Growth performance and feed utilization of African catfish <i>Clarias gariepinus</i> fed a commercial diet and reared in the biofloc system enhanced with probiotic

Iskandar Putra; Rusliadi Rusliadi; Muhammad Fauzi; Usman M. Tang; Zainal A. Muchlisin

doi:10.12688/f1000research.12438.1

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Research Note

Growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic

[version 1; peer review: 2 approved]

Iskandar Putra¹, Rusliadi Rusliadi¹, Muhammad Fauzi ¹, Usman M. Tang¹, Zainal A. Muchlisin²

Iskandar Putra¹, Rusliadi Rusliadi¹, [...] Muhammad Fauzi ¹, Usman M. Tang¹, Zainal A. Muchlisin²

PUBLISHED 22 Aug 2017

Author details Author details

¹ Faculty of Fisheries and Marine Sciences, Riau University, Pekanbaru, Riau, 28293, Indonesia
² Faculty of Marine and Fisheries, Syiah Kuala University, Banda Aceh, 23111, Indonesia

Iskandar Putra
Roles: Conceptualization, Formal Analysis, Funding Acquisition, Methodology, Resources, Validation

Rusliadi Rusliadi
Roles: Conceptualization, Data Curation, Investigation, Methodology

Muhammad Fauzi
Roles: Conceptualization, Data Curation, Formal Analysis, Investigation

Usman M. Tang
Roles: Methodology, Validation, Writing – Original Draft Preparation

Zainal A. Muchlisin
Roles: Supervision, Validation, Writing – Review & Editing

OPEN PEER REVIEW

REVIEWER STATUS

Abstract

Background
The objective of the present study was to evaluate the growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic.
Methods
The treatment was the frequency of probiotic application into the cultured system, namely, 5-day interval, 10-day interval, and 15-day interval for 60 days of experiment. Biofloc culture was grown in an experiment tank (vol. 2000 L) by mixing the probiotic (Bacillus sp.) 10 mL and molasses 200 mL per liter of water. The fish was stocked into the biofloc system 7 days after cultured at stocking density of 1000 fish tank^-1. The fish was fed a commercial diet that contains 38% crude protein, twice a day at satiation. The application of probiotic was reperformed after 5 days, 10 days, and 15 days after stocking.
Results
The study showed that the growth performance, survival, and feed utilization of African catfish were higher in the treatment at 5-day intervals over 60 days. The ANOVA test showed that the application frequency of probiotic into biofloc system of cultured media had the significant effect on the growth performance, survival rate, and feed utilization of African catfish.
Conclusion
The best growth performance and feed utilization were found at the application of probiotic into biofloc system at 5-day intervals over 60 days.

Keywords

Biofloc, Probiotic Frequency, Survival Rate

Corresponding author: Muhammad Fauzi

Competing interests: No competing interests were disclosed.

Grant information: This study was supported by the Ministry of Research, Technology and Higher Education (Ristekdikti) of the Republic of Indonesia through the competitive grants scheme (Contract number: 430/UN.19.5.1.3/LT/2016).
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Copyright: © 2017 Putra I et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The author(s) is/are employees of the US Government and therefore domestic copyright protection in USA does not apply to this work. The work may be protected under the copyright laws of other jurisdictions when used in those jurisdictions. Data associated with the article are available under the terms of the Creative Commons Zero "No rights reserved" data waiver (CC0 1.0 Public domain dedication).

How to cite: Putra I, Rusliadi R, Fauzi M et al. Growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic [version 1; peer review: 2 approved]. F1000Research 2017, 6:1545 (https://doi.org/10.12688/f1000research.12438.1) First published: 22 Aug 2017, 6:1545 (https://doi.org/10.12688/f1000research.12438.1) Latest published: 22 Aug 2017, 6:1545 (https://doi.org/10.12688/f1000research.12438.1)

Introduction

Feed is one of the important agro-inputs in aquaculture production system that contributes to approximately 40–60% of production cost^1,2 and it has direct effect on the growth rate of the fish^3–6. The aquaculture activity is commonly produced waste, for example, feed remains and feces which changes into ammonia and nitrite once the oxygen level is low. In the closed culture system the concentrations of ammonia (NH₃) and nitrite (NO₂) are increasing rapidly and would be toxic to organisms^7,8.

