Abstract
Understanding how environmental factors impact the interannual variation in scallop growth and subsequently developing an easily obtained parameter to indicate this variation could provide a scientific basis for optimizing their aquaculture. In this study, we have set a growth scenario of uniformly sowed scallops of the same initial size in the Changhai sea area. The Yesso scallop culture ecosystem model was used to simulate the growth of bottom-cultured Yesso scallop each year from December 1, 2006 to November 30, 2017. The results show that the annual growth rate was higher in the northwest than in the southeast, and there were obvious high-value areas near the islands. The scallop biomass was significantly lower in 2009–2010 and reached its highest point in 2013–2014. Based on the match-mismatch conditions of bottom-water temperature, food availability, and the Yesso scallop growth process, three factors were determined: suitable growth days (SGD), restricted growth days (RGD), and food accumulation (FA). Subsequently, a multiple regression relationship was proposed with scallop biomass to explore the reasons affecting the interannual variations in scallop growth. We found that the anomaly of the contribution of SGD and FA for the scallop growth was small, and the interannual variation in scallop biomass was mainly regulated by RGD in winter. Our results indicated that the interannual variation in RGD in winter was closely related to the regional averaged air temperature in early winter. The air temperature in early winter is easily obtained in practice. Consequently, it could be used to predict the interannual growth of bottom-cultured scallops to improve aquaculture planning and management.
Highlights
The Yesso scallop (Patinopecten yessoensis) is one of the most important aquaculture species in the northern parts of China (Jiang et al, 2018)
Many factors have to be considered for developing scallop aquaculture, the most important one depends on the Interannual Variation in Yesso Scallop Biomass culture system (Aura et al, 2016)
Under the premise of uniform seeding with scallops of the same size, the interannual variation in the growth of the scallops was simulated and analyzed by the Yesso scallop culture ecosystem (YeSCE) model in the Changhai sea area
Summary
The Yesso scallop (Patinopecten yessoensis) is one of the most important aquaculture species in the northern parts of China (Jiang et al, 2018). Temperature and food availability are environmental factors that affect the growth of the Yesso scallop (Radiarta et al, 2008; Liu et al, 2014; Aura et al, 2016; Jiang et al, 2020). The match-mismatch conditions of temperature and food availability affect the growth of organisms (Laurel et al, 2011). To obtain high production levels for the Yesso scallops, it is necessary to understand the influences of the match-mismatch conditions on the growth of scallops and the cause for the interannual variation. A better understanding of the spatial and temporal variations as well as related factors that affect the Yesso scallop growth could improve marine resource protection and management (Aura et al, 2016)
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