大额牛精液低温冷冻保存方法

本发明涉及一种大额牛精液低温冷冻保存方法，属生物技术领域。本发明利用滴冻法对大额牛精液进行冷冻保存。冷冻液的配方为卵黄15％-20％v/v、甘油3％-6％v/v、乳糖1.0M-1.5M和蔗糖1.0M-1.5M；防冻液与精液稀释比例为1∶10、稀释后的精液放置在室温下平衡1小时，再转移到4℃冰箱中平衡3小时；冷冻精液的品质判定指标为：解冻复速率不低于70％；精子体外存活时间在解冻后放入37℃、5％CO2培养箱中进行培养1小时后，运动度不小于30％；金黄地鼠裸卵穿透率不低于38％；精液在50mOsm/kg的低渗溶液中，38℃的5％CO2培养相中培养1小时，精子肿胀率不低于39％。本发明具有实用且效果可靠，提供的大额牛冷冻精液品质的评定方法和判定指标科学、规范等优点。

A method of immersion of panels for ecological studies on marine fouling and boring organisms

The importance of studies on the biology of marine foulers and borers needs no emphasis since they cause damage to submerged wooden structures resulting in considerable economic loss. In order to study their occurrence, settlement and to assess the rate of destruction to timber, several immersion techniques using iron racks, cages and rafts have been adopted. On the east and west coasts of India, at the Marine Centres of Forest Research Institute (Waltair, Madras, Cohin and Bombay) investigations have so far been carried out employing the first two methods.

Effect of butachlor on spermatogenesis, testosterone amount and testes tissue Rutilus frisii kutum Kamenskii 1901

Morphological assessment of sexually mature Rutilus frisii kutum Kamenskii 1901 caught from the rivers (Shirud, Khoshkrud, Sepidrud and Chelavand Rivers) flowing in the southwest Caspian Sea region was conducted and sperm volume, total sperm count and sperm concentration of abnormal sperms were determined after exposing the spawners to 60% herbicide butachlor (machete). Spawners under study were maintained in tanks (1000 l) at the Shahid Ansari Teleost Fish Hatchery and exposed to two different concentrations (25% and 75% of its LC50 value) of butachlor. Results obtained indicate that exposure to high butachlor toxicity (75% of its LC50 value) decreased sperm volume to 0.61 ± 0.42 cc in 2-3 year old fishes and to 0.55 ± 0.42 cc in fishes above 3 years of age, while that in fish exposed to low butachlor toxicity (25% of its LC50 value) decreased to 1.55 ± 0.42 cc in 2-3 year old fishes and to 1.28 ± 0.42 cc in fishes above 3 years of age. The sperm volume under normal conditions in R. frisii kutum is 4.6 ± 0.42 cc in 2-3 year olds and 4.58 ± 0.42 cc in fishes above 3 years of age. The total sperm count in R. frisii kutum is 39.74 ± 2.5 billion spermatozoa/cc in 2-3 year olds and 42.99 ± 2.5 billion spermatozoa/cc in fishes above 3 years of age. When exposed to high butachlor toxicity, total sperm count dropped to 16.92 ± 2.5 billion spermatozoa/cc in 2-3 year olds and to 15.98 ± 2.5 billion spermatozoa/cc in fishes above 3 years of age. Similarly total sperm count in R. frisii kutum exposed to low butachlor toxicity was recorded as 23.6 ± 2.5 billion spermatozoa/cc in 2-3 year olds and 29.4 ± 2.5 billion spermatozoa/cc in fishes above 3 years of age. Under normal conditions, on the basis of morphology, spermatozoa showed only 10 ± 1.92% of abnormal sperms. The number of abnormal sperms increased by 28.6 ± 1.92% in fishes exposed to high butachlor toxicity, while that in fishes exposed to low butachlor toxicity increased by 19.7 ± 1.92% in 2-3 year olds and 16.6 ± 19.2% in fishes above 3 years of age. It is evident from the results obtained that increase in level of pollution caused a decrease in sperm volume but an increase in the percentage of abnormal sperms. Results obtained indicate that exposure to high butachlor toxicity (75% of its LC50 value) decreased testostron hormone to 0.31 ± 0.22 ng/ml in high butachlor toxicity, and to 0.45 ± 0.22 ng/ml in low butachlor toxicity (25% of its LC50 value). Testostron hormone dropped to 0.53 ± 0.22 ng/ml in 2-3 year olds and to 0.79 ± 0.22ng/ in fishes above 3 years of age. The testostron hormone under normal conditions in R. frisii kutum is 2.7 ± 0.22 ng/ml. It is evident from the results obtained that increase in level of pollution caused a decrease in testostron hormone