According to Asaduzzaman et al.⁹ and De Schryver et al.¹⁰ the intensive application of commercial feed in the aquaculture causes environmental pollution and increases the possibility of the disease outbreak. Therefore, the water quality management is crucial in the aquaculture system. The objective of water quality management is to provide the comfortable environment and meet the optimum requirements for cultured organisms¹¹. According to Gunadi and Hafsaridewi¹² the microbial activities can be used to improve water quality and reduce the burden of contamination by fish farming waste. Therefore, the heterotrophic bacteria have promising potency to be applied in the utilization of waste ammonia in the fish culture. Beside, these bacteria are formed as a floc (clumps) in the cultures media; hence it can be used as an alternative feed source for cultured fish¹³. Biofloc has abilities to suppress the toxic compounds such as ammonia and harmful bacteria (pathogenic) so that the cultured organisms grow well¹⁴. Application of biofloc in the cultures system has been reported by several researchers, for example, in the culture of channel catfish^14,15, in the South American catfish Rhamdia quelen¹⁶, in Nile tilapia Oreochromis niloticus^17,18, Farfantepenaeus brasiliensis¹⁹, and in the cultured system of the shrimps Litopenaeus vannamei and Penaeus monodon^11,20. However, application of biofloc on African catfish Clarias gariepinus cultures has never been reported previously.

African catfish is the popular species for aquaculture business in Southeast Asian countries²¹. This species has several advantages, for example, resistance to diseases and handling stress and high growth rate²², thus accounting for its commercial importance worldwide²³. Nowadays, the fish farmer fed a commercial diet for African catfish. The protein requirement for African catfish ranges from 25% to 40%, lipid 9.5 to 10%, carbohydrates 15 to 30%, vitamins 0.25 to 0.40%, and minerals 1.0%¹, with energy level of 2000 cal/g to 3000 cal/g²⁴. In addition, the application of probiotic into African catfish diet has been reported by several researchers, for example, Al-Dohail et al.²⁵, Ige²⁶, and Dennis and Uchenna²⁷. However, application of probiotic combing with biofloc has never been reported previously. Hence, the aim of the study was to evaluate the growth performance and feed utilization of African catfish fed experimental diet reared in the biofloc cultured system and enhanced with probiotic.

Methods

Site and time

The research was conducted from June 2016 to August 2016 at Aquaculture Technology Laboratory, Faculty of Fishery and Marine Sciences, Riau University, Indonesia. The experiments were carried out within the ethical guidelines provided by the research institution and national or international regulations.

Experimental design

The completely random design (CRD) method was used in this study. The tested treatment was the frequency of probiotics application (bacteria inoculation), namely, at 5-day interval (treatment A), 10-day interval (treatment B), and 15-day interval (treatment C). The treatment was conducted at three replications. The experimental fish was maintained in the canvas tank (vol. 2000 L) at stocking density of 1000 fishes and reared for 60 days.

Biofloc culture and feeding

The biofloc was cultured in the nine canvas tanks with a volume of 2000 L. Each tank was filled with water up to a water level of 100 cm or equivalent to 2000 L. Biofloc culture was done by mixing the probiotic (Bacillus sp.) 10 mL and molasses 200 mL L^-1 of water and then mixed into the cultures fish tanks and aerated continuously for 7 days to grow the floc.

The catfish larvae were stocked at the density of 1000 fish tank^-1 with average weight 1.12±0.05 g and average total length 4.42±0.09 cm. The application of 10 mL inoculants bacteria with density of Bacillus sp. about 5×10¹⁰ colony forming units (CFU) was performed according to respective treatment, that is, 5-day, 10-day, and 15-day intervals. The experimental catfish feed was a commercial diet with 38% crude protein, crude lipid 5%, and crude fiber 6%, mineral mix 13%, and 13% moisture contents. The fish were fed twice a day at satiation. The weight gain of fish was measured every 12 -days for 60 days.

