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BackgroundIn Anzali Lagoon, there are some endemic and exotic fishes. The present study was conducted to compare the parasitic fauna of Blicca bjeorkna, as an endemic fish and Hemiculter leucisculus, as an introduced fish to the lagoon.
Methods
A parasitological investigation was done on 78 specimens of B. bjoerkna and 114 of H. leucisculus. The f...
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Oreochromis niloticus, being one of the most commonly cultured fish on earth constitutes a favorable biotope for myxosporidia. This study provides information concerning the prevalence and mean intensity of Myxobolus species recorded in the kidney and spleen of O. niloticus. O. niloticus were sampled in farming ponds at Bamendou in Cameroon. Classi...
Citations
... H. leucisculus also consumes a wide variety of organisms and can easily switch to alternative food resources. Therefore, at high densities this species could represent a serious food competitor to native fish species in the AWC (Holčík and Razavi, 1991) and also poses risks as a new host for some parasites (Sattari et al., 2007;Pazooki et al., 2011). ...
... Hemiculter leucisculus also consumes a wide variety of organisms and can easily switch to alternative food resources. Therefore, at high densities this species could represent a serious food competitor to native fish species in the AWC (Holčík & Razavi, 1991) and may pose risks as a new host for some parasites (Pazooki, Tajbakhsh, & Masoumian, 2011;Sattari et al., 2007). ...
Risk screening tools play a crucial role in identifying potential high-risk non-native (NN) fish species. In this study, potentially invasive NN fish species in the Anzali Wetland Complex (AWC), which is located on the south coast of the Caspian Sea (Iran), were identified using the Aquatic Species Invasiveness Screening Kit (AS-ISK). In total, 29 freshwater fish species were screened of which 13 exist in the AWC and 16 in close proximity to it (‘horizon’ species). Receiver operating characteristic curve analysis showed that AS-ISK could discriminate reliably between non-invasive and invasive fish species for the AWC. Mean threshold scores were 3.25 for the Basic Risk Assessment (BRA) and 11.75 for the BRA+CCA (BRA + Climate Change Assessment), and these respectively classified 89.7% and 86.2% of the species as high risk. The CCA resulted in an increase in the BRA scores for 86.2% of the species, suggesting a need to account in future NN species management for a likely increased invasiveness of those species under future climate conditions. These results suggest that AS-ISK could prove an effective tool for identifying potentially invasive NN freshwater fishes also in other wetlands of the Caspian Sea basin.
... Darss-Zingst Peninsula/Bodden Chain), a shallow lagoon-like estuary with freshwater characteristics and less salinity compared 1 3 to the brackish Baltic Sea (see Reimer [43], Kemsis [44] and Layka [45] for information on the fish parasite fauna of the Bodden water bodies). Round gobies are vectors of C. osculatum larvae [37], and the parasite also infects cyprinids [46] commonly found in the inner bay (typically roach and bream). Additional research effort should be placed on the prevalence and parasite load of these potential hosts of C. osculatum, to evaluate their influence on the seals, especially on younger animals that hunt smaller fish like the gobies. ...
Purpose:
Endoparasitic nematodes of six harbour porpoises Phocoena phocoena and four grey seals Halichoerus grypus, stranded at the eastern coast of the Baltic Sea in Germany in winter 2019, were analysed in order to identify nematode parasites and to compare with recent studies from the same area.
Methods:
Endoparasitic nematodes were identified by using both morphological and molecular characters. The successfully obtained sequences of the rDNA marker regions ITS-1, 5.8S, ITS-2 from 29 anisakid and the rDNA marker region ITS-2 of 11 pseudalid nematodes were amplified.
Results:
Analyses revealed the presence of three parasite species, the anisakid nematode Contracaecum osculatum from grey seals and the pseudalid nematodes Pseudalius inflexus and Stenurus minor from the harbour porpoises. Other anisakid nematodes regularly occurring in the Baltic Sea, e.g. Anisakis simplex or Pseudoterranova decipiens, were not found.
Conclusions:
The prevalence of 100% and a severe parasite load in grey seals demonstrated a very high C. osculatum infection of Baltic Sea fish as their regular prey. Prevalence of 33% for parasites in harbour porpoises and minor infection rates, combined with a distinct lack of anisakid nematodes, are typical for the current situation of the porpoise parasite fauna in the Baltic Sea. Invasive parasite species as possible indicators for climate change could not be detected.
... Monogeneans are taken into consideration for exceptional host specifics regarding infectivity assessment of different groups of fish parasites [18]. Having said the environmental adaptation and host-specifics had limited the effect on their distribution [19]. In contrast, many monogenean species exhibit a high degree of specificity. ...
