scholarly journals Parasitic infections in ornamental cichlid fish in the Peruvian Amazon

2015 ◽  
Vol 24 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Jefferson Yunis Aguinaga ◽  
Paulo Fernandes Marcusso ◽  
Gustavo da Silva Claudiano ◽  
Bruno Tadeu Marotta Lima ◽  
Fernanda de Alexandre Sebastião ◽  
...  
Keyword(s):  
Parasite Species ◽  
Cichlid Fish ◽  
Dry Season ◽  
Seasonal Distribution ◽  
Fish Behavior ◽  
Parasitic Infections ◽  
Ichthyophthirius Multifiliis ◽  
Peruvian Amazon ◽  
Preferred Habitat ◽  
Pterophyllum Scalare

The aim of this study was to evaluate the prevalence and seasonal distribution of the main parasite species in Amazonian ornamental cichlids that affect their trade. The study was conducted from August 2007 to September 2009. We sampled 3042 specimens from 9 different species, of which 9.47% had at least one type of external parasite. 81.25% of the cases occurred in the dry season. Crenicichla anthurus (28.57%) was the most parasitized, followed by Aequidens diadema (26.32%), Pterophyllum scalare (22.69%), Cichlasoma sp. (9.52%), Apistogramma sp. (3.88%) and Symphysodon aequifasciatus (3.66%). Monogenea was the most abundant group of parasites, occurring in 66.67% of the cases, of which 96.88% occurred in the dry season. This parasite infested 95.68% of Pterophyllum scalare, 76.67% of Apistogramma sp, 33.33% of Cichlasoma sp. and 23.81% of Symphysodon aequifasciatus cases. Ichthyophthirius multifiliis infested 100% of Aequidens diadema, 76.19% of Symphysodon aequifasciatus, 66.67% of Cichlasoma sp, 41.67% of Crenicichla anthurus and 23.33% of Apistogramma sp cases. Myxosporidia infested 58.33% of Crenicichla anthurus. Trichodina infested 4.32% of Pterophyllum scalare. The prevalence of these parasites is related to the season, preferred habitat, fish behavior, individual susceptibility and handling of animals during transportation by fishermen.

scholarly journals Parasitic infections in tambaqui from eight fish farms in Northern Brazil

2015 ◽  
Vol 67 (4) ◽  
pp. 1070-1076 ◽  
Author(s):  
M.K.R. Dias ◽  
L.R. Neves ◽  
R.G.B. Marinho ◽  
M. Tavares-Dias
Keyword(s):  
Water Quality ◽  
Parasite Species ◽  
Parasitic Infection ◽  
Parasitic Infections ◽  
Ichthyophthirius Multifiliis ◽  
Fish Farms ◽  
Colossoma Macropomum ◽  
Northern Brazil

The aim of this study was to evaluate the parasites and parasite-host relationship in Colossoma macropomum from eight fish farms in Amapá State, Northern Brazil. A total of 12,242,559 parasites were recovered from hosts in the eight fish farms, and 87.4% of fish were infected by one or more parasite species, such as Ichthyophthirius multifiliis, Piscinoodinium pillulare, Trichodinasp. and Tetrahymena sp. (Protozoa), Anacanthorus spathulatus, Linguadactyloides brinkmanni, Mymarothecium boegeri and Notozothecium janauachensis (Monogenoidea), Procamallanus(Spirocamallanus) inopinatus (Nematoda) and Perulernaea gamitanae and Braga patagonica (Crustacea). Ichthyophthirius multifiliis presented dominance, but the greatest levels of parasitism were caused by I. multifiliis, P. pilulare, monogenoideans species and P. gamitanae, and all these parasites had an aggregate dispersion. The eight fish farms have differences in the parasitic infection levels, management and water quality, which are further discussed here.

scholarly journals Parasitic infections of Piaractus mesopotamicus and hybrid (P. mesopotamicus xPiaractus brachypomus) cultured in Brazil

2013 ◽  
Vol 22 (3) ◽  
pp. 407-414 ◽  
Author(s):  
Lidiane Franceschini ◽  
Aline Cristina Zago ◽  
Sérgio Henrique Canello Schalch ◽  
Fabiana Garcia ◽  
Daiane Mompean Romera ◽  
...  
Keyword(s):  
Water Quality ◽  
Parasite Species ◽  
Parasitic Infections ◽  
Ichthyophthirius Multifiliis ◽  
Fish Farms ◽  
Farmed Fish ◽  
Piaractus Mesopotamicus ◽  
Paulo State ◽  
Pathogen Control ◽  
And Storage

