Spatiotemporal Variations and Convergence Characteristics of Green Technological Progress in China’s Mariculture

Abstract

The sustainability of mariculture depends on adopting green technologies, which can mitigate the negative impacts on the environment and ensure long-term viability. However, existing studies do not comprehensively understand the characteristics and regional differences of green technology progress (GTP) in mariculture. According to data from ten coastal regions from 2008 to 2020, this study adopts the Epsilon-Based Measure (EBM)-Malmquist model to measure the GTP of mariculture, uses the Dagum Gini coefficient to analyze the spatial differences of GTP, and uses convergence models to explore the convergence of GTP. The results showed that: (1) the GTP of China’s mariculture showed a fluctuating upward trend temporally and significant spatial differences. The overall differences showed a dispersion trend over time. The contributions of inter-regional super variable net value difference (Gnb), inter-regional transvariation intensity (Gt), and intra-regional difference (Gw) were 38.813%, 31.256%, and 29.931%, respectively. (2) The degree of dispersion of GTP among different regions has not decreased with time, which means there is no apparent σ convergence. Absolute β convergence and conditional β convergence existed in GTP, and the absolute value of the latter was greater than that of the former. That is, the growth rate of GTP will first reach their respective steady-state levels and then approach a unified steady-state equilibrium level.

Study on the Spatial Imbalance and Polarization of Marine Green Aquaculture Efficiency in China

“…Specifically, the overall efficiency of marine green aquaculture in China showed a slight upward trend, which is consistent with the above measurement results. Although China's mariculture green transformation started late with the promulgation of a series of policy documents supporting the green development of marine aquaculture fisheries, coastal provinces have accelerated the pace of mariculture green transformation, constantly improving the mechanisms and regulatory system of green mariculture [50,51] by increasing technological and human capital investments and promoting research into key technologies [52,53]. After a series of technological transformations and applications, the desirable output of marine green aquaculture has been significantly improved and the non-desirable outputs have been effectively reduced, which ultimately led to the increase in marine green aquaculture efficiency.…”