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2. Studies on the development of Procamallanus (Spirocamallanus) rebecae (Nematoda: Camallanidae), a parasite of cichlid fishes in Mexico
- Creator:
- Moravec, F., Mendoza-Franco, E., Vargas-Vázquez, J., and Vivas-Rodríguez, C.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Procamallanus, Spirocamallanus, Cichlasoma, Copepoda, development, paratenic hosts, and Mexico
- Language:
- English
- Description:
- A description is given of the life cycle of the nematode Procamallanus (Spirocamallanus) rebecae (Andrade-Salas, Pineda-Lopez et García-Magafia, 1994), an intestinal parasite of cichlids in Mexico. The copepod Mesocyclnps sp. was found to be a suitable experimental intermediate host. After the copepod’s ingestion of free first-stage larvae of the nematode, these enter the haemocoel of the intermediate host; they moult twice (on the 3rd and 5-6th day p.i. at 21-22”C) before they attain the third, infective stage. The third-stage larva already possesses the large buccal capsule without spiral thickenings and its tail tip bears three cuticular spines. The larvae undergo two additional moults (13-14 days and 42 days p.i.) in the definitive host (Cichlasoma urophthalmus) before changing to adults; the prepatent period is about 2-3 months. Experimental infection of guppies, Poecilia reticulata, have shown that these fishes may become paratenic (metaparatenic) hosts of this parasite. The morphology of individual larval stages of this nematode is described.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. The development of Procamalianus (Spirocamallanus) neocaballeroi (Nematoda: Camallanidae), a parasite of Astyanax fasciatus (Pisces) in Mexico
- Creator:
- Moravec, František and Vargas-Vázquez, Joaquin
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Nematoda, Procamalianus, Spirocamallanus, Astyanax, Copepoda, development, and Mexico
- Language:
- English
- Description:
- The development of the nematode Procamalianus (Spirocamallanus) neocaballeroi (Caballero-Deloya, 1977), an intestinal parasite of the characid fish, Astyanax fasciatus (Cuvier) in Mexico, was studied in the experimental copepod intermediate host, Mesocyclops sp. After the copepod’s ingestion of free first-stage larvae of the nematode, these penetrate into the haemocoel of the intermediate host; they moult twice (on the 3rd and 4-5th day p.i. at 21-22”C) before they attain the third, infective stage. The third-stage larva already possesses the large buccal capsule subdivided into an anterior broad portion with eight spiral thickenings (as observed in lateral view) and a narrow posterior portion, and its tail tip bears three conical processes. The definitive host acquires infection by feeding on infected copepods; in the intestine of this fish, the nematode larvae undergo two more moults (on the 10th and 14-15th day p.i. at 25-32°C) before attaining their maturity. The prepatent period is approximately two months.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public