This study evaluated the occurrence of parasitic infections in the “pacu” fish Piaractus mesopotamicus and the “patinga” hybrid (P. mesopotamicus x Piaractus brachypomus) in the northwest of São Paulo State, Brazil. Fish from the following three fish farms were evaluated every two months: A, a hatchery and larviculture farm (n = 16 pacu / n = 19 patinga), B, a growout farm (n = 35 patinga) and C, a fee-fishing property (n = 28 pacu / n = 7 patinga). Thirty-five fish from each property were collected from February 2010 to February 2011 and subjected to parasitological analysis. The parasites found were the following:Mymarothecium viatorum, Anacanthorus penilabiatus, Notozothecium janauachensis (Dactylogyridae, Monogenea),Trichodina spp., Ichthyophthirius multifiliis, Chilodonella sp. (Protozoa), Myxobolus spp.,Henneguya spp. (Myxozoa), Rondonia rondoni, Contracaecum sp. (Nematoda), and Dolops carvalhoi(Crustacea). Of the fish examined, 62.9% from “A” and 100% from “B” and “C” were infested with at least one parasite species. Pacu fish (n = 44) showed a higher susceptibility to Anacanthorus penilabiatus infestations, whereas patinga (n = 61) were more susceptible to Mymarothecium viatorum (p < 0.05). Appropriate fish handling (nutrition, transport and storage), in conjunction with monitoring of water quality, can reduce the stress to which the farmed fish are exposed and is essential for pathogen control.

scholarly journals The health impact of polyparasitism in humans: are we under-estimating the burden of parasitic diseases?

Parasitology ◽  
2008 ◽  
Vol 135 (7) ◽  
pp. 783-794 ◽  
Author(s):  
R. PULLAN ◽  
S. BROOKER
Keyword(s):  
Disease Burden ◽  
Parasite Species ◽  
Health Impact ◽  
Multiple Infections ◽  
Parasitic Infections ◽  
Parasitic Diseases ◽  
Human Parasite ◽  
Health Significance ◽  
The Tropics ◽  
International Strategies

SUMMARYParasitic infections are widespread throughout the tropics and sub-tropics, and infection with multiple parasite species is the norm rather than the exception. Despite the ubiquity of polyparasitism, its public health significance has been inadequately studied. Here we review available studies investigating the nutritional and pathological consequences of multiple infections with Plasmodium and helminth infection and, in doing so, encourage a reassessment of the disease burden caused by polyparasitism. The available evidence is conspicuously sparse but is suggestive that multiple human parasite species may have an additive and/or multiplicative impact on nutrition and organ pathology. Existing studies suffer from a number of methodological limitations and adequately designed studies are clearly necessary. Current methods of estimating the potential global morbidity due to parasitic diseases underestimate the health impact of polyparasitism, and possible reasons for this are presented. As international strategies to control multiple parasite species are rolled-out, there is a number of options to investigate the complexity of polyparasitism, and it is hoped that that the parasitological resarch community will grasp the opportunity to understand better the health of polyparasitism in humans.

Seasonal Distribution and Abundance of Dugongs in the Western-Gulf-of-Carpentaria

1989 ◽  
Vol 16 (2) ◽  
pp. 141 ◽  
Author(s):  
P Bayliss ◽  
WJ Freeland
Keyword(s):  
Relative Density ◽  
Relative Abundance ◽  
Coastal Waters ◽  
Seasonal Changes ◽  
Aboriginal People ◽  
Dry Season ◽  
Seasonal Distribution ◽  
Wet Season ◽  
Aerial Surveys ◽  
The 1960S

Aerial surveys of coastal waters (27 216 km2) in the western Gulf of Carpentaria during the dry season of 1984 and wet season of 1985 indicated no major seasonal changes in distribution and relative abundance of dugongs. Minimum population size in the dry season was estimated as 16 816 � 2946 (standard error), with a relative density of 0.62 k 0.11 km-2, and that for the wet season 16 846 + 3257, with a relative density of 0.62 � 0.12 km-2. The estimates exclude 5% of observations which could have been either dugongs or Irrawaddy dolphins, and were corrected for submerged dugongs and those missed on the surface. Dugongs were unevenly distributed over the study area, and neither mean group size nor proportion of calves varied between seasons. Dugong abundance was correlated with area of available seagrass. The catch rate of dugongs by Aboriginal people off Numbulwar decreased six-fold between the 1960s and 1985 (60 to 10 p.a.), possibly due to excessive hunting.

scholarly journals Sensory modalities in cichlid fish behavior

2015 ◽  
Vol 6 ◽  
pp. 115-124 ◽  
Author(s):  
Daniel Escobar-Camacho ◽  
Karen L Carleton
Keyword(s):  
Cichlid Fish ◽  
Fish Behavior ◽  
Sensory Modalities

scholarly journals Parasitic infections of two invasive fish species, the Caucasian dwarf goby and the Amur sleeper, in Hungary