Measured parameters

The weight gain was calculated as follows: W = Wt – Wo, where W is weight gain (g), Wt is the weight of the fish at the end of experiment (g), and Wo is the weight of fish at the start of experiment (g). The daily growth rate, survival rates, and feed utilization were calculated based on Muchlisin et al.^28,29 The main water quality parameters such as dissolved oxygen (DO), pH, and temperature were measured using a digital water checker (YSI-550 A, ASTM, Alla, France) at 6-day intervals, while total ammonia nitrogen (TAN) was measured every 6 days using spectrophotometric method³⁰.

Data analysis

The data were subjective to one-way analysis of variant (ANOVA) test to determine the effect of treatment on the tested parameters and followed by Newman-Keuls multiple range test with a confidence level of 95%, while the water quality of the data was analyzed descriptively.

Results

The ANOVA test showed that the treatment had a significant effect on the weight gain (WG), specific growth rate and survival rate (SGR), feed efficiency (FE), and feed conversion ratio (FCR) (P<0.05). The study showed that the highest weight gain and specific growth rate were recorded at treatment A; these values were different significantly from other treatments. A similar trend was also found in the survival rate (SR) where the highest survival rate was recorded in treatment A, but this value was not different significantly from treatment C (Table 1). The highest feed efficiency and lower feed conversion ratio were also found in fish with application of probiotic into biofloc system at 5-day intervals (treatment A). However, these values were not different significantly from treatment C (probiotic application at 15-day intervals). In addition, the water temperature ranges from 29.50°C to 29.62°C, dissolved oxygen rages from 3.64 mg L^-1 to 3.88 mg L^-1, and pH ranges from 6.93 to 7.02. In addition, the ammonia (NH₃) content ranged from 0.292 mg L^-1 to 0.411 mg L^-1 and nitrite content ranged from 0.08 mg L^-1 to 0.09 mg L^-1. Therefore, there were no significant differences regarding water quality among the treatments; however, the quality in treatment A was slightly better compared to two other treatments (Table 2). The data showing the total length, body weight and total feed consumed by fish at every experiment can be found in Dataset 1.

Table 1. The growth performance, survival rate, and feed utilization of African catfish, Clarias gariepinus.

Mean of values in the same row followed by a different superscript that are significantly different (p<0.05).

No	Parameter	Application frequency of probiotic
		5-day interval	10-day interval	15-day interval
1.	Weight gain (g)	125.89±1.96^b	85.57±5.80^a	94.19±22.81^a
2.	SGR (% day^-1)	7.91±0.06^b	7.28±0.06^a	7.34±0.40^a
3.	Survival rate (%)	95.77±0.66^b	75.23±9.70^a	91.37±4.78^b
4.	Efficiency of the feed (%)	110.86±2.60^b	88.17±6.89^a	90.98±5.69^a
5.	Feed conversion ratio	0.90±0.02^a	1.14±0.08^b	1.10±0.07^b

Table 2. The main water quality parameter of the cultured media of African catfish (Clarias gariepinus).

Parameters	Unit	Application frequency of probiotic
Parameters	Unit	5-day interval	10-day interval	15-day interval
Temperature	C°	29.53±1.72^a	29.62±1.82^a	29.5±1.72^a
DO	mg L^-1	3.88±0.44^a	3.64±0.32^a	3.64±0.35^a
pH	-	7.02±0.10^a	6.93±0.11^a	6.97±0.09^a
(NH₃)	mg L^-1	0.292±0.11^a	0.332±0.176^a	0.411±0.195^b
NO₂	mg L^-1	0.09±0.076^a	0.08±0.036^a	0.09±0.035^a

Dataset 1.Study results.

