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1

Taxonomic assessment of three North American Trichodinids by reevaluating the taxon validity of Trichodina heterodentata Duncan, 1977 (Peritrichia)

100%
Jager G. P., Basson L.
Acta Protozoologica
|
2019
|
tom 58
|
nr 3
2

Accumulation and prediction of lead elimination in Oreochromis mossambicus as a function of body size

63%
James R., Sampath K., Alagurathinam S.
Acta Hydrobiologica
|
1994
|
tom 36
|
nr 1
115-124
Lead accumulation in the gill, liver, and muscle of O. mossambicus was time and dose dependent but descreased with body size. During recovery, the large size group eliminated the metal faster than the small size one. Animals exposed to higher concentration of metal needed longer time for recovery.
3

Inhibition of luminous Vibrio harveyi by "green water" obtained from tank culture of tilapia, Oreochromis mossambicus

51%
Huervana F. H., De La Cruz J. J. Y., Caipang C. M. A.
Acta Ichthyologica et Piscatoria
|
2006
|
tom 36
|
nr 1
Background. Luminous vibriosis caused by Vibrio harveyi, is a serious disease problem in shrimp aquaculture. The use of "green water", a technique that involves the stocking of tilapia, Oreochromis in the reservoir for the production of green microalgae, Chlorella is believed to help in the reduction of the incidence of luminous vibriosis. Though most shrimp farmers have been using Mozambique tilapia, Oreochromis mossambicus for the production of "green water", the mechanism involved in the efficiency of using this fish species in reducing luminous vibriosis remains unknown and is largely based on speculations. It was for this reason that the present experiment was conducted. The aim of the study was to determine the antibacterial activity of "green water" obtained from tank culture of Oreochromis mossambicus against Vibrio harveyi under laboratory conditions. Materials and Methods. "Green water" collected from broodstock and juvenile tanks of Oreochromis mossambicus as well as water from a commercial shrimp pond, and filtered boiled seawater were inoculated with Vibrio harveyi. Luminous bacteria were counted in nutrient agar, while presumptive and green colony-forming vibrios were determined on thiosulfate-citrate bile salt (TCBS). The experiment was carried out for one week. Results. Luminous bacteria were not detected, and the presumptive and the green colony-forming vibrios were generally lowest in "green water" obtained from the broodstock tank. Luminous bacteria in "green water" obtained from juvenile tank were not detected starting day 5, indicating delayed inhibition. Conclusion. The present findings show that "green water" from broodstock tank of O. mossambicus has the ability to inhibit luminous vibriosis over a one-week period, and that broodstock are a better source of "green water" than juveniles in controlling luminous vibriosis.
4

Architectural pattern of the mucosal epithelium of the alimentary canal of Notopterus notopterus [Pallas] and Oreochromis mossambicus [Paters]: a comparative study

51%
Mandal D. K., Chakrabarti P.
Acta Ichthyologica et Piscatoria
|
1996
|
tom 26
|
nr 1
15-23
The stratified epithelial cells of the buccopharynx and oesophagus are provided with simple and unbranched microridges in Notopterus notopterus. On the contrary, highly complex microridges on the epithelial cells of buccopharynx and oesophagus are characteristic feature of Orenchromis mossambicus. In both the fishes the gastric mucosa is provided with various minor folds forming empty concavities. The concavities are comparatively deeper in N. notoprerus. In the intestine of N. notopterus the mucosal folds are comparatively thinner and simpler than O. mossambicus. However, the presence of highly compact and slender microvilli of the columnar epithelial cells in the intestine of N. notopterus is the characteristic feature of a short gut. The complex arrangement of: mucosal folds forming irregular pockets in the luminal wall of the rectum in N. notopterus permits the greater elasticity for accommodating the undigested food. On the other hand, in O. mossambicus the mucosal folds are comparatively thinner.
5

Gyrodactylids [Gyrodactylidae, Monogenea] infecting Oreochromis niloticus niloticus [L.] and O. mossambicus [Peters] [Cichlidae]: A pan-global survey

51%
Garcia-Vasquez A., Hansen H., Christison K. W., Rubio-Godoy M., Bron J. E., Shinn A. P.
Acta Parasitologica
|
2010
|
tom 55
|
nr 3
215-229
Gyrodactylus infections in intensively-reared populations of Nile tilapia, Oreochromis niloticus niloticus, have been associated world-wide with high mortalities of juvenile fish. In this study, 26 populations of Gyrodactylus parasitising either O. n. niloticus or Mozambique tilapia, Oreochromis mossambicus, were sampled from fourteen countries and compared with type material of Gyrodactylus cichlidarum Paperna, 1968, Gyrodactylus niloticus (syn. of G. cichlidarum) and Gyrodactylus shariffi Cone, Arthur et Bondad-Reantaso, 1995. Representative specimens from each population were bisected, each half being used for morphological and molecular analyses. Principal component analyses (PCA) identified five distinct clusters: (1) a cluster representing G. cichlidarum collected from O. n. niloticus from 13 countries; (2) the G. shariffi paratype; (3) three specimens with pronounced ventral bar processes collected from two populations of Mexican O. n. niloticus (Gyrodactylus sp. 1); (4) four specimens collected from an Ethiopian population nominally identified as O. n. niloticus (Gyrodactylus sp. 2); (5) nine gyrodactylids from South African O. mossambicus (Gyrodactylus sp. 3). Molecular analyses comparing the sequence of the ribosomal transcribed spacer regions (ITS 1 and 2) and the 5.8S gene from the non-hook bearing half of worms representative for each population and for each cluster of parasites, confirmed the presence of G. cichlidarum in most samples analysed. Molecular data also confirmed that the DNA sequence of Gyrodactylus sp. 2 and Gyrodactylus sp. 3 (the morphologically-cryptic group of South African specimens from O. mossambicus) differed from that of G. cichlidarum and therefore represent new species; no sequences were obtained from Gyrodactylus sp. 1. The current study demonstrates that G. cichlidarum is the dominant species infecting O. n. niloticus, being found in 13 of the 15 countries sampled.
6

Description of three new species of Gyrodactylus von Nordmann, 1832 (Monogenea) parasitising Oreochromis niloticus niloticus (L.) and O. mossambicus (Peters) (Cichlidae)

51%
Garcia-Vasquez A., Hansen H., Christison K. W., Bron J. E., Shinn A. P.
Acta Parasitologica
|
2011
|
tom 56
|
nr 1
One previously described and 1 new species of Nanotrema Paperna, 1969 are reported from the gills of Citharinus citharus citharus (Citharinidae) collected from the Niokolo Koba River, Senegal. Nanotrema citharini Paperna, 1969 is redescribed, based on the re-examination of the type specimens and new information obtained from material taken in Senegal (new locality record). Nanotrema niokoloensis sp. nov. is distinguished primarily by possessing a copulatory organ composed of a long thin tube with median portion usually coiled into about 2.5 rings and an accessory piece resembling a braid lying within the rings. Based on the presence of the dorsal anchors modified into paired haptoral spikes, which lack an associated bar, species of Nanotrema phenotypically appear to be related to those of Neotropical Rhinoxenus Kritsky, Boeger et Thatcher, 1988 and Indian Spicocleidus Agrawal, Tripathi et Shukla, 2005.
7

Effect of EDTA on reduction of cadmium level in water and improvement of haematological parameters in Oreochromis mossambicus [Peters]

51%
James R., Sampath K.
Acta Hydrobiologica
|
1999
|
tom 41
|
nr 1
8

Znane - malo znane - nie znane - zapomniane

51%
Magazyn Aqua
|
1998
|
nr 19
44
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