Community structure of protozoan parasites in Heteropneustes fossilis (Bloch 1794) in Bangladesh

2021 ◽  
Vol 30 (2) ◽  
pp. 307-316
Author(s):  
Md Aminul Islam Bhuiyan ◽  
Zannatun Nahar Jhinu ◽  
Rita Parveen ◽  
Abdul Jabber Hawlader
Keyword(s):  
Parasite Species ◽  
Blood Parasites ◽  
Protozoan Parasites ◽  
Host Fish ◽  
Locality Record ◽  
Freshwater Habitats ◽  
Important Host ◽  
Study Sites ◽  
Almost All ◽  
Gill Parasites

The study was conducted to prepare a database for the infection status of protozoan parasites on an important host fish species of Bangladesh, Heretropneustes fossilis. Host samples were collected from the freshwater habitats of six different districts of Bangladesh- Manikganj, Faridpur, Mymensingh, Kishoreganj, Bogura, and Jashore. H. fossilis was noted to be infected by 6 parasite species, of which 3 belonged to myxozoa (Henneguya singhi, Henneguya qadrii and Henneguya mystusia); 1 belonged to ciliophora (Trichodina siddiquae) and 2 (Trypanosoma singhii and Piscinoodium pillulare) belonged to mastigophora.The parasites, Trypanosoma singhii and Henneguya singhi were recorded as new locality record in H. fossilis. The three parasites Piscinoodium pillulare, Henneguya qadrii and Henneguya mystusia were the first recorded parasites in this fish and the first locality record in Bangladesh. The parasites were observed to occupy gill, body slime, and blood. Gill parasites were abundantly found compared to body slime and blood parasites. The highest prevalence (67.21%) of infection of H. fossilis was observed in Manikganj and the lowest prevalence (54.67%) of infection was observed in Bogura. Parasites of H. fossilis showed the highest diversity in fishes of Faridpur (2.63). Species richness of parasites was highest in Manikganj (0.38) and species evenness was relatively low (0.13-0.19) in almost all the study sites. Dhaka Univ. J. Biol. Sci. 30(2): 307-316, 2021 (July)

scholarly journals Recruitment, Dispersal, and Demographic Rescue in Spatially-Structured White-Tailed Ptarmigan Populations

The Condor ◽  
2000 ◽  
Vol 102 (3) ◽  
pp. 503-516 ◽  
Author(s):  
Kathy Martin ◽  
Peter B. Stacey ◽  
Clait E. Braun
Keyword(s):  
General Pattern ◽  
Population Connectivity ◽  
Site Location ◽  
Breeding Sites ◽  
Stochastic Conditions ◽  
Local Survival ◽  
Regular Event ◽  
Study Sites ◽  
One Year ◽  
Almost All

Abstract We studied recruitment and dispersal of White-tailed Ptarmigan (Lagopus leucurus) breeding in naturally fragmented alpine habitats at four study sites in Colorado from 1987–1998. Almost all recruitment for both sexes, particularly females, was of birds produced outside local populations and also external to nearby studied populations. Populations were more dependent on female recruitment than on male recruitment to sustain them, and patterns of recruitment were not correlated with local survival of adults or production of young the previous year, except at one site for females. Over 95% of recruits were yearlings. Breeding dispersal of adults, an infrequent but regular event, was also important to inter-population connectivity. Our data for multiple populations allowed us to describe movement patterns among populations to assess consistency with conditions required for a rescue system. After widespread reproductive failure in one year, we expected all populations the next year would have low recruitment due to a reduced supply of recruits produced in the region. Recruitment was low, but impact varied among populations. We conducted an over-winter study of radio-marked offspring to determine possible influences of winter site location and relatives on recruitment patterns. Contrary to expectation, offspring remained on or near breeding sites in winter, but were not located near their mothers or siblings. Recruitment location was related to winter site location. White-tailed Ptarmigan exhibit a well developed capacity for external recruitment that allows them to persist in small populations with stochastic conditions for breeding and survival. Extensive external recruitment may be a general pattern for birds.

scholarly journals Seasonal variation of the plerocercoid ligula intestinalis (L) observed in roach (Rutilus rutilus, L) from the yenice irrigation pond, Çanakkale, Turkey

