目前没有对这些鸟类进行商业化养殖。
海狸鼠是由阿根廷的皮毛养殖者带来的,并被放归野外。
Nutria were brought there from Argentina by fur farmers and let go into the wild.
这也就是鱼场养殖的问题所在。
但养殖不仅仅是育种。
有些鱼类就是不适合人工养殖。
真正的养殖可以在经济上获利。
但又有显著的问题出现:养殖场的臭味。
这里鱼类养殖场的条件出乎意料地干净。
大多数的拉加利亚农户专门养殖蛋鸡。
Most Lagalia farmers specialise in chicken and egg production.
养殖北美绿头野鸭有着广阔的市场前景。
Breed mallard of North America green head to having wide market perspective.
鸡养殖者可供大规模生产的“完美”鸡。
此类成分的来源包括种植植物和养殖动物。
养殖鱼溜出养殖场后,也遭受这样的损害。
水产养殖能否真的胜任?
附近可以建水产养殖中心,喂养鱼、虾和软体动物等。
An adjacent aquaculture center could also raise fish, shrimp and mollusks.
“蚕的优势在于容易养殖,”哈亚希博士说。
"The advantage of silkworms is that they're easy to grow," Dr. Hayashi said.
保持更好养殖的记录。
中国养殖鱼产量超过了全球总产量的60%。
China produces more than sixty percent of the world's farmed fish.
畜牧水产养殖已成为湖南农村的第一大产业。
Pasturage aquiculture already made the biggest industry of Hunan country.
后来,一些人学会种植作物和养殖动物为食。
Then, some people learned to grow crops and raise animals for food.
那里的后院养殖者和农户实在太多了,”她说。
There are simply too many backyard farmers and village households," she said.
现在也有一些鱼苗孵化场可以人工养殖鱼类。
您介意吃养殖鱼吗?
您介意吃养殖鱼吗?
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