颗粒人工饲料育对小蚕生长发育的影响

本文探讨了颗粒人工饲料育的饲养方法和饲育环境对小蚕生长发育的影响，结果表明：1－2龄最适给饵量为50mg/头，适宜饲养密度为1.5头／cm^2，增加给饵次数有利于小蚕的生长发育，温度和光照对小蚕的生长发育有显著的影响，以29－30℃黑暗饲育成绩最好。     

大连地区苗圃外来恶性杂草的防治措施

介绍大连地区2种主要外来入侵杂草发生情况、植物学特征及防治措施,为林业安全生产提供基础性参考意见。     

斜纹夜蛾的人工饲养技术

介绍了斜纹夜蛾的人工饲养技术,结果表明:室内饲养的斜纹夜蛾平均蛹重达473 mg,幼虫成活率、羽化率均在95%以上。该饲养方法可用于室内大量饲养斜纹夜蛾,但为减少霉菌的污染,应在人工饲料中加入适量的甲醛。     

棉铃虫齿唇姬蜂研究概况

棉铃虫齿唇姬蜂是棉铃虫的主要寄生性天敌。综述了其生物学特性、大量饲养及田间控害作用、寄主选择行为、与植物的关系、多分DNA病毒以及植物次生物质和农药对棉铃虫齿唇姬蜂的影响等,以期为该蜂的保护利用提供参考。     

Observations of flow patterns in a model of a marine fish larvae rearing tank

There are few studies on flow fields generated by aerators in fish larvae rearing tanks. The flow varies with aeration rates and tank proportions resulting in different larvae survival rates. The effects of aeration rate and aspect ratio AR (the ratio of liquid depth to tank radius) on overall flow patterns were investigated experimentally using flow visualization techniques. Two distinct types of flow patterns, a single-pair vortex system and a two-pair vortex system, were observed as the value of tank aspect ratio varied from about 1.0 to 2.0. In addition, corner vortex structures were observed in both the region between the free surface and the upper sidewall, and between the bottom wall and the lower sidewall of the tank. On the sidewall, reattachment and separation points were found, which were closely related with these vortex structures.     

春蚕5龄立体条桑一日两回育研究

针对农村养蚕房屋紧、投入成本高、效益低的实际情况,在春蚕期进行了5龄立体条桑一日两回育研究,结果表明立体条桑育具有节省养蚕用房、生产用具简单、用桑量少、蚕茧产质量高于对照区等优点。     

不同饲养方式对肉鸡肌纤维组织学特性及肌肉嫩度影响的研究

[目的]研究了不同饲养方式对河田鸡肌纤维组织学特性及肌肉嫩度的影响,为肉鸡品质调控提供理论依据。[方法]研究户外散养、室内平养、室内笼养3种饲养方式对不同日龄河田鸡腿肌和胸肌肌纤维组织学特性的影响及其与肌肉嫩度的关系。[结果]结果表明,户外散养鸡的胸肌和腿肌肌纤维直径和肌肉剪切力显著大于笼养鸡（P〈0．05）,而肌纤维密度显著低于笼养鸡（P〈0．05）。随着日龄的增加,肌纤维的直径和肌肉剪切力显著增加,而肌纤维密度显著下降。公鸡的肌纤维直径和剪切力大于母鸡。相关性分析表明,胸肌肌肉剪切力与肌纤维直径呈显著正相关（P〈0．05）,而与肌纤维密度呈负相关（P〈0．05）;腿肌肌肉剪切力与肌纤维直径和密度关系不显著（P〉0．05）。[结论]饲养方式对肉鸡肌纤维的组织学特性有显著影响,户外散养促进肉鸡肌纤维发育,相应增加了肌肉剪切力。     

The rearing of common dentex Dentex dentex (L.) During the hatchery and on-growing phases

In the current paper we present the rearing methodology of common dentex (Dentex dentex), a promising candidate for Mediterranean marine aquaculture, from the larval to the on-growing phase. The results are discussed in terms of the efficiency of rearing methodology followed, for the mass production of the species.