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Titolo:
PARASITE-HOST COEVOLUTION AND GEOGRAPHIC PATTERNS OF PARASITE INFECTIVITY AND HOST SUSCEPTIBILITY
Autore:
MORAND S; MANNING SD; WOOLHOUSE MEJ;
Indirizzi:
UNIV PERPIGNAN,LAB BIOL ANIM,52 AVE VILLENEUVE F-66860 PERPIGNAN FRANCE UNIV OXFORD,DEPT ZOOL OXFORD OX1 3PS ENGLAND
Titolo Testata:
Proceedings - Royal Society. Biological Sciences
fascicolo: 1366, volume: 263, anno: 1996,
pagine: 119 - 128
SICI:
0962-8452(1996)263:1366<119:PCAGPO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCHISTOSOMA-MANSONI; BIOMPHALARIA-GLABRATA; INTERMEDIATE HOST; BULINUS-AFRICANUS; COMPATIBILITY; HAEMATOBIUM; TREMATODE; GENETICS; POPULATIONS; ADAPTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
S. Morand et al., "PARASITE-HOST COEVOLUTION AND GEOGRAPHIC PATTERNS OF PARASITE INFECTIVITY AND HOST SUSCEPTIBILITY", Proceedings - Royal Society. Biological Sciences, 263(1366), 1996, pp. 119-128

Abstract

Ebert (1994) has proposed the rule that parasites are, with few exceptions, more infective to sympatric hosts than to allopatric hosts. We test this rule using field data for schistosome infections of planorbid snails and find that, although sympatric parasite-host combinations do tend to be more compatible, there are exceptions where particular allopatric parasite-host populations are significantly more compatible. We develop a mathematical model of the dynamics of the parasite-host interaction where parasite infectivity and host susceptibility are defined by the matching of genotypes in a diploid system. The model predicts dynamic polymorphisms where parasite allele frequencies track hostallele frequencies but with a lag. Because of this lag it is possiblefor allopatric combinations to be more compatible than sympatric combinations. Any 'rule' that precludes this possibility is unlikely to prove robust.

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Documento generato il 09/07/20 alle ore 20:11:53