CAJ | 학술논문

目的：探讨钉螺被人为迁移至南水北调山东受水区后其子代钉螺壳形变化特点。方法取微山湖区独山岛饲养的钉螺，以亲代钉螺107只为对照组，同时测量子1代螺115只、子2代螺107只，收集螺体壳长（L）、壳宽（W）、壳口宽（AW）、壳口长（AL）、唇脊厚度（LIT）等数据，并计数体螺旋纵肋数。结果子代钉螺LIT明显减少，并随子代数增加呈递减状态，三代螺两两比较，LIT差异有统计学意义（P<0.01）；同时，子代螺L和AL降低，W和AW增加，壳口长与宽之积增加，体螺旋纵肋数增加。结论微山湖子代钉螺的螺体变小、螺壳变薄，提示微山湖区非完全适宜钉螺孳生，但是种群可以生存多年。
목적：탐토정라피인위천이지남수북조산동수수구후기자대정라각형변화특점。방법취미산호구독산도사양적정라，이친대정라107지위대조조，동시측양자1대라115지、자2대라107지，수집라체각장（L）、각관（W）、각구관（AW）、각구장（AL）、진척후도（LIT）등수거，병계수체라선종륵수。결과자대정라LIT명현감소，병수자대수증가정체감상태，삼대라량량비교，LIT차이유통계학의의（P<0.01）；동시，자대라L화AL강저，W화AW증가，각구장여관지적증가，체라선종륵수증가。결론미산호자대정라적라체변소、라각변박，제시미산호구비완전괄의정라자생，단시충군가이생존다년。
Objective To explore the shape change characteristics of Oncomelania hupensis snail shell after the snails being passively migrated into Shandong intake area of the South-to-North Water Diversion Project. Methods The snails raised on the Dushan island in Weishan Lake region were captured,and 115 the first filial generation snails and 107 the second filial generation ones were selected. The length and width of shells and apertures,and the labial ridge thickness of those snails were measured,the longitudinal rib number of snail spiral was counted,and 107 parental snails were chosen as controls. Results The labial ridge thickness of the filial generation snail was significantly reduced with the increase of algebras,and the labial ridge thickness among the 3 generations had a significant difference(P<0.01). Both the length of snail shell and the width of snail apertures were de-creased,while the width of snail shell,the length of snail apertures,the multiplication product of snail aperture’s length and width and the longitudinal rib number of snail spiral were all increased. Conclusion The body size of Oncomelania snails in Weishan Lake region becomes smaller,and their shells become thinner,which indicates that the environment of the lake region is not suitable for snail breeding,and the snails have natural decay tendency with the extension of time.