抚仙湖生态环境中无尾两栖动物的资源与利用

2008年3～7月对云南抚仙湖生态环境中的无尾两栖类资源进行了调查.结果表明:有无尾两栖类10个种,隶属于1目4科7属,但是分布狭窄,部分种类数量少.结合无尾两栖类的生态功能和作为指示生物的优越性特点,提出了加强其生活环境和物种多样性保护以及合理利用无尾两栖类动物对抚仙湖生态环境进行监测的建议.

Growth rates of Tilapia esculenta (Graham) and Tilapia zillii (Gervais) under cultivation in ponds at Nyegezi, Tanzania

Aquaculture in Tanzania is still on a subsistence level and most of the ponds are maintained as part time job. The ponds are too small, shallow and over crowded with stunted Tilapia spp. In the present paper the results of experiments conducted in ponds at Nyegezi with T. esculenta and T. zillii are presented. This was part of an overall project of developing techniques of fish cultures with Tilapia under the limited existing conditions at Nyegezi. In a mono - species culture experiement with Tilapia zillii in nine month's time an average size of 172.8 mm/115.0 g was attained. In another experiment with T. zillii and T. esculenta in thirteen month's time, T. zillii attained an average size of 180.2mm/106.6 g and T. esculenta 193.6 mm/118.8 g. In another experiment with intensive feeding schedule an average size of 179.3 mm/126.6 g was attained by T. zillii and 191.0 mm/125.0 g by T. esculenta in four month's time. A locally prepared supplimentary feed with local Brewery Waste and Fish Meal (10:1) was readily accepted by both species of Tilapia. T. zillii voraciously fed on Cabbage leaves, Cauliflower leaves, Chinese cabbage leaves, Cassava leaves and on the common weed Comalina sp. Though all the items mentioned above were readily accepted by T. zillii feeding with Comaltna sp. was the easiest and most convenient because of its availability. In an intensive feeding experiment with vegetable leaves/Comalina sp. and the locally prepared supplimentary feed the fishes attained table size in four months time. Cement cistens of 5 X 3 X 1½ m size could be conveniently used for breeding both species of Tilapia. T. zillii had semi adhesive eggs and they were deposited on the sides of the cement wall. The number of young ones in a brood ranged from 160 to 314 in T. esculenta and 687 to 4,356 in T. zillii.

黑叶猴(Presbytis francoisi)和菲氏叶猴(P.phayrei)四肢肌的主要特征

黑叶猴和菲氏叶猴的上肢肌和下腩肌系统解剖结果表明, 大部分与猴超科的 共同特征相一致, 也有一些差异。通过与其他灵长类的比较对存在差异的20条 上肢肌和17条下肢肌作了描述和讨论。参14

树ju精子发生的季节性变化

野生成体树ju精小管在一年中有一个高峰值和低谷值, 高峰值出现在4月, 低峰值出现在10 月; 1、4月份的生精上皮, 表现了高度活跃的精子发生, 具有 周期的12个连续阶段和典型的细胞组合, 附睾精子数量亦表现了类似的季节性波 动。图1表3参14

响蜜lie科的新记录

报道并简述了1994年10月在云南省泸水县的老窝捕获到1只响蜜lie科的黄腰响蜜lieIndicator xanthonotus 为我国鸟类科的新记录。模式标本保存于作者单位。

金不换鲜三七液对哺乳动物致突变和致畸安全性评价

以小鼠骨髓细胞染色体畸变试验、小鼠睾丸减数分裂染色体畸变及小鼠致畸试验为指标,研究金不换鲜三七液的安全性。结果:小鼠骨髓细胞染色体畸变试验;低、中、高3个剂量组小鼠骨髓细胞染色体畸变率分别为0.7%、0.2%和0.9%,与对照组相比无显著差异。阳性对照组染色体畸变率大大增高。小鼠睾丸减数分裂细胞染色体畸变:在该实验条件下,小鼠睾丸细胞染色体畸变率[包括性染色体单价体(X-YU),常染色体单价体(AU)]在各实验组和对照组之间无显著差异。小鼠致畸试验:小鼠口服金不换鲜三七液的累积剂量达15g/kg体重的1/10、1/5和1/2,小鼠致畸试验也无显著差异。