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Titolo:
Dispersal, vaccination and regression of immune defence organs
Autore:
Moller, AP; Erritzoe, J;
Indirizzi:
Univ Paris 06, CNRS, FRE 2365, Lab Ecol Evolut Parasitaire, F-75252 Paris 05, France Univ Paris 06 Paris France 05 olut Parasitaire, F-75252 Paris 05, France
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 5, volume: 4, anno: 2001,
pagine: 484 - 490
SICI:
1461-023X(200109)4:5<484:DVAROI>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONSPECIFIC REPRODUCTIVE SUCCESS; LOCAL ADAPTATION; FABRICIUS; BURSA; THYMUS; BIRDS; PHILOPATRY; SELECTION; EVOLUTION; SYSTEMS;
Keywords:
bursa of Fabricius; cellular memory; cost of immunity; parasite-host interaction; prospecting; thymus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Moller, AP Univ Paris 06, CNRS, FRE 2365, Lab Ecol Evolut Parasitaire, BatA,7eme Etage,7 Quai St Bernard, F-75252 Paris 05, France Univ Paris 06 BatA,7eme Etage,7 Quai St Bernard Paris France 05
Citazione:
A.P. Moller e J. Erritzoe, "Dispersal, vaccination and regression of immune defence organs", ECOL LETT, 4(5), 2001, pp. 484-490

Abstract

The thymus in vertebrates and the bursa of Fabricius in birds regress before reproduction, while the immunological information of these organs is maintained as cell memory. Regression at a certain age presupposes that individuals have achieved exposure to a large fraction of parasites in the environment. Here we present a new scenario for regression of immune defence organs, based on optimality reasoning. This scenario links early involution of immune defence organs with (1) effects of exposure to parasites on adaptiveimmune responses to these parasites, (2) exposure to local parasite communities during natal dispersal and migration as a means of "vaccination" against local parasites, and (3) the function of visits to future breeding sites by juveniles as a means of exposure to local parasites. This scenario provides explanations for why natal dispersal is longer than breeding dispersal, for sex differences in dispersal, and for why the bursa of Fabricius regresses relatively early in life among bird species with delayed start of reproduction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 21:38:27