The size of biofloc determines the nutritional composition and the nitrogen recovery by aquaculture animals

Ekasari, Julie; Angela, Deasy; Waluyo, Setiyo Hadi; Bachtiar, Taufiq; Surawidjaja, Enang Harris; Bossier, Peter; Schryver, Peter De

doi:10.1016/j.aquaculture.2014.01.023

Cited by 213 publications

(164 citation statements)

References 21 publications

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“…. These results indicate that bioflocs have a greater capacity to remove ammonia from water than periphyton, as also observed by Ekasari et al (2014) and Green (2015).…”

Section: Results and Discussion Water Qualitysupporting

confidence: 79%

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Cavalcante

Lima

Rebouças

et al. 2016

Acta Sci. Anim. Sci.

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ABSTRACT. The present work aimed at determining the effects of the association between the periphyton-based system with the bioflocs-based system in the intensive culture of juvenile Nile tilapia (1.56 ± 0.07 g; 72 fish m -3 ), on variables of water quality, growth performance and effluent quality after 10 weeks. The experiment was arranged in a 2 x 2 factorial randomized block design with four treatments and five repetitions each. The factors tested were the following: 'underwater structure' (absence and presence) and 'adjustment of the C: N ratio of water' (no and yes). The final fish body weight, specific growth rate and yield were higher (p < 0.05) in the C: N-adjusted tanks. The presence of submerged structures in the tanks had no significant influence on those same variables. It was concluded that the periphyton-based system is not indicated for intensive farming of Nile tilapia, in which there is a high allowance of artificial feed to fish.Keywords: aquaculture, Oreochromis, limnoculture, limnology.Integração dos sistemas perifíton e bioflocos no cultivo intensivo de juvenis de tilápia do Nilo RESUMO. O presente trabalho teve por objetivo determinar os efeitos da integração do sistema baseado em substrato (perifíton) com o sistema baseado no ajuste da relação C: N da água (bioflocos), no cultivo intensivo de juvenis de tilápia do Nilo (1,56 ± 0,07 g; 72 peixes m -3 ), sobre variáveis de qualidade de água, desempenho zootécnico e qualidade de efluentes, após 10 semanas. O delineamento experimental utilizado foi em blocos ao acaso, em arranjo fatorial 2 x 2, com quatro tratamentos e cinco repetições cada. Os fatores em teste foram os seguintes 'estruturas submersas' (ausência e presença) e 'ajuste da relação C: N da água' (não e sim). Os resultados de peso corporal final, taxa de crescimento específico e produtividade de peixe foram maiores (p < 0,05) nos tanques nos quais se fez o ajuste da relação C: N da água, quando comparado aos tanques sem esse ajuste. A presença das estruturas submersas nos tanques não afetou de modo significativo essas mesmas variáveis. Concluiu-se que o sistema de cultivo de peixe baseado em substrato (perifíton) não é indicado para cultivos intensivos de juvenis de tilápia do Nilo, nos quais há grande entrada de alimento artificial nos tanques de cultivo.

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“…. These results indicate that bioflocs have a greater capacity to remove ammonia from water than periphyton, as also observed by Ekasari et al (2014) and Green (2015).…”

Section: Results and Discussion Water Qualitysupporting

confidence: 79%

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Cavalcante

Lima

Rebouças

et al. 2016

Acta Sci. Anim. Sci.

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“…This is confirmed by Ekasari et al (2014) who mentioned that lipid from the feed can be used as an important energy source for fish, therefore protein consumed from the feed can be optimally utilized for fish growth.…”

Section: Resultsmentioning

confidence: 69%

Growth performance of African catfish Clarias gariepinus cultured in biofloc system at high stocking density

Soedibya

Pramono

Listiowati

2017

Jurnal Akuakultur Indonesia

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This study was aimed to analyze the growth performance of African catfish Clarias gariepinus cultured in the biofloc system at high stocking density. African catfish with an average weight of 1.85±0.09 g were cultured in four units of tarpaulin tank at a diameter of 1.72 m and a height of 1.05 m with a volume of ±2,000 L at the different density of 1,000 fish/m 3 ; 1,500 fish/m 3 ; 2,000 fish/m 3 ; 2,500 fish/m 3 . During rearing period, fish were given the artificial feed with protein contents of 28.75% with the frequency of twice a day, as much as 3% of the body weight. The results showed that different treatment of high stocking density in the biofloc system had a significant effect on the absolute growth rate, lipid retention and energy retention (P<0.05) but not significant effect on daily growth rate. The results showed that the highest lipid retention and energy retention were found in the group of fish treated at a stocking density of 2,500 fish/m 3 but declining protein retention and growth in fish occurred. The highest absolute growth rate and daily growth rate were shown by treatment with a stocking density of 1,500 fish/m 3 .Keywords: growth, stocking density, biofloc ABSTRAKPenelitian ini bertujuan untuk menganalisis performa pertumbuhan ikan lele dumbo Clarias gariepinus yang dipelihara pada sistem bioflok dengan padat penebaran tinggi. Ikan uji memiliki berat rata-rata 1,85±0,09 g yang dipelihara pada kolam terpolin berdiameter 1,72 m dan tinggi 1,05 m dengan volume air ±2.000 L sebanyak empat unit dengan kepadatan yang berbeda yaitu 1.000 ekor/m 3 , 1.500 ekor/m 3 , 2.000 ekor/m 3 , 2.500 ekor/m 3 . Selama 40 hari masa pemeliharaan, ikan diberi pakan buatan berkadar protein 28,75% dengan frekwensi dua kali sehari, sebanyak 3% dari berat tubuh. Hasil penelitian menunjukkan bahwa perlakuan perbedaan padat penebaran tinggi pada sistem bioflok memberikan pengaruh yang nyata terhadap pertumbuhan mutlak, retensi lemak dan retensi energi (P<0,05) namun tidak memberikan pengaruh nyata terhadap laju pertmbuhan harian. Hasil penelitian menunjukkan bahwa semakin tinggi padat penebaran terjadinya peningkatan retensi lemak dan retensi energi yaitu pada perlakuan padat penebaran 2.500 ekor/m 3 tetapi terjadi penurunan nilai retensi protein dan pertumbuhan pada ikan. Nilai pertumbuhan mutlak tertinggi ditunjukkan oleh perlakuan dengan padat penebaran 1.500 ekor/m 3 .

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“…As the shrimp in all treatments received the same dietary supplementation of proteins and lipids contained in the commercial diet, and only little correlations (r ¼ 0.17 and r ¼ À0.33, respectively) was observed between the shrimp protein and lipid assimilation and the protein and lipid content in the carbon sources, the altered assimilation values can only result from protein and lipid utilization in the form of biofloc biomass. One of our recent studies [33] showed that according to the essential amino acid composition, biofloc can be considered a good quality protein source. Xu et al [11] suggested that the improvement of protein assimilation by animals reared in BFT systems is also related to the increase in digestive proteinase activity in the intestinal tract as a result of the contribution of both exogenous digestive enzymes by the microbes in the biofloc and the endogenous digestive enzymes production as stimulated by the biofloc.…”

Section: Discussionmentioning

confidence: 99%

Immune response and disease resistance of shrimp fed biofloc grown on different carbon sources

Ekasari¹,

Azhar²,

Surawidjaja³

et al. 2014

Fish & Shellfish Immunology

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The size of biofloc determines the nutritional composition and the nitrogen recovery by aquaculture animals

Cited by 213 publications

References 21 publications

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Growth performance of African catfish Clarias gariepinus cultured in biofloc system at high stocking density

Immune response and disease resistance of shrimp fed biofloc grown on different carbon sources

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