论文部分内容阅读
大鲵,俗称娃娃鱼。属有尾两栖动物的大鲵属大鲵科。可供食用、科研应用及出口外销。但此鱼尚处于野生状态,加之近来过度捕杀,很有绝种的危险。所以根据其生态习性进行人工饲养,具有重大意义。 一、大鲵的生态习性 1.栖息环境 生活在水流湍急、水质清凉、水温差较大的乱石多孔的山间溪流中。有固定的洞穴,白天很少出来,晚上爬出。用脚在水底爬进,间或浮在水中,用带浅蹼的脚划水前进,用尾掌握方向,行动缓慢。绝大部分时间在水中生活,只是在山洪暴发、水质变得非常浑浊时才爬到岸上或沙滩上生活,但最多不超过20小时。说明它还不能适应陆地生活。
Big bream, commonly known as salamander. Is a tail amphibian is a large raccoon dog. Available for food, scientific research and export applications. However, this fish is still in the wild, coupled with the recent over-kill, there is a danger of extinction. Therefore, according to their ecological habits of artificial rearing, of great significance. First, the ecological habits of the big clams 1 habitat living in turbulent water, water quality, water temperature difference between the larger rocky porous mountain stream. There are fixed caves, rarely come out during the day, climb out at night. Crawl in the water with your feet, or floating in the water, with shallow webbed feet stroke forward, with the tail to grasp the direction, slow action. Living most of the time in the water, but only in the flash floods, when the water quality becomes very muddy climb to the shore or beach life, but not more than 20 hours. That it can not adapt to land life.