Aggregation behavior of juvenile Neptunea cumingii and eff ects on seed production

作者：YU Zhenglin,HU Zhi,SONG Hao,XU Tao,YANG Meijie,ZHOU Cong,ZHANG Tao

摘要：Neptunea cumingii is an important nutrition-rich economic species in China.Juveniles of N.cumingii suff er from high mortality at low temperatures,which has proved a limiting factor in raising seedlings in artifi cial habitats.Previous research has shown that N.cumingii displays aggregation behavior in response to adverse environmental changes.Therefore,we determined the eff ects of temperature,food,size of juvenile snails,substratum type,and density of juvenile snails on the aggregation behavior of N.cumingii.Results show that,at a low(4°C)or a high(22°C)temperature,juvenile snails adjusted to the inhospitable environment by exhibiting increased aggregation behavior.However,their aggregation behaviors diff ered at these two temperatures.There was no signifi cant diff erence in the aggregation rate,but the typical aggregation size was larger at 4°C than at 22°C.At 10°C or 16°C,aggregation behavior of juvenile snails reduced.Aggregation increased in the satiation treatment at 10°C and 16°C.Small-sized juveniles tended to have higher aggregation rates(92.22%)and a larger typical aggregation size.More juveniles were distributed in the bottom of shaded substrata.A larger typical aggregation size or higher density signifi cantly reduced the mortality of juvenile snails at a low temperature(4°C).These results broaden our understanding of gastropod aggregation behavior and can be used to develop and improve commercial breeding strategies and resource recovery for N.cumingii.

发文机构：CAS Key Laboratory of Marine Ecology and Environmental Sciences Laboratory for Marine Ecology and Environmental Science Center for Ocean Mega-Science CAS Engineering Laboratory for Marine Ranching University of Chinese Academy of Sciences Shandong Fisheries Technology Extension Center

关键词：aggregationbehaviorNeptuneacumingiienvironmentaltemperaturesurvivalrateseedproduction

分类号： TG1[金属学及工艺—金属学]