCR) of fish fed Diet 1 was significantly higher than the other fish groups, but no significant differences were observed in FCRs of fish fed Diet 2, Diet 3 or Diet 4. There was also no significant difference in the hepatosomatic index (HSI) between the four diets. For fish that received Diets 2-4, containing artificial feed, higher protease activities were detected. A higher lipid content of the experimental diets also significantly increased lipase activities and body lipid content. No significant differences in amylase activity or body protein content were found between Diets 1-4. In conclusion, a variety of food components, including copepods and artificial feed, in the diet of silver pomfret significantly increased digestive enzyme activity and could improve growth performance.  相似文献   

海水盐度对紫血蛤耗氧率和排氨率的影响     

唐保军  尹飞  归从时 《台湾海峡》2012,31(1):89-94

在实验室条件下采用静水法测定了海水盐度(16、20、24、28、32、36、40、44)对紫血蛤(Sanguin-olaria violacea)耗氧率和排氨率的影响.紫血蛤按壳长分为大(50 mm以上)、中(40～50 mm)、小(小于40 mm)三种规格.结果显示,在盐度16～36范围内紫血蛤单位体重耗氧率和排氨率均随盐度升高显著增加(p<0.01),在盐度为36取得最大值,三种规格紫血蛤的耗氧率最大值分别为1.11、1.25和1.57 mg/(g.h),排氨率最大值分别为62.34、83.89和104.68μg/(g.h);其后随盐度上升,耗氧率和排氨率显著降低,表明在一定范围内,紫血蛤可通过调整生理代谢水平适应低盐或高盐环境.养殖驯化7 d后的累计死亡率以盐度44组为最高(55%),表明44可能是紫血蛤的耐盐上限.在盐度16～36范围内,紫血蛤单位体重耗氧率、排氨率和组织干重之间的关系可用幂函数表示.  相似文献