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奉贤地区南临杭州湾,滩涂面积大,养虾气候条件优越。1985年全县养虾面积4400多亩,是上海地区主要对虾养殖基地。近几年来,我们观察到气候的变化对对虾生长影响很大,并时有泛塘发生,对虾损失较大。为此,我们对对虾生长与气候条件(主要是同水温和气温)的关系进行了研究,结果如下: 一、对虾体长增长与水温、气温的关系 (一)水温高低与对虾体长增长 1985年5月15日放的虾苗,放苗后最低水温17.2℃,到6月15日测定平均对虾体长3.61厘米,平均每天体长增长0.94毫米,然而对虾体长增长并不是随着水温的上升而加
Fengxian area south of Hangzhou Bay, beach area, shrimp climatic conditions are superior. In 1985 the county shrimp area of 4400 mu, is the main shrimp breeding base in Shanghai. In recent years, we have observed that the climate change has a great impact on the growth of shrimp and pan-ponds sometimes occur, with larger losses to shrimp. Therefore, we study the relationship between shrimp growth and climatic conditions (mainly the same water temperature and air temperature), the results are as follows: First, the shrimp body length growth and water temperature and air temperature (a) the water temperature and shrimp body length growth 1985 Shrimp on May 15, 2015, the lowest water temperature after Fangmiao 17.2 ℃, the average shrimp body length of 3.61 cm measured on June 15, the average daily body length increased 0.94 mm, however, shrimp body length growth is not with the water temperature Increase and increase