Abstract:This work is based on an EU project which intends to conduct research work on the carrying capacity for aquaculture and environmental in two semi-enclosed and shallow bays in North China, Jiaozhou Bay and Sanggou Bay. Sanggou Bay is located at 37°01′~37°09′N, 122°2′~122°35′E with an area of about 133km~2, which is fully exploited by aquaculture activities, and 1/3 of the total surface is dedicated to the culture of kelp and shellfish. Kelp grows on ropes in the field from October to April-May. Kelp yield re...