Biofloc technology used in the intensive aquaculture of Corydoras aeneus

[bekateen]

Diatin, I., Suprayudi, M.A., Budiardi, T., Harris, E., & Widanarni, W. (2019). Biofloc technology on the intensive aquaculture of bronze corydoras ornamental fish Corydoras aeneus with different stocking densities. Jurnal Akuakultur Indonesia, 18(2): 202-213.

DOI: https://doi.org/10.19027/jai.18.2.202-213
https://jurnal.ipb.ac.id/index.php/jai/ ... view/28229
PDF: https://jurnal.ipb.ac.id/index.php/jai/ ... 8229/18010

ABSTRACT
Ornamental fish is non consumption fish which is an important source of Indonesian foreign exchange. The objective of this study is to analyze the productivity of bronze corydoras

Corydoras aeneus

ornamental fish through increased stocking density with biofloc technology. The average weight of the experimental corydoras was 0.61 ‒0.72 g with 2.32‒2.40 cm standard length. This study used a randomized design method with biofloc technology treatment in 3000, 4500, and 6000 fish/m2 stocking densities. The results showed that the daily length and weight-growth rate among treatments were not significantly different (P>0.05), while survival rate and the number of fish production on all treatments were significantly different (P<0.05). The water quality during the rearing period, such as temperature, pH, alkalinity, ammonia, nitrite, and nitrate, were in a tolerable range for corydoras culture. The total suspended solids tended to be higher due to higher stocking density. The best productivity using biofloc technology obtained from 6000 fish/m2 stocking density.

• Keywords: Biofloc technology, Corydoras aeneus, growth rate, stocking density, survival rate

ABSTRAK
Ikan hias merupakan produk perikanan non konsumsi yang menjadi sumber devisa Indonesia yang cukup penting. Penelitian ini bertujuan untuk menganalisis produktivitas ikan hias koridoras melalui peningkatan padat tebar dengan teknologi bioflok. Ikan yang digunakan adalah ikan hias koridoras (Corydoras aeneus) berbobot 0,61‒0,72 g dan panjang baku 2,32‒2,40 cm. Penelitian ini menggunakan rancangan acak lengkap dengan perlakuan teknologi bioflok pada padat tebar 3000, 4500, dan 6000 ekor/m2. Hasil penelitian menunjukkan bahwa laju pertumbuhan harian panjang dan bobot antar perlakuan tidak berbeda nyata (P>0,05), sedangkan kelangsungan hidup dan jumlah produksi ikan pada semua perlakuan berbeda nyata (P<0,05). Nilai kualitas air selama pemeliharaan yakni suhu, pH, alkalinitas, amonia, nitrit, dan nitrat yang berada pada kisaran yang cukup baik untuk budidaya ikan. Total padatan tersuspensi cenderung tinggi akibat dari semakin tinggi padat tebar. Produktivitas terbaik pada budidaya ikan koridoras dengan teknologi bioflok adalah pada padat tebar 6000 ekor/m2.

• Kata kunci: Corydoras aeneus, kelangsungan hidup, padat tebar, pertumbuhan, teknologi bioflok

[dw1305]

Hi all,
Now that is an interesting one. I wouldn't have thought that biofloc technology was suitable for culturing

Corydoras aeneus

, because the system relies on the fish eating the bioflocs, which are mainly comprised of bacteria and algae (with associated rotifers, protozoa etc).

You can find the details of the system in "Biofloc Technology (BFT): A Review for Aquaculture Application and Animal Food Industry" http://cdn.intechopen.com/pdfs/44409/In ... dustry.pdf) etc., but the basic premise is that you feed a high carbon food, and after that its a ‘negative feedback loop’ in which waste does not exist. Ammonia, generated from uneaten feed and fish, is converted into protein rich feed (the bioflocs) available for those same fish. The technique closes the nutrient loop, meaning that water exchange can be reduced without a deterioration in water quality.

I can see why it would work for culturing detrivores (like Prawn or Tilapia), but I'm struggling a bit more to see what the

Corydoras

would eat, and how you could retain water quality in the longer term.

cheers Darrel

[dw1305]

Hi all,
I've just had a glance at the paper. One thing that stand out is that the abstract is a bit misleading, because there was actually ~50% mortality in the 6000 m^2 density and ~33% mortality even in the lowest stocking density.

The highest survival rate was found on 3000 fish/m2 stocking density, while the lowest found on 6000 fish/m2 stocking density. Higher stocking density of fish cultured with biofloc technology results in a low survival rate........ However, the total production of bronze corydoras fish produced at the end of the study showed that the highest total production discovered on a very high intensive treatment (BFT6000). ......... BFT3000, BFT4500, and BFT6000 with 2025 ± 66 fish/m2 , 2792 ± 72 fish/ m2, and 3025 ± 180 fish/m2 respectively.....

cheers Darrel

[bekateen]

Yeah, it was a bit deceptive. I don't intend to stock 3000 fish pet tank, but I've been reading about biofloc technology and I'd like top understand it better.

Cheers, Eric

[bekateen]

Then there's this student work:

Sa'diyah, L. S. (2018). Kinerja Produksi Ikan Koridoras (Corydoras paleatus) pada Teknologi Bioflok C/N 12 dengan Padat Tebar Berbeda.

Corydoras Fish Production Performance (Corydoras paleatus) on C / N 12 Biofloc Technology with Different Stocking Density

http://repos.ipb.ac.id/jspui/handle/123456789/96703
PDF: http://repos.ipb.ac.id/jspui/bitstream/ ... C18lss.pdf

Ikan hias merupakan komoditas perikanan yang menjadi andalan baru dalam sektor budidaya perairan non konsumsi. Penelitian ini bertujuan menentukan kinerja produksi ikan koridoras (

Corydoras paleatus

) yang dipelihara pada teknologi bioflok C/N rasio 12 dengan padat tebar berbeda. Penelitian ini menggunakan rancangan acak lengkap dengan tiga perlakuan dan tiga kali ulangan. Penelitian ini meliputi padat tebar perlakuan A (1 000 ekor m-2), perlakuan B (3 000 ekor m-2), dan perlakuan C (5 000 ekor m-2). Ikan Corydoras paleatus yang digunakan memiliki panjang rata-rata 2.56±0.09 cm dan bobot rata-rata 0.65±0.13 g. Ikan dipelihara selama 50 hari menggunakan teknologi bioflok C/N 12. Penelitian menunjukkan pada padat tebar 5 000 ekor m-2 memiliki hasil terbaik yaitu dengan kelangsungan hidup 72.00 ± 2.83 %, laju pertumbuhan spesifik 2.62 ± 0.13 %, serta hasil analisis usaha dengan keuntungan terbesar yaitu Rp 188 421 078.

Ornamental fish is a fishery commodity that is a new mainstay in the non-consumption aquaculture sector. This study aims to determine the production performance of corridor fish (

Corydoras paleatus

) maintained on 12 C / N ratio biofloc technology with different stocking densities. This study used a completely randomized design with three treatments and three replications. This study included stocking density treatment A (1 000 m-2 tails), treatment B (3 000 m-2 tails), and treatment C (5 000 m-2 tails). Corydoras paleatus fish used had an average length of 2.56 ± 0.09 cm and an average weight of 0.65 ± 0.13 g. The fish were kept for 50 days using C / N 12 biofloc technology. Research shows that the stock density of 5 000 m-2 tails has the best results, namely survival 72.00 ± 2.83%, specific growth rate 2.62 ± 0.13%, and the results of business analysis with profit the largest is Rp. 188 421 078.