Controlling feed losses by chewing in gilthead sea bream (Sparus aurata) ongrowing may improve the fish farming environmental sustainability

Ballester-Moltó, Mateo; Sánchez-Jérez, Pablo; García‐García, Benjamín; García-García, José María; Cerezo-Valverde, Jesús; Aguado‐Giménez, Felipe

doi:10.1016/j.aquaculture.2016.06.018

Cited by 16 publications

(29 citation statements)

References 47 publications

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“…The foreground data were collected from confidential surveys and visits to relevant companies located mainly on the coast of the province of Murcia (autonomous community of the region of Murcia, SE Spain). We visited suppliers of infrastructures for this type of facility and feed manufactures and also used information available from the Fisheries and Aquaculture Service of the Region of Murcia, and data obtained from the specialized literature [8,25,[36][37][38][39][40]].…”

Section: Data Collection and Life Cycle Inventorymentioning

confidence: 99%

“…Multiple regression analysis (MRA) is a useful technique for developing predictive equations that estimate a dependent variable based on two or more independent variables. MRA, for instance, has been used in aquaculture to explain metabolic variables, such as oxygen consumption [16,17] or the production of ammonia [18]; crop factors, such as growth and feeding rates [19][20][21][22][23][24]; or loss of feed by mastication of seabream on fish farms [25]. MRA has also been very useful for the development of econometric equations in different aquaculture systems [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Garcı́a¹,

Jiménez

Aguado‐Giménez³

et al. 2019

Sustainability

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Equations were developed through multiple regression analysis (MRA) to explain the variability of potential environmental impacts (PEIs) estimated by life cycle assessment (LCA). The case studied refers to the production of seabass in basic offshore fish farms. Contribution analysis showed that the components of the system which most influence the potential environmental impacts are the feed (54% of the overall impact) and the fuel consumed by vessels operating in the farm (23%). Feed and fuel varied widely from one fish farm to another due to different factors, such as the efficiency of the feeding system used in each of them, or the distance from the harbor to the farm. Therefore, a number of scenarios (13) were simulated with different values of both factors and the results of the PEI were fitted by MRA to the model: PEI = a + b × Feed + c × Fuel. For all the PEIs, the regression coefficients were significant (p < 0.05) and R2 was 1. These equations allow us to estimate simply and quickly very different scenarios that reflect the reality of different farms at the present time, but also future scenarios based on the implementation of technologies that will decrease both feed and fuel consumption.

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Section: Data Collection and Life Cycle Inventorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Garcı́a¹,

Jiménez

Aguado‐Giménez³

et al. 2019

Sustainability

View full text Add to dashboard Cite

show abstract

“…On the other hand, seabream, unlike seabass or Atlantic salmon, chew the feed before swallowing it, and this behavior generates waste in the form of pellet fragments, which is related to their size, and can represent as much as 8.45% of the feed during the whole ongrowing cycle [68]. As the authors indicate, these losses can be minimized with a proper food supply protocol, taking into account the size of the pellet and the size of the fish, and thus, have a significant economic impact on the fish farm [69].…”

Section: Alternative 1: Fcr Sensitivity Analysismentioning

confidence: 99%

Life Cycle Assessment of Gilthead Seabream (Sparus aurata) Production in Offshore Fish Farms

Garcı́a¹,

Jiménez

Aguado‐Giménez

et al. 2016

Sustainability

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Abstract:Life cycle assessment is used in this study to evaluate the potential environmental impacts of producing gilthead seabream in an offshore sea farm exposed to storms in the Spanish Mediterranean Sea. The farming methods used can be considered as "basic" since no centralized or automatic food distribution system exists and there is no control system. This study aims to identify the main hotspots under these conditions and to propose and compare viable alternatives to them. Contribution analysis found that the component of the system with the greatest potential environmental impact (48% of the overall impact) was fish feed, especially the raw material used. Other contributory factors were the fuel consumed by the vessels operating in the farm (35%), the dumping of N and P in the environment due to the metabolism of the fish (12%), the cages and their anchorage system (5%). A sensitivity analysis showed that a significant reduction in potential environmental impact can be achieved by increasing feeding efficiency. Feed formulation in raw materials is also an important factor and could serve to diminish overall adverse effects. A balance needs to be found between productive performance (growth, survival and feed conversion rate), feed price and its influence on production costs and the overall environmental consequences.

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“…Treatment levels and initial conditions are summarized in Table 1. T1 and T2 fish were fed with the same regime of pellet sizes, according to the recommendations taken from [28]: 2 mm pellet until fish reached 0.1 kg in weight, and 4 mm pellets from then to the end of the assay, but the feeding rate in T1 was twice as fast as in T2 (ca. 20 and 10 g min −1 , respectively).…”

Section: Experimental Conditions and Proceduresmentioning

confidence: 99%

“…In addition, seabream display a particular eating behaviour characterized by playing/tasting and chewing the feed pellets before swallowing them [26], which generates a considerable amount of wasted feed in the form of pellet fragments [27]. The amount of feed wasted by seabream was directly related to the pellet size and the fish size [28]. This way of wasting the feed is related to feed availability and feeding strategy [22], and therefore with the level of competition and satiety.…”

Section: Introductionmentioning

confidence: 99%

Effect of Feed Delivery Rate and Pellet Size on Rearing Performance, Feed Wastage and Economic Profitability in Gilthead Seabream (Sparus Aurata) Ongrowing

Aguado‐Giménez

2020

Water

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Gilthead seabream (Sparus aurata) displays a particular eating behaviour that involves considerable oral manipulation and feed waste. We assess the influence of feed delivery rate and pellet size on seabream growth and size variability, feed wastage and economic profitability for a full production cycle. Batches of seabream were fed twice a day according to three different treatments (T1, T2, T3). T1 and T2 fish were fed with the same regime of pellet sizes: 2 mm pellets until the fish reached 0.1 kg, and 4 mm pellets from then on; the feeding rate in T1 was twice that of T2 (20 and 10 g min−1, respectively). T3 fish were fed with pellets of 2 mm until they reached 0.07 kg, with pellets of 4 mm until the fish reached 0.22 kg, and with 6 mm pellets from then on, with a feeding rate of 10 g min−1. T2 showed increased growth, low variability in fish size during the ongrowing and at harvest, less feed wastage both related to the delivery and the chewing behaviour, lower feed costs and improved profitability. Seabream wasted more feed during the second meal. Controlling the feeding process is essential to reduce wastage and increase profitability, which can be achieved by process monitoring and suitable feed pellet management.

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Controlling feed losses by chewing in gilthead sea bream (Sparus aurata) ongrowing may improve the fish farming environmental sustainability

Cited by 16 publications

References 47 publications

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Life Cycle Assessment of Gilthead Seabream (Sparus aurata) Production in Offshore Fish Farms

Effect of Feed Delivery Rate and Pellet Size on Rearing Performance, Feed Wastage and Economic Profitability in Gilthead Seabream (Sparus Aurata) Ongrowing

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