从线粒体细胞色素b探讨长臀ba属三个种分类与进化的关系

细尾长臀ba与月斑长臀ba、长臀ba间存在遗传分化,分化程度与鲤科其它鱼类相似;而月斑长臀ba和长臀ba却无法分开。结果提示,月斑长臀ba和长臀ba很可能为同一个种。此外,长臀ba属与云南倒刺ba的亲缘关系较近,表明有争议的长臀ba属归入ba亚科是合理的。

鱼类线粒体DNA的遗传与进化

国家自然科学基金(项目编号:39870123)

Results of drift card experiments and considerations on the movement of milkfish eggs and larvae in the northern Sulu Sea

For a period of one year beginning December 1977, drift card experiments were conducted off the western and southern coasts of Panay Island to determine the surface currents in the area. Of a total 2,384 drift cards released during the study, 382 (16.02%) were recovered, 92% of them within 30 days following dispatch. The surface currents in the study area are strongly influenced, in direction and speed, by the prevailing monsoon winds. During the NE monsoon period, the surface currents move away from the coast; during the SW monsoon, toward and/or parallel to the coast. Based on the results, the probable movement and transport of milkfish (Chanos chanos) eggs and larvae from the spawning ground to the fry collection ground are also discussed.

Impact of plankton structure on primary productivity in two beels of West Bengal, India

Planktonic community in floodplain wetlands embodies the energy transfer through this phase and indicates trophic status of lake. Originally rich bottom coupled with a conducive physicochemical environment encourages fast colonization of the plankton population. Present investigation was carried out in two floodplain wetlands having characteristics of open (Amda beel) and closed (Suguna beel) system. The physicochemical parameters of water and soil of the investigated heels were by and large conducive for planktonic growth. The density of plankton population varied between 1,346 and 2,170 u/l in Suguna bed whereas in Amda beel it ranged from 1,030 to 1,802 u/l. Seasonal fluctuations in water column were conspicuous and mostly dependent on the replenished resources and volume, A mixed and balanced population of diversified fauna constituted the plankton population of the investigated ecosystems. Mostly the diversity was observed to be maximum during winter seasons with coincidence of favorable temperature, dissolved oxygen and other physico-chemical parameters of water besides optimum solar penetration. Richness of planktonic structure in closed system (Suguna) resulted in higher fish production (1,570,05 kg/ha/yr) than that of open system (Amda) (384.4 kg/ha/yr).

中国西南部武陵山地区泥蜂总科种的记述(膜翅目:泥蜂总科)

西南武陵山地区的泥蜂,周勤、吴燕如1993年已报道了15种。该文对湘、黔、川、鄂等武陵山地区泥蜂标本进行整理鉴定,发现了7科11属31种,其中19种为中国新记录。

大鼠眶额叶皮质受损破坏新异性探索行为

利用旷场测试和Y-迷宫测试两种行为模型检测了双侧眶额叶(orbitofrontal cortex,OFC)电损伤或假损伤雄性SD大鼠的新异性探索行为,探讨YOFC在大鼠探索新异环境中的作用.旷场测试的结果发现,OFC损伤大鼠的行走距离和直立次数较假损组有明显降低;同时,在Y-迷宫测试中与假损伤组大鼠相比,OFC损伤大鼠在新异臂的访问时间和穿梭次数明显降低.提示眶额叶皮质在大鼠新异性探索行为中起着重要作用.

Population diversity studies of pharaoh cuttlefish (Sepia pharaonis) in the Persian Gulf and the Gulf of Oman

The pharaoh Cuttlefish (Sepia Pharaonis) is the most abundant species in the persian gulf and oman sea. The stock patterns of this species was studied conserning biological, morphological and electrophoretical aspects. In addition to measuring the biological patterns; 21 quantitative and qualitative factors were measured or counted. There tissues namely muscle, eye and liver were also used for further polyacrylamide electrophoresis analysis (SDS-Page method). The densitograms of protein bands of each tissue were prepared by Gel-Scanner and also the amount of bands' areas were estimated. The results of LSD test showed that tentacle length (TL), Tentacle club length (TCL) and TCL were indicative factors which they showed significant difference between male TL and female specimen of Bushehr and Balouchestan regions. Regarding to length and weight frequencies data the results indicated that males are always bigger than females and also, the cuttlefishes of the gulf of oman are bigger than persian gulf's samples. There were found a significant sample correlation (95%) between different quantitative parameters and the most correlation (0.963) was found to be between TL and TCL; whereas the less correlation (0.384) was observed between GL and LA3. However the gill length factor illustrated the less correlation with the other factors. The results of Cluster analysis for both sexes showed that the cuttlefishes of both studied regions belongs to seperate stocks. The electrophoretic experiments of proteins showed that the protein bands of the sample tissue of muscle and eye from both sampling areas revealed significant differences; whereas the tissue of liver wasn't recognized as an indicative tissue for population studies. Taking into consideration the findings of the present study including: (1) difference in spawning season, (2) results of dendrograms, (3) observed Significant differences in one-way analysis of variance (ANOVA) for morphometric measurements, (4) differences in body length and weight, (5) ecological variations of the persian gulf and oman sea, (6) as well as the results of electrophoresis of proteins have indicatend that: "The Pharaoh cuttlefishes of Bushehr and Balouchestan waters belong to two seperate stocks. Also, it is believed that each region has propably two different populations and more studies are needed to approve this result.

“ 烙铁头属蛇毒结构与功能研究”荣获年度云南省科学技术奖自然科学类二等奖

由中国科学院昆明动物研究所熊郁良研究员主持研究的“烙铁头属蛇毒结构与功能研究”荣获2004 年度云南省科学技术奖(自然科学类)二等奖。该项目利用我省丰富的烙铁头属蛇毒资源条件,从1985 年开始,在中国科学院和云南省多项基金资助下,重点对烙铁头蛇毒血小板活化素TMVA,与血栓、冠心 病相关的纤溶组分、激活纤溶组分、凝血酶样酶和止血组分、L-氨基酸氧化酶、去整合素、磷脂酶A等