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12. Evidence of host blood feeding by the monogenean, Ancyrocephalus mogurndae (Monogenea: Ancyrocephalidae) from the gills of the mandarin fish, Siniperca chuatsi
- Creator:
- Gao, Qian, Nie, Pin, and Yao, Wei J.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Monogenea, Ancyrocephalus mogurndae, blood ingestion, iron content, mandarin fish, and Siniperca chuatsi
- Language:
- English
- Description:
- By examining iron contents, it is demonstrated that the monogenean Ancyrocephalus mogurndae (Yamaguli, 1940) feeds on the blood of its host, the mandarin fish Siniperca chuatsi (Basilcwsky), The iron content and then the quantity of blood necessary to produce this amount of iron are found different in young and fully-matured worms. Young worms contain higher levels of iron and estimated amount of blood. It is suggested that/1, mogurndae may start to feed on host blood as attached on gills, and the amount of blood ingested by young worms may vary from 0.01 to 1.00 μΙ before reproduction. The difference between young and fully-malurcd worms may be accounted for by the elimination of haematin and change of food composition in matured worms and may also be affected by reproduction. Experimental infections of the monogenean may provide supportive information for explaining the difference, and further studies should also examine the effect of immune components in host blood or mucus on the intestines of the parasite.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
13. Experimental transmission of Sparicotyle chrysophrii (Monogenea: Polyopisthocotylea) to gilthead seabream (Sparus aurata) and histopathology of the infection
- Creator:
- Sitjà-Bobadilla, Ariadna and Alvarez-Pellitero, Pilar
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Monogenea, gills, ectoparasites, haematology, anaemia, and Sparidae
- Language:
- English
- Description:
- The polyopisthocotylean Sparicotyle chrysophrii (Van Beneden et Hesse, 1863) was experimentally transmitted to gilthead seabream (Sparus aurata L.) by exposure to eggs (EGT) and by cohabitation with naturally parasitized fish (CT). In EGT trials, the infection was successfully transmitted by introducing containers with monogenean eggs in the fish tanks, with the highest infection level (85.7% prevalence, 3.3 mean intensity) achieved at 6 weeks post exposure (p.e.) to the infection dose of 650 eggs per tank. In CT trials, the progression of the infection was faster and reached higher levels than in EGT. When using small fish juveniles (30 g) (CT-2), infection reached 100% prevalence (mean intensity 8 monogeneans/fish) at 5 weeks p.e., but no eggs could be found in the fish even 10 weeks p.e. By contrast, when larger juveniles (150 g) were used (CT-1), infection levels were lower, but mature adults with eggs were detected starting from 8 weeks p.e. The effect of the parasite on the condition factor, haematocrit, haemoglobin concentration (Hb), red blood cell counts, mean corpuscular haemoglobin concentration (MCHC), mean corpuscular haemoglobin content (MCH) and mean cellular volume (MCV) of infected fish was studied in CT trials. The infection produced hypochromic anaemia, since Hb concentration significantly decreased at 5 and 10 weeks p.e. in CT-2 and at 8 weeks p.e. in CT-1. MCHC was significantly lower in parasitized than in control fish at 5 and 8 weeks p.e. in CT-2 and CT-1, respectively. Also in CT-1, MCH was lower and circulating immature erythrocytes, granulocytes and plasma cells were higher in infected fish than in control ones at 8 weeks p.e. The histopathological effects of the monogenean on the gills of naturally infected fish consisted of lamellar shortening, clubbing and synechiae. The proliferation of the epithelial tissue produced fusion of secondary lamellae, and abundant chloride cells were observed.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
14. Five monogenean species (Allodiscocotylidae, Heteromicrocotylidae, Microcotylidae) from the Pacific seabream Acanthopagrus pacificus (Perciformes: Sparidae) in the Gulf of Tonkin off Vietnam, with descriptions of three new species
- Creator:
- Nguyen, Ha Van, Nguyen, Hung Manh, Ha, Ngo Duy, Ngoc, Chinh Nguyen, Ngoc, Thanh Bui, Le, Sinh Xuan, Tatonova, Yulia, and Greiman, Stephen E.
