Bio-economic analysis of super-intensive closed shrimp farming and improvement of management plans: a case study in Japan

Abstract

Crustacean aquaculture is a multibillion-dollar industry worldwide that continues to show significant growth. Shrimp farming has been intensified for decades, and super-intensive closed culture systems have now been developed to improve productivity and reduce environmental burdens. Here, we used bio-economic approaches to investigate the mechanisms and economic productivity of shrimp farming. We used three steps: (1) path analysis by using structural equation models to determine the candidate factors associated with productivity; (2) modeling of population dynamics and profits; and (3) simulations based on the models to clarify the productive characteristics of a super-intensive closed culture system. Our findings suggest that the population dynamics of the system were limited by unidentified factors that differed from those found in many experimental studies, such as water temperature, salinity, dissolved oxygen, and nitrogenous waste. The unidentified factors were related to the number of days of rearing and cumulative biomass mortality. The production plan suggested by our simulation required frequent culture rotation to increase profits. Our case study provides important practical information about the characteristics of super-intensive shrimp farming, implications for efficient economic management, and new research subjects for the future.

Evaluating Invasive Marbled Crayfish as a Potential Livestock for Sustainable Aquaculture

“…While RAS-based production of marbled crayfish has already been described as ecologically safe (Vogt, 2021), it has also been argued that the approach might be unprofitable. However, profitable processes for RAS-based mass production of shrimps have been established and are being further optimized (Shinji et al, 2019). As chitin extraction from shell waste could provide a significant increase in revenue, we suggest that RASbased production of marbled crayfish might be a profitable and environmentally safe alternative to the current practices of P. clarkii farming in rice paddies.…”

Bioeconomic modeling of oyster farming in Miyagi Prefecture, Japan

“…Shinji, Nohara, Yagi, and Wilder (2019), who studied an indoor shrimp production system in Niigata Prefecture, Japan, represent the first instance of the application of bioeconomic modeling in Japanese aquaculture. However, no study has applied bioeconomic modeling to Japanese marine aquaculture, which is widespread in Japan.…”

“…Studies have been carried out in diverse areas of the world, including Europe (Melia & Gatto, 2005), North America (Poot-López & Gasca-Leyva, 2009;Shamshak, 2011;Shamshak & Anderson, 2009;Yu & Leung, 2009), South America (Zúñiga, 2010), Oceania (Keys et al, 2004), Southeast Asia (Petersen et al, 2013;Petersen et al, 2014), and East Asia (Choi et al, 2006). Shinji, Nohara, Yagi, and Wilder (2019), who studied an indoor shrimp production system in Niigata Prefecture, Japan, represent the first instance of the application of bioeconomic modeling in Japanese aquaculture. However, no study has applied bioeconomic modeling to Japanese marine aquaculture, which is widespread in Japan.…”

Economic analysis of intensive and super-intensive Litopenaeus vannamei shrimp production in a Biofloc Technology system

“…In this context, stocking density is an important factor to consider, since it has a direct influence on production (Jackson and Wang, 1998), and the consequent profitability of an enterprise (Almeida et al, 2021). Despite the environmental, sanitary, and economic advantages (Krummenauer et al, 2012;Rego et al, 2017a;Nguyen et al, 2019;Shinji et al, 2019;Vieira et al, 2019), implementing and operating BFT systems requires significant investment (Poersch et al, 2012). As with other economic activities, production costs in aquaculture are directly related to the profitability of the business (Di Trapani et al, 2014).…”

“…As with other economic activities, production costs in aquaculture are directly related to the profitability of the business (Di Trapani et al, 2014). Although this is an important issue, there are few studies that have examined the costs and benefits of shrimp production in BFT systems (Shinji et al, 2019).…”