2004 ◽  
Vol 58 (1-2) ◽  
pp. 127-133 ◽  
Author(s):  
Cemal Oguz ◽  
Öztürk Oguz ◽  
Hayati Güre
Keyword(s):  
Seasonal Variation ◽  
Parasite Species ◽  
Abdominal Cavity ◽  
Rutilus Rutilus ◽  
The Other ◽  
Host Fish ◽  
Roach Rutilus Rutilus ◽  
Mean Intensity ◽  
Ligula Intestinalis ◽  
Irrigation Pond

This study was carried out at the Yenice Irrigation Pond between October 1999 and October 2000. For this study 368 roach (Rutilus rutilus) were examined and 37 parasites and 93 Ligula intestinalis were found in the abdominal cavity of the host (prevalence 10.1%, mean intensity 2.51 specimens/fish). Based on season, the highest number of infected fish occurred during summer (33.3%, 4 parasite/fish), and during the other season the mean intensity of infection was relatively low (prevalence 3.3%, 1 specimens/fish). On the other hand, the parasite species was determined especially on small and medium host fish sizes (2.17-100%). Basic criteria for the assessment of the parasite species of host fish were the general parameters related to parasite populations, which are prevalence, mean intensity, seasonal variation, and relationship between host size and infection.

Advances in Understanding Landscape Influences on Freshwater Habitats and Biological Assemblages

2019 ◽  
Keyword(s):  
Forested Wetlands ◽  
Timber Harvest ◽  
Large Wood ◽  
Catchment Scale ◽  
Southeast Alaska ◽  
Riparian Management ◽  
Freshwater Habitats ◽  
Study Sites ◽  
Landscape Attributes ◽  
Landscape Influences

<i>Abstract.</i>—Currently, much is known about influences of landscape attributes, including timber harvest practices, on large wood dynamics in streams. Comparatively, much less is known about influences of catchment attributes on Southeast Alaska streams, in part because of a historical lack of consistent catchment-scale data available for the region. As in forested regions elsewhere, large wood is an important resource to stream habitats and fishes in Southeast Alaska. Therefore, the purpose of this study was to characterize catchment-scale influences, including various timber harvest practices, on large wood in Southeast Alaska stream sites. We delineated local catchment boundaries for all stream reaches in the region and summarized landscape influences, including natural and harvest-related attributes in local and network catchments. Relative amounts of variation in four large wood habitat variables explained by natural versus harvest practice-related landscape attributes were evaluated to compare different influences on 28 randomly selected study sites. We used those results to predict variation in large wood variables from our sites through use of both natural and harvest practice-related catchment attributes to identify those that may be most influential to large wood. Natural characteristics, including catchment area, deciduous forests, forested wetlands, and catchment slope, all had significant influences on large wood variables, as did various measures of contemporary and historical timber harvest practices. We found that large wood length was positively related to conventional harvest after 1990, suggesting the potential effectiveness of contemporary logging regulations in protecting large wood characteristics. In our study, both natural and timber harvest practice-related attributes had measureable influences on stream habitat, underscoring the importance of considering catchment-scale attributes, including riparian management schemes, for managing Southeast Alaska streams.

scholarly journals Distribution of Flavobacterium psychrophilum and its gyrA genotypes in a river

2019 ◽  
Vol 85 (6) ◽  
pp. 913-923 ◽  
Author(s):  
Erina Fujiwara-Nagata ◽  
Yuki Shindoh ◽  
Michitaka Yamamoto ◽  
Takashi Okamura ◽  
Kentaro Takegami ◽  
...  
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Lake Biwa ◽  
Dna Gyrase ◽  
Nucleotide Polymorphisms ◽  
Oncorhynchus Masou ◽  
Sampling Area ◽  
Host Fish ◽  
Single Nucleotide ◽  
Flavobacterium Psychrophilum ◽  
Almost All

Abstract Flavobacterium psychrophilum can be divided into three genotypes, G-C type (ayu type), A-C type (multi-fish type), and A-T type (salmon-trout type), by two single-nucleotide polymorphisms in the DNA gyrase subunit A (gyrA) gene. We isolated F. psychrophilum from various samples collected from the lower basin of a river flowing into Lake Biwa, as a model for bacterial survey, in Shiga Prefecture in June, September, and December from 2010 to 2013 and investigated their gyrA genotypes. All three types of F. psychrophilum were isolated in June when ayu went up the river from the lake. In September, ayu gathered in the lower river basin for spawning and became high in density, almost all of the isolates were of the G-C genotype and the A-T genotype was never isolated. In December, only the A-T type was isolated from the river samples, when Biwa trout Oncorhynchus masou rhodurus came to the river to spawn and were present in the sampling area. In accordance with the seasonal change of the host fish species in the river, the genotype of F. psychrophilum isolated from the environment seems to have changed as well.

