Survival Rate and Growth of Fighting Fish Larvae (Betta splendens Regan) Fed on  Various Live Foods

Larval of fighting fish (Betta splendens Regan) requires precise live foods for its growth and survival. In this experiment, fish larvae were fed on either Paramecium + Artemia, Paramecium + Artemia + Tubifex, Paramecium + Moina, or Paramecium + Moina + Tubifex. The fish were fed Paramecium from day-2 till day-7 after hatching. There after, the live food was changed according to the treatments till day-28. Results showed that fish fed on Paramecium + Artemia significantly had the highest total length (12.63 mm) than other treatments (11.86 mm). On the other hand, survival rate of fish had no significant affected by the treatments. Keywords: fighting fish, Betta splendens, Paramecium, Moina, Artemia, Tubifex, larvae ABSTRAK Larva ikan betta (Betta splendens Regan) membutuhkan jenis pakan alami yang tepat bagi kelangsungan hidup dan pertumbuhannya. Pada penelitian ini, larva ikan diberi pakan berupa Paramecium + Artemia, Paramecium + Artemia + Tubifex, Paramecium + Moina, atau Paramecium + Moina + Tubifex. Ikan diberi pakan pakan berupa Paramecium dari hari ke-2 hingga hari ke-7. Setelah itu, pemberian pakan alami diubah berdasarkan masing-masing perlakuan hingga hari ke-28. Hasil penelitian menunjukkan bahwa ikan yang diberi pakan Paramecium + Artemia memiliki tubuh secara signifikan lebih panjang (12,63 mm) dibandingkan perlakuan lainnya (11,86 mm). Sementara itu, kelangsungan hidup tidak dipengatuhi oleh perlakuan. Kata kunci: ikan betta, Betta splendens, Paramecium, Moina, Artemia, Tubifex, larva

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Sex Reversal on Congo Tetra Fish (Micraleptus intterruptus ) Larvae

Jurnal Akuakultur Indonesia ◽

10.19027/jai.1.69-74 ◽

2007 ◽

Vol 1 (2) ◽

pp. 69 ◽

Cited By ~ 1

Author(s):

Harton Arfah ◽

, Alimuddin ◽

K. Sumantadinata ◽

Julie Ekasari

Keyword(s):

Survival Rate ◽

Fish Larvae ◽

Sex Reversal ◽

The Other ◽

Fish Length ◽

Font Size ◽

Male Fish ◽

Other Hand ◽

Key Word ◽

Different Doses

ABSTRACT Experiment was performed to assess the effect of 17a-methyltestosterone (MT) treatment on Congo tetra fish larvae. To evaluate the optimal pattern of MT treatment, three different treatments were administrated. Three months old larvae were submerged in three different doses of MT; 1, 2 and 4 mg/l. These studies showed that the highest percentage of male fish was obtained by 4 mg/l MT treatment, 87,17%. The 2 mg/l and 1 mg/l MT treatments obtained 77,53% and 69,86% male respectively, two times higher than control, 38,96%. On the other hand, the 4 mg/l MT treatment also resulted the highest percentage of hermaphrodite fishes, 17,58%. The highest survival rate was shown by 1 mg/l MT treatment, 62,77% and the lowest was shown by the 4 mg/l MT treatment, 47,20%. The highest rate of fish length and weight was shown by the 4 mg/l MT treatment, 4,4 cm and 1,65 gram respectively. These findings suggest that MT treatment offers an advantage in growth of tetra Congo larvae. Key word : Sex reversal, methyltestosterone, Congo tetra fish, Micraleptus intterruptus. ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh perendaman larva di dalam larutan hormon 17a-metiltestosteron pada dosis 1, 2 dan 4 mg/l larutan. Persentase tertinggi ikan jantan dihasilkan oleh perlakuan 4 mg/l, yaitu 87,17%. Perlakuan 2 mg/l dan 1 mg/l masing-masing menghasilkan 77,53% dan 69,86% sedangkan kontrol menghasilkan 38,96% jantan. Efek lain dari perlakuan MT ini adalah hermafroditisme. Perlakuan 4 mg/l menghasilkan persentase hermafrodit tertinggi yaitu 17,58%, sedangkan pada kontrol kelangsungan hidup tertinggi diperoleh pada perlakuan 1 mg/l (62,77%) dan terendah pada perlakuan 4 mg/l (47,20%). Hasil tersebut menunjukkan adanya pengaruh dosis hormon terhadap kelangsungan hidup ikan. Pengukuran bobot dan panjang ikan pada setiap perlakuan menunjukkan nilai tertinggi dihasilkan oleh perlakuan 4 mg/l yaitu 1,65 gram dan 4,40 cm. Hal ini diduga bahwa hormon MT merangsang pula pertumbuhan ikan.Kata kunci : Pergantian kelamin, metiltestosteron, ikan tetra Kongo, Micraleptus intterruptus.

