养殖业板块9月17日跌1.27%，天域生物领跌，主力资金净流出7.42亿元

Market Overview - The aquaculture sector experienced a decline of 1.27% on September 17, with Tianyu Biological leading the drop [1] - The Shanghai Composite Index closed at 3876.34, up 0.37%, while the Shenzhen Component Index closed at 13215.46, up 1.16% [1] Stock Performance - Key stocks in the aquaculture sector showed varied performance, with 京基智农 (Jingji Zhino) closing at 17.21, up 0.35%, and 温氏股份 (Wens Foodstuff) remaining unchanged at 19.66 [1] - Tianyu Biological (天域生物) saw a significant decline of 5.73%, closing at 9.38 [2] - Other notable declines included 牧原股份 (Muyuan Foods) down 2.02% at 56.19 and 立华股份 (Lihua Agricultural) down 1.77% at 23.80 [2] Capital Flow - The aquaculture sector experienced a net outflow of 742 million yuan from institutional investors, while retail investors saw a net inflow of 643 million yuan [2] - The table of capital flow indicates that 民和股份 (Minhe Livestock) had a net inflow of 5.90 million yuan from institutional investors, while 京基智农 (Jingji Zhino) had a net inflow of 4.58 million yuan [3]