Fisheries Journal, 16 .
, 314-323 .
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org/10.
29303/jp.
THE EFFECT OF ADDITIONAL BREADAoS YEAST IN FEED AT DIFFERENT DOSES ON INCREASING THE GROWTH OF NILE TILAPIA (Oreochromis niloticu.
Pengaruh Penambahan Ragi Roti Pada Pakan Dengan Dosis Berbeda Terhadap Peningkatan Pertumbuhan Ikan Nila (Oreochromis niloticu.
Dea Ayu Lukita Putri*.
Indra Wirawan.
Muhajir Aquaculture Study Program.
Dr.
Soetomo University Semolowaru Street No.
Menur Pumpungan.
Sukolilo District.
Surabaya City.
East Java *Coresponding Author: dea31549@gmail.
(Received January 8th 2026.
Accepted Januari 24th 2.
ABSTRACT Tilapia (Oreochromis niloticu.
is a freshwater fish that is easy to maintain and susceptible to disease, making it a widely cultivated freshwater fish commodity.
Its growth rate makes tilapia more efficient in using feed, making it more profitable to cultivate.
Growth is a process of increasing the length and weight of an organism that can be seen from changes in length and weight in a unit of time.
The quality and quantity of feed affect the growth of tilapia.
Baker's yeast (Saccharomyces cerevisia.
contains nucleotides in the form of purines and pyrimidines.
The nucleotides contained in baker's yeast can increase fish appetite.
This makes fish tend to eat and are able to digest feed well, which results in growth.
The purpose of this study was to determine the effect of adding baker's yeast to feed at different doses on increasing the growth of tilapia.
This study will use three different doses of baker's yeast to observe how each dose can affect the growth of tilapia.
The method used is a Completely Randomized Design (CRD) with 3 replications for each dose of baker's yeast.
The collected data will be analyzed using descriptive statistical analysis to provide an overview of what happens with the data on the effect of adding baker's yeast to feed at different doses on increasing the growth of Tilapia fish.
Key words: Tilapia (Oreochromis niloticu.
baker's yeast (Saccharomyces cerevisia.
absolute growth.
ABSTRAK
Ikan Nila (Oreochromis niloticu.
merupakan ikan air tawar yang mudah dipelihara dan rentan terhadap penyakit, sehingga merupakan komoditas ikan air tawar yang banyak dibudidayakan.
Kecepatan pertumbuhan membuat ikan Nila lebih efisien dalam penggunaan pakan, sehingga lebih mengungtungkan untuk dibudidayakan.
Pertumbuhan merupakan suatu proses pertambahan panjang dan juga berat dari suatu organisme yang mampu dilihat dari perubahan ukuran panjang dan berat dalam satuan waktu.
Kualitas dan kuantitas pakan mempengaruhi e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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pertrumbuhan ikan Nila.
Ragi roti (Saccharomyces cerevisia.
mengandung nukleotida dalam bentuk purin dan pirimidin.
Nukleotida yang terkandung dalam ragi roti dapat meningkatkan nafsu makan ikan.
Hal ini membuat ikan cenderung makan dan mampu mencerna pakan dengan baik yang mengakibatkan pertumbuhan.
Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan ragi roti pada pakan dengan dosis yang berbeda terhadap peningkatan pertumbuhan ikan Nila.
Penelitian ini akan menggunakan tiga perlakuan dosis ragi roti yang berbeda, untuk mengamati bagaimana masing masing dosis yang dapat mempengaruhi peningkatan pertumbuhan ikan Nila.
Metode yang akan digunakan adalah Rancangan Acak Lengkap (RAL) dengan 3 kali ulangan untuk setiap dosis ragi roti.
Data yang dikumpulkan akan dianalisis menggunakan analisis statistik deskriptif untuk memberikan gambaran umum tentang apa yang terjadi dengan data pada pengaruh penambahan ragi roti pada pakan dengan dosis yang berbeda terhadap peningkatan pertumbuhan ikan Nila.
Kata kunci: ikan Nila (Oreochromis niloticu.
ragi roti (Saccharomyces cerevisia.
pertumbuhan mutlak.
INTRODUCTION
Tilapia (Oreochromis niloticu.
is a freshwater fish widely consumed by Indonesians.
Besides its affordability, tilapia is also readily available throughout Indonesia.
Global tilapia production has increased significantly.
In 2010, global tilapia production reached 4.
