scholarly journals First report of Trichodinella and new geographical records of trichodinids in Nile tilapia (Oreochromis niloticus) farmed in Brazil

2019 ◽  
Vol 28 (2) ◽  
pp. 229-237
Author(s):  
Fabrício Sado Rodrigues ◽  
Inácio Mateus Assane ◽  
Gustavo Moraes Ramos Valladão ◽  
Fernanda Gomes de Paula ◽  
Caniggia Lacerda Andrade ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
First Record ◽  
The Body ◽  
Western Region ◽  
Morphometric Characteristics ◽  
Fish Farms ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Protozoa Ciliophora ◽  
Serious Disease

Abstract Massive occurrence of trichodinids is frequently accompanied by serious disease in fish farms. In this study, trichodinid species from the gills and skin of Nile tilapia (Oreochromis niloticus) farmed in the central-western region of Brazil (state of Goiás) were morphologically characterized. Dried slides were prepared from the parasites and were impregnated with silver nitrate (2%). Morphometric characteristics were determined and schematic drawings of the denticles were made using photomicrographs produced from the slides. Seven species of trichodinid ectoparasites (Protozoa: Ciliophora: Trichodinidae) were found parasitizing the gills: four of the genus Trichodina Ehrenberg, 1838; one of Tripartiella Lom, 1959; one of Paratrichodina Lom, 1963; and one of Trichodinella Ṧrámek-Huṧek, 1953. On the body surface, three specimens of the genus Trichodina were identified. This study presents new geographical records of trichodinids in Brazil, thus confirming that Trichodina centrostrigeata, Trichodina compacta, Trichodina heterodentata, Paratrichodina africana and Tripartiella orthodens are widely distributed worldwide. Additionally, the first record of the genus Trichodinella in Brazil is presented.

scholarly journals Protozoan and metazoan parasites of Nile tilapia Oreochromis niloticus cultured in Brazil

2012 ◽  
pp. 2812-2819 ◽  
Author(s):  
Wanderson Pantoja MF ◽  
Ligia Neves R ◽  
Márcia Dias RD ◽  
Renata Marinho GB ◽  
Daniel Montagner ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Condition Factor ◽  
First Record ◽  
The State ◽  
Parasitic Infections ◽  
Fish Farms ◽  
Metazoan Parasites ◽  
Relative Condition Factor ◽  
Nile Tilapia Oreochromis Niloticus

ABSTRACTObjective. This study describes the parasitic fauna and relative condition factor (Kn) in Nile tilapia Oreochromis niloticus L. (Cichlidae) from fish farms in the State of Amapá. Material and methods. 123 fish from four fish farms in the state of Amapá, Brazil were necropsied for parasitological and Kn analysis. Results. 64.2% of the examined fish, had the gills infected with Cichlidogyrus tilapiae Paperna, 1960 (Monogenoidea: Dactylogyridae); Ichthyophthirius multifiliis Fouquet, 1876 (Protozoa: Ciliophora), Trichodina Ehrenberg, 1830 and Paratrichodina africana Kazubski & El-Tantawy, 1986 (Protozoa: Trichodinidae). The highest prevalence found corresponded to Monogenoidea C. tilapiae while the lowest corresponded to Trichodinidae. However, I. multifiliis was the parasite that presented the greatest intensity and abundance. The differences found in the infection rates of the different fish farms due to causes further discussed. The parasitism did not influence the relative condition factor (Kn) of fish. This was the first record of P. africana in Brazil and occurred in the Eastern Amazon. Conclusions. In Brazil, Lamproglena sp. is an emerging parasite in the Southern and Southeastern regions, but this crustacean was not found in the Nile tilapia in the State of Amapá. The parasitic infections in Nile tilapia farmed in Brazil are caused by protozoan, monogenoidea, crustacea and digenea species, and the regional differences on their prevalence and intensity rates are discussed in this study.

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 First record of the invasive Nile Tilapia, Oreochromis niloticus (Linnaeus, 1758) (Perciformes, Cichlidae), on Bawean Island, Indonesia

Check List ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 225-227
Author(s):  
Veryl Hasan ◽  
Muhammad Badrut Tamam
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Crater Lake ◽  
First Record ◽  
Morphometric Features ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Java Sea

In 2018 we captured specimens of Oreachromis niloticus (Linnaeus, 1758) from Danau Kastoba, a crater lake on Bawean (Indonesia), a small, isolated island in the Java Sea. Additional individuals were later photographed. These records are among first of this species from an isolated island, in the Java Sea. A description of meristic and morphometric features of a specimen are provided.

scholarly journals Identifying Nile tilapia strains and their hybrids farmed in Brazil using microsatellite markers

2016 ◽  
Vol 51 (10) ◽  
pp. 1744-1750 ◽  
Author(s):  
Rafael Antunes Baggio ◽  
Raphael Orélis-Ribeiro ◽  
Walter Antonio Boeger
Keyword(s):  
Oreochromis Niloticus ◽  
Bayesian Model ◽  
Nile Tilapia ◽  
Southern Brazil ◽  
Clustering Method ◽  
Fish Farms ◽  
Model Based Clustering ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Uruguay River ◽  
Reference Strains

Abstract: The objective of this work was to evaluate a Bayesian model-based clustering method to identify the strains of Nile tilapia (Oreochromis niloticus) individuals from fish farms in Southern Brazil. Assignment methods using nine microsatellite loci were applied to differentiate individuals of five reference strains (GIFT, GST, Nilótica, Chitralada, and Saint Peter) and to identify individuals of unknown strains from fish farms near the Itaipu reservoir and in the Uruguay River basin. The procedure assigned the correct strain in more than 90% of the cases and was also able to detect hybrids between strains. The obtained results showed that several fish farms in Southern Brazil cultivate more than one tilapia strain and even interstrain hybrids. The proposed methodology is a reliable tool for the identification of the strain origin of Nile tilapia individuals.

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