An empirical analysis of the impact of the supply of marine factor input on the development of marine aquaculture

In the context of increasing scarcity of marine resources, scientific evaluation of the impact of marine factor input supply on the development of marine aquaculture is of great significance for guiding the allocation of marine resources. To this end, fixed capital, labor and marine resources was taken as input factors in the development of mariculture to construct a factor contribution rate calculation model based on the C-D production function. On this basis, the dynamic interactions between various input elements were further explored, using the dynamic panel vector autoregressive (PVAR) model and impulse response function. The results show that: (1) In the long run, the average contribution rates of capital, labor, and marine factor are 20.0%, 10.1%, 14.9%, respectively; (2) In the difficult period of marine aquaculture, or in the critical period of transformation and upgrading, marine factor plays a more critical role in the growth of marine aquaculture production; (3) The development of marine aquaculture applies to a strong cumulative effect, and marine factor plays a more critical role; (4) Marine aquaculture production is obviously affected by fluctuation of marine factor, but this effect is short-term, most significant in the first two years; (5) Labor factor has a long-term promotion effect on the marine factor, while capital factor has a short-term weak restraint and long-term significant promotion effect on the marine factor. The flourish of marine aquaculture industry can drive the increase of marine input in the long term.