Habitually, gills of cyprinid fish have deemed the natural habitats of Dactylogyrus spp. worldwide. Taxonomically, this common monogenean ectoparasite belongs to the Dactylogyridae family. It could be mentioned that the current study is the first comprehensive attempt at highlighting the host specificity of this flatworm parasite that affects Iraqi freshwater fish. Moreover, community components of the parasite and diversity dynamics are also elaborated upon. A total of 681 fish belonging to 18 species (Cyprinidae family) were collected in the Lesser Zab River from August 2016 to July 2017. The fish were examined monthly for diversity fluctuation and abundance in communities of gill Dactylogyrids species, host specificity, fish length, and fish weight. The results revealed the presence of 21 Dactylogyrid species, including 10 specialists and 11 generalists. Among them, the highest richness mean (252) was documented for D. carassobarbi, while the highest prevalence percentage (44.44%) was recorded for D. pavlovskyi. On the other hand, the highest mean community abundance (35.7) and mean parasite community species richness (464) were observed for D. kersini. There were no significant differences in host specificity for infested fish total lengths and weights. Regarding seasonal variations, the highest Dactylogyrid species richness was in March 2017. Most species abundance was reported on gill numbers II and III for both sides.
... But there are also some differences, in Lake Büyük Akgöl, no intestinal digeneans, acanthocephalan and nematodes were found in B. bjoerkna, despite this fish infected by three intestinal digeneans in Lake Sapanca. A parasitological survey conducted in Kocadere Stream, Bursa on B. bjoerkna by Selver et al. (2010) Pazooki et al. (2011) and 11 parasite species found. Identical parasite species from Anzali with our study and their overall prevalence are Trichodina perforate 53.9%, Myxobolus musayevi 27.2%, D. sphyrna 5.2%, D. spathaceum 98.7% and P. cuticola 15.4%. ...
Bugüne kadar Büyük Akgöl’den Blicca bjoerkna’da bulunan parazitler hakkında
herhangi bir veri bildirilmemiştir. Bu nedenle çalışmamız, hiperöytrofik
karakterdeki Büyük
Akgöl’de yaşayan bu cyprinid balığın parazit component ve infra-komünitesinin
kompozisyon ve çeşitliliğinin araştırılmasını amaçlamış ve Temmuz 2016 ile Haziran 2017 arasında toplam 61 B. bjoerkna ile çalışılmıştır. Tüm balıklar aşağıda
belirtilen taksonlardan en az bir parazit türüne konak olmuştur: Trichodina
sp., Epistylis sp. (Protozoa); Myxobolus sp. (Myxozoa); Dactylogyrus
sphyrna, D. cornu, D. cornoides, D. distinguendus ve Paradiplozoon homoion
(Monogenea); Caryophyllaeus laticeps ve Cestoda gen. sp. (Cestoidea);
Diplostomum sp., Thylodelphys clavata ve Posthodiplostomum
cuticola (Digenea); Piscicola geometra (Hirudinea); Glochidium
sp. (Mollusca) ve Argulus
foliaceus
(Crustacea). Komponent komünitedeki baskın türler Diplostomum sp., D. cornoides ve D. cornu
olarak belirlenmiş ve toplam olarak 2063 adet çok hücreli parazit bireyi
toplanmıştır. B.bjoerkna’nın parazit infra komunitesinin 1-10 tür tarafından
enfekte edildiği ve ortalama tür zenginliğinin 5.3 olduğu belirlenmiştir. Çok
hücreli parazit ortalama çeşitliliği (Shannon’s H index) 2.08 ve Shannon-Wiener
Evenness (E) ortalama değeri 0.81 olarak bulunmuştur. B.bjoerkna’da teşhis edilen parazit
türleri Büyük Akgöl için ilk kayıtlardır.
... R. acus is a cosmopolitan species reported from different host species (see Smith 1984;Moravec 1994;Nagasawa et al. 2007). The Caspian Sea and its drainage basin are also the regions from where this nematode species has frequently been reported (Khara et al. 2011;Pazouki et al. 2011;Rahanande et al. 2011;Sattari et al. 2001Sattari et al. , 2005. Nonetheless, the morphological and genetic characteristics of R. acus are unknown in this water body. ...
