Influence of Production Strategy on Gross Waste Output and Temporal Pattern of Gilthead Seabream (Sparus Aurata) Farming: Implications for Environmental Management

Water

Benjamín García-García¹  Mateo Ballester-Moltó²  Felipe Aguado-Giménez³ 

[1] Department of Bioeconomy, Water, and Environment, Murcian Institute for Agri-Food Research and Development, 30150 Murcia, Spain;Piscifactorías Albaladejo S.L., San Pedro del Pinatar Port, 30740 Murcia, Spain;Spanish National Research Council, National Center Spanish Institute of Oceanography, “El Bocal” Marine Aquaculture Station, Oceanographic Center of Santander, 39012 Santander, Spain;

关键词: fallowing;    modelling;    production strategy;    recovery;    Sparus aurata;    waste output;   

DOI  :  10.3390/w14050788

来源: DOAJ

【 摘 要 】

This study compares the farm management model used in the Mediterranean gilthead seabream (GHSB; Sparus aurata) industry (S1)—stepped entry of juveniles throughout the year with several production cycles and fish ages overlapping in a single farm—with that used in the salmon industry (S2)—the whole is farm filled with fish that are the same age at once with a fallowing period between rearing cycles—in terms of waste production by coupling digestibility coefficients with growth, feeding, and eating behavior models into a mass balance model. We considered the total C, N, and P content in the different waste fractions (particulate and dissolved wastes). The model, which simulated real farming conditions, showed relevant quantitative and qualitative differences between both strategies, with stocked biomass and water temperature as the main drivers, the amount of feed wasted by chewing as the most relevant fraction differentiating both strategies, and the fallowing period as the main distinguishing management feature. We discuss the influence of both farming strategies on some key performance and environmental aspects, such as benthic recovery, the breakdown of the life cycle of pathogens, and adaptability to climate change. Our results suggest that changing the GHSB industry’s production model is necessary for its sustainability.

【 授权许可】

Unknown