The Influence Of Food And Temperature On Development And Reproduction Rate Of Oncomelania Hupensis

In the food of Oncomelania hupensis growth and reproduction rate related experiments, mature Oncomelania hupensis getted from the wild of keeping food in the room can normally lay their eggs, eggs on the amount is closely related to the different kinds of food. Oncomelania hupensis feeded with Cyanobacteria powder have the minimum fecundity,Oncomelania hupensis feeded with Pheretima powder have the maximum fecundity, Oncomelania hupensis feeded with Carassius auratus powder have the second fecundity.Oncomelania hupensis hupensis feeded by different food,the impact of eggs hatchability and incubation duration is not obvious. Eggs of a variety of food keeping Oncomelania hupensis of hatching rate is between70%to74%.Young Oncomelania hupensis feeded by the single cyanobacteria powder can not complete its growth and development Hupensis kept by a single feed or mixed food can be mature, mature time and aspect ratio was no significant difference. With the growth and development of newly hatched young Oncomelania hupensis, the shell dimension gradually changes from spherical to conical.Oncomelania hupensis fecundity with temperature have no visible pattern in the experiment of the temperature development and reproductionrate of Oncomelania hupensis. The temperature did not affect the hatchability of Oncomelania hupensis hupensis between15℃and30℃.Oncomelania hupensis eggs can not hatch at10℃and35℃.Within the15-30℃temperature range, incubation period gradually shortened with the increasing temperature. In10℃,35℃,the Oncomelania hupensis eggs can not hatch.In10,15,20,25,30,35℃and indoor under normal temperature conditions, the development of he newly hatched young Oncomelania hupensis is not the same, young Oncomelania hupensis are not developed and soon die in the constant temperature of10℃, young Oncomelania hupensis can not complete development in the conditions of constant temperature of15℃, young Oncomelania hupensis develop slowly and can not develop into mature Oncomelania hupensis and then all die in30and35℃constant temperature. In the process of young Oncomelania hupensis kept indoors, the shell dimension change with the growth.