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| Registros recuperados: 20 | |
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| De Verdal, Hugues; O'Connell, Catherine Maeve; Mekkawy, Wagdy; Vandeputte, Marc; Chatain, Beatrice; Bégout, Marie-laure; Benzie, John A.h.. |
| Given the strong effects of behavioural hierarchies on growth in many cultured species and the key role of feed efficiency in aquaculture economics, understanding the nature of the interaction of these variables is important for the sustainability of aquaculture. The relationship between agonistic behaviour, growth and feed efficiency in Nile tilapia, Oreochromis niloticus, was studied by rearing 120 fish in eight aquaria. Fish were video-recorded to estimate the occurrence of agonistic behaviour during a fasting and a refeeding period. Growth, feed intake and feed conversion efficiency (FCE - calculated as the inverse of feed conversion ratio (FCR)) were subsequently measured individually for each fish. Fish showed 58% less agonistic traits during the... |
| Tipo: Text |
Palavras-chave: Agonstic behaviour; Feed efficiency; Nile tilapia; Performances; Correlation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00483/59495/62363.pdf |
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| Sakita,G.Z.; Meira,D.C.; Bremer Neto,H.; Cyrino,J.E.P.; Abdalla,A.L.. |
| The aim of this study was to evaluate the rate absorption of radio-labeled chromium oxide (51Cr2O3), used as biological marker in nutrition studies with Nile tilapia Oreochromis niloticus. An experimental diet with approximately 58 µCi of specific activity of the element was encapsulated and fed daily to 35 adult Nile tilapia; a group of 35 fish was used as control feeding on a basal diet. At the beginning of the experiment five fish from each group were randomly selected and blood samples were drawn from control (BC) and experimental fish (BE). Fish were then euthanized by anesthetic overdoses and samples of the liver tissue (LT), renal tissue (RT), stomach without content (S), intestine without content (I), gills tissue (GT), muscle tissue (fillet; MT),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nile tilapia; Oreochromis niloticus; Absorption; Digestibility; Nutrition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300755 |
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| Montoya-Mejía,Magnolia; García-Ulloa,Manuel; Hernández-Llamas,Alfredo; Nolasco-Soria,Hector; Rodríguez-González,Hervey. |
| ABSTRACT In this work, we studied the digestibility, growth, blood chemistry, and enzyme activity of Nile tilapia (Oreochromis niloticus) juveniles (0.95±0.18 g) using different animal (fish silage meal, whey meal, bovine blood meal, and red crab meal) and plant (extruded bean, extruded chickpea meal, coconut paste, Jatropha curcas meal, and chickpea meal) dietary byproducts. Nine isocaloric diets (321.92±9.10 kcal g−1) were evaluated for 60 days. The highest digestibility of crude protein values for animal and plant sources were obtained for the whey (93.6) and extruded bean meal (90.5) diets, respectively. The final body weight was higher for the red crab and extruded chickpea meal diets, meanwhile the fish silage and red crab byproducts obtained the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative byproducts; Digestive response; Formulated diets; Growth performance; Nile tilapia; Physiology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001200873 |
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| Shalaby,A. M.; Khattab,Y. A.; Abdel Rahman,A. M.. |
| We studied and compared the effects of chloramphenicol antibiotic and garlic (Allium sativum), used as immunostimulants and growth promoters, on some physiological parameters, growth performance, survival rate, and bacteriological characteristics of Nile tilapia (Oreochromis niloticus). Fish (7±1g/fish) were assigned to eight treatments, with three replicates each. Treatment groups had a different level of Allium sativum (10, 20, 30, and 40g/kg diet) and chloramphenicol (15, 30, and 45mg/kg diet) added to their diets; the control group diet was free from garlic and antibiotic. Diets also contained 32% crude protein (CP) and were administered at a rate of 3% live body weight twice daily for 90 days. Results showed that the final weight and specific growth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum; Chloramphenicol; Nile tilapia; Growth parameter; Hematology; Biochemistry; Aeromonas hydrophila. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000200003 |
