Thursday, February 22, 2024
问题:每日的实际投饵量主要根据当地的()、()、()和鱼类吃食情况,即群众称为“四看”而定。...
Monday, February 19, 2024
Thursday, February 22, 2024
Monday, February 19, 2024
问题:世界上引种最多的鱼类是()、莫桑比克罗非鱼和虹鳟三种。...
Monday, February 19, 2024
问题:鱼类人工繁殖技术包括三个部分:()、()、()。...
Monday, January 22, 2024
Thursday, February 22, 2024
问题:试比较自然受精与人工授精这两种方法各自的优缺点。...
Monday, February 19, 2024
Thursday, February 22, 2024
Thursday, February 22, 2024
Thursday, February 22, 2024
Thursday, February 22, 2024
问题:由于仔鱼有限的消化能力,目前幼体的饵料仍主要以活饵料为主,主要由()、()、()和其它无脊椎动物幼体。...
Monday, January 22, 2024
Thursday, February 22, 2024
Thursday, February 22, 2024
Monday, February 19, 2024
Monday, January 22, 2024
Thursday, February 22, 2024
问题:网箱养鱼投饵“四定”原则:即()、()、()、()。...
Thursday, February 22, 2024
问题:根据鱼苗在不同发育阶段对饵料的不同要求,可将鱼苗的生长划分为4个阶段进行强化培育:()、()、()、()。...
Saturday, January 20, 2024