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2. Cenotes (sinkholes) of the Yucatan Peninsula, Mexico, as a habitat of adult trematodes of fish
- Creator:
- Scholz, T., Vargaz-Vázguez, J., Moravec, F., Vivas-Rodríguez, C., and Mendoza-Franco, E.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Digenea, fish, cenotes, Yucatan, Mexico, and zoogeography
- Language:
- English
- Description:
- Examination of a total of 581 fish specimens of 15 species from 39 cenotes (sinkholes) in the Yucatan Peninsula, southeastern Mexico, revealed the presence of 10 species of adult trematodes. These were as follows: Saccocoelioides sogandaresi Lumsden, 1963, Saccocoelinides sp. (family Haploporidae), Cichlasotrema ujati Pineda et Andrade, 1989 (Angiodictyidae), Crassicutis cichlasomae Manter, 1936 (Homalometridae), Magnivitellinum simplex Kloss, 1966 (Macroderoididae), Stunkardiel-la minima (Stunkard, 1938) (Acanthostomidae), Oligogonotylus manieri Watson, 1976 (Cryptogonimidae), Genarchella tropica (Manter, 1936), G. astyanactis (Watson, 1976), and G. isabellae (Lamothe-Argumedo, 1977) (Derogenidae). Saccocoelioides sogandaresi is reported from Mexico for the first time. Poecilia velifera and P. latipunctata for S. sogandaresi, Cichlasoma octo-fasciatum for C. cichlasomae, Cichlasoma friedrichslahli and C. meeki for O. manieri, and C. meeki, C. octofasciatum and Go-hiomorus dormitor for C. isabellae represent new host records. Most species found are described and figured and their host range
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Experimental observations on the development of Anguillicola crassus (Nematoda: Dracunculoidea) in its definitive host, Anguilla anguilla (Pisces)
- Creator:
- Moravec, F., Di Cave, D., Orecchia, P., and Paggi, L.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Anguillicola, eel, development, and definitive host
- Language:
- English
- Description:
- The development of the swimbladder nematode Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 in the definitive host (eels) was studied under experimental conditions. Small eels, Anguilla anguilla (L.) with body length 8-16 cm were infected by feeding them intermediate host copepods (Cyclops strenuus Fischer) harbouring third-stage larvae of this parasite. These experiments showed that, at 20-22° C, the development from the third-to the fourth-stage larvae lasted approximately three weeks, but some retarding third-stage larvae occurred in the wall of the host’s swimbladder or hyperparasitizing in the cuticle of adult nematodes as late as three months p.i. Young adults developed in the lumen of the swimbladder within approximately one month and noneinbryonated eggs first appeared in females 6-7 weeks p.i. The prepatent period was about three months and the patent period could be estimated to last no more than a month. Females degenerated soon after oviposition. The experiments confirmed that the size of mature A. crassus depends on the body size of its definitive host (eel).
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Metacercariae of trematodes of fishes from cenotes 0= sinkholes) of the Yucatan Peninsula, Mexico
- Creator:
- Scholz, T., Vargas-Vázquez, J,, Moravec, F., Vivas-Rodriguez, C., and Mendoza-Franco, E.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Trematoda, metacercariae, fishes, cenotes, Yucatan, Mexico, and zoogeography
- Language:
- English
- Description:
- The paper presents a survey of the metacercariae of trematodes found in 581 fishes of 15 species from 39 cenotes (sinkholes) of the Yucatan Peninsula, southeastern Mexico. The following 21 species were found: Echinochasmus sp. 1, Echino-chasmus sp. 2, Echinostomatinae gen. sp. (family Echinostomatidae), Stunkardiella minima (Stunkard, 1938), Alrophecaecum (?) astorquii (Watson, 1976), Peiaezia loossi (Pérez Vigueras, 1957) (Acanthostomidae); Ascocotyle (Ascocotyle) tenuicollis Price, 1935, Ascocotyle (Ascolotyle) sp. 1, Ascocotyle (Phagicola) diminuta (Stunkard et Haviland, 1924), Ascocotyle (Phagicola) sp. 2 (= Phagicola angrense Travassos, 1916 of Salgado-Maldonado and Aguirre-Macedo, 1991), Ascocotyle (Phagicola) sp. 3 (Heterophyidae); Cladocystis trifolium (Braun, 1901) (Opisthorchiidae); Oligogonotylus manieri Watson, 1976 (Cryptogonimidae); Clinostomum cf. complanatum (Rudolphi, 1814) (Clinostomidae); Diplostomum (Auslrodiplostomum) com-paclum (Lutz, 1928), Posthodiplostomum minimum (MacCallum, 1921), Posthodiplostomum sp. (Diplostomidae); Neodiplos-tomidae gen. sp. 1 ; Neodiplostomidae gen. sp. 2 (Neodiplostomidae); and Apharyngostrigea sp. (Strigeidae). All species found are described and figured, and their life cycles are briefly discussed.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5. Nematodes parasitic in fishes of cenotes (= sinkholes) of the Peninsula of Yucatan, Mexico. Part 2. Larvae
