Reassessment of the suitable range of water pH for culture of Nile tilapia Oreochromis niloticus L. in eutrophic water

The present work aimed at reassessing the suitable range of water pH for culture of Nile tilapia, Oreochromis niloticus L. juveniles in eutrophic water. Two hundred and forty tilapia juveniles (1.37 ± 0.04 g) were stocked in twenty 250-L polyethylene tanks (12 fish per tank) for eight weeks. In the control tanks, the pH of water was not adjusted at any time, varying freely over the entire study. In the slight acidification treatment, the culture water was acidified daily to reach a water pH between 5.5 and 6.5. In the moderate acidification treatment, there were daily applications of HCl solution to reach a water pH between 4.5 and 5.5. In the alkalinization treatment, tanks received daily applications of Na2CO3 and NaOH to achieve a water pH between 8.5 and 9.5. Acidification of water, regardless the degree, i.e., slight or moderate, was not able to significantly affect final body weight, specific growth rate and yield of fish. It can be concluded that the acidification of water up to pH 5.5 has no negative influence on growth of Nile tilapia fingerlings in eutrophic tanks. Accordingly, the suitable range of water pH for rearing Nile tilapia should be set at 5.5 – 9.0.

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GIFT Nile tilapia Oreochromis niloticus fed on diet containing probiotic

Jurnal Akuakultur Indonesia ◽

10.19027/jai.12.106-112 ◽

2015 ◽

Vol 12 (2) ◽

pp. 106

Author(s):

Petrus Hari Tjahja Soedibya

Keyword(s):

Growth Rate ◽

Body Weight ◽

Specific Growth Rate ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Specific Growth ◽

Initial Body Weight ◽

Protein Retention ◽

Nile Tilapia Oreochromis Niloticus ◽

Meal Protein

ABSTRACT This research was conducted to evaluate the effect of the diet containing probiotic on Nile tilapia, Oreochromis niloticus. Fish with an initial body weight of 3.62±1.33 g were fed on diet supplemented with either 0%, 10%, 15%, 20% of probiotic. Results showed that fish fed on the diet supplemented with 15% of probiotic had the highest protein retention and specific growth rate, which were16.48±0.49% and 17.65±0.9%/day respectively. Keywords: probiotic, Azola meal, protein retention, specific growth rate ABSTRAK Penelitian ini bertujuan untuk mengevaluasi efek pemberian pakan mengandung probiotik pada ikan nila, Oreochromis niloticus. Ikan dengan bobot awal 3,62±1,33 g diberi pakan mengandung 0%, 10%, 15%, 20% probiotic. Hasil penelitian menunjukkan bahwa ikan yang diberi pakan mengandung 15% probiotik memiliki retensi protein dan laju pertumbuhan tertinggi masing-masing dengan nilai 16,48±0,49% dan 17,65±0,9%/ hari. Kata kunci: probiotik, tepung Azola, retensi protein, laju pertumbuhan harian

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Evaluation of Nile tilapia (Oreochromis niloticus) fingerlings exposed to the pesticide pyriproxyfen

Latin American Journal of Aquatic Research ◽

10.3856/vol48-issue5-fulltext-2556 ◽

2020 ◽

Vol 48 (5) ◽

pp. 826-835

Author(s):

Fabio Francisco Da Silva ◽

Jaqueline Maria Da Silva ◽

Themis De Jesus Da Silva ◽

Bruno Mendes Tenorio ◽

Fernanda Das Chagas Angelo Mendes Tenorio ◽

...

Keyword(s):