- Format:
- počítač and online zdroj
- Type:
- model:article and TEXT
- Subject:
- Polyopisthocotylea taxonomy, Monogenea, marine parasites, sparids, and western Pacific
- Language:
- English
- Description:
- A total of 52 specimens of the Pacific seabream Acanthopagrus pacificus Iwatsuki, Kume et Yoshino from the Gulf of Tonkin off Vietnam were examined for monogeneans. Twenty fish were parasitised by 101 individuals of five monogenean species, including two known species Allodiscocotyla diacanthi Unnithan, 1962 and Heterapta chorinemi (Tripathi, 1956), as well as three new species, Polylabroides tienyenensis sp. n., Polylabroides tonkinensis sp. n. and Metacamopia lebedevi sp. n. Polylabroides tienyenensis and P. tonkinensis are morphologically more similar to Polylabroides guangdongensis Zhang et Yang, 2001 in comparison with other species within the genus, based on the absence of small spines on the cirrus. However, P. tonkinensis is distinguished from P. guangdongensis by fewer clamps on the haptor and by the different shapes of the large spines on the cirrus. Similarly, P. tienyenensis differs from P. guangdongensis by vaginal ducts with fewer branches, fewer clamps and smaller egg size. Metacamopia lebedevi is distinguished from Metacamopia chorinemi (Yamaguti, 1953) by the arrangement of testes (one row vs two rows), diverticula absent in the oesophagus, and the number of anchor pairs (one vs two); it differs from Metacamopia oligoplites Takemoto, Amato et Luque, 1996 by the smaller haptor, shape and absence of small sclerotised hooks, the number of ribs in their clamps, and the position of the testes; it can be separated from Metacamopia indica (Unnithan, 1962) by having fewer testes and lacking sclerotised structures in the vagina. The present study also provides the measurements for A. diacanthi, H. chorinemi, and proposes a new key to all species of Polylabroides.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
15. Five new species of Cichlidogyrus (Monogenea: Ancyrocephalidae) from Tilapia brevimanus, T. buttikoferi and T. cessiana from Guinea, Ivory Coast and Sierra Leone (West Africa)
- Creator:
- Pariselle, Antoine and Euzet, Louis
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Monogenea, gill parasites, Cichlidae, Tilapia, and West Africa
- Language:
- English
- Description:
- Three species of cichlid fish, Tilapia brevimanus Boulenger, 1911, T. buttikoferi (Hubrecht, 1881), and T. cessiana Thys van den Audenaerde, 1968, from Guinea, Ivory Coast and Sierra Leone (West Africa) were examined for gill parasites for the first time. Six species of Monogenea were found of which one, Cichlidogyrus digitatus Dossou, 1982, had been previously described. Five new species, all belonging to the genus Cichlidogyrus Papema, 1960, are described herein: C. albareli sp. n., C. hemi sp. n., C. nuniezi sp. n„ C. honhommei sp. n., and C. slembroucki sp.n.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
16. Five new species of Pseudorhabdosynochus (Monogenea: Diplectanidae) from the gills of Epinephelus costae (Teleostei: Serranidae)
- Creator:
- Neifar, Lassâd and Euzet, Louis
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Monogenea, Diplectanidae, Pseudorhabdosynochus bouaini, Pseudorhabdosynochus dolicocolpos, Pseudorhabdosynochus enitsuji, Pseudorhabdosynochus sinediscus, Pseudorhabdosynochus sosia, gill parasite, Epinephelus costae, Serranidae, Tunisia, and Senegal
- Language:
- English
- Description:
- A survey of the gill parasites of Epinephelus costae (Teleostei: Serranidae) was conducted between 2001 and 2005 in the Gulf of Gabès (Tunisia). Five new species of Diplectanidae (Monogenea) were collected, all belonging to Pseudorhabdosynochus Yamaguti, 1958: P. bouaini sp. n., P. dolicocolpos sp. n., P. enitsuji sp. n., P. sinediscus sp. n., and P. sosia sp. n. These five species differ from each other and from all described species of Pseudorhabdosynochus by the morphology and size of their sclerotized vagina. These diplectanids (except P. sinediscus) were also collected from the same host off Dakar in 1981 and 1989. The present paper includes the descriptions and taxonomic considerations of each of these species in addition to an amended diagnosis of Pseudorhabdosynochus. A key to the five new species parasitizing E. costae is provided. These five species are the first diplectanids described from E. costae.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
17. Four new Dactylogyrus species (Monogenea: Dactylogyridae) from Iranian fishes
- Creator:
- Jalali, B., Papp, M., and Molnár, K.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Dactylogyrus, Monogenea, freshwater fishes, Iran, and zoogeography
- Language:
- English
- Description:
- Four new Dactylogyrus species (Dactylogyrus pallicirrus sp. n. from Cyprinion macrostomum and Cyprinion watsoni, D. rohdeianus sp. n. and D. capoetae sp. n. from Capotta damascina, and D. schizocypris sp. n. from Schizocypris hrucei) are described from endemic Iranian freshwater fishes. Comments on the monogenean fauna of Iranian freshwater fishes are presented.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