- Creator:
- Moravec, F., Vivas-Rodriguez, C., Scholz, T., Vargas-Vázquez, J., Mendoza-Franco, E., Schmitter-Soto, J. J., and González-Solís, D.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- larval nematodes, parasites, fishes, cenotcs, Yucatan, and Mexico
- Language:
- English
- Description:
- This paper comprises a systematic survey of larval nematodes collected from fishes from cenotes (= sinkholes) of the Peninsula of Yucatan, southern Mexico, in 1993-1994. Larvae of the following nine species were recorded: Physocephalus sexa-lalus, Acuariidae gen. sp., Spiroxys sp., Falcausira sp., Hysterothylacium cenotae, Contracaecum sp. Type 1, Contracaecum sp. Type 2, Goezia sp., and Eustrongylides sp. Larvae of P. sexalatus are recorded from fishes (Rhamdia guatemalensis) for the first time. The larvae are briefly described and illustrated and problems concerning their morphology, taxonomy, hosts and geographical distribution are discussed. Adults of these larvae are parasitic in piscivorous fishes, reptiles, birds and mammals (definitive hosts). Fishes harbouring the larvae of these parasites serve as paratenic hosts, being mostly an important source of infection for the definitive hosts.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
6. Nematodes parasitic in fishes of cenotes (= sinkholes) of the Peninsula of Yucatan, Mexico. Part Í. Adults
- Creator:
- Moravec, F., Vivas-Rodríguez, C., Scholz, T., Vargas-Vázquez, J., Mendoza-Franco, E., and González-Solís, D.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- parasitic nematodes, fishes, cenotes, Mexico, and Yucatan
- Language:
- English
- Description:
- The present paper comprises a systematic survey of adult nematodes collected from fishes from cenotes (= sinkholes) of the Peninsula of Yucatan, southeastern Mexico, in 1993-1994. Examinations of a total of 533 fishes (17 species) originating from 39 cenotes from the Mexican states of Yucatan and Quintana Roo revealed the presence of the following nine nematode species: Rhabdochona (Rhabdochona) kidderi, Procamallanus (Spirocamallanus) rebecae, P. (S.) neacaballeroi, Philome-trnides caudata, Hysterothylacium cenotae, Pseudocapillaria yucatanensis, Paracapillaria rhamdiae, P. teixerafreitasi and Capillostrongyloides sp. (only females). Four species (R. kidderi, P. rebecae, P. neacaballeroi and Capillostrongyloides sp.) are briefly described and illustrated and some problems concerning their morphology, taxonomy, hosts and geographical distribution are discussed. Taxonomic changes include Procamallanus (Spirocamallanus) neacaballeroi (Caballero-Deloya, 1977) comb. n. and Procamallanus (Spirocamallanus) rebecae (Andrade-Salas, Pineda-López ct Garcfa-Magana, 1994) comb. n. The nematode fauna of fishes in cenotes of the Yucatan Peninsula shows its appurtenance to the Neotropical fauna with close affinities with that of fish nematodes from South America, but with a considerable degree of endemism.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
7. Observations on the development of Syncuaria squamata (Nematoda: Acuariidae), a parasite of cormorants, in the intermediate and paratenic hosts
- Creator:
- Moravec, F. and Scholz, T.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Syncuaria, development, intermediate host, paratenic host, Ostracoda, and cormorant
- Language:
- English
- Description:
