白鱀豚的皮肤   总被引：3，自引：0，他引：3  

周开亚  李悦民 《海洋与湖沼》1981,12(6):566-572

鲸类的皮肤是适应完全水生而发生显著改变的器官之一。 在现代生存的四类淡水豚中,只有白鱀豚Lipotes vexillifer的皮肤尚未研究。(1974)报道了拉河豚Pontoporia blainvillei、亚河豚Inia geoffrensis及恒河豚Platanista gangetica的皮肤构造。但他观察的只是眼周围的皮肤,对身体其他部分的皮肤尚缺了解。为此,我们研究了白鱀豚各部分皮肤及皮下层的组织学构造。  相似文献   

Starvation on changes in growth and fatty acid composition of juvenile red swamp crawfish, Procambarus clarkii   总被引：1，自引：0，他引：1  

温小波  库夭梅  周开亚 《中国海洋湖沼学报》2007,25(1):97-105

The effect of starvation on physiological and biochemical indicators of body, muscle and hepatopancreas were investigated for juvenile red swamp crawfish (Procambarus clarkii), and the results showed the effect was obvious. In a 70-day starvation experiment, mean body weight, exuvial rate, ab- dominal muscle ratio and hepatosomatic index decreased significantly. The percentage of protein, fat, ash and moisture were also significantly affected. The protein content decreased sharply at Day 30 onward and the percentage of fat decreased rapidly from Day 50 and on. The percentages of ash and moisture started to increase significantly at Day 40 and 30 respectively. After the starvation experiment, the hepa- topancreatic total and neutral lipid content decreased slightly from 23.90% to 20.39% and 73.75% to 70.35%, while the hepatopancreatic polar lipid content increased from 23.81% to 27.32%. On the other hand, all the muscular total, neutral and polar lipid contents, and the muscular fatty acid compositions did not change significantly except for the hepatopancreatic fatty acid composition. The relative percentages of 14:0, 16:0, 16:1n-7 and 18:1n-9 were decreased by 55.17%, 11.11%, 8.5% and 6.70% from the initial values, and the relative percentages of 18:2n-6, 18:3n-3, 20:4n-6, 20:5n-3 and 22:6n-3 increased obvi- ously from 5.2%, 3.9%, 2.4%, 10.6%, and 13.7% to 7.1%, 5.0%, 2.8%, 11.5%, and 14.4% respectively. Preference of utilization of fatty acids from hepatopancreas during starvation was as follows: 14:0>16:0>16:1n-7>18:1n-9, and the conservation of highly unsaturated fatty acids was in the order of: 18:2n-6 >18:3n-3>20:4n-6>20:5n-3>22:6n-3.  相似文献   

南海与九龙江的三种海豚   总被引：9，自引：0，他引：9  

周开亚  李悦民  钱伟娟  杨光平 《海洋与湖沼》1980,11(4):306-313

我国南部沿海的齿鲸,已确切报道的仅太平洋驼海豚Sousa chinensis(Osbeck)、真海豚Delphinus delphis Linnaeus及江豚Neophocaena phocaenoides(G.Cuvier)等三种。本文报道南海的点斑原海豚Stenella frontalis(G.Cuvier)、热带真海豚Delphinus tropicalis van Bree与在福建九龙江采到的太平洋驼海豚Sousa chinensis(Osbeck)。  相似文献