Checklist of Protozoan parasites of fishes from Brazil

Zootaxa ◽  
2012 ◽  
Vol 3221 (1) ◽  
pp. 1 ◽  
Author(s):  
JORGE C. EIRAS ◽  
RICARDO M. TAKEMOTO ◽  
GILBERTO C. PAVANELLI ◽  
JOSÉ L. LUQUE
Keyword(s):  
Host Species ◽  
Parasite Species ◽  
Marine Fishes ◽  
Protozoan Parasites ◽  
Host Habitat

Provided is a list of the protozoan parasites of freshwater and marine fishes from Brazil. This report includes informationabout the site of infection, host habitat, localities and references of 100 parasite species (1 amoeba, 70 flagellates, 13 api-complexa and 16 ciliates) distributed among 112 different host species, mainly from freshwater. It is concluded that thediversity of protozoan parasites from Brazilian fish is understudied, and it is suggested that appropriate measures be taken in the research efforts to increase studies on the diversity of Protozoans parasites of fish from Brazil.

Living apart and having similar trouble: are frog helminth parasites determined by the host or by the habitat?

2016 ◽  
Vol 94 (11) ◽  
pp. 761-765 ◽  
Author(s):  
K.M. Campião ◽  
O.T. Dias ◽  
R.J. Silva ◽  
V.L. Ferreira ◽  
L.E.R. Tavares
Keyword(s):  
Host Species ◽  
Parasite Species ◽  
Helminth Parasites ◽  
Sympatric Populations ◽  
Behavioral Traits ◽  
Parasite Communities ◽  
Host Habitat ◽  
Species Characteristics ◽  
Study Sites ◽  
Leptodactylus Chaquensis

Sympatric hosts are exposed to similar ecological conditions, particularly if they are closely related phylogenetically and share some physiological and behavioral traits. We studied the sympatric frogs Leptodactylus chaquensis Cei, 1950 and Leptodactylus podicipinus (Cope, 1862) to investigate the extent to which the helminth parasite communities were influenced by host species’ characteristics or habitat location. We described and compared the helminth communities of 50 L. chaquensis and 40 L. podicipinus collected concurrently from two different study sites in Brazil’s Pantanal floodplain. Similarities in the prevalence and mean abundance of helminths were higher among allopatric populations of the same species than among sympatric populations of different species. The effects of host species, size, and habitat on helminth composition were significant. The amount of variance in the helminth community composition explained by host species and size was greater than that explained by host habitat. These results indicate that the main factors determining similarities in parasite species in this study system are the coevolutionary and biological constraints of the host species, which either limit or allow infection of the parasite species despite the host habitat.

A checklist of the Cymothoidae (Crustacea, Isopoda) recorded from Indian fishes

2011 ◽  
Vol 56 (4) ◽  
Author(s):  
Jean-Paul Trilles ◽  
Samuthirapandian Ravichandran ◽  
Ganapathy Rameshkumar
Keyword(s):  
Host Species ◽  
Parasite Species ◽  
Species Level ◽  
Valid Species ◽  
Nominal Species ◽  
Host Fish ◽  
Host List

AbstractA checklist of the parasitic Cymothoidae of Indian fishes was compiled from parasitological records published between 1783 and 2011. The checklist is arranged alphabetically, providing valid names, synonyms and authorities of the parasite species, as well as valid names and synonyms of the host fish, its capture sites, author(s) and date of published records. The host list consists of all parasites species listed under the host species. A total of 47 nominal species corresponding to 36 valid species are listed from 74 host species belonging to 34 families. Several parasites not identified to species level and parasite species without the host data or where the parasite was found not associated with a fish are also included in this checklist.