Oreochromis Niloticus ◽

Nile Tilapia ◽

Specific Growth ◽

Toxic Chemicals ◽

Hepatic Tissue ◽

Human Consumption ◽

Angular Variation ◽

Nile Tilapia Oreochromis Niloticus ◽

Effect Concentration ◽

Dose Dependent

Oreochromis niloticus (Nile tilapia) is one of the most produced fish for human consumption globally; however, these fish are susceptible to exposure to toxic chemicals in the water. Pyriproxyfen is a pesticide widely used to control mosquitoes in drinking water supplies and pests in crops. The present study aimed to examine pyriproxyfen's effects on fish O. niloticus fingerlings exposed using an acute 96 h and subchronic tests for 28 days. The lethal concentration LC50-96 h for O. niloticus was 2.77 mg L-1, no observed effect concentration (NOEC), and the lowest observed effect concentration (LOEC) was 1.0 and 2.5 mg L-1, respectively. The hepatic catalase activity was significantly changed after exposure to pyriproxyfen above 0.4 mg L-1. Pyriproxyfen also induced histopathological lesions in the hepatic tissue at 28 days in a dose-dependent pattern at concentrations above 0.4 mg L-1. Pyriproxyfen above 1.2 mg L-1 reduced the locomotor behavior, distance traveled inside the tank, mean speed, and angular variation. This pesticide also decreased weight gain, food conversion, and specific growth rate at concentrations above 1.2 mg L-1. In conclusion, exposure to pyriproxyfen in water from 0.4 mg L-1 may impair O. niloticus development; consequently, pyriproxyfen may affect this fish's production and quality at higher concentrations than commonly used in water (0.01 mg L-1).

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PENGARUH PENAMBAHAN GLISEROL PADA PAKAN TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP IKAN NILA (Oreochromis niloticus)

BERITA BIOLOGI ◽

10.14203/beritabiologi.v16i2.2833 ◽

2017 ◽

Vol 16 (2) ◽

Author(s):

Lusi Herawati Suryaningrum ◽

Mulyasari Mulyasari ◽

Reza Samsudin

Keyword(s):

Survival Rate ◽

Growth Performance ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Protein Efficiency Ratio ◽

Specific Growth ◽

Efficiency Ratio ◽

Experimental Diet ◽

Protein Retention ◽

Nile Tilapia Oreochromis Niloticus

The aim of this research was to determine the optimum percentage of glycerol addition into the diets of Nile Tilapia (Oreochromis niloticus) on growth performance, feed convertion ratio, and survival rate. The research was conducted using 15 aquaria with the size of 60 x 50 x 45 cm3, each containing 25 O. niloticus with average initial weight of 4.63 ± 0.15 g. The experiment was conducted using a complete random design with five treatments and three replications. Isonitrogenous (31%) and isocaloric (17 MJ.kg-1) diets were provided for 60 days of rearing period. Five diets were formulated with glycerol content of 0% (G0); 5% (G5); 10% (G10); 15% (G15), and 20% (G20). Fish were fed twice daily with experimental diet at satiation level. The result showed that addition of 10% glycerol in the diet (G10) presented the highest values for weight gain (105.85 ± 0.40%), specific growth rate (3.44 ± 0.01%), protein retention (27.75 ± 0.02%), protein efficiency ratio (2.53 ± 0.15%), lipid retention (60.44 ± 0.03%), and feed convertion ratio (1.59 ± 0.01%) (P < 0.05). Survival rate was not affected by dietary containing glycerol (P > 0.05). Therefore, addition of 10% glycerol into the diet gave a significant increase on growth performance and feed convertion ratio without adverse effect on survival rate of Nile Tilapia.

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Lab-scale periphyton-based system for fish culture

Ciência Rural ◽

10.1590/s0103-84782011005000146 ◽

2011 ◽

Vol 41 (12) ◽

pp. 2177-2182

Author(s):

Davi de Holanda Cavalcante ◽

Suzete Roberta da Silva ◽

Paloma Damasceno Pinheiro ◽

Ádila da Cunha Martins ◽

Marcelo Vinícius do Carmo e Sá

Keyword(s):

Water Quality ◽

Primary Productivity ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Fish Culture ◽

Scale Model ◽

Feeding Rates ◽

Final Body Weight ◽

Nile Tilapia Oreochromis Niloticus ◽

Feeding Regimes

The present research aimed to assess a lab-scale model to study periphyton-based systems for fish culture. Twenty-five liters plastic aquaria were stocked with three Nile tilapia, Oreochromis niloticus, juveniles (0.77±0.09g; 12 fish m-2) for 6 weeks in a 2x2 factorial design. Small plastic bottles were placed in some aquaria for periphyton development. Two feeding regimes were employed: "full-fed" (standard feeding rates were fully adopted) and "half-fed" (50% of standard feeding rates). Growth performance and limnological variables were observed in each aquarium. There werefive replicates per treatment. Fish have fed actively on periphyton, especially in the half-fed aquaria. The placement of periphyton bottles had no significant effects on the water quality variables, except by the gross primary productivity which became lower. Half-fed aquaria presented lower concentrations of ammonia (0.28-0.29mg L-1), nitrite (0.33-0.37mg L-1) and phosphorus (0.42-0.43mg L-1) than full-fed aquaria (0.57-0.60mg L-1; 0.75-0.77mg L-1; 0.67-0.70mg L-1, respectively). The final body weight of fish in half-fed aquaria with periphyton bottles (6.22±0.64g) was significantly higher than in aquaria without bottles (4.65±0.36g). Although the growth rate of fish was lower in the half-fed aquaria (4.27-4.72 vs. 5.29-5.61% BW day-1), survival was significantly higher when compared to the full-fed aquaria (93.3-100.0 vs. 80.0-83.4%). Only in the aquaria with periphyton the feed conversation ratio was improved by the feeding restriction regime.