- The development of the nematode Syncuaria squamata (Linstow, 1883), a gizzard parasite of cormorants, was experimentally studied in the ostracod Notodromas monacha. After the eggs of this nematode have been swallowed by the ostracod, the toothed first-stage larvae of the parasite are released and penetrate through the intestinal wall into the haemocoel of the crustacean. Before attaining the infective third stage, the larvae moult twice in the body of the intermediate host (9-11 and 13-15 days after infection at water temperatures of 20-22° C). The fishes Alhumaides hipunctatus, Noemacheilus barbatulus, Oncor-hynchus mykiss and Poecilia reticulata were for the first time recorded as suitable experimental paratenic hosts of S. squamata third-stage larvae in which a slight growth of larvae may occur. The first recorded natural paratenic host of this nematode was tench, Tinca tinea, originating from a South-Bohemian pond where cormorants occur. Paratenic hosts are apparently the main source of S. squamata infection for cormorants.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
8. Philometroides caudata sp. n. (Nematoda: Philometridae) from Rhamdia guatemalensis (Pisces) in Yucatan, Mexico
- Creator:
- Moravec, F., Scholz, T., and Vivas-Rodríguez, C.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Philometroides, parasitic nematodes, Rhamdia, fish, Yucatan, and Mexico
- Language:
- English
- Description:
- A new nematode species, Philometroides caudata sp.n., is described from the swimbladder (under the serosa cover) of the freshwater pimelodid catfish, Rhamdia guatemalensis, from cenotes (— sinkholes) in Yucatan, southeastern Mexico. It differs from all hitherto known members of the genus, except P. maplestoni (Travassos, Artigas et Pereira, 1928), in having the functional anus, the conical tail with a terminal knob-like structure and the oesophagus without an anterior inflation in female, and in the structure of the caudal end in male. It can be distinguished from P. maplestoni (described only from females) by the extent of embossed cuticle, the size of body and the host type. P. caudata, representing a Neotropical element, is the first Philometroides species reported from freshwater fishes in Mexico.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
9. Present occurrence of Anguillicola novaezelandiae (Nematoda: Dracunculoidea) in Europe and its development in the intermediate host
- Creator:
- Moravec, F., Di Cave, D., Orecchia, P., and Paggi, L.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Anguillicola novaezelandiae, Anguilla anguilla, Copepoda, and development
- Language:
- English
- Description:
- An examination of a sample of European eels, Anguilla anguilla (L.), collected from Lake Bracciano near Rome in 1993, the only known European locality with the occurrence of the introduced swimbladder nematode Anguillicola novaezelandiae Moravec et Taraschewski, 1988, revealed for the first time the presence of two Anguillicola species, A. novaezelandiae and A. crassus. In view of the investigations carried out by current authors in Bracciano Lake in the years 1982-1992, it is apparent that the latter species has been introduced into the lake quite recently, where it quickly became a dominant species. The development of A. novaezelandiae was experimentally studied in the copepod intermediate host, Cyclops strenuus, for the first time. The copepods were infected with nematode second-stage larvae at 21-22°C; fully developed infective third-stage larvae were obtained 13 days p.i. The general morphology of individual larval stages of A. novaezelandiae was similar to that of larvae of the related species Λ. crassus.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
10. Pseudocapillaria indica sp. n. (Nematoda: Capillariidae) from the snakehead, Channa gachua (Hamilton) (Pisces), from southern India
- Creator:
- Moravec, F., Razia Beevi, M., Radhakrishnan, S., and Arthur, J.R.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Pseudocapillaria indica, Channa gachua, India, and Nematoda
- Language:
- English
- Description:
- A new nematode species, Pseudocapillaria indica sp. п., is described from the intestine of the freshwater fish Channa gachua (Hamilton) from Kerala, India. It resembles P. tomentosa (Dujardin, 1843), differing from it mainly in the structure of the proximal end of spicule, the shape and structure of the stichocytes and in having smaller eggs (size 0.036-0.048 x 0.023-0.027 mm) which have a different type of superficial structure. Pseudocapillaria indica is the first capillariid species described from freshwater fishes of India and from the whole Oriental Region.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public