3 million tons and is predicted to increase to 7.
3 million tons by 2030 (Ashuri, 2.
Tilapia ranks third after shrimp and salmon as an example of successful aquaculture (Samsu and Nanang, 2.
Indonesian tilapia (Oreochromis niloticu.
is one of the fishery products trusted in the international market.
Therefore, tilapia (Oreochromis niloticu.
is one of the 10 leading Indonesian fishery export commodities (Bratadharma, 2.
, making it a widely cultivated freshwater fish commodity.
Tilapia (Oreochromis niloticu.
is a popular fish species for both cultivation and consumption.
Its rapid growth potential, omnivorous nature, and easy reproduction make this fish a favorite among fish farmers.
The rapid growth rate makes tilapia (Oreochromis niloticu.
more efficient in feed utilization, making it more profitable to cultivate (Kurnianti, 2.
In general, production in the fisheries sector, particularly tilapia, has increased year after year.
This high export volume presents an opportunity for stakeholders to capitalize on by developing alternatives to similar commodities to increase diversity and further boost the development of fish farming in Indonesia.
Growth is a process of increasing the length and weight of an organism that can be seen from changes in length and weight in a unit of time.
The quality and quantity of feed affect the growth of Tilapia (Oreochromis niloticu.
, in addition to age and water quality can also affect its growth (Mulqan.
Afdhal.
Rahimi, & Dewiyanti, 2.
Feed conversion and feed efficiency are indicators to determine the effectiveness of feed.
Feed conversion can be interpreted as the ability of aquaculture species to convert feed into meat.
The feed conversion value indicates the extent to which food is efficiently utilized by fish (Amalia.
Amrullah, & Surianti, 2.
The habitat and diet of Tilapia (Oreochromis niloticu.
play a major role in determining its Providing sufficient and appropriate food, along with a conducive environment, can increase the percentage of survival (Iskardar and Elrifadah, 2.
Upon further examination, it can be seen that increasing fish body weight is also related to the fish's ability to utilize and digest the feed provided.
Kammarudin et al.
, .
, further explained that baker's yeast can improve feed digestibility and growth in Baronang fish, which in turn simultaneously increases the growth of fish consuming feed enriched with baker's yeast.
In addition to containing nucleotides, baker's yeast can also act as a probiotic that can enhance e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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the immune response, provide enzymes that are good for digesting feed, and improve feed
RESEARCH METHODS
Place and Time of Research This research will be conducted from October 2025 to December 2025.
In Datengan village.
Grogol sub-district.
Kediri district.
Research Tools and Materials The research tools that will be used consist of 175 Tilapia fish as experimental animals, commercial feed .
PF 1000, well water as a maintenance medium, 25 research containers .
allons of mineral wate.
, digital scales to measure biomass, rulers/measuring tools, stationery, aerators, bread yeast (Fermipa.
Each maintenance container is filled with 7 liters of water, then left to settle for 24 hours.
Research methods This study uses an experimental method, this method is the most scientifically reliable .
ost vali.
, because it is carried out with strict control of interfering variables outside the experimental ones (Arsyad.
N and F.
Fatmawati, 2.
Furthermore, this study uses a Completely Randomized Design (CRD) with 5 treatments and 5 replications.
The treatment used is the addition of baker's yeast with different doses in Tilapia fish feed, namely .
0%, .
2%, .
4%, .
6%, .
Research Procedures The research began with the preparation and arrangement of the research containers.
The containers used in this study were 25 mineral water gallon jugs with the tops cut off, each with a capacity of 15 liters.
Before use, the gallons were washed thoroughly with soap and They were then arranged according to the predetermined research layout and filled with the prepared water.
Next, the research feed was prepared, using commercial feed.
Before the feed was given to the test animals, it was first weighed according to the predetermined treatment.
According to Manurung et al.
, before the feed was given to the test animals, the feed and bread yeast were first weighed according to the predetermined treatment dosage.
After the fish were placed in the treatment container, they were acclimatized for 15-20 minutes.
The purpose of this acclimatization was so that the fish could adjust to their new environment.
Furthermore, the fish were less easily stressed due to the temperature difference between the plastic and the research container (Yanuassary M, 2.
The stocking density of the test animals used in the study was 5 fish per container.
Bangun Swasono .
stated that the ideal stocking density for fish is 1-2 fish per liter.
Water changes were performed every 3 days, and water quality was monitored.