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Melatonin Induced Changes in Specific Growth Rate, Gonadal Maturity, Lipid and Protein Production in Nile Tilapia Oreochromis niloticus (Linnaeus 1758)

Asian-Australasian Journal of Animal Sciences ◽

10.5713/ajas.2011.11139 ◽

2011 ◽

Vol 25 (1) ◽

pp. 37-43 ◽

Cited By ~ 13

Author(s):

Ruchi Singh ◽

A. K. Singh ◽

Madhu Tripathi

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Protein Production ◽

Specific Growth ◽

Gonadal Maturity ◽

Nile Tilapia Oreochromis Niloticus ◽

Induced Changes

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Characterization of Francisella noatunensis subsp. orientalis isolated from Nile tilapia Oreochromis niloticus farmed in Lake Yojoa, Honduras

Diseases of Aquatic Organisms ◽

10.3354/dao03333 ◽

2019 ◽

Vol 133 (2) ◽

pp. 141-145 ◽

Cited By ~ 2

Author(s):

E Soto ◽

K Shahin ◽

JJ Talhami ◽

MJ Griffin ◽

A Adams ◽

...

Keyword(s):

Oreochromis Niloticus ◽

Nile Tilapia ◽

Nile Tilapia Oreochromis Niloticus

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The effect of vaccination in controling bacterial disease caused by Aeromonas hydrophila in nile tilapia (Oreochromis niloticus)

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.0.0.2014.7302 ◽

2014 ◽

pp. 27

Author(s):

Arne A Ratulangi ◽

Reiny Tumbol ◽

Hengky Manoppo ◽

Henneke Pangkey

Keyword(s):

Survival Rate ◽

Aeromonas Hydrophila ◽

Oreochromis Niloticus ◽

Nile Tilapia ◽

Bacterial Disease ◽

Immersion Method ◽

Nile Tilapia Oreochromis Niloticus ◽

Different Ages ◽

Motile Aeromonas Septicaemia

This study aims to apply vaccination against bacterial disease. The purpose of vaccination is to trigger the immune respone both non-specific and specific of fish against bacteria Motile Aeromonas Septicaemia (MAS) caused by Aeromonas hydrophila. The vaccination for fish with different ages: 2-3 weeks and 5 weeks were done using immersion method. The fish were re-vaccinated (booster) after two weeks of the first vaccination. The survival rate was < 50 % for juveniles 2-3 weeks and > 50% for juveniles 5 weeks. Survival rate for juveniles 5 weeks was higher than juveniles of 2-3 weeks. This shows that organs of juveniles of 5 weeks were more complete than the 2-3 weeks juveniles. The age of fish is one of the important factors for successfully vaccination. Penelitian ini bertujuan untuk melakukan penerapan vaksinasi terhadap penyakit bakterial. Vaksinasi ditujukan untuk merangsang respon kekebalan non- spesifik dan spesifik pada tubuh ikan terhadap penyakit Motile Aeromonas Septicaemia (MAS) yang disebabkan oleh bakteri Aeromonas hydrophila. Vaksin diberikan pada benih ikan nila yang berbeda umur yaitu 2-3 minggu dan 5 minggu dengan menggunakan metode perendaman. Ikan divaksinasi ulang (booster) setelah 2 (dua) minggu dari vaksinasi yang pertama. Prosentase kelangsungan hidup < 50 % untuk benih umur 2-3 minggu dan > 50% untuk benih umur 5 minggu. Jumlah kematian benih umur 2-3 minggu lebih tinggi dari 5 minggu. Hal ini menunjukkan bahwa fungsi organ benih umur 5 minggu telah lebih lengkap dari pada benih umur 2-3 minggu. Umur ikan merupakan salah satu faktor penting penentu keberhasilan suatu kegiatan vaksinasi.

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