Preliminary study on the toxicological response of red tilapia ( Oreochromis niloticus ) on landfill leachate treated with Tin (IV) chloride and Jatropha curcas

Delonix regia is commonly called Flamboyant or flame of the forest. The seeds were fermented, boiled, sundried and then ground into powdered meal. 40% crude protein based test diets containing Delonix regia seed meal D0 = 0%; D15 = 15%; D20 = 20% and D25 = 25% inclusion levels respectively were prepared. Red tilapia (Oreochromis niloticus) fingerlings of 6 weeks old were acclimatized for two weeks and then stocked in 12 hapas at 15 fish per hapa measuring 0.6 m × 1.2 m × 0.7 m placed in a concrete tank. Each diet was assigned to fish in a separate hapa in triplicate and administered at 3% fish body weight per day for 16 weeks. Fish weight and length were taken initially, bi-weekly and terminally. Water quality was monitored weekly. Number of fish at the end was recorded and survival rate, growth, feed utilization, fillet yield and blood parameters were determined. The data were subjected to the analysis of variance and mean separation (P= 0.05). Survival rate was highest in fish raised on D20 and least in D25 without any significant difference across the range. Mean growth performances, feed utilization indices and fillet yield were generally congruent between D20 and D25 with varying degrees of significant difference to other feeds. Results of blood assay did not depict harmful effects of the test diets indicating that the fish enjoyed some good measures of health. The gross performance of fish on D20 was optimal. It was therefore concluded that 20% dietary inclusion level of fermented, cooked and dried flamboyant seed was the best for the red tilapia (Oreochromis niloticus) post fingerlings.

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Effects of salinity level on growth performance, feed utilization, and chromatic deformity of the hybrid Red tilapia, Oreochromis niloticus x O. mossambicus

Egyptian Journal of Aquatic Biology and Fisheries ◽

10.21608/ejabf.2021.158248 ◽

2021 ◽

Vol 25 (2) ◽

pp. 49-61

Author(s):

Sayed A. Nassar ◽

Abeer G. A. Hassan ◽

Mohamed F. Badran ◽

Mohamed M. Abdel-Rahim

Keyword(s):

Growth Performance ◽

Oreochromis Niloticus ◽

Feed Utilization ◽

Salinity Level ◽

Red Tilapia

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Optimal Replacement of Soybean Meal with Fermented Palm Kernel Meal as Protein Source in a Fish Meal-Soybean Meal-Based Diet of Sex Reversed Red Tilapia (Oreochromis niloticus × O. mossambicus)

Animals ◽

10.3390/ani11082287 ◽

2021 ◽

Vol 11 (8) ◽

pp. 2287

Author(s):

Wattana Wattanakul ◽

Karun Thongprajukaew ◽

Waraporn Hahor ◽

Naraid Suanyuk

Keyword(s):

Soybean Meal ◽

Oreochromis Niloticus ◽

Fish Meal ◽

Palm Kernel ◽

Carcass Composition ◽

Protein Source ◽

Crude Lipid ◽

Red Tilapia ◽

Kernel Meal ◽

Palm Kernel Meal

The solid-state fermentation by effective microorganisms (containing photosynthetic bacteria, lactic acid bacteria, nitrogen-fixing bacteria, yeast and Bacillus sp.) improved the nutritive values of palm kernel meal (PKM). Increased crude protein (20.79%), nitrogen-free extract (40.07%) and gross energy (19.58%) were observed in fermented PKM (FPKM) relative to raw PKM while crude lipid (15.65%), crude fiber (36.45%) and ash (29.54%) were decreased. Replacement of soybean meal (SBM) with FPKM as a protein source was investigated for its effects in sex-reversed red tilapia (Oreochromis niloticus × O. mossambicus). The two-month-old fish (14.85 ± 0.28 g initial weight) were fed fish meal-SBM-based diets with replacement by FPKM at 25% (25FPKM), 50% (50FPKM), 75% (75FPKM) and 100% (100FPKM), while an FPKM-free diet (0FPKM) was used as a control. The five treatments, comprising triplicate cement ponds and forty fish each, were conducted in a recirculating system over 12 weeks. At the end of the feeding trial, fish fed the 50FPKM diet were superior in growth performance, while the feed utilization parameters were similar across all five treatments. Physiological adaptation of the protein-digesting (pepsin and trypsin) and lipid-digesting (lipase) enzymes was detected at all protein replacement levels (except for 25FPKM), as well as of the enzyme for cellulose digestion (cellulase), but not of the carbohydrate-digesting enzymes (amylase). Protein synthesis capacity in flesh was improved in fish fed the 50FPKM diet, while the quality of the main flesh proteins, actin and myosin, showed no significant differences across the five treatments. No differences in carcass composition and no negative effects on hematological parameters or liver histoarchitecture at the 50% replacement level of SBM by FPKM also support this alternative. Findings from the current study indicate the low-cost FPKM-containing diet for tilapia in comparison with control diet.