At the end of the study, the fish were weighed to determine their final weight.
Testing Parameters The parameters observed in this study include the absolute weight growth of Tilapia fish as the main parameter and water quality as a supporting parameter.
Absolute Weight Growth Measurement At the end of the study, absolute weight growth (W.
was measured by weighing the total weight of biomass in each treatment and recording it to obtain the absolute weight growth results for each treatment using the Effendie .
formula as follows:
Average weight formula H = Wt Ae Wo : Absolute weight growth e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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: Final weight : Initial weight Data analysis After the research is completed, the data is collected and then analyzed.
Prayitno.
D .
, states that to determine whether or not the independent variable has an influence on the dependent variable, a one-way analysis of variance (ANOVA) is performed.
RESULTS
Based on the results of research on the effect of commercial feed doses on the absolute weight growth of Tilapia (Oreocrhomis niloticu.
, different averages were obtained between treatments as presented in the Appendix.
The range, average, standard deviation and absolute weight growth of Tilapia (Oreocrhomis niloticu.
for each treatment can be seen in the table Table 1.
Range, mean and standard deviation of absolute weight growth of Nile tilapia Absolute weight growth range of Nile tilapia (Oreocrhomis niloticu.
Average .
Standard
0,54772 2Ae3
4Ae5
0,44721
5Ae7
0,83666
7Ae8
0,54772
8 Ae 10
0,83666
Treatment Based on table 1 above, the results obtained are that treatment A .
% bread yeast dos.
gives an average absolute weight growth value of 2.
6 grams with a standard deviation of.
Treatment B .
% bread yeast dos.
gives an average absolute weight growth value of 4.
2 grams with a standard deviation of.
Treatment C .
% bread yeast dos.
gives an average absolute weight growth value of 5.
8 grams with a standard deviation of.
Treatment D .
% bread yeast dos.
gives an average absolute weight growth value of 7.
6 grams with a standard deviation of.
Treatment E .
% bread yeast dos.
gives an average absolute weight growth value of 9.
2 grams with a standard deviation.
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Absolute Weight Growth of Tilapia Perlakuan A Perlakuan B Perlakuan C Perlakuan D Perlakuan E Figure 1.
Graph of the average absolute weight growth of Tilapia fish The results of Figure 1 above show that the absolute weight of Tilapia fish during the study had the highest average weight in treatment E .
% bread yeast dos.
with an average absolute weight of 9.
2 g, followed by treatment D .
% bread yeast dos.
with an average absolute weight 6 g, then treatment C .
% bread yeast dos.
8 g and treatment B .
% bread yeast dos.
2 g, ending with treatment A .
% bread yeast dos.
6 g.
To determine whether there are significant differences between treatments, an ANOVA test was carried out and the results are presented in table 2 below.
Table 2.
One-Way ANOVA Test of Absolute Weight Growth of Tilapia Sum of Squares Mean Square Sign.
Between Groups 137,840 34,460 78,318 0,001 Within Groups 8,800 0,440 Total
146,640
Based on Table 2 above, it can be explained that the dosage of baker's yeast significantly affected the absolute length growth of Tilapia fish (F > Sign.
Furthermore, to determine the level of difference between each treatment on the absolute weight growth of Tilapia fish, a 5% LSD test was conducted.
Meanwhile, the average and notation of the absolute weight growth of Tilapia fish can be seen in Table 3 below.
Table 3.
Average and Notation of Absolute Weight Growth of Tilapia Treatment Subset for alpha = 0,05 2,6a 4,2b 5,8c 7,6d 9,2e Based on table 3 above, it can be explained that treatment A is significantly different from treatments B.
D and E, then treatment B is significantly different from treatments C, e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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D and E.
Meanwhile, treatment C is significantly different from treatments D and E, and likewise treatment D is significantly different from treatment E.
Water Quality Monitoring Water Temperature Based on the research results, the water temperature in each treatment did not have a significant effect on the absolute weight growth of Tilapia fish.
The range of values, averages, and standard deviations of water temperature levels on the absolute weight growth of Tilapia fish in each treatment and replication are presented in Table 4 below.
Table 4.
Range.