18. Four new species of Cichlidogyrus (Monogenea: Ancyrocephalidae), gill parasites of Tilapia cabrae (Teleostei: Cichlidae), with discussion on relative length of haptoral sclerites
- Creator:
- Pariselle, Antoine and Euzet, Louis
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Monogenea, Ancyrocephalidae, Cichlidogyrus berradae, C. revesati, C. legendrei, C. lemoallei, Tilapia cabrae, Cichlidae, and Africa
- Language:
- English
- Description:
- Tilapia cabrae Boulenger, 1899, a cichlid fish from coastal lowlands of the Republic of Congo (Africa), was examined for gill parasites. Four new species of the Monogenea were found, all belonging to Cichlidogyrus (Ancyrocephalidae): C. berradae sp. n., C. revesati sp. n., C. legendrei sp. n., and C. lemoallei sp. n. A possible relationship between the relative size of haptoral sclerites (i.e., uncinuli compared to gripi) and microhabitat selection in the studied host-parasite model is discussed.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
19. Gyrodactylus eyipayipi sp. n. (Monogenea: Gyrodactylidae) from Syngnathus acus (Syngnathidae) from South Africa
- Creator:
- Vaughan, David B., Christison, Kevin W., Hansen, Haakon, and Shinn, Andrew P.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Monogenea, Gyrodactylus eyipayipi, Syngnathus acus, pipefish, public aquarium, and South Africa
- Language:
- English
- Description:
- Gyrodactylus eyipayipi sp. n. is described from the skin, gills, flute and male brood pouch of captive specimens of the greater pipefish Syngnathus acus L., collected for and maintained at the Two Oceans Aquarium in Cape Town, South Africa. It is the first marine Gyrodactylus species reported from the African continent. The new species is compared to the three known Gyrodactylus species affecting syngnathiform hosts (G. pisculentus Williams, Kritsky, Dunnigan, Lash et Klein, 2008, G. shorti Holliman, 1963, and G. syngnathi Appleby, 1996). Although all four species have similar-sized and shaped attachment hooks with some overlap, separation of the species is possible using marginal hook morphology. The marginal hooks of G. eyipayipi measure (mean) 30 µm in total length and are larger than those of the three other species (mean, 24-28 µm). Gyrodactylus eyipayipi can also be discriminated based on differences in the shape of the marginal hook sickle notably by its long sickle point which extends far beyond the toe, its blunt rounded toe and, by the approximate rectangular shape to the base of the sickle. By comparison, the sloping toe regions of G. pisculentus and G. syngnathi give the sickle bases an approximately triangular shape, whilst the short sickle point and open aperture to the sickles of G. shorti allow for their discrimination from G. eyipayipi.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
20. Gyrodactylus orecchiae sp. n. (Monogenea: Gyrodactylidae) from farmed populations of gilthead seabream (Sparus aurata) in the Adriatic Sea
- Creator:
- Paladini, Giuseppe, Cable, Joanne, Fioravanti, Maria L., Faria, Patricia J., Di Cave, David, and Shinn, Andrew P.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Monogenea, Gyrodactylus orecchiae, gilthead seabream, Sparus aurata, Croatia, and Albania
- Language:
- English
- Description:
- Gyrodactylus orecchiae sp. n. (Monogenea, Gyrodactylidae) is described from the skin, fins, eyes and gills of juvenile Sparus aurata L. (gilthead seabream) following two outbreaks of gyrodactylosis amongst stocks held in inshore floating cages on the Adriatic coast of Albania and Croatia. Fish were heavily infected (1000+ gyrodactylids/fish) with G. orecchiae which reportedly resulted in ~2-10% mortality amongst the infected stock. Morphologically, the haptoral hooks of G. orecchiae most closely resemble those of Gyrodactylus arcuatus Bychowsky, 1933 in the approximate shape of the ventral bar with its pronounced ventral bar processes and marginal hook sickles which possess a square line to the inner edge of the sickle blade and large rounded heels. The marginal hooks are also morphologically similar to those of Gyrodactylus quadratidigitus Longshaw, Pursglove et Shinn, 2003 and Gyrodactylus colemanensis Mizelle et Kritsky, 1967, but G. orecchiae can be readily discriminated from all three species by the characteristic infolding of the hamuli roots and the shape of the marginal hook sickle. Molecular sequencing of the ITS1, 5.8S, ITS2 regions (513+157+404 bp, respectively) of G. orecchiae and alignment with other gyrodactylids for which these same genomic regions have been determined, suggests that this is a new species. No similarities were found when the ITS1 region of G. orecchiae was compared with 84 species of Gyrodactylus available on GenBank.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public