养殖业板块12月1日跌1.27%，温氏股份领跌，主力资金净流出1.19亿元

Group 1 - The aquaculture sector experienced a decline of 1.27% on December 1, with Wens Foodstuffs leading the drop [1] - The Shanghai Composite Index closed at 3914.01, up 0.65%, while the Shenzhen Component Index closed at 13146.72, up 1.25% [1] - Key stocks in the aquaculture sector showed varied performance, with Zhengbang Technology rising by 5.59% and Wens Foodstuffs falling by 2.99% [2] Group 2 - The net outflow of main funds in the aquaculture sector was 119 million yuan, while retail funds saw a net outflow of 40.92 million yuan [2][3] - Major stocks like Muyuan Foods and Wens Foodstuffs saw significant net outflows from main funds, indicating a shift in investor sentiment [3] - Retail investors showed a mixed response, with some stocks like Tianbang Foods attracting minor inflows while others faced outflows [3]