Mean and Standard Deviation of Temperature for Each Treatment
Treatment
Range Average Standard
Deviation A: Bread Yeast Dosage 0% 27 Ae 29 AC
0,8367
B: Bread Yeast Dosage 2% 27 Ae 28 AC
0,5477
C: Bread Yeast Dosage 4% 27 Ae 28 AC
0,5477
D: Bread Yeast Dosage 6% 27 Ae 29 AC
0,7071
E: Bread Yeast Dosage 8% 27 Ae 29 AC
0,8367
Based on Table 4 above, relatively similar temperatures ranging between 27 and 29 AC are still considered normal for tilapia.
Furthermore, to determine any significant differences between water temperatures in each treatment, a one-way ANOVA test was conducted, the results of which can be seen in Table 5 below.
Table 5.
One-Way ANOVA Test of Temperature Sum of squares Mean square Sign.
Between Groups 1,040 0,260 0,520 0,772 Within Groups 10,000 0,500 Total
11,040
Based on the table above, it shows that the water temperature level in each treatment did not have a significant effect on the absolute weight growth of Tilapia fish.
Degree of Acidity .
H) Based on the research results, water pH in each treatment did not significantly affect the absolute weight growth of tilapia.
The range, average, and standard deviation of water pH levels on the absolute weight growth of tilapia in each treatment and replication are presented in Table 6 below.
Table 6.
Range.
Average and Standard Deviation of Acidity Degree for Each Treatment Treatment Range Average Standard Deviation A: Bread Yeast Dosage 0% 7,2 Ae 7,4 7,28 0,1095 B: Bread Yeast Dosage 2% 7,1 Ae 7,3 7,24 0,0894 C: Bread Yeast Dosage 4% 2 Ae 7,5 0,1225 D: Bread Yeast Dosage 6% 7,2 Ae 7,4 7,32 0,0837 E: Bread Yeast Dosage 8% 7,2 Ae 7,4 7,28 0,1095 e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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Table 6 above shows that a relatively consistent pH ranging from 7.
1 to 7.
5 is still considered normal for tilapia.
Furthermore, to determine any significant differences between the water pH values in each treatment, a one-way ANOVA test was conducted, and the results are shown in Table 7 below.
Table 7.
One-Way ANOVA Test of Acidity Degree Sum of squares Mean square Sign.
Between Groups 0,018 0,004 0,407 0,801 Within Groups 0,216 0,011 Total
0,234
Based on the table above, it shows that the pH level of the water in each treatment did not have a significant effect on the absolute weight growth of Tilapia fish.
Dissolved Oxygen (DO) Based on the research results, dissolved oxygen in water in each treatment did not have a significant effect on the absolute weight growth of tilapia.
The range of values, averages, and standard deviations of dissolved oxygen levels in water on the absolute weight growth of tilapia in each treatment and replication are presented in Table 8 below.
Table 8.
Range.
Mean and Standard Deviation of Dissolved Oxygen for Each Treatment Treatment Range Average Standard Deviation A: Bread Yeast Dosage 0% 5,3 Ae 5,7 5,52 0,1483 B: Bread Yeast Dosage 2% 5,4 Ae 5,6 5,46 0, 0894 C: Bread Yeast Dosage 4% 5,3 Ae 5,7 5,52 0, 1643 D: Bread Yeast Dosage 6% 5,3 Ae 5,6 5,48 0, 1304 E: Bread Yeast Dosage 8 % 5,4 Ae 5,5 5,46 0, 0548 Based on Table 8 above, the relatively similar dissolved oxygen levels, ranging from 3 to 5.
7 ppm, are still considered normal for tilapia.
Furthermore, to determine any significant differences between the DO levels in each treatment, a one-way ANOVA test was conducted, and the results can be seen in Table 9 below.
Table 9.
One-Way ANOVA Test of Dissolved Oxygen Sum of squares Mean square Sign.
Between Groups 0,000 0,000 0,022 0,999 Within Groups 0,041 0,002 Total
0,041
Based on the table above, it shows that the DO levels of water in each treatment did not have a significant effect on the absolute weight growth of Tilapia fish.
DISCUSSION
The Effect of Adding Baker's Yeast to Feed at Different Doses on Increasing the Growth of Tilapia (Oreochromis niloticu.
The Effect of Adding Bread Yeast to Feed with Different Doses on Increasing the Growth of Tilapia (Oreochromis niloticu.
The treatment of E bread yeast with a dose of 8% e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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gave the highest value, this result is suspected that the feed treatment given can meet the nutritional needs required by Tilapia compared to other treatments.
This is because Tilapia does not only obtain the nutrients contained in commercial feed but also nutrients from bread yeast, because bread yeast contains high enough protein so that it can meet the nutritional needs required by Tilapia seeds.