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Lepistes ve Japon Balığı Larvalarının Beslenmesinde Artemia sp.’ye Alternatif Olarak Mikrokapsül Yemin Kullanılması

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v7i10.1575-1580.2611 ◽

2019 ◽

Vol 7 (10) ◽

pp. 1575 ◽

Cited By ~ 1

Author(s):

Mahmut Yanar ◽

Çiğdem Çalım Akray ◽

Ece Evliyaoğlu ◽

Zeynep Erçen

Keyword(s):

Survival Rate ◽

Growth Performance ◽

Carassius Auratus ◽

Poecilia Reticulata ◽

Survival Rates ◽

The Other ◽

Growth And Survival ◽

Goldfish Carassius Auratus ◽

Other Hand ◽

Hand Length

In this study, the effects of Artemia sp. nauplii and micro capsulated feed on growth performance and survival rate of guppy (Poecilia reticulata) and goldfish (Carassius auratus) larvae were compared at the end of three weeks of rearing period. Length of goldfish larvae (4.82 mm) fed Artemia sp. (from 4 to 12/mL/day) were between 7.97 and 9.76 mm at the end of the trial while these values were between 6.80 and 7.21 mm for those fed microencapsulated feed (from 10 to 30 mg/L/day). On the other hand length of guppy larvae fed Artemia sp. (from 5 to 25/mL/day) were between 13.02 and 17.00 mm, whereas these values were remained between 11.98 and 12.38 mm for those fed microencapsulated feed (from 10 to 40 mg/L/day). A similar result was also observed in survival rates. Survival rate of goldfish larvae fed Artemia sp. were 88.91-97.61% in while those fed microencapsulated feed were 6.19-87.14%. On the other hand survival rate of guppy larvae fed Artemia sp. were 99.17-100.00% whereas those fed microencapsulated feed were 57.50-87.50%. Eventually, microencapsulated feed was not as successful as Artemia sp. on the growth and survival rate of larvae of both species.

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Pengaruh ketinggian air dalam pemeliharaan larva ikan hias botia (Chromobotia macracanthus, Bleeker)

Acta Aquatica Aquatic Sciences Journal ◽

10.29103/aa.v1i1.294 ◽

2014 ◽

Vol 1 (1) ◽

pp. 24 ◽

Cited By ~ 1

Author(s):

Maulina Sari ◽

Muhammad Hatta ◽

Asep Permana

Keyword(s):

