Effects of Climatic Suitability on Clamworm Breeding along Jiangsu Coast of China

摘要

Data were collected by clamworm breeding and investigation and then analyzed to understand the changes in salinity and pH value caused by rainfall as well as climatic suitability along Jiangsu coast of China.The main climatic factors affecting clamworm breeding included water temperature,strong wind and heavy rainfall.The period with air temperature stable above 14 °C was suitable for clamworm breeding,and it was from early Apr.to mid-Nov.along Jiangsu coast.The period with air temperature stable above 30 °C in summer was unsuitable for clamworm breeding,and it was from mid-Jul.to late Jul.along Jiangsu coast.During the suitable period for clamworm breeding,the annual days of strong wind and those of heavy rainfall were 4.3-39.2 and 2.9-4.0 d,respectively.The effects of rainfall(or water exchange) on pH values were determined by the proportion of rainfall(or water exchange) in total pond water and the difference between their pH values.The climate along Jiangsu coast was suitable for clamworm breeding,and the climatic suitability decreased successively in Qidong,Lusi,Ganyu,Rudong,Dafeng,Sheyang,Yanweigang,and Western Liandao.Therefore,it is important to evaluate the effects of severe weather,forecast disastrous weather and formulate rational measurements for flood control and disaster relief.