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Apparent Digestibility Coefficients of Pelleted Feed Incorporated with Water Hyacinth Echhornia crassipes Fed to Red Tilapia, [Oreochromis mossambicus (Peters, 1852) X Oreochromis niloticus (Linnaeus, 1758)]

Agricultural Journal ◽

10.3923/aj.2011.322.326 ◽

2011 ◽

Vol 6 (6) ◽

pp. 322-326

Author(s):

E.A.T. Mubarak ◽

M.A. Amiza ◽

H.K. Bakhsh ◽

A.B. Abol-Munaf

Keyword(s):

Oreochromis Niloticus ◽

Water Hyacinth ◽

Oreochromis Mossambicus ◽

Apparent Digestibility ◽

Red Tilapia ◽

Pelleted Feed

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Effect of Red tilapia (Oreochromis mossambicus × Oreochromis niloticus) on growth and survival of the pacific shrimp (Litopenaeus vannamei) in simultaneous polyculture under marine conditions//Efecto de la tilapia roja (Oreochromis mossambicus × Oreochromis niloticus) en el crecimiento y supervivencia del camarón (Litopenaeus vannamei) en policultivo simultáneo bajo condiciones marinas

Biotecnia ◽

10.18633/biotecnia.v22i2.1237 ◽

2020 ◽

Vol 22 (2) ◽

pp. 5-12

Author(s):

Alejandro Mcdonal-Vera ◽

Wilfrido M. Contreras-Sánchez ◽

Neil J. Duncan ◽

Kevin Fitzsimmons ◽

Maria J. Contreras- García ◽

...

Keyword(s):

Litopenaeus Vannamei ◽

Oreochromis Niloticus ◽

Oreochromis Mossambicus ◽

Pacific White Shrimp ◽

White Shrimp ◽

Average Weight ◽

Growth And Survival ◽

Red Tilapia ◽

The Pacific ◽

The Mean

In the present investigation, we evaluated if the presence of tilapia affects growth and survival of shrimp during pre-growth and grow-out phases. In both experiments, we used a random-blocks design in a single earth pond (0.75 ha) that was prepared and divided into nine (7 x 30 m) enclosures that were considered to be three blocks of three enclosures each. Each randomly stocked block consisted on Pacific white shrimp Litopenaeus vannamei (30 shrimp/m2) and three different densities (0.0, 0.25 and 0.50 fish/m2) of red tilapia hybrids (Oreochromis mossambicus x Oreochromis niloticus) to give three different treatments with three replicates. The results from the pre-growth and grow-out experiments followed the same trend. In both cases, we found no significant statistical differences (P>0.05) in the final average weight of the shrimp. However, the experimental blocks had a significant (P<0.05) effect on the mean sample weight of shrimp. Shrimp in blocks B and C were significantly bigger than shrimp from block A (P<0.05). For both experiments, we found no effect of the presence of tilapias on survival or growth of shrimp.RESUMENEvaluamos si la presencia de tilapias libres afecta el crecimiento y la supervivencia de camarones en fase de preengorda y engorda. Para ambos experimentos, utilizamos un diseño de bloques al azar en un estanque rústico (0.75 ha) que fue preparado y dividido en nueve encierros (7 x 30 m), se formaron tres bloques con tres encierros cada uno. Cada encierro dentro de cada bloque fue aleatoriamente seleccionado para sembrar camarón blanco del Pacífico, Litopenaeus vannamei (30 camarones/m2) y tres diferentes densidades (0.0, 0.25 y 0.50 peces/m2) de híbrido de tilapia roja (Oreochromis mossambicus x Oreochromis niloticus) para formar tres tratamientos con tres réplicas. Los resultados del experimento de pre-engorda y engorda siguieron la misma tendencia. En ambos experimentos no encontramos diferencias estadísticamente en el crecimiento de los camarones ni en las tilapias. Sin embargo, los bloques experimentales presentaron diferencias significativas (P<0.05) en el peso promedio final. Los camarones de los bloques B y C fueron estadísticamente más grandes (P<0.05) que los del bloque A. Para las dos etapas de crecimiento de los camarones, no se observó un efecto de la presencia de tilapias sobre la sobrevivencia o crecimiento de los camarones.

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