Weight Gain ◽

Survival Rate ◽

Water Level ◽

Fish Larvae ◽

Quality Parameters ◽

Water Levels ◽

Average Weight ◽

Larval Rearing ◽

Growth And Survival ◽

Average Value

Penelitian ini bertujuan untuk mengetahui pengaruh ketinggian air yang berbeda terhadap pertumbuhan dan kelangsungan hidup larva ikan botia (Chromobotia macracanthus, Bleeker). Hasil penelitian menunjukkan bahwa sintasan atau kelangsungan hidup tertinggi terdapat pada perlakuan B dengan ketinggian air 10 cm yaitu sebesar 98.88%, sedangkan kelangsungan hidup terendah terdapat pada perlakuan A dengan ketinggian air 5 cm yaitu sebesar 97.99%. Pertambahan bobot nilai tertinggi terjadi pada perlakuan A dengan ketinggian air 5 cm dengan nilai bobot rata–rata 0.02252 gr dan pertambahan bobot rata–rata terendah terjadi pada perlakuan C dengan ketinggian air 15 cm yaitu sebesar 0.01132 gr. Pertambahan panjang rata–rata tertinggi terjadi pada perlakuan A yaitu sebesar 0.42 cm dan yang terendah terjadi pada perlakuan B yaitu sebesar 0.29 cm. Parameter kualitas air selama penelitian masih dalam kisaran optimal dimana suhu 24,3–28,9oC, pH 6,5–7,0, DO 6,84–7,69 ppm, NH3 0,00–0,03 ppm, NO2 0,00–0,07 ppm. Analisis statistik dengan uji F diperoleh bahwa ketinggian air yang berbeda dalam pemeliharaan larva ikan botia (C. macracanthus, Bleeker) berbeda sangat nyata (P>0.01) terhadap pertambahan bobot dengan nilai Fhitung (21.00) > Ftabel (10.92), dan berbeda sangat nyata terhadap pertambahan panjang dengan nilai Fhitung (23.56) > Ftabel (10.92), sedangkan untuk sintasan atau kelangsungan hidup tidak berbeda nyata antar perlakuan. Hasil uji BNT menunjukkan, setiap perlakuan memberikan pengaruh terhadap pertumbuhan dan tidak berpengaruh terhadap kelangsungan hidup.The study aims to determine the effect of different water levels on the growth and survival of fish larvae Botia (Chromobotia macracanthus, Bleeker). The results showed that the survival rate was highest in treatment B with the water level was 10 cm which was equal to 98.88 %, whereas the lowest survival rate was found in treatment A with the water level was 5 cm which was equal to 97.99 %. The highest value of weight gain occurred in treatment A with average value in weight was 0.02252 g and the average weight gain was lowest in the treatment of C that reached 0.01132 g. The highest growth of length was occured in treatment A that was equal to 0.42 cm and the lowest occurred in treatment B that was 0.29 cm. Water quality parameters during the study were in the tolerance range where the optimum temperature were 24,3-28,9 oC , pH 6.5 to 7.0, DO 6.84 to 7.69 ppm, NH3 0.00 to 0.03 ppm , NO2 0.00 to 0.07 ppm . Statistical analysis by F test showed that the different water levels in the larval rearing of fish Botia (C. macracanthus, Bleeker) was significantly different ( P > 0.01) in the weight gain with the value of Fcount ( 21.00 ) > Ftable ( 10.92 ), and it was significantly different against the length with the value of F count ( 23:56 ) > F table ( 10.92), while for the survival rate showed has not significantly different between treatments. The LSD test showed that all the treatment were effected the growth rate, but not for survival rate.

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The Effect of Different Thyroxine Hormone (T4) Concentration on The Growth, Survival, and Pigment Development of Pink Zebra Fish Larvae (Brachydanio reiro)

Omni-Akuatika ◽

10.20884/1.oa.2018.14.2.538 ◽

2018 ◽

Vol 14 (2) ◽

Author(s):

Arifianto Heraedi ◽

Slamet Budi Prayitno ◽

Tristiana Yuniarti

Keyword(s):

Growth Rate ◽

Survival Rate ◽

Specific Growth Rate ◽

Specific Growth ◽

Fish Larvae ◽

Average Length ◽

Average Weight ◽

Zebra Fish ◽

Total Length ◽

Absolute Growth

The thyroxin hormone plays an important role in the process of metabolism, yolk sac absorbsion, and growth of fish. The aims of this research were to observe the effect of various concentration of thyroxin (T4) on the absolute growth weight, total length, survival rate, and pigment development of pink zebra fish larvae (Brachydanio reiro ) after being reared 42 days. The pink zebra fish larvae at 4 day age with the average weight of 0,002 – 0,003g and average length of ± 3.10 – 3.43 mm were immersed at various concentration of T4 for 24 hours. Prior the treatment fish larvae were dipped into 1 ppt salinity for 2 minutes then transferred into 1 Liter, 1ppt saline and various T4 in plastic bags. The thyroxin concentrations were A (0 mg / L); B (0.05 mg / L); C (0.10 mg / L) and D (0.15 mg / L) respectively. The stocking density was 40 fish/L. After that they were transferred into aquariums and reared for 42 days. Completely Randomized Design (RAL) with four treatments and three replications were used. The variables observed were absolute and specific growth, total length, survival rate and hue degree. The results showed that the thyroxin hormone had significant effect on absolute growth weight, total length and specific growth rate. The dosage 0.1 mg/L was the best treatment on absolute growth, total length, and specific growth rate. Whilee the survival rate showed no significant differences across the treatments. Treatment C also demonstrated the best ppigment development (14.60 + 0.36º hue) compared to others.

