scholarly journals The effect of adding molasses in different times on performance of Nile tilapia (Oreochromis niloticus) raised in a low-salinity biofloc system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Hossein Khanjani ◽  
Morteza Alizadeh ◽  
Mohammad Mohammadi ◽  
Habib Sarsangi Aliabad
Keyword(s):  
Digestive Enzymes ◽  
Nile Tilapia ◽  
Stocking Density ◽  
The Body ◽  
Control Group ◽  
Survival Ratio ◽  
Hepatic Enzymes ◽  
Low Salinity ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Experimental Treatments

Abstract This study aimed to evaluate the effect of adding molasses in different times on water quality, growth performance, body biochemical composition, digestive and hepatic enzymes of Nile tilapia in the biofloc system. Tilapia fingerlings (1.53 ± 0.14 g) were distributed in five treatments include control, BFT24 (adding molasses to the tanks every 24 h), BFT48 (48 h), BFT72 (72 h), and BFT96 (96 h) and reared for 37 days in fiberglass tanks (130 L), with a stocking density of one fish per litre. The results showed that highest increase in biomass (740.12 g) and survival (98.97 %) were obtained in BFT24 treatment (P <0.05). The body composition was affected by the experimental treatments so that the highest protein content was obtained in the BFT72 (P<0.05). Digestive enzymes activities were significantly (P<0.05) higher in BFT treatments than the control group. The current study showed, higher biomass and survival ratio for Nile tilapia were observed in BFT24 treatment. The liver and digestive enzymes of Nile tilapia were affected by the different addition times of molasses to the rearing tanks.

scholarly journals ANALISIS KERAGAMAN BENTUK TUBUH IKAN NILA STRAIN GIFT PADA TIGA TINGKATAN UMUR YANG BERBEDA

2002 ◽  
Vol 4 (1) ◽  
pp. 19
Author(s):  
D. Ariyanto
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Oreochromis Niloticus ◽  
Genetic Improvement ◽  
Nile Tilapia ◽  
Body Shape ◽  
The Body ◽  
Analysis Method ◽  
Standard Measurement ◽  
Nile Tilapia Oreochromis Niloticus

A study aimed to identify morphology variability of nile tilapia (Oreochromis niloticus) strain GIFT (Genetic Improvement of Farmed Tilapia) by using standard measurement and multivariate analysis method was conducted. Elevan characters were measured at 141 fishes representing 3 levels of age (0-3 month, 3-6 month and more than 6 month) of nile tilapia strain GIFT. Multivariate analysis of variance (manova) and Pricipal Component Analysis (PCA) were applied to explore the morphological variability.The result showed that body shape of fry (0-3 month of age) was different from fishes with 3-6 month of age (consumption size), also from the broodstock. At the early level of age, development of the body shape was growth in width and length. At the consumption size and broodstock levels, the development of body shape was growth in fat too. 

scholarly journals Trichodina magna Van As and Basson, 1989 (Ciliophora: Peritrichia) from cultured Nile tilapia in the state of Santa Catarina, Brazil

2008 ◽  
Vol 68 (1) ◽  
pp. 169-172 ◽  
Author(s):  
ML. Martins ◽  
L. Ghiraldelli
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Original Description ◽  
The State ◽  
The Body ◽  
Fish Ponds ◽  
Santa Catarina ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Mean Diameter ◽  
The Mean

Specimens of Trichodina magna Van As and Bassson, 1989 (Ciliophora: Peritrichia) from the Nile tilapia Oreochromis niloticus collected from October 2004 to June 2005 in fish ponds situated in three regions of Santa Catarina State, Brazil are described here. Wet smears of skin and gills were prepared in the field, air dried, impregnated with Klein’s dry silver method and Giemsa’s solution. From a total of 146 examined fish, 36 were parasitized on the skin, 14 in the gills and 33 on the skin and gills, simultaneously. The mean diameter of the body of the specimens of T. magna was 84.3 ± 12.6 µm, adhesive disc 60.7 ± 10.0 µm, denticulate ring, 38.3 ± 7.4 µm, consisting of 26 (23 to 29) denticles. The only distinguishable difference from the original description was the fact that the ray of the denticle is anteriorly directed and does not extend over the y + 1 axis.

scholarly journals Nile tilapia fingerling cultivated in a low-salinity biofloc system at different stocking densities

2019 ◽  
Vol 16 (4) ◽  
pp. e0612 ◽  
Author(s):  
Priscilla C. M. Lima ◽  
Jéssika L. Abreu ◽  
Allyne E. M. Silva ◽  
William Severi ◽  
Alfredo O. Galvez ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Consumption ◽  
Nile Tilapia ◽  
Stocking Density ◽  
Experimental Period ◽  
Low Salinity ◽  
Final Weight ◽  
Negative Effect ◽  
Black Plastic ◽  
Formulated Feed

A 42-day trial was conducted to evaluate the effects of a low-salinity biofloc system with different stocking densities on water quality and zootechnical performance of Nile tilapia fingerlings (10 g/L). Four treatments were tested at different densities: 500 fish/m³, 750 fish/m³, 1,000 fish/m³ and 1,250 fish/m³, all in triplicate. Fingerlings of Oreochromis niloticus (initial mean weight of 1.17 ± 0.05 g) were stocked in twelve experimental black-plastic tanks (40 L) with no water exchange during the experimental period. Molasses was added daily to the system at 30% of the amount of feed, and fish were given four daily rations of a formulated feed composed of 36% crude protein and 9% lipids. Water quality variables (dissolved oxygen, pH, salinity, TAN, NO2, NO3 and PO43) did not demonstrate significant differences between the treatments. However, significant influences (α ≤ 0.05) of the stocking densities were observed for total suspended solids, settleable solids, final weight, yield, and protein efficiency ratio. The results showed survival over 96%, final weight values between 12 and 18 g, yield between 9.49 and 15.27 kg/m3, water consumption of 52 to 101 L/kg fish, and total time of settling chambers between 238 and 305 h/kg fish. These results indicate a negative effect of stocking density on final weight, survival, alkalinity, NO2, PO43 and water consumption, and a positive effect on yield in Nile tilapia fingerling culture (1-20 g) in a low-salinity biofloc system with densities up to 1000 fish/m³.

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