2015 ◽  
Vol 63 (4) ◽  
pp. 472-484 ◽  
Author(s):  
László Antal ◽  
Csaba Székely ◽  
Kálmán Molnár
Keyword(s):  
Fish Species ◽  
Parasite Species ◽  
Fish Fauna ◽  
Parasite Fauna ◽  
Parasitic Infections ◽  
Amur Sleeper ◽  
Perccottus Glenii ◽  
Invasive Fish ◽  
Nippotaenia Mogurndae ◽  
New Fish Species

In recent years and decades, two new fish species, the Caucasian dwarf goby (Knipowitschia caucasica) and the Amur sleeper (Perccottus glenii) have become members of the Hungarian fish fauna. In a 14-month study on the parasite fauna of these species, the authors detected 11 parasite species in the Caucasian dwarf goby and 17 species in the Amur sleeper. All parasites found in dwarf goby belong to species commonly occurring also in native Hungarian fishes, but three species (Goussia obstinata, Gyrodactylus perccotti and Nippotaenia mogurndae) collected from the Amur sleeper are introduced species new for the Hungarian fauna.

Variation in the Mating System of a Biparental Cichlid Fish, Cichlasoma Panamense

Behaviour ◽  
1985 ◽  
Vol 95 (3-4) ◽  
pp. 181-197 ◽  
Author(s):  
R.J. Wootton ◽  
T.J. Townshend
Keyword(s):  
Game Theory ◽  
Sex Ratio ◽  
Parental Care ◽  
Attack Rate ◽  
Brood Size ◽  
Cichlid Fish ◽  
Dry Season ◽  
Water Levels ◽  
Time Away ◽  
A Current

AbstractCichlasoma panamense is a biparental, substrate-spawning cichlid which breeds during the dry season in Panamanian streams. In one population some males helped to defend their offspring throughout the period of parental care but many deserted their mates to achieve additional spawnings leaving females to guard alone. The proportion of C. panamense guarding in pairs increased throughout the breeding season. This was associated with an increase in the rate with which parental cichlids attacked potential brood predators and an increase in brood size. The increase in attack rate was due to the crowding of fishes as water levels receded during the dry season and especially to the increasing numbers of newly independent cichlids which congregated in the shallow water areas where C. panamense brood. The sex ratio in the population was strongly biased towards females. Males spent more time away from the brood than females which enabled them to find and spawn with unmated females. The attack rate of females brooding alone was not significantly higher than that of those with mates and their foraging rate not significantly lower although they spent less time away from their brood. In a more productive stream where population density was high, breeding was almost entirely in monogamous pairs. The rate at which parents attacked potential predators was higher, the sex ratio was 1:1 and brood size was large. The male's decision to guard or desert appears to depend on his opportunities for further matings, the ability of the female to guard alone and the value of a current brood. These results agree with the predictions of game theory models of parental care.

scholarly journals Effect of Seasonality and Ecological Factors on the Prevalence of the Four Malaria Parasite Species in Northern Mali

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Ousmane A. Koita ◽  
Lansana Sangaré ◽  
Hammadoun A. Sango ◽  
Sounkalo Dao ◽  
Naffet Keita ◽  
...  
Keyword(s):  
Plasmodium Falciparum ◽  
Malaria Parasite ◽  
Parasite Species ◽  
Ecological Factors ◽  
Seasonal Fluctuation ◽  
Parasite Prevalence ◽  
Dry Season ◽  
Sahara Desert ◽  
Cross Sectional ◽  
Hot Dry Season

Background. We performed 2 cross-sectional studies in Ménaka in the Northeastern Mali across 9 sites in different ecological settings: 4 sites have permanent ponds, 4 without ponds, and one (City of Ménaka) has a semipermanent pond. We enrolled 1328 subjects in May 2004 (hot dry season) and 1422 in February 2005 (cold dry season) after the rainy season.Objective.To examine the seasonality of malaria parasite prevalence in this dry northern part of Mali at the edge of the Sahara desert.Results. Slide prevalence was lower in hot dry than cold dry season (4.94 versus 6.85%,P=0.025). Gametocyte rate increased to 0.91% in February. Four species were identified.Plasmodium falciparumwas most prevalent (74.13 and 63.72%).P. malariaeincreased from 9.38% to 22.54% in February. In contrast, prevalence ofP. vivaxwas higher (10.31%) without seasonal variation. Smear positivity was associated with splenomegaly (P=0.007). Malaria remained stable in the villages with ponds (P=0.221); in contrast, prevalence varied between the 2 seasons in the villages without ponds (P=0.004).Conclusion. Malaria was mesoendemic; 4 species circulates with a seasonal fluctuation forPlasmodium falciparum.