Recently, it has been shown that many nematode species are in fact species complex, using exact morphological and genetic studies. In this case, there are no such studies related to the genus Raphidascaris Railliet & Henry, 1915. Herein, the morphological and genetic variations among the Iranian population of the species Raphidascaris acus (Bloch, 1779) Railliet & Henry, 1915 and the other allopatric populations with morphological and genetic information were compared to show whether this species can be considered as a species complex. R. acus is an anisakid species and has been frequently reported from different host species from the Caspian Sea. Nonetheless, there are no morphological and genetic information for this species from the region. In the present study, a total of 20 specimens of R. acus were collected from Esox lucius Linnaeus, and the morphology of the Caspian population of this species was surveyed for the first time using both light and scanning electron microscopy. Meanwhile, some parts of ribosomal DNA (rDNA) including internal transcribed spacer 1 (ITS1), 5.8 s, and ITS2 were sequenced and presented as the genetic marker for this species. To understand whether R. acus can be considered as a species complex, the Caspian population of this species was compared morphologically with the allopatric populations of Czech and Canada and genetically with the allopatric population of Poland (Vistula lagoon). Morphologically, there was no difference between the Caspian and Czech populations, but the Caspian and Canadian populations differed in the length of ejaculatory duct and the presence of small triangular elevation between the bases of subventral lips. The nucleotide difference between the Caspian and Polish populations was 4.48 %. In comparison with the interspecific genetic distances in the genus Raphidascaris, this value is notable. In conclusion, based on morphological and genetic differences among the allopatric populations of R. acus, this species is probably a species complex. Nonetheless, the definitive taxonomic decision in recognizing R. acus as a species complex and the description of its sibling species depend on surveying other allopatric populations morphologically and genetically accompanied by an evaluation of reproductive isolation among them.
This article investigates the occurrence and distribution of parasitic protozoa of Iranian freshwater fishes (both farmed and wild). Our search shows 26 known parasitic protozoan species were recorded from 52 freshwater fish species across different ecoregions of Iran. Most of these fish are edible. While none of the identified protozoan parasites are of zoonotic importance, our study does not exclude presence of zoonotic species in Iranian fishes. Present data suggest the northern and western regions of the country are the main macrohabitat of protozoa (35 parasitic records reported), with the greatest concentration of parasitic protozoa occurring in the Urmia basin in Iran's northwest. The clustered distribution pattern of protozoa among freshwater fish was also more evident in the northern and western parts of the country. The gills and skin were the most infected microhabitats for parasitic protozoa. The highest number of parasites was observed in the fish family Cyprinidae with nine species found in the native fish, Capoeta capoeta. The most diverse host range was observed in the holotrich ciliate, Ichthyophthirius multifiliis isolated from 46 cyprinid species in 39 different locations. However, due to the great richness of fish and extreme habitat diversity, parts of the parasite fauna of Iranian freshwater fish are still poorly understood. Furthermore, current and future changes in climate and environmental parameters, and anthropogenic interventions are likely to affect fish hosts and their parasites.
Background
Fish is a great nutritious food and provides quality protein and a variety of vitamins and minerals. This contributes significantly to the economy and food security in Iran. However, there are safety concerns related to the presence of zoonotic parasites.
Objectives
The objective of this study is, therefore, to review fish‐borne zoonotic parasites in Iran.
Methods
Keywords such as fish‐borne, parasites, zoonotic, Iran, and some names of fish‐borne zoonotic parasites were searched in databases including PubMed, Science Direct, Elsevier, SID, Magiran, Irandoc, Google Scholar and the World Health Organization.
Results
The most common fish‐borne parasites with zoonotic potential identified in reports in the literature were the protozoa Balantidium spp., Myxobolus spp. and Sarcosystis sp.; the trematodes Heterophyes heterophyes and Clinostomum complanatum; the cestodes Ligula intestinalis and Diphyllobothrium latum; the nematodes Pseudoterranova sp., Anisakis spp., Contracaecum spp., Raphidascaris spp., Eustrongylides spp. and Capillaria sp.; and the acanthocephal Corynosoma spp.
Conclusions
The potential risk factors for the transmission of fish‐borne zoonotic parasites to humans are consumption of raw or undercooked infected fish, contact with contaminated water and contact with infected fish. There is a need for epidemiological surveillance of fish for parasites with zoonotic potential and of occurrence of infections in humans to better understand the public health significance and design prevention programs.
Digeneans are an important class of trematodes which infect variety of animals ranging from vertebrates (mainly final hosts) to invertebrates (mainly as intermediate hosts). Additionally, some of these parasites are zoonotic and one health importance. Diversity of digeneans in Iran and reports of several zoonotic cases show the importance of these parasites in this country. This is the checklist of digenean parasites reported from Iran representing a total of 118 species, from 105 genera, 43 families, 21 subfamilies, and 3 orders that are reported from 139 species of different hosts including humans. Some of the most important final number of families, genera, and species reported in Iran fauna include: Fasciolidae, Genus: Fasciola, Fasciola gigantica, Fasciola hepatica, Family: Dicrocoeliidae, Genus: Dicrocoelium, Dicrocoelium dendriticum, Family: Diplostomidae, Genus: Diplostomum, Diplostomum spathaceum, Family: Heterophyidae, Genus: Haplorchis, Haplorchis taichui, Family: Notocotylidae, Genus: Notocotylu, Notocotylus aegyptiacus, Family: Bucephalidae, Genus: Rhipidocotyle, Rhipidocotyle illense.
My article is about parasites infections in pike (Esox lucius) from Anzali Wetland and their impacts on biometric characticties in host fish.