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Free Amino Acid Enriched Rotifer for Larval Grouper Cromileptes altivelis (Pengkayaan Rotifer dengan Asam Amino Bebas Untuk Larva Kerapu Bebek Cromileptes altivelis)

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.20.4.207-214 ◽

2015 ◽

Vol 20 (4) ◽

pp. 207

Author(s):

Dedi Jusadi ◽

Tulas Aprilia ◽

Muhammad Agus Suprayudi ◽

Deddy Yaniharto

Keyword(s):

Amino Acids ◽

Amino Acid ◽

Survival Rate ◽

Free Amino Acid ◽

Free Amino ◽

Sea Water ◽

The Other ◽

Feeding Period ◽

Growth And Survival ◽

First Feeding

Pembenihan ikan kerapu dihadapkan pada rendahnya sintasan, terutama fase awal hidupnya. Rendahnya sintasan diduga berhubungan dengan belum berkembangnya organ pencernaan larva dan tidak tersedianya pakan yang siap diserap tubuh. Pemberian asam amino bebas seperti taurin dan glutamin melalui rotifer diharapkan dapat meningkatan ketersediaan nutrien yang dapat diserap dengan cepat oleh larva, sehingga sintasan larva tinggi dan dapat tumbuh lebih cepat. Penelitian bertujuan mengukur pengaruh glutamin atau taurin terhadap sintasan dan pertumbuhan larva kerapu bebek Cromileptes altivelis. Larva umur 1 hari (10 ekor.L-1) dipelihara dalam bak fiberglass volume 500 L yang diisi air laut sampai 330 L. Larva diberi pakan rotifer diperkaya 0,5 g glutamin, 0,5 g taurin, atau tanpa glutamin dan taurin. Larva dipelihara selama 16 hari dengan pemberian pakan 2 kali per hari. Satu jam setelah pemberian pakan dilakukan pengamatan terhadap jumlah rotifer dalam saluran pencernaan larva ikan. Hasil penelitian menunjukkan jumlah rotifer dalam saluran pencernaan larva meningkat seiring dengan bertambahnya umur. Namun, jumlah rata-rata rotifer yang dikonsumsi larva pada perlakuan 0,5 g glutamin atau 0,5 g taurin lebih banyak dibanding perlakuan tanpa taurin dan glutamin. Larva yang diberi rotifer hasil pengkayaan dengan 0,5 g glutamin atau 0,5 g taurin memiliki sintasan yang tidak berbeda (P>0,05), masing-masing 19,2±2,25%, dan 24,5±1,20%, dan secara signifikan lebih banyak dibanding larva di perlakuan tanpa glutamin dan taurin yang nilainya 13,0±1,70%. Larva yang diberi rotifer hasil pengkayaan dengan 0,5 g taurin secara signifikan lebih panjang (5,5±0,18 mm) dari ikan di perlakuan 0,5 g glutamin (5,3±0,12 mm). Demikian juga, larva di perlakuan glutamin lebih panjang dari pelakuan tanpa glutamin dan taurin (5,0±0,16 mm). Pengkayaan rotifer menggunakan asam amino bebas taurin atau glutamin dapat meningkatkan sintasan dan pertumbuhan larva kerapu bebek. Namun, taurin lebih baik dibanding glutamin karena memberi efek ke pertumbuhan ikan yang lebih cepat. Kata kunci: taurin, glutamin, kerapu bebek, Cromileptes altivelis. The hatchery production of grouper faced to the problem of low surival rate, especially during the first feeding period. During this period, the digestive organ of larvae was underdeveloped, and the nutrient in live food was not readily absorbed by larvae. Feeding on free amino acids, such as taurine or glutamine, enriched rotifer would be enhanced the nutrient readily absorbed thereby resulting to the improvement of growth and survival rate of larvae. A duplicate experiment was conducted to evaluate the effect of rotifer enriched with free amino acid of glutamine or taurine, on the growth and survival rate of larval grouper Cromileptes altivelis. One day old larvae were cultured in 500 l fiberglass containing 330 l of sea water with a density of 10 ind.L-1. Larvae were fed on rotifer enriched with either 0.5 g glutamine, 0.5 g taurine, or without glutamine nor taurine. Larvae were fed on rotifer twice a day at 08.00 and 14.00, and cultured for 16 days. One h after feeding, rotifer content in the gut of larvae were observed. Results showed that larvae fed on rotifer enriched with 0.5 g taurine or 0.5 g glutamie had higher rotifer content in the gut than that in the other group. Larvae fed on rotifer enriched with 0.5 g glutamine or 0.5 g taurine had the same survival rate (P>0.05), 19.2±2.25% and 24.5±1.20%, respectively; these values were significantly higher than that in the other group which was 13.0±1.70%. The total length of larvae fed on rotifer enriched with 0.5 g taurine (5.5±0.18 mm) significantly was the biggest compared than others; while those fed on rotifer enriched with 0.5 g glutamine (5.3±0.12 mm) was bigger than fish fed on rotifer without glutamine nor taurine (5.0±0.16 mm). Thus, it can be concluded that survival rate and growth of larvae were improved when feeding on rotifer enriched with taurine or glutamine. Nevertheless, taurine was more efective than glutamine due to its effect resulted the highest growth performance of larval grouper. Keywords: taurine, glutamine, grouper, Cromileptes altivelis