The total length, body weight and total feed consumed by fish at every experiment

Discussion

The study showed that the growth performance, survival rate, and feed utilization of African catfish were the highest in the application of probiotic into the biofloc system at 5-day intervals. This was presumably due to the fact that the applications of probiotics every 5-days can maintain the density of bacteria at suitable forms and effectively decompose organic materials well. This is indicated by lower ammonium (NH₃) content in treatment A. According to Widanarni³¹ the application of biofloc into culture system can improve water quality and reduce the burden of contamination of fish culture waste in the surrounding waters. In addition Irianto³² stated that Bacillus sp. can improve the quality of the cultured media by decomposing organic materials, suppress the growth of pathogenic, and balance the microbial and had a positive effect on fish health and growth.

Besides maintaining the water quality, biofloc is also playing an important role as alternative natural feed for cultured fish. This is because the biofloc contains crude protein that reached 48–53%^33,34 and therefore the Feed Conversion Ratio (FCR) in treatment A was 0.90 (below 1.00) and the feed efficiency was higher than 100%. This is because of beside fed on the commercial diet the fish was also fed on floc that contain planktons. This value is better than fish fed on commercial diet without application of biofluc^33,35,36. According to Azim³⁴ the nutritional quality of biofloc was appropriate at least for herbivorous and omnivorous fish species. In this case, the African catfish is categorized as omnivorous feeding habits^35,37.

It is clear that biofloc contributed to the growth and production of cultured organism as shown in this study. The basic principle of this technology is using the heterotrophic bacteria to manage the C: N ratio in the water media^33,38,39. However, biofloc not only contains the bacteria, but also is composed of other microorganisms including microalgae and zooplanktons as food for farmed fish or shrimps³³. According to Crab et al.⁴⁰ biofloc can be consumed and digested well by the shrimp and therefore possibly substitute for artificial commercial feed. Hence, application of biofloc into cultured system can increase feed efficiency up to 13%³⁹. For example, for feed efficiency of African catfish fed a commercial diet without biofloc was 89.83 %³³; it was increased up to 110.86% when the biofloc was applied as shown in this study.

In addition, according to Avnimelech³⁸, the addition of molasses as a source of carbon in aquaculture system can improve the C/N ratio waters and will further reduce inorganic nitrogen in the waters through increased growth of heterotrophic bacteria, where the heterotrophic bacteria will form a floc which can be fed by fish as feed source. Furthermore the C: N ratio of >10: 1 in the fish farming system is the optimum ratio to enhance the biofloc production and minimize the ammonia regeneration ³⁹.

Conclusion

The application of probiotic bacteria with different frequencies in the biofloc system had the significant effect on the growth performance, survival rate, and feed utilization of African catfish (Clarias gariepinus). The higher growth performance and best feed utilization were recorded in the application of probiotic into biofloc system at 5-day intervals.

Data availability

Dataset 1: The total length, body weight and total feed consumed by fish at every experiment. 10.5256/f1000research.12438.d174980⁴¹

Competing interests

No competing interests were disclosed.

Grant information

This study was supported by the Ministry of Research, Technology and Higher Education (Ristekdikti) of the Republic of Indonesia through the competitive grants scheme (Contract number: 430/UN.19.5.1.3/LT/2016).

The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Acknowledgments

The authors thank the Ministry of Research, Technology and Higher Education of the Republic of Indonesia for supporting this study through the competitive grants scheme 2016 Contract number: 430/UN.19.5.1.3/LT/2016. The appreciation goes to all of our students who helped the authors during experiments in the laboratory.

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Version 1

VERSION 1 PUBLISHED 22 Aug 2017

Author details Author details

¹ Faculty of Fisheries and Marine Sciences, Riau University, Pekanbaru, Riau, 28293, Indonesia
² Faculty of Marine and Fisheries, Syiah Kuala University, Banda Aceh, 23111, Indonesia

Iskandar Putra
Roles: Conceptualization, Formal Analysis, Funding Acquisition, Methodology, Resources, Validation

Rusliadi Rusliadi
Roles: Conceptualization, Data Curation, Investigation, Methodology

Muhammad Fauzi
Roles: Conceptualization, Data Curation, Formal Analysis, Investigation

Usman M. Tang
Roles: Methodology, Validation, Writing – Original Draft Preparation

Zainal A. Muchlisin
Roles: Supervision, Validation, Writing – Review & Editing

Competing interests

No competing interests were disclosed.

