黄蟹“和”绿蟹“的鉴别方法及两者的蜕壳死亡率

介绍了中华绒螯蟹蟹种中“黄蟹”和“绿蟹”的鉴别方法，报导了用这两种蟹种进行对照饲养试验的结果。     

锯缘青蟹亲蟹选择及培育技术

亲蟹质量及亲蟹培育是锯缘青蟹人工育苗的基础。本文就亲蟹的选择、亲蟹暂养期的环境、亲蟹的饵料及饲养条件进行了探讨。在相同的理化因子条件下,海捕亲蟹的抱卵率(62.13％)大约为养殖亲蟹抱卵率(26.67％)的2.31倍。     

Daily food intakes and optimal food concentrations for red king crab (Paralithodes camtschaticus) larvae fed Artemia nauplii under laboratory conditions

Daily food intakes, optimal feeding regimes and food concentrations for laboratory reared Paralithodes camtschaticus (Tilesius, 1815) larvae were investigated. Artemia nauplii hatched at standard conditions were used as food. Daily food intakes of zoeae I–IV at 7–8 °C comprised 11.3, 22.4, 33.2, and 41.8 nauplii individuals (ind)^?1 day^?1, respectively, taking into account that wet weight of Artemia nauplii used for the experiments constituted 0.026 mg, dry weight 0.0042 mg. Optimal initial Artemia nauplii concentrations for feeding zoeae I–IV was determined as 400–600, 600–800, 800–1000 and 1000–1200 nauplii L^?1 respectively. Recommendations on using Artemia nauplii as food for red king crab larvae were outlined on the basis of experimental results. Growth, development and survival rates of zoeae I–IV reared in recycling water system at 7–8 °C and fed Artemia nauplii according to these recommendations were described.     

长江江苏段中华绒螯蟹资源现状及保护对策初探

根据2004年7月～2006年3月间对长江江苏段靖江江段渔获中中华绒螯蟹的比例分析,结果显示:江段中中华绒螯蟹在渔获中比例的数量峰值主要集中在上半年度,以3月份为最高,达到渔获数量的1438％。重量比例峰值主要集中在05年的3月份和9月～11月份,以05年10月份最高,达27．17％,11月份次之。在04年秋季至05年冬季间,05年渔获中中华绒螯蟹的数量比例和重量比例部比04年同季节的值要高,江段中华绒螯蟹资源正处于恢复阶段。     

对虾、青蟹、江篱混养试验研究

本试验研究改良了池塘水质环境,预防了疾病的发生和避免了虾蟹相残,使以虾为主的虾、蟹、藻混养试验池与对虾单养对照池的对虾成活率大体接近,实现亩均综合产量222.05kg,亩均产值6985.13元,亩均盈利2472.61元,是一种高产、优质、高效的多元化养殖模式。     

中华绒螯蟹副性征的研究

在解剖、测量性成熟和未成熟中华绒螯蟹外部形态和性腺之基础上,试用“双百分率法”和“差异显著性检测法”对中华绒螯蟹的副性征进行了研究。结果表明,性成熟后的雌、雄中华绒螯蟹均具有较明显的副性征。     

Effects of diet and sediment type on survival, growth and moulting of juvenile tiger crab, Orithyia sinica L.

This study investigated the effects of different types of diet and sediment on the growth parameters of juvenile tiger crab Orithyia sinica under laboratory conditions, focusing on survival, growth and moulting. In the first set of experiments, juvenile tiger crabs were reared with five different types of sediment, i.e., soft sand, coarse sand, soft sand mixed with coarse sand, mud or bare bottom. Soft sand resulted in not only the highest survival rate of 78% but also the best rate of growth and feed intake. Crabs reared with a mud substrate showed the worst results in these parameters. The intermoult period, however, was not affected by sediment types. In the second set of experiments, crabs were fed different types of diet to determine their effects on the same growth parameters. Diets were composed of different combinations with Manila clam (Ruditapes philippinarum), brine shrimp (Artemia nauplii), microencapsulated feeds and marine diatom (Chaetoceros gracilis). Survival and growth in crabs fed Manila clam as a diet component were significantly higher than in those on other diets. The highest survival and growth were achieved with a diet that included all four components. These results provide valuable information on the appropriate bottom substrates and diet types necessary for artificial mass culture of the tiger crab.     

攀枝花烟区烤烟小苗育苗技术研究

[目的]为研究出适合攀枝花烟区的烤烟小苗移栽育苗方式.[方法]试验采取随机区组设计,开展不同漂盘和不同苗龄两因素试验.[结果]小苗育苗方式降低育苗成本76.6％;45 d的苗龄是最佳的小苗育苗苗龄;595穴/盘的漂盘规格最能提高育苗效率;不剪叶的小苗育苗方式极大地降低了烟株病害发生率：小苗育苗方式生产效益明显高于常规漂浮育苗方式.[结论]结合贵州、云南等地小苗移栽技术和攀枝花烟区的实际情况,总结出攀枝花烟区烤烟小苗移栽育苗方式,为小苗膜下栽培提供育苗方法,同时也是进一步寻求降低育苗成本、减少环境破坏、减少病害发生率、提高烟叶生产效益的新方法.