The results of the study showed that the absolute weight growth value of the 8% yeast treatment indicated that the feed could be utilized well by Tilapia.
Providing different doses of yeast in Tilapia fry feed is a good way to help the fish in their growth process.
The protein content in yeast is also quite high so that the combination of yeast and commercial feed in the form of pellets will be able to accelerate the weight growth process of Tilapia.
Protein in the process of fish growth is very necessary if the protein in the feed is lacking, then the protein in the body tissue will be used to maintain more important tissue functions.
Therefore, providing sufficient protein in the feed is necessary.
According to Juliana et al.
, .
The protein required by fish in the growth phase requires at least 30%-36% protein to be able to provide significant value to the growth of the fish.
Therefore, the excess protein in the combination of yeast and pellets can play a role in the growth rate of fish because high protein can increase the body weight of fish.
Protein is essential for fish growth.
If protein in the feed is insufficient, the protein in the body's tissues will be utilized to maintain more important tissue functions.
Therefore, providing sufficient protein in the feed is necessary.
According to Juliana et al.
, .
, the protein required by fish during the growth phase requires at least 30%-36% protein to significantly contribute to their growth.
Therefore, the excess protein in the combination of bread yeast and pellets can play a role in fish growth rate because high protein can increase fish body weight.
While in treatment A .
% Pelle.
gave the lowest value of this result is suspected because treatment A does not use bread yeast so that the nutritional needs of Tilapia fish cannot be met and causes the feed to not be utilized properly.
From the results of previous studies it explains that providing commercial feed alone is not able to meet the growth of fish weight.
The nutritional content contained in commercial feed without any combination is less able to help the fish growth process so that it causes fish growth to be low because natural feed is the best feed, this is because the nutritional content contained in natural feed cannot be replaced by any artificial feed Herawati et.
, .
Water Quality During the research, the water quality levels in the research media still showed normal conditions that could be tolerated by Nile tilapia for their growth.
Water Temperature The water temperature during the study ranged between 27 and 29AC, a range considered normal for tilapia.
Sudden, drastic drops in temperature can stress tilapia and hinder their growth.
Jumaidi et al.
stated that the average temperature for maintaining tilapia is 25-30AC.
Degree of Acidity .
H) The acidity level in the research media obtained a value ranging from 7.
1 Ae 7.
5, which is still considered normal for Tilapia.
According to Supriatna, et al.
, .
, pH concentration can affect the level of water fertility.
(Pratama and Mukti, 2.
stated that the optimal pH level for raising Tilapia fish seeds is 6.
Dissolved Oxygen (DO)Dissolved Oxygen (DO) Dissolved oxygen is an important element in the life of fish in research media.
Dissolved oxygen in the media during the research obtained values ranging from 5.
3 - 5.
7 ppm, this value is still considered normal for Tilapia.
According to Sulistyo et al.
, .
in Pratama e-ISSN : 2622-1934, p-ISSN : 2302-6049 Jurnal Perikanan, 16 .
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et al.
, .
a good dissolved oxygen level for Tilapia cultivation is 4-6 ppm.
The dissolved oxygen level for Tilapia seed enlargement is 5.
3 -7 ppm.
This dissolved oxygen level is still at an optimal level to support survival and growth rate.
CONCLUSION
Based on the results of research on the Effect of Adding Bread Yeast to Feed with Different Doses on Increasing the Growth of Tilapia (Oreochromis niloticu.
It can be concluded that .
The effect of adding bread yeast to feed with different doses has a significant effect on the absolute weight growth of Tilapia (Oreochromis niloticu.
In treatment E .
ddition of bread yeast with a dose of 8%) it provides the highest growth value of 9.
2 grams.
Water quality data during the study was in a good range or could be said to be normal, namely Temperature: 27 - 29 AC, pH: 7.
1 - 7.
5 and Dissolved Oxygen: 5.
3 - 5.
7 ppm.
ACKNOWLEDGEMENTS
This research is specially dedicated to the Dean.
Vice Dean.
Head of Study Program, and Thesis Supervisor at Dr.
Soetomo University Surabaya, for their invaluable guidance, direction, and input throughout the research process.
The author also expresses sincere gratitude to his parents, siblings, friends, and spouse for their moral support, motivation, and constant prayers, which have been the main source of strength in completing this research.
REFERENCES