INVESTIGADORES
HAMANN monika Ines
artículos
Título:
Population biology of Spirocamallanus inopinatus (Travassos, Artigas et Pereira, 1928) (Nematoda: camallanidae) in Serrasalmus spilopleura Kner, 1860 (Pisces: Characidae) From Corrientes, Argentina
Autor/es:
HAMANN M. I.
Revista:
RESEARCH AND REVIEWS IN PARASITOLOGY
Editorial:
Asociación de Parasitólogos Españoles
Referencias:
Lugar: Barcelona; Año: 1999 vol. 59 p. 1 - 6
ISSN:
1133-8466
Resumen:
From February 1987 to February 1989, the population biology of Spirocamallanus inopinatus (Travassos, Artigas et Pereira, 1928) Petter, 1979, in its definitive host, the fish Serrasalmus spilopleura Kner, 1860, was studied in two ponds in a subtropical permanent habitat in the northeast of Argentina. Fish from Ramada paso pond presented a 65% prevalence of infection and a range of 1-16 nematodes per fish, while fish from Aeroclub pond presented a 31% prevalence of infection and 1-7 nematodes per fish. The nematode population did not present a clear annual cycle of maturation; females with larvae in the uterus were recorded in both years. Juvenile worm recruitment occurred in February and October; this was probably caused by the behavior of the copepods as first intermediate hosts. Fish collected from Ramada Paso pond showed a high prevalence on infection during the first period of study (1987), diminishing the following year. In fish from Aeroclub pond, the prevalence of infection did not vary significantly during the two years. This nematode population presented a positive correlation between the intensity of infection and the size of the hosts. Regarding the male and female hosts, the results indicated that this was not an influential factor at the parasitic level. The ?closed? lenitic environment Ramada Paso pond) evidenced the greatest endoparasitic intensity and prevalence of infection, showing a significant correlation between rainfall and mean intensity of infection.