The vitality of wasp declines as the number of generations of artificial breeding increases, Fin…
文末，对人工繁殖的玉米螟长距茧蜂生活力较低的原因也进行了分析讨论。
These results would be of help for the artificial breeding and population conservation for the Macropus.
这一研究结果对大袋鼠的人工繁育和种群保护有一定的指导意义。
This paper report, on some important problems about the artificial breeding of Macrocentrus linearis (Nees).
文本报道了人工繁殖玉米螟长距茧蜂的几个重要问题。
The research of foraging behavior ecology has a great significance in animal protection and artificial breeding.
非人灵长类动物觅食行为生态学的研究对动物保护、人工驯养和繁殖具有重要意义。
This paper sums up and discusses the progress in study on eel species, distribution, spawning grounds and artificial breeding and so on.
文中总结了鳗鲡的生活史、种类、分布、产卵地、人工育苗技术的研究情况，并分别进行了讨论。
We can see its family tree - and its daddy was a virus that evolved in the artificial breeding ground of a vast factory farm in North Carolina.
我们能看到这个病毒的谱系，它的上代病毒是北卡罗莱纳州一个大型集约化动物农场的人工繁殖基地中演化出来的一个病毒。
The above results provide basic information for the biochemical genetic survey of bighead carp populations and artificial breeding of bighead carp.
上述结果可为鳙鱼种群的生化遗传结构分析以及鳙鱼的人工育种提供基础资料。
The results showed that main factors were artificial breeding skill, cost, ration and feeding skill, labor difficulty, live beef market, butcher skill, etc.
调查结果表明，主要的影响因素有：人工授精技术、推广经费问题、饲料与饲养管理技术、肉牛销售与市场、肉牛屠宰加工技术等等。
This paper summarized the research status of the reproductive biology and artificial breeding of this species and expatiated on the future of its breeding and f...
本文根据近年来国内外对银鲳生物学以及育苗等方面的研究内容，归纳了银鲳繁殖生物学及人工繁育技术研究的现状，并提出了今后研究的重点。
The results promote the studies of isolating somatic cells and protoplasts as well as the popularization of indoor artificial breeding technology of somatic cells .
研究结果为海藻细胞及原生质体分离研究及海藻体细胞育苗的推广应用打下了良好的基础。
The centre is part of the Chengdu Research Base which holds around 108 bears in captivity, making for the largest artificial breeding population of pandas in the world.
该基地隶属于成都研究基地，成都研究基地拥有圈养大熊猫108只，是世界上最大的大熊猫人工繁育中心。
This research is a development for the artificial reproductive technique of the Chinese Alligator, and will supply a reference data for the construction of its artificial breeding field.
本研究拓展了扬子鳄的人工繁殖技术，为扬子鳄人工繁殖场地的兴建提供参考资料。
The perfect compound feed is suitable for the ingestion habits and nutritional requirements of the ragworms and suitable for the requirements of indoor artificial breeding of the ragworms.
该全价配合饲料适合岩虫的摄食习惯和营养需求，适合岩虫室内人工养殖的需要。
It provided basic technological guarantee for enlarging scope of biological control to feed artificially Sitotroga cerealella and enlarged the kinds of natural enemies by artificial breeding.
人工饲养麦蛾，扩大人工繁殖天敌的种类，为扩大生物防治范围提供基础的技术保证。
Prevention and control relies heavily on reducing the number of natural and artificial water-filled container habitats that support breeding of the mosquitoes.
预防和控制很大程度上是要减少住地那些有助蚊子滋生的自然和人为容器的数量。
Artificial selection, at the heart of breeding for desirable traits in domesticated animals, has yielded rapid change in a short span of canine history.
在育种中心对家养动物进行人工选择可以得到具有理想的外表特征的动物，在狗类短短的历史中，近期这样的动物数量迅速增加。
In this paper the techniques of its artificial training and breeding and its biological characteristics are reported.
本文报道了灰喜鹊的生物学特性和引种、驯养及人工诱导繁殖的技术。
The haploid breeding of maize is a technology that using anther culture or gynogenesis to produce haploid, and then obtain stable new varieties through natural or artificial doubling.
玉米的单倍体育种，是利用花药培养或孤雌生殖产生单倍体后，进行人工或自然加倍，迅速获得稳定的新品种的育种方法。
High oil maize and elite protein maize is the new kind of maize of artificial evolution that is produced under the maize breeding direction.
高油玉米、优质蛋白玉米，是在玉米育种学指导下产生的人工进化玉米新类型。
Goldfish breeding reproduction can be divided into two kinds natural reproduction and artificial propagation.
金鱼的繁殖，可分为两种繁殖方式，自然繁殖与人工繁殖。
The artificial fish-reef is a kind of means changing ecological environment, increasing and breeding aquatic resources near sea.
人工鱼礁是改变近海生态环境和增养殖水产资源的一种手段。
The species of the family Sciaenidae are the major fish in the artificial propagation and breeding.
石首鱼科鱼类已成为人工繁殖和育苗的主要对象。
The artificial heart is human-made - as are, it should be noted, most of our major food crops, if you count hybridization and selective breeding as being the work of humans, which they are.
而且还有一点值得注意的是，如果杂交和选择育种也算是人工劳作，那么我们大多数食物作物亦是人造的，的确如此。
The utility model is an ideal drone pupas or larvae producing tool in the present bee producing without artificial bee removing for producing royal jelly, bee bread and breeding queen bees.
是目前蜂生产中，不用人工移虫生产蜂王浆、蜂粮、培育种用蜂王，生产雄蜂蛹或幼虫的理想工具。
The frogs breeding were booming all over the country, but at present only semi-artificial and semi-wild, and there were many problems need to solve.
这也在全国范围内掀起了一股饲养蛙类的热潮，但是现阶段的饲养绝大多数是半人工半散养，而且饲养中尚存有很多问题亟待解决。
Artificial inducement of flowering is an ideal research system of cross-breeding and flowering bio-physiology for some species with bad-induced flowering, which has proved successful in 10 species.
开花人工诱导对难开花的竹子来说是杂交育种和开花生理生化研究的理想研究系统，在10个竹种中诱导成功；
The artificial induced vertical transmission of hog cholera field virus in experiment was established by breeding 2 pigs which infected with middle toxicity of hog cholera field virus.
利用2头人工感染中等毒力猪瘟野毒耐过猪进行配种，诱发了猪瘟野毒垂直传播。
The artificial induced vertical transmission of hog cholera field virus in experiment was established by breeding 2 pigs which infected with middle toxicity of hog cholera field virus.
利用2头人工感染中等毒力猪瘟野毒耐过猪进行配种，诱发了猪瘟野毒垂直传播。
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