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On the study of the experience of the adult Tatar population

Kazan medical journal ◽

10.17816/kazmj58106 ◽

1930 ◽

Vol 26 (7) ◽

pp. 29-41

Author(s):

F. G. Mukhamedyarov

Keyword(s):

Survival Rate ◽

Population Group ◽

The Other ◽

Probability Of Survival ◽

Force Of Mortality ◽

Other Hand ◽

Age Related ◽

Complex Methods ◽

Related Mortality ◽

Sanitary State

Determining the survival rate of the population and the order of its extinction is one of the main tasks of social and hygienic examination, the sanitary characteristics of a particular region of a particular population group. Without these data, it is difficult to get a correct idea of the sanitary state of the study area. On the other hand, the study of the problem of experiencing is a rather difficult task and requires the use of complex methods. The essence of the method is to compare the numbers of the distribution by age of the deceased with the numbers of the distribution by age of the living and to obtain the probability of survival to the next age period. The probability of survival obtained in this way makes it possible to calculate the order of extinction of a non-existent (hypothetical) generation with age-related mortality equal to the force of mortality for the period of time for which the census took place.

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Relation B/W Stress, Nozzle Load and Total Length in a Process Piping Line

ASME 2010 Pressure Vessels and Piping Conference: Volume 3 ◽

10.1115/pvp2010-25213 ◽

2010 ◽

Author(s):

Javad Ozmaian ◽

Amir H. Farzaneh

Keyword(s):

Stress Analysis ◽

The Other ◽

Real Case ◽

Time Saving ◽

Total Length ◽

Other Hand ◽

Process Piping ◽

Process Plants ◽

The Times

Nowadays, time saving in piping stress analysis is a major concern among consultant engineering companies in power and process plants. In this paper, we are going to have a quantity review between some important parameters such as sustained, occasional and expanding stresses with total length and nozzle load of a real case according to ASME B31.3. Most of the times, piping stress designers try different and more flexible piping routes completely arbitrary. Longer piping route means greater mass, and it means a big trouble in earthquake time especially for allowable nozzle loading, on the other hand shorter piping route increases thermal nozzle loading and operating stresses. We will try to find a relationship among mentioned parameters to have an optimal piping route in order to save time and material. Finally, different routes will be analyzed using Caesar II to plot related parameters and find optimum criterion.

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PRIMEROS REGISTROS DE VARAMIENTOS DE LA BALLENA DE MINKE (Balaenopteridae: Balaenoptera acutorostrata) Y DEL DELFÍN CABEZA DE MELÓN (Delphinidae: Peponocephala electra), EN LA COSTA DE CAMPECHE, MÉXICO

Revista Mexicana de Mastozoologia ◽

10.22201/ie.20074484e.2018.1.1.249 ◽

2018 ◽

Vol 1 (1) ◽

pp. 18

Author(s):

Alberto Delgado-Estrella ◽

Karem Leonela Naranjo-Ruíz

Keyword(s):

