Particulate waste outflow from fish-farming cages. How much is uneaten feed?

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

doi:10.1016/j.marpolbul.2017.03.004

Cited by 56 publications

(36 citation statements)

References 58 publications

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“…Poor water quality is likely to cause co‐infections of fish diseases, leading to even higher mortalities (Busch, Dalsgaard, & Buchmann, ; Shoemaker, Maurício, Xu, & Klesius, ; Xu, Shoemaker, Zhang, & Klesius, ). Numerous studies have shown that vital factors affecting water quality were mainly related to fish feed and waste because most of the nutrients in feed were lost into the environment, thereby worsening the water quality (Amirkolaie, ; Ballester‐Moltó, Sanchez‐Jerez, Cerezo‐Valverde, & Aguado‐Giménez, ; Edwards, ; Wang et al, ; Yildiz et al, ). Consequently, it is necessary to explore some nutritional alternatives not only for the sake of growth performance, but also to improve fish feed utilization and lessen water fouling.…”

Section: Introductionmentioning

confidence: 99%

Effects of garlic powder on feeding attraction activity, growth and digestive enzyme activities of Japanese seabass, Lateolabrax japonicus

Shangguan

Huang

et al. 2020

Aquacult Nutr

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The study was to investigate the effects of garlic (Allium sativum) powder on feeding attraction activity, growth performance and digestive enzymes of juvenile Japanese seabass, Lateolabrax japonicus (initial weight: 29.82 ± 0.24 g). Six concentration gradients (0, 5, 10, 15, 20 and 25 g/kg diets) were formulated for luring and feeding experiment. The results showed a clear attractive trend of garlic powder for L. japonicus. A 28‐day feeding experiment indicated garlic could reduce the feed conversion ratio (FCR) (p < .05). The content of the body crude lipid was significantly increased at 10–15 g/kg diet (p < .05). Digestive enzyme activities including trypsin, amylase (AMS) and lipase (LPS) in the intestine were the highest at 10 g/kg diet (p < .05). Overall, garlic powder provides a promising and effective method for Japanese seabass healthy culture by improving fish growth and digestive ability. The results of this research suggested the additive suitable dosage of garlic powder was about 10 g/kg diet.

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Section: Introductionmentioning

confidence: 99%

Effects of garlic powder on feeding attraction activity, growth and digestive enzyme activities of Japanese seabass, Lateolabrax japonicus

Shangguan

Huang

et al. 2020

Aquacult Nutr

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show abstract

“…Aquaculture feed account for 50% of the total production costs with protein being the most expensive nutrient in the diet (Ballester‐Moltó, Sanchez‐Jerez, Cerezo‐Valverde, & Aguado‐Giménez, ). A major challenge for the aquaculture industry is to find new strategies for precision diet formulation that minimize rising feed cost, while implementing more sustainable farming practices that rely on enhanced feeding strategies and high‐quality diets.…”

Section: Introductionmentioning

confidence: 99%

Optimizing diets to decrease environmental impact of Nile tilapia (Oreochromis niloticus) production

Teodósio

Engrola²,

Colen³

et al. 2019

Aquacult Nutr

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Aquaculture is one of the most thriving animal production sectors, and Nile tilapia (Oreochromis niloticus) farming represents 8% of total finfish culture. However, the industry sustainability depends on the development of cost‐effective and environmental friendly feeds. This study aimed to reduce dietary protein levels in diets for juvenile tilapia and to minimize diet environmental impact while maximizing biological efficiency. A growth trial was performed using five isoenergetic plant protein‐based diets with decreasing levels of crude protein: 360, 340, 320, 300 and 280 g/kg diet (D360, D340, D320, D300 and D280, respectively). Dietary protein utilization was assessed by metabolic trials using a radiolabelled amino acid mixture. Tilapia in all treatments showed similar growth performance and feed intake. Feed conversion ratio was significantly higher in fish fed the D280 than the D360 diet, while no differences were found for other treatments. Protein retention was significantly higher in tilapia fed the D300 than the D360 diet. Amino acid catabolism increased in fish fed the D360 diet, though without significant differences in muscle amino acid retention. This study demonstrates that dietary protein levels can be reduced to 300 g/kg diet without hindering tilapia growth and feed conversion ratio, while reducing environmental nitrogen losses.

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“…Feed wastage in pisciculture is closely related to feed composition, fish feeding behaviour and feed management [52][53][54]. Also, fish feeding behaviour is strongly influenced by environmental conditions, especially by water temperature.…”

Section: Waste Productionmentioning

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

Self Cite

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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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Particulate waste outflow from fish-farming cages. How much is uneaten feed?

Cited by 56 publications

References 58 publications

Effects of garlic powder on feeding attraction activity, growth and digestive enzyme activities of Japanese seabass, Lateolabrax japonicus

Effects of garlic powder on feeding attraction activity, growth and digestive enzyme activities of Japanese seabass, Lateolabrax japonicus

Optimizing diets to decrease environmental impact of Nile tilapia (Oreochromis niloticus) production

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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