A checklist of metazoan parasites recorded in freshwater fish from Turkey

Zootaxa ◽  
2003 ◽  
Vol 394 (1) ◽  
pp. 1 ◽  
Author(s):  
AHMET ÖKTENER
Keyword(s):  
Freshwater Fish ◽  
Host Species ◽  
Parasite Species ◽  
Host Fish ◽  
Species List ◽  
Metazoan Parasites ◽  
Host List

A checklist of the metazoon parasites of freshwater fish in Turkey has been compiled from parasitological studies done in Turkey between 1964 and 2003. The parasite species list is arranged by phylum and class, providing parasite species name and author, host fish, location of host fish capture and author and date of published record. The host list consists of all parasite species listed by host species. One hundred and thirteen parasite species are listed from 41 host species belonging to 26 genera.

scholarly journals Checklists of Species of Ancylodiscoidid and Ancyrocephalid Monogeneans from Fishes of Iraq

2019 ◽  
Vol 32 ◽  
pp. 45-62
Author(s):  
Furhan T. Mhaisen ◽  
Kefah N. Abdul-Ameer
Keyword(s):  
Fish Species ◽  
Host Species ◽  
Parasite Species ◽  
Fish Host ◽  
Marine Habitats ◽  
The Family ◽  
Freshwater Habitats

Surveying 59 references concerning the occurrence of the monogeneans of the families Ancylodiscoididae and Ancyrocephalidae parasitizing fishes of Iraq showed the occurrence of 11 taxa of the family Ancylodiscoididae (genera Ancylodiscoides, Bychowskyella, Chauhanellus, Hamatopeduncularia and Thaparocleidus) and 19 taxa of the family Ancyrocephalidae (genera Ancyrocephalus, Cichlidogyrus, Cleidodiscus, Haliotrema, Ligophorus and Mastacembelocleidus). These monogeneans were reported from 19 valid fish host species in Iraq. Apart from five parasite species which were recorded from marine habitats (Ancyrocephalus sp., Chauhanellus australis, Haliotrema mugilis, Hamatopeduncularia sp. and Ligophorus mugilinus), the remaining parasite species were recorded from freshwater habitats. Among the infected fishes with these parasites, the Tigris catfish Silurus triostegus was infected with the highest number of parasite species (11 species), the mugilid fishes (Planiliza abu and P. subviridis) were infected with eight and seven parasite species, respectively, while 11 fish species were infected with only one parasite species each. Among the parasite species, Thaparocleidus vistulensis was reported from nine fish host species, while 22 parasite species were reported from one host species each. So far, eight synonymous names were applied for seven valid names of parasites of these two families in Iraq.

scholarly journals From Africa to Brazil: detection of African Oreochromis niloticus parasites in Brazilian fish farms

2019 ◽  
Vol 31 ◽  
Author(s):  
Diego Azevedo Zoccal Garcia ◽  
Mário Luís Orsi ◽  
Ângela Teresa Silva-Souza
Keyword(s):  
Oreochromis Niloticus ◽  
Native Species ◽  
Parasite Species ◽  
River Basins ◽  
Southern Brazil ◽  
Specific Procedure ◽  
Fish Farms ◽  
Gill Parasite ◽  
Gill Parasites ◽  
Imminent Risk

Abstract Aim To evaluate the introduction of Oreochromis niloticus gill parasites in the Paranapanema River basin, northern Paraná, southern Brazil, as well as to inventory its occurrences in Brazilian fish farms and discuss the risks of transmission to native fauna. Methods The gills of 632 fish specimens from four fish farms in the Paranapanema Basin were analyzed. The parasites were collected, processed and identified according to specific procedure. Literature review was carried out to compile records of occurrence of gill parasites species in other Brazilian river basins. Results A total of seven (7) species of parasites were recorded, five (5) of the genus Cichlidogyrus, one (1) of Scutogyrus (Ancyrocephalidae, Monogenoidea) and one (1) of Lamproglena, Lamproglena monodi (Copepoda, Lernaeidae). All native from Africa. Some of these species have been reported in fish farms located in five other Brazilian watersheds. However, in this study a greater number of African gill parasite species was recorded in fish farms in northern Paraná (seven species), in the Paranapanema Basin, with Cichlidogyrus rognoni reported only for this basin. Conclusions The results confirm the introduction of these African parasites along with their host, O. niloticus, and the establishment of these species in Brazilian waters, since many specimens belonging to the species identified herein presented breeding activity for at least one period of the year. Although, only L. monodi has been recorded parasitizing Brazilian native species, data reported for other countries demonstrates the imminent risk of transmission of these O. niloticus parasites to native cichlids.

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