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1.prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses.
有生殖力的南美洲水生野草，有类似草的叶子和白色穗状花序；大量漂浮阻塞水道。收藏指正
2.Crab,reproduced in man-made brackish water,camouflaged by aquatic weed,fed on meal made of crayfish and fresh fish and maintained in qualified water,are cultured seperataly from megalopa to Ⅲ-stage larval in cage,cement pool and pond.The results show that the larval surviral rate are 75%(cage),86%(cement pool) and 40.5%(pond) respectively.
利用网箱、水泥池和池塘分别培育人工半咸水繁殖的河蟹大眼幼体至Ⅲ期仔蟹，以水草为隐蔽物，新鲜鱼、虾等肉糜为主要食物，保持良好水质；采取上述技术措施，网箱内培育的仔蟹成活率为75％、水泥池达86％、池塘为40.5％。收藏指正
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