Grant information

This study was supported by the Ministry of Research, Technology and Higher Education (Ristekdikti) of the Republic of Indonesia through the competitive grants scheme (Contract number: 430/UN.19.5.1.3/LT/2016).
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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Published: 22 Aug 2017, 6:1545

https://doi.org/10.12688/f1000research.12438.1

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© 2017 Putra I et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The author(s) is/are employees of the US Government and therefore domestic copyright protection in USA does not apply to this work. The work may be protected under the copyright laws of other jurisdictions when used in those jurisdictions. Data associated with the article are available under the terms of the Creative Commons Zero "No rights reserved" data waiver (CC0 1.0 Public domain dedication).

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Putra I, Rusliadi R, Fauzi M et al. Growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic [version 1; peer review: 2 approved] F1000Research 2017, 6:1545 (https://doi.org/10.12688/f1000research.12438.1)

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Reviewer Report 05 Sep 2017

Rudy Agung Nugroho, Animal Physiology, Development and Molecular Laboratory, Department of Biology, Faculty of Mathematic and Natural Science, Mulawarman University, Samarinda, Indonesia

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https://doi.org/10.5256/f1000research.13468.r25289

1. Title is suitable and clearly defined the research that has been done.

2. Abstract is well written and attract the reader. Please add information regarding the CFU of the bacillus (ex: 10 mL inoculants bacteria with ... Continue reading

1. Title is suitable and clearly defined the research that has been done.

2. Abstract is well written and attract the reader. Please add information regarding the CFU of the bacillus (ex: 10 mL inoculants bacteria with density of Bacillus sp. about 5×10¹⁰ colony forming units (CFU) ....).

3. Introduction: the introduction is well constructed and supported with current references.

4. Methods: a) please be specific on the ethical guidelines that author's performed in this research. Which international/national ethical guidelines. b) Please explain why the author use 5 days interval in this research. Is there any previous/preliminary research?

5. Results: Survival rate of B2 groups was only 65% (Raw data), any explanation?

6. Discussion: Good Discussion.

7. Conclusion: Well constructed summary.

8. Reference: please revise reference #1 : (Sahwan MF: The feed fish and shrimp. Penebar Swadaya. Jakarta. 1999. ), with original title and give translation. otherwise it cannot be traced.

Is the work clearly and accurately presented and does it cite the current literature?

Yes
Is the study design appropriate and is the work technically sound?

Yes
Are sufficient details of methods and analysis provided to allow replication by others?

Yes
If applicable, is the statistical analysis and its interpretation appropriate?

Yes
Are all the source data underlying the results available to ensure full reproducibility?

Partly
Are the conclusions drawn adequately supported by the results?

Yes

Competing Interests: No competing interests were disclosed.

Reviewer Expertise: Animal Physiology, Fish nutrition, Fish Immunology

I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.

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Reviewer Report 25 Aug 2017

Hafrijal Syandri, Department of Aquaculture, Faculty of Fisheries and Marine Science, Bung Hatta University , Padang, Indonesia

Approved

https://doi.org/10.5256/f1000research.13468.r25287

A comment for abstract: the fish was fed a commercial diet that contain 38% crude protein, twice a day at satiation, could you please show the time?

A comment for the methodology:
1. Please state the ... Continue reading

A comment for abstract: the fish was fed a commercial diet that contain 38% crude protein, twice a day at satiation, could you please show the time?

A comment for the methodology:
1. Please state the type of commercial feed used? floating or drowned feed?
2. The weight gain of fish measured every 12 day for 60 days, please show the data weight gain every 12-days in bar diagram or line graph?
3. Please explain the version (including city) of software used in statistical analysis?

Is the work clearly and accurately presented and does it cite the current literature?

Yes
Is the study design appropriate and is the work technically sound?

