Population morphological variation of the monogenean Polystoma andinum, parasitic in Melanophryniscus rubriventris [Anura, Bufonidae]

• Autorzy: Vaira M
• Języki publikacji: EN

Abstrakty

EN

I review geographical distribution, levels of infection and intraspecific morphological variation of Polystoma andinum Combes and Laurent, 1978 from the anuran host Melanophryniscus rubriventris. Also, I provide further information on the breeding biology of the host. The geographical distribution of P. andinum is extended further to the north and south of the original record coinciding with the major part of the range of its host. Parasite infection was recorded at seven of the eight host populations surveyed. Prevalence of infection in each population ranged from 9 to 33% and intensity from 1 to 14 parasites/host. Two morphological characters, reticulate intestine and haptor size:body length ratio, which show intraspecific consistency, readily distinguish P. andinum from each of the four species so far described in Argentina. All specimens assigned to P. andinum showed relatively wide intraspecific variation in hamulus shape. Nevertheless, morphometric analysis of five hamulus characters did not show major distinction between populations. Interlocality variability observed in this study highlights the importance of examining host samples from several localities. Reproduction of M. rubriventris in small shallow ponds is characterised by temporal and spatial uncertainty due to climatic conditions where eggs and tadpoles are exposed to high risks of mortality by pond desiccation. P. andinum reproductive effort may be concentrated into short periods following seasonal heavy rains when toads enter ponds to breed.

Słowa kluczowe

EN

Argentina; geographic distribution; infection; morphological variation; Monogenea; Anura; Bufonidae; Melanophryniscus rubriventris; Polystoma andinum

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2004
• Tom: 49
• Numer: 4
• Opis fizyczny: p.281-291,fig.,ref.

Twórcy

autor

Vaira M

• CONICET - Museo de Ciencias Naturales, Universidad Nacional de Salta, Mendoza 2, 4400, Salta, Argentina

Bibliografia

• Combes C., Laurent R.F. 1974. Polystoma borellii n. sp. (Monogenea, Polystomatidae) parasite de Pleurodema borellii Peracca (Anura, Leptodactylidae) en République Argentine. Acta Zoológica Lilloana, 31,57-94.
• Combes C., Laurent R.F. 1978. Deux nouveaux Polystomatidae (Monogenea) de République Argentine. Acta Zoológica Lilloana, 33, 85-91.
• Combes C., Laurent R.F. 1979. Les Monogènes Polystomatidae de République Argentine: description de deux nouvelles espèces et essai de synthèse. Revista Ibérica de Parasitologia, 79, 545-557.
• De la Riva I. 1995. Geographic distribution. Melanophryniscus rubriventris. Herpetological Review, 26, 152-153.
• Duellman W.E., De la Riva I., Wild E.R. 1997. Frogs of the Hyla armata and Hyla pulchella groups in the Andes of South America, with definitions and analyses of phylogenetic relationships of Andean groups of Hyla. Scientific Papers, Natural History Museum, University of Kansas, 3,1-41.
• Laurent R.F. 1973. Variación geográfica de Melanophryniscus rubriventris (Vellard). Acta Zoológica Lilloana, 26, 317-336.
• Lavilla E.O., Cei J.M. 2001. Amphibians of Argentina. A second update, 1987-2000. Monografie XXVIII Museo Regionale di Scienzi Naturali, Torino.
• Lavilla E.O., Vaira M. 1997. La larva de Melanophryniscus rubriventris rubriventris (Vellard, 1947) (Anura, Bufonidae). Alytes, 15, 19-25.
• Murith D. 1981. Contribution à l’étude de la systématique des polystomes (Monogènes, Polystomatidae) parasites d’amphibiens (Anoures) de basse Côte d’Ivoire. Revue Suisse de Zoologie, 88, 475-533.
• Tinsley R.C. 1990. Host behaviour and opportunism in parasite life cycles. In: Parasitism and host behaviour (Eds. C.J. Barnard and J.M. Behnke). Taylor and Francis, London, 158-192.
• Tinsley R.C. 1995. Parasitic disease in amphibians: control by the regulation of worm burdens. Parasitology, 111, S153—S178.
• Tinsley R.C. 1999. Parasite adaptation to extreme conditions in a desert environment. Parasitology, 119, S31-S56.
• Tinsley R.C., Jackson J.A. 1998. Speciation of Protopolystoma Bychowsky, 1957 (Monogenea: Polystomatidae) in hosts of the genus Xenopus (Anura: Pipidae). Systematic Parasitology, 40, 93-141.
• Vaira M. 2002. Variación de la coloración en poblaciones argentinas de Melanophryniscus rubriventris (Vellard, 1947). Cuadernos de Herpetología, 16, 151-163.
• Vaira M. 2004. Annual variation of breeding patterns of Melanophryniscus rubriventris (Vellard, 1947). Amphibia-Reptilia, in press.
• Vellard J. 1947. Un nuevo batracio del Norte Argentino. Acta Zoológica Lilloana, 4, 115-119.