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| De Verdal, Hugues; Vandeputte, Marc; Pepey, Elodie; Vidal, Marie-odile; Ouedraogo, C; Canonne, Marc; D'Cotta, Helena; Baroiller, Jean Francois; Baras, E; Chatain, Beatrice. |
| The present study aimed to develop nondestructive methods to accurately follow the growth of fish larvae and post-larvae. European sea bass (Dicentrarchus labrax) aged 71-100 days post fertilization (dpf; 20-419 mg) and Nile tilapia (Oreochromis niloticus) aged 14 dpf (10-25 mg) were used as model species. Several measurements were performed on digital pictures of larvae to model body weight. Using body surface area, contour, length and depth, it was possible to estimate accurately the body weight of young European sea bass and Nile tilapia (r² of 0.98 and 0.95, respectively). |
| Tipo: Text |
Palavras-chave: Image analysis; Body weight; Surface area; European sea bass; Nile tilapia. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00205/31619/30045.pdf |
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| Neves,Patrícia Ribeiro; Ribeiro,Ricardo Pereira; Vargas,Lauro; Natali,Maria Raquel Marçal; Maehana,Káttia Regina; Marengoni,Nilton Garcia. |
| The aim of this study was to evaluate the productive performance of two strains of Nile tilapia (Oreochromis niloticus) in mixed raising systems. A total of 3600 fish-larvae species was used, 1800 belonging to Bouaké lineage, and 1800 to Chitralada. The experiment was carried out in three phases; Phase I in an incubator in 18 boxes, in which two treatments (Bouaké and Chitralada) were tested by using nine repetitions; Phases II and III were performed in 18 cement tanks with the same treatments. In phase I, regarding the final weight and gain of weight, Chitralada strain showed the highest final weight values. In phase II, Chitralada showed the highest final weight value when compared with Bouaké, and, considering the gain of weight, Bouaké obtained the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Performance; Strains; Oreochromis niloticus; Reproduction; Nile tilapia. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300012 |
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| Wasko,Adriane P.; Severino,Fábio E.; Presti,Flávia T.; Poletto,Andréia B.; Martins,Cesar. |
| An alpha actin gene segment, isolated from Nile tilapia (Oreochromis niloticus), was characterized by nucleotide sequencing, predicted amino acid sequence and Southern blot hybridization. Genomic DNA amplification resulted in a 1063-bp fragment corresponding to a partial alpha-cardiac muscle actin gene containing exons 3 to 6. Southern blot analysis of the restriction-digested DNA revealed that the Nile tilapia genome contains multiple muscle actin isoforms. Although comparison of the nucleotide sequence, amino acid residues and exon-intron organization of the isolated actin gene with those of other vertebrates showed a high level of identity, diagnostic amino acid residues can still be correlated to distinct actin genes in fish species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actin gene; Amino acid residues; Gene structure; Nile tilapia; Nucleotide sequence; Oreochromis niloticus. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600010 |
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| Mckenzie, David; Blasco, Felipe R.; Belao, Thiago C.; Killen, Shaun S.; Martins, Nathan D.; Taylor, Edwin W.; Tadeu Rantin, F.. |
| Individual variation in sub-lethal sensitivity to the organophosphate pesticide trichlorfon was investigated in Nile tilapia, using critical swimming speed (U-crit) as an indicator. Tilapia exposed for 96 h to 500 mu g l-1 trichlorfon at 26 degrees C (Tcfn group, n = 27) showed a significant decline in mean U-crit, compared to their own control (pre-exposure) performance in clean water (-14.5 +/- 2.3%, mean +/- SEM), but also compared to a Sham group (n = 10) maintained for 96 h in clean water. Individuals varied in their relative sensitivity to the pesticide, with the decline in U-crit after exposure varying from 1 to 41%. The U-crit of the Tcfn group did not recover completely after 96 h in clean water, remaining 9.4 +/- 3.2% below their own control... |
| Tipo: Text |
Palavras-chave: Trichlorfon; Critical swimming speed; Metabolic rate; Respirometry; Nile tilapia; Individual variation. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00625/73705/74889.pdf |