scholarly journals Dry Season Prevalence of Gastrointestinal Parasites in Ruminants in Sokoto Metropolis

2020 ◽  
pp. 33-39 ◽  
Author(s):  
Aliyu Mahmuda ◽  
Aliyu Mustapha Abba ◽  
Aniefuna Ivy Sochima ◽  
Kamal Muhammad Moriki
Keyword(s):  
Mixed Infection ◽  
Dry Season ◽  
Gastrointestinal Parasites ◽  
Parasitic Infections ◽  
Mixed Infections ◽  
Prevalence Rates ◽  
Faecal Samples ◽  
High Prevalence ◽  
Carry Over ◽  
Friesian Cattle

This study was conducted with the aim of determining the dry season (January-May, 2018) prevalence of gastrointestinal parasites in special breeds of ruminants in Sokoto Metropolis. A total of 100, 85 and 75 faecal samples were collected from Sudanese breed of Sheep, WAD/Sahel Goats and Friesian Cattle respectively. Faecal samples were examined using standard parasitological techniques (Simple flotation and Centrifugal sedimentation). For the Sheep, a total of 51 samples were positive for presence of gastrointestinal parasites. Male animals have higher prevalence (52.9%) than their female (47.1%) counterparts. The major parasites observed were Eimeria and Strongyles with prevalence of (64.71%), while the least observed parasites were mixed infections (35.29%). From the total of 85 goat faecal samples examined, an overall prevalence of 54.7% was observed. The prevalence rates for Strongyle, Eimeria and mixed infections were 57.5%, 34.0% and 8.5% respectively. The prevalence was more in males than in the females. Strongyleeggs were more, compared to other helminthes eggs. For the Friesian Cattle, sixty (60) samples out of 75 samples analyzed were positive for either Strongyleeggs or Eimeria (oocyst) infection or both (mixed) constituting about 80% prevalence. Forty-two (70%) samples were positive for Strongyle eggs, 14 (23.3%) for Eimeria oocyst and 4 (6.7%) for mixed infection of both. From the overall prevalence, female had a high prevalence of 34(56.7%) than male cattle 26(43.3%). Based on the results of the present findings, it was concluded that gastrointestinal parasitic infections also occur during the dry season in Sokoto which may be as a result of carry-over of infection during the succeeding rainy season.

scholarly journals Occurrence ofBlastocystissp. in water catchments at Malay villages and Aboriginal settlement during wet and dry seasons in Peninsular Malaysia

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2541 ◽  
Author(s):  
Samseh Abdullah Noradilah ◽  
Ii Li Lee ◽  
Tengku Shahrul Anuar ◽  
Fatmah Md Salleh ◽  
Siti Nor Azreen Abdul Manap ◽  
...  
Keyword(s):  
River Water ◽  
Water Samples ◽  
Water Sources ◽  
Dry Season ◽  
Parasitic Infections ◽  
Wet Season ◽  
River Water Samples ◽  
Sampling Points ◽  
Dry Seasons ◽  
Wet And Dry Seasons

In the tropics, there are too few studies on isolation ofBlastocystissp. subtypes from water sources; in addition, there is also an absence of reported studies on the occurrence ofBlastocystissp. subtypes in water during different seasons. Therefore, this study was aimed to determine the occurrence ofBlastocystissp. subtypes in river water and other water sources that drained aboriginal vicinity of highly endemic intestinal parasitic infections during wet and dry seasons. Water samples were collected from six sampling points of Sungai Krau (K1–K6) and a point at Sungai Lompat (K7) and other water sources around the aboriginal villages. The water samples were collected during both seasons, wet and dry seasons. Filtration of the water samples were carried out using a flatbed membrane filtration system. The extracted DNA from concentrated water sediment was subjected to single round polymerase chain reaction and positive PCR products were subjected to sequencing. All samples were also subjected to filtration and cultured on membrane lactose glucuronide agar for the detection of faecal coliforms. During wet season,Blastocystissp. ST1, ST2 and ST3 were detected in river water samples.Blastocystissp. ST3 occurrence was sustained in the river water samples during dry season. HoweverBlastocystissp. ST1 and ST2 were absent during dry season. Water samples collected from various water sources showed contaminations ofBlastocystissp. ST1, ST2, ST3 and ST4, during wet season andBlastocystissp. ST1, ST3, ST8 and ST10 during dry season. Water collected from all river sampling points during both seasons showed growth ofEscherichia coli and Enterobacter aerogenes, indicating faecal contamination. In this study,Blastocystissp. ST3 is suggested as the most robust and resistant subtype able to survive in any adverse environmental condition. Restriction and control of human and animal faecal contaminations to the river and other water sources shall prevent the transmission ofBlastocystissp. to humans and animals in this aboriginal community.

Sign in / Sign up

Export Citation Format

Share Document