Gulf Of Mexico ◽

Minke Whale ◽

The Other ◽

Balaenoptera Acutorostrata ◽

Total Length ◽

Other Hand ◽

The Town ◽

Aquatic Mammals

ResumenEn la costa de Campeche se puede encontrar aproximadamente el 30% de todos de mamíferos acuáticos documentados para el país; de estas especies, 13 son estrictamente marinas. La “ballena Minke” y la “peponocéfala o calderón pigmeo” han sido registradas en la parte norte del Golfo de México y para las costas de México son escasos los registros y más aún los varamientos vivos. Los días 4 y 5 de octubre de 2014 en el poblado de Champotón Campeche se varó viva una ballena Minke Balaenoptera acutorostrata. Su longitud total se estimó entre 4-5 m., asumiendo que se trataba de un subadulto, se regresó viva mar adentro. Por otra parte, del día 8 julio 2017 se varó una Peponocephala electra en Punta Xen, Champotón, Campeche. Se enterró en la playa de acuerdo con los procedimientos de profepa. Solo había registros previos de varamientos y avistamientos de estas dos especies en la parte norte del Golfo de México y el varamiento de una cría de B. acutorostrata en Celestún Yucatán, por lo que estos son los primeros registros para la costa de para ambas especies, lo cual es importante como contribución al acervo de diversidad de mamíferos acuáticos tanto para el estado como para el sur del Golfo de México.Palabras clave: Ballena Minke, Campeche, Peponocéfala, primeros registros, varamiento vivo.AbstractThe coast of Campeche registers approximately 30% of all aquatic mammals documented for Mexico; of these species, 13 are strictly marine. The “Minke whale” and the “Melon-Headed Whale” have been recorded in the northern part of the Gulf of Mexico and for the coasts of Mexico there are few records, including live stranded animals. On October 4th and 5th 2014, in the town of Champotón Campeche a subadult Minke whale Balaenoptera acutorostrata was found alive. Its total length was estimated between 4-5 m, and it was returned alive offshore. On the other hand, on July 8th , 2017, the stranding of a Peponocephala electra was recorded at Punta Xen, Municipality of Champoton, Campeche. The organism was buried on the beach in accordance with the profepa procedures. There were only previous records of strandings and sightings of these two species in the northern part of the Gulf of Mexico and one stranding of a B. acutorostrata calf in Celestún Yucatán, afterward these are the first records for the Campeche coast for both species, which is important as a contribution to the diversity of aquatic mammals for both the Campeche state and the southern Gulf of Mexico.Key words: Campeche, first records, live strandings, melon-headed whale, Minke whale.

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EFFECTS OF REPLACEMENT OF LIVE FOOD WITH DRY DIET ON GROWTH AND SURVIVAL RATE FOR SEABREAM (SPARUS AURATA) LARVAE

Egyptian Journal of Nutrition and Feeds ◽

10.21608/ejnf.2018.75749 ◽

2018 ◽

Vol 21 (2) ◽

pp. 573-581

Author(s):

A. Eid ◽

B. Ali ◽

A. Elghamry ◽

Faiza Salama ◽

Asmaa Abd El-Naby

Keyword(s):

Survival Rate ◽

Sparus Aurata ◽

Live Food ◽

Growth And Survival ◽

Dry Diet

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Effects of the Level and Frequency of Fertilization with hen Droppings on Zooplanktonic Density and Growth Performance of Common Carp Post-Larvae (CyprinusCarpio)

International Journal of Aquaculture Research and Development ◽

10.14302/issn.2691-6622.ijar-20-3490 ◽

2020 ◽

Vol 1 (2) ◽

pp. 13-21

Author(s):

Djikengoue Kameni Patricia Linda ◽

Mambe Tameghe Flora ◽

Kpoumie Nsangou Amidou ◽

Tonfack Achile Peguy

Keyword(s):

Survival Rate ◽

Growth Performance ◽

Common Carp ◽

The Other ◽

Other Hand ◽

Zooplankton Production

Zooplankton production and growth performance of post-larvae of common carp according to the level and frequency of fertilization with chicken droppings were studied between May and October 2017 at the IRAD pisciculture station in Foumban. To this end, two doses of hen droppings, namely 450 g/m3 (D450) and 600 g/m3 (D600), were each applied at two application frequencies (weekly (F2) and bimonthly (F1)). Thus, 1200 post-carp larvae were distributed in 12 identical concrete tanks (1.2m x 0.75m x 1m) each filled with 400 liters of water. The 2 doses applied at 2 frequencies were applied randomly in the 12 tanks in a complete random device comprising 3 treatments and 2 repetitions. Six days after fertilization, each tank was sown with zooplankton at a density of 7 individuals per liter (ind/l). The loading was carried out 12 days after fertilization at a density of 100 ind/m2. The results show that regardless of the dose and the frequency of droppings applied, the production of zooplankton was optimal 10 to 12 days after fertilization. Considering the growth performance, the tanks receiving the 600 g/m3 dose every 2 weeks presented the highest significant values (p <0.05). On the other hand, the survival rate (36% on average) was not significantly influenced (p˃0.05) by the dose and the frequency of fertilization. The 600 g/m3 dose applied every two weeks can be recommended for the rearing of post-larvae common carp.

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