Parasitism represents a strong selective pressure that exerts and continues to influence various aspects of organisms' biology, such as the immune system, mate choice, behavior, and many others. Parasitism has also played an important role in shaping the toxicity of various organisms. In particular, in the evolution of aposematism, more specifically in the form of conspicuous coloration, it is thought that parasitism counteracted the initial cost of toxicity and the easy identification of conspicuous prey by predators, favoring greater immune defense. These colorations may have been positively selected by parasites and pathogens: directly, by providing fitness benefits in terms of disease resistance, based on molecules with the dual role of pigments and antioxidants, but also indirectly, in the form of traits useful for defense against predators.
Il parassitismo rappresenta una forte pressione selettiva che ha agito e tutt’ora agisce su diversi aspetti della biologia degli organismi, come il sistema immunitario, la scelta del partner, il comportamento e molti altri. Il parassitismo ha inoltre giocato un ruolo importante nel modellare la tossicità di diversi organismi. In particolare, nell’evoluzione dell’aposematismo, più precisamente nella forma di colorazioni vistose, si pensa che il parassitismo abbia contrastato l’iniziale costo della tossicità e della facile individuazione delle prede appariscenti da parte dei predatori, favorendo una maggior difesa immunitaria. Tali colorazioni possono essere state selezionate positivamente da parassiti e patogeni: in maniera diretta, portando benefici in termini di fitness per quanto riguarda la resistenza alle malattie, avendo alla base molecole con il duplice ruolo di pigmenti e antiossidanti, ma anche in maniera indiretta, sotto forma di tratti utili per la difesa contro i predatori.
L’INTERAZIONE EVOLUTIVA TRA PARASSITISMO E APOSEMATISMO
CONDOTTA, COSTANZA
2024/2025
Abstract
Parasitism represents a strong selective pressure that exerts and continues to influence various aspects of organisms' biology, such as the immune system, mate choice, behavior, and many others. Parasitism has also played an important role in shaping the toxicity of various organisms. In particular, in the evolution of aposematism, more specifically in the form of conspicuous coloration, it is thought that parasitism counteracted the initial cost of toxicity and the easy identification of conspicuous prey by predators, favoring greater immune defense. These colorations may have been positively selected by parasites and pathogens: directly, by providing fitness benefits in terms of disease resistance, based on molecules with the dual role of pigments and antioxidants, but also indirectly, in the form of traits useful for defense against predators.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/101793