Yes
Are sufficient details of methods and analysis provided to allow replication by others?

Yes
If applicable, is the statistical analysis and its interpretation appropriate?

Partly
Are all the source data underlying the results available to ensure full reproducibility?

Partly
Are the conclusions drawn adequately supported by the results?

Yes

Competing Interests: No competing interests were disclosed.

I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.

CITE

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VERSION 1 PUBLISHED 22 Aug 2017

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Version 1 22 Aug 17	read	read

Hafrijal Syandri, Bung Hatta University , Padang, Indonesia
Rudy Agung Nugroho, Mulawarman University, Samarinda, Indonesia

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Reviewer Report

31 Views

05 Sep 2017 | for Version 1

Rudy Agung Nugroho, Animal Physiology, Development and Molecular Laboratory, Department of Biology, Faculty of Mathematic and Natural Science, Mulawarman University, Samarinda, Indonesia

31 Views Cite this report Responses(0)

Approved

1. Title is suitable and clearly defined the research that has been done.

2. Abstract is well written and attract the reader. Please add information regarding the CFU of the bacillus (ex: 10 mL inoculants bacteria with density of Bacillus sp. about 5×10¹⁰ colony forming units (CFU) ....).

3. Introduction: the introduction is well constructed and supported with current references.

4. Methods: a) please be specific on the ethical guidelines that author's performed in this research. Which international/national ethical guidelines. b) Please explain why the author use 5 days interval in this research. Is there any previous/preliminary research?

5. Results: Survival rate of B2 groups was only 65% (Raw data), any explanation?

6. Discussion: Good Discussion.

7. Conclusion: Well constructed summary.

8. Reference: please revise reference #1 : (Sahwan MF: The feed fish and shrimp. Penebar Swadaya. Jakarta. 1999. ), with original title and give translation. otherwise it cannot be traced.

Is the work clearly and accurately presented and does it cite the current literature?

Yes
Is the study design appropriate and is the work technically sound?

Yes
Are sufficient details of methods and analysis provided to allow replication by others?

Yes
If applicable, is the statistical analysis and its interpretation appropriate?

Yes
Are all the source data underlying the results available to ensure full reproducibility?

Partly
Are the conclusions drawn adequately supported by the results?

Yes

Competing Interests

No competing interests were disclosed.

Reviewer Expertise

Animal Physiology, Fish nutrition, Fish Immunology

I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.

Respond to this report

Responses (0)

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Reviewer Report

37 Views

25 Aug 2017 | for Version 1

Hafrijal Syandri, Department of Aquaculture, Faculty of Fisheries and Marine Science, Bung Hatta University , Padang, Indonesia

37 Views Cite this report Responses(0)

Approved

A comment for abstract: the fish was fed a commercial diet that contain 38% crude protein, twice a day at satiation, could you please show the time?

A comment for the methodology:
1. Please state the type of commercial feed used? floating or drowned feed?
2. The weight gain of fish measured every 12 day for 60 days, please show the data weight gain every 12-days in bar diagram or line graph?
3. Please explain the version (including city) of software used in statistical analysis?

Is the work clearly and accurately presented and does it cite the current literature?

Yes
Is the study design appropriate and is the work technically sound?

Yes
Are sufficient details of methods and analysis provided to allow replication by others?

Yes
If applicable, is the statistical analysis and its interpretation appropriate?

Partly
Are all the source data underlying the results available to ensure full reproducibility?

Partly
Are the conclusions drawn adequately supported by the results?

Yes

Competing Interests

No competing interests were disclosed.

I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.

Respond to this report

Responses (0)

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Growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic

Abstract

Keywords

Introduction

Methods

Site and time

Experimental design

Biofloc culture and feeding

Measured parameters

Data analysis

Results

Table 1. The growth performance, survival rate, and feed utilization of African catfish, Clarias gariepinus.

Table 2. The main water quality parameter of the cultured media of African catfish (Clarias gariepinus).

Discussion

Conclusion

Data availability

Competing interests

Grant information

Acknowledgments

References

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