scholarly journals Anew Finding of Allocreadium Isoproum (Looss, 1902) (Digenea Allocreadinae) Parasite of the Stomach of Freshwater Fishes Tetraodon Fahaka from Jebel Aulia Dam Southern Khartoum, Sudan

2017 ◽  
Vol 2 (2) ◽  
pp. 142
Author(s):  
Eshraga Dafa Alla Mahmoud ◽  
Saadia Ahemed Youins ◽  
Ahmed Mohammed Musa ◽  
Abdlgader Mahammed Ahmed
Keyword(s):  
South America ◽  
Freshwater Fish ◽  
Prevalence Rate ◽  
Freshwater Fishes ◽  
First Report ◽  
First Finding ◽  
White Nile

<em>A species of Allocreadinae (Trematoda, Digenea) was found in the stomach of freshwater fish </em><em>“Tambar’’ Tetraodon fahaka (yousif), in Jebel Aulia Dam in the White Nile, southern Khartoum. The </em><em>species classified in the genus Allocreadium isoproum (Loss, 1902) as a first finding in the Sudanese </em><em>freshwater fishes the genus found from several freshwater fishes in Europe South America, Japan, and </em><em>India  (Yamagutti, 1958). The present study it was the first report in the Sudan and Africa as all. The </em><em>objective of the study were to carryout the following characteristic to describe of parasites with </em><em>relevant classification, the measurement of determination of the prevalence rate density of infection </em><em>parasite.</em>

scholarly journals ISOLASI DAN IDENTIFIKASI BAKTERI Aeromonas sp. DARI LELE DUMBO (Clarias sp.) DI KABUPATEN NGAWI

2016 ◽  
Vol 18 (2) ◽  
pp. 55
Author(s):  
Sri Rejeki ◽  
Triyanto Triyanto ◽  
Murwantoko Murwantoko
Keyword(s):  
Freshwater Fish ◽  
Aeromonas Hydrophila ◽  
Clinical Signs ◽  
Freshwater Fishes ◽  
Skin Ulcer ◽  
African Catfish ◽  
Bacterial Isolates ◽  
Disease Symptoms ◽  
Lethal Dosage

African catfish (Clarias sp.) is one of important freshwater fish which prefer consumed by people due to many advantages. Aeromonas sp. bacteria are dangerous patogen for freshwater fishes. This objective of the research was to isolate, identify and determine pathogenicity of Aeromonas sp. bacteria from African catfish from District Ngawi. The samples of catfish with 20 - 25 cm length showing clinical signs disease were obtained from three sub districts. Bacteria were isolated from kidney and inoculated into GSP medium. Characterization and identification through morphology of bacterial colonies, cells and biochemical test. Postulate Koch was conducted to verify abaility to couse disease. Pathogenicity was analyzed by determination of value of Lethal Dosage-50 on catfish on 7 - 9 cm length. The result showed that the disease symptoms of fish infected by the bacteria were skin ulcer, abdominal swelling and kidney damage. Fifteen bacterial isolates were collected which five, six and four isolates were from Kecamatan Karang Jati, Geneng dan Paron.sub-district respectively. The result showed 12 isolates (GKJ1, GKJ3, GKJ4, GGN1, GGN2, GGN3, GGN4, GGN5, GGN6, GPR2, GPR3 and GPR4) were identified as Aeromonas hydrophila. Three isolates (GKJ2, GKJ5 and GPR1) were identified as A. salmonicida. Isolate of A. hydrophila GKJ1, GKJ4, GGN2, GGN5, GPR2 and GPR4 were virulent to African catfish with LD50 values of 1,55 x 105, 3,89 x 105, 7,24 x 105, 2,39 x 105, 6,61 x 104 and 1,95 x 104 cfu/fish.

scholarly journals Probiotics for cultured freshwater fish

2020 ◽  
Vol 41 (2) ◽  
pp. 105
Author(s):  
Javier Fernando Melo-Bolívar ◽  
Ruth Yolanda Ruiz-Pardo ◽  
Michael E Hume ◽  
Hanna E Sidjabat ◽  
Luisa Marcela Villamil-Diaz
Keyword(s):  
Water Quality ◽  
Gastrointestinal Tract ◽  
Stress Tolerance ◽  
Freshwater Fish ◽  
Filamentous Fungi ◽  
Growth Promotion ◽  
Freshwater Fishes ◽  
Fish Feed ◽  
Probiotic Strains ◽  
Commercial Applications

Probiotic products are viewed as an alternative to the use of antibiotics in freshwater fishes farming. Probiotic organisms include bacteria, yeast, and filamentous fungi offering different benefits to fish including growth promotion, inhibition of pathogen colonisation, and improvement of nutrient digestion, water quality, and stress tolerance, as well as enhancement of reproduction. For these reasons, this review aims to identify the main trends in probiotic amendment in freshwater fishes. Strategies to incorporate the probiotic strains in the fish feed or pellets to allow optimal viability of the strains as they reach the fish gastrointestinal tract (GIT) are crucial in probiotic research and commercial applications for freshwater fish.