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| Barreto,R.E.; Moreira,P.S.A.; Carvalho,R.F.. |
| Female Nile tilapia incubate fertilized eggs in their mouth until they are released as alevins. Consequently, the female may not eat during this period. Thus, it would be expected that female Nile tilapia are more adapted to recovering from fasting than males, which do not display this behavior. To test this hypothesis we conducted an experiment with two groups of fish consisting of 7 males and 7 females each, with one fish per aquarium. The experiment was divided into three phases involving adjustment of the animals to experimental aquaria (0-15th day), fasting (16th-27th day), and refeeding (27th-42nd day). Compensatory growth performance was assessed by specific growth rate, weight, food conversion efficiency and food intake. Food conversion efficiency... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compensatory growth; Fasting; Sex-related growth; Mouthbrooding fish; Nile tilapia; Oreochromis niloticus. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000400009 |
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| FIUZA,TATIANA S; SILVA,PAULO C; PAULA,JOSÉ R; TRESVENZOL,LEONICE M F; SABÓIA-MORAIS,SIMONE M T. |
| Hyptidendron canum (Pohl ex Benth.) Harley is a native tree of the Brazilian Savannah. The fish Oreochromis niloticus L. was used as an experimental model to determine the bioactivity of the crude ethanol extract as well as ethyl acetate, hexanic and chloroform fractions obtained from its leaves. The plant ethanol extract and fractions were administered to the fish orally with their feed. Twenty four hours later, the fish were sacrificed and their livers dissected, fixed in neutral formalin, embedded in paraffin and sectioned. Histological analyses were performed using Masson's trichrome and Haematoxylin-Eosin. Histochemical studies were performed using Feulgen, PAS (Periodic Acid Schiff) and PAS + salivary amylase and Sudan IV stain. The qualitative... |
| Tipo: Journal article |
Palavras-chave: Fish; Nile tilapia; Savannah biome; Vasodilation. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200003 |
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| Wassermann,Gustavo Javier; Afonso,Luís Orlando Bertolla. |
| In this study a method for evaluating phenotypic sex in Nile tilapia was validated. A technique that uses aceto-carmine squash mounts to stain the entire gonadal tissue for microscopic examination (Method 2- squash mounts) was compared with a technique based on traditional histology. Approximately 2600 Nile tilapia fry weighing and measuring, respectively, between 0.25-2.50g and 26-53mm, aged 35 to 60 days after hatch (DAH), were sexed using this methodology. In situ microscopic examination on the gonads was also performed. A reliable sexing using squash mount was possible with fish weighing more than 0.500g, 45-47 DAH. Results from microscopic observation using the aceto-carmine stain coincided 100% with the histological examination. Male gonadal tissue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sex evaluation; Nile tilapia. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000100023 |
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| Suthip Khakong; Khunnitee Leelarasamee; Atchariya Suwannasang; Nirut Sukkasem. |
| Studies of using mangosteen leaf extract, which contains active compounds similar to steroid hormones, on sex-reversal in Nile tilapia (Oreochromis niloticus) were conducted in 2 experiments; 1) incubating of early-stage eggs in water containing mangosteen leaf extract at concentrations of 0, 1, 2.5, and 5 g of mangosteen leaves/l for 7 days, 2) nursing of fry aged 2-day after yolk sac absorption in water containing mangosteen leaf extract at concentrations of 0, 1, 2, and 3 g of mangosteen leaf/l for 28 days The results shown that, eggs were unable to hatch in water containing mangosteen leaf extracts the concentration of 5 g/l. Also the fry was unable to survive in water containing mangosteen leaves extracts at concentrations of 3 g/l. As for the rest,... |
| Tipo: Collection |
Palavras-chave: Nile tilapia; Mangosteen leaf; Sex-reversal; ปลานิล; เพศผู้; ใบมังคุด; การแปลงเพศ; สารสกัด; การอนุบาลลูกปลา; อัตราการรอดตาย; ต้นทุนการผลิต. |
| Ano: 2011 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5168 |
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| Registros recuperados: 20 | |
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