今年夏天持续高温,导致罗非鱼的产卵量下降了40%左右。广州一负责人称,当水温低于26℃或超过32℃罗非鱼就不产卵了。而今年从5月份开始到10月中旬,鱼塘水温一直在32℃或以上。10月下旬水温才 Sustained high temperatures this summer led to a 40% drop in the number of eggs laid in tilapia. An official in Guangzhou said that when the water temperature is below 26 ℃ or more than 32 ℃, tilapia will not spawn. This year from May until mid-October, the water temperature in fish ponds has been 32 ℃ or above. Late October water temperature only