APPLICATION OF PIXE TECHNIQUE TO DETERMINATION OF TRACE ELEMENTS IN DIET AND COMPARISON WITH NAA AND ICP-AES

1996 ◽  
Vol 06 (01n02) ◽  
pp. 395-403
Author(s):  
Masae Yukawa ◽  
Yoshito Watanabe ◽  
Yoshikazu Nishimura ◽  
Mieko Kimura
Keyword(s):  
Trace Elements ◽  
South America ◽  
Daily Intake ◽  
Radiation Doses ◽  
Internal Radiation ◽  
Pixe Analysis ◽  
Daily Dietary Intake ◽  
Elemental Concentrations ◽  
Total Diet

PIXE technique was applied to measurement of trace elements in total diet samples collected in Japan for estimation of their daily dietary intake. Results of PIXE analysis were compared with INAA Concentration of Cl, K, Mn and Zn by PIXE analysis well agreed with the results from NAA, while Ca, Fe and Cu showed different results between these two techniques. Preliminary data of elemental concentrations in Mate-cha, a kind of tea popular in South America, determined by ICP-AES indicated a little higher concentration of Cu than that by PIXE and much lower value than that by INAA For Zn. concentrations by PIXE and ICP well agreed to each other, while INAA gave much lower value. Japanese internal radiation doses by 137 Cs and 90 Sr were estimated to be 2.30µSv/year and 1.27µSv/year respectively as the effective dose equivalents using the daily intake data obtained for K and Ca.

scholarly journals Ecology and Conservation of Freshwater Fishes Biodiversity: We Need More Knowledge to Develop Conservation Strategies

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1929
Author(s):  
Rafael Miranda ◽  
Imanol Miqueleiz
Keyword(s):  
Freshwater Fish ◽  
Freshwater Fishes ◽  
Conservation Strategies ◽  
Vertebrate Species

Freshwater fish represent one-fourth of all vertebrate species, despite freshwater occupying less than 1% of the Earth’s surface [...]

scholarly journals First record of Trypanosoma sp. (Protozoa: Kinetoplastida) in tuvira (Gymnotus aff. inaequilabiatus) in the Pantanal wetland, Mato Grosso do Sul State, Brazil

2011 ◽  
Vol 20 (1) ◽  
pp. 85-87 ◽  
Author(s):  
Santiago Benites de Pádua ◽  
Márcia Mayumi Ishikawa ◽  
Fabiana Satake ◽  
Gabriela Tomas Jerônimo ◽  
Fabiana Pilarski
Keyword(s):  
Prevalence Rate ◽  
First Record ◽  
Diagnostic Methods ◽  
Mato Grosso ◽  
First Report ◽  
Paraguay River ◽  
Blood Smears ◽  
Mato Grosso Do Sul ◽  
Pantanal Wetland ◽  
Blood Centrifugation

The blood infection by Trypanosoma sp. in tuvira (Gymnotus aff. inaequilabiatus) from the Pantanal wetland was reported in this study. Ten fish from the Paraguay River in the Pantanal were evaluated for the presence of hemoflagellates. Trypomastigotes of Trypanosoma sp. were observed in blood smears from three fish (30% prevalence) and some forms were seen to be undergoing division. Using the diagnostic methods of fresh examination and blood centrifugation in hematocrit capillary tubes, the prevalence rate was 80%. This is the first report of Trypanosoma sp. in tuvira in Brazil.

scholarly journals Screening and detection of heterogenous vancomycin intermediate Staphylococcus aureus in Hospital Kuala Lumpur Malaysia, using the glycopeptide resistance detection etest and population analysis profiling

2012 ◽  
Vol 4 (1) ◽  
pp. 20 ◽  
Author(s):  
Siti Roszilawati Ramli ◽  
Hui-min Neoh ◽  
Muhammad Nazri Aziz ◽  
Salasawati Hussin
Keyword(s):  
Staphylococcus Aureus ◽  
Prevalence Rate ◽  
Population Analysis ◽  
Kuala Lumpur ◽  
Glycopeptide Resistance ◽  
Methicillin Resistant ◽  
First Report ◽  
Resistance Detection

In a 3-month study done in Hospital Kuala Lumpur (HKL), 7 out of 320 methicillin resistant <em>Staphylococcus aureus </em>isolates were confirmed as heterogeneous vancomycin intermediate S. aureus (hVISA) using the glycopeptide resistance detection e-test and population analysis, giving a prevalence rate of 2.19%. This is the first report of hVISA in Malaysia.

scholarly journals The Evolution of Alternative Buoyancy Mechanisms in Freshwater Fish Eggs

2021 ◽  
Vol 9 ◽  
Author(s):  
Feng Chen ◽  
Carl Smith ◽  
Yeke Wang ◽  
Jun He ◽  
Wulai Xia ◽  
...  
Keyword(s):  
Parental Care ◽  
Freshwater Fish ◽  
Relative Size ◽  
Negative Relationship ◽  
Freshwater Fishes ◽  
Perivitelline Space ◽  
Fish Eggs ◽  
Reproductive Tactics ◽  
Oil Droplets ◽  
Pelagic Eggs

Alternative reproductive tactics (ARTs) are behavioural, morphological, and physiological traits associated with alternative reproductive phenotypes within a population or species. ARTs are widespread in nature, and are a particular feature of teleost fishes. However, few studies have examined egg buoyancy mechanisms in the context of the evolution of ARTs in freshwater fishes. In marine fishes, egg buoyancy is achieved chiefly through hydration. While the buoyancy of freshwater fish eggs has been suggested to be determined primarily through the presence of oil droplets, the majority (60%) of freshwater pelagic eggs do not possess an oil droplet. We applied a physical model of buoyancy to understand the contributions of oil droplets and hydration to the buoyancy of pelagic freshwater fish eggs. We further used phylogenetic regression to estimate the effect of the relative size of the perivitelline space, habitat and parental care on the occurrence of oil droplets, while controlling for non-independence among species due to phylogenetic relatedness. Our analysis demonstrates that the probability of oil droplets in freshwater pelagic eggs exhibits a significant negative relationship with the size of perivitelline space, which may reflect a trade-off relating to energy allocation in contrasting habitats. We also demonstrate a positive association between the probability of oil droplets and the provision of parental care and occupancy of lentic habitats. These findings indicates the evolution of contrasting buoyancy mechanisms as novel ARTs in freshwater fishes. A theoretical model in combination with empirical analysis indicate the evolution of novel ARTs in freshwater fishes as adaptive responses to flow conditions.

scholarly journals XVII. On fossil remains of equines from central and South America referable to Equus conversidens, Ow., Equus tan, Ow., and Equus arcidens, Ow

1869 ◽  
Vol 159 ◽  
pp. 559-573 ◽  
Keyword(s):  
South America ◽  
Similar Pattern ◽  
Molar Tooth ◽  
Santa Fe ◽  
Fossil Remains ◽  
Entre Rios ◽  
Upper Molar

Having examined the dental characters of existing species of the Horse-kind so far as seemed requisite for the determination of the Equine remains found in the Cavern of Bruniquel, I have been enabled, on the same basis of comparison, to deal with other Equine fossils, and propose to communicate in the present Paper the results of this labour in elucidation of those which have reached me from some American localities. In the account of the Mammalian Remains brought from South America in the ‘Voyage of the Beagle,’ I described and figured an upper molar tooth as belonging to a species of Equus ; and this tooth, having been found by Mr. Darwin imbedded in the quartz shingle of cemented pebbles at Punta Alta in Bahia Blanca, together with remains of Megatherium, Megalonyx, Mylodon , and Scelidotherium , I concluded not to be a tooth of a horse imported by Europeans into South America, but to have belonged to an Equine species which had coexisted with those large Megatherioids and had, with them, become extinct at a prehistoric period. An Equine upper molar tooth of similar pattern, included in the collection of fossils from the same ‘Voyage,’ was labelled as having been found in red argillaceous (postpliocene ?) deposits at Santa Fé, in the province of Entre Rios, Buenos Ayres; and this tooth being associated in the series with parts of Mastodon and Toxodon confirmed me in the above conclusion.

Sign in